MicroRNAs(miRNAs)play an important regulatory role in neuronal growth and development.Different mi RNAs target different genes to protect neurons in different ways,such as by avoiding apoptosis,preventing degeneration...MicroRNAs(miRNAs)play an important regulatory role in neuronal growth and development.Different mi RNAs target different genes to protect neurons in different ways,such as by avoiding apoptosis,preventing degeneration mediated by conditional mediators,preventing neuronal loss,weakening certain neurotoxic mechanisms,avoiding damage to neurons,and reducing inflammatory damage to them.The high expression of mi RNAs in the brain has significantly facilitated their development as protective targets for therapy,including neuroprotection and neuronal recovery.mi RNA is indispensable to the growth and development of neurons,and in turn,is beneficial for the development of the brain and checking the progression of various diseases of the nervous system.It can thus be used as an important therapeutic target for models of various diseases.This review provides an introduction to the protective effects of mi RNA on neurons in case of different diseases or damage models,and then provides reference values and reflections on the relevant treatments for the benefit of future research in the area.展开更多
Starting from the reality of protective renovation of the historical environment of traffic cultural heritage,this paper discusses its necessity from the role and value of protective renovation of historical environme...Starting from the reality of protective renovation of the historical environment of traffic cultural heritage,this paper discusses its necessity from the role and value of protective renovation of historical environment on overall protection of traffic cultural heritage and contemporary value exploration.By analyzing the current research status of traffic history,protection theories and methods of historical environment,cultural routes,linear cultural landscape and heritage corridors and other theoretical methods,as well as the effectiveness of digital protection and other technical approaches,this paper demonstrates the theoretical basis and feasible technical approaches for protective renovation of the historical environment of traffic cultural heritage.Moreover,it is suggested to construct the historical environment evaluation system of traffic cultural heritage and form a systematic design process of protective renovation.展开更多
The paper intfoduces a PC-DSP based real-time digital simulator which is portable in size and aimed at the closed-loop testing of various types of protective relays for their design and application. The simulator can ...The paper intfoduces a PC-DSP based real-time digital simulator which is portable in size and aimed at the closed-loop testing of various types of protective relays for their design and application. The simulator can be widely used in not only concerning utilities but also manufacturers and research / certification institutes because of its many functions. The hardware architecture and software implementation of the simulator are described. The main features and functions of the simulator are also展开更多
This paper systematically analyzes the transfer characteristics of the Rogowski-coil Current Transformer and its effect on protective relaying through theoretical analysis, experiments and simulations. The frequency c...This paper systematically analyzes the transfer characteristics of the Rogowski-coil Current Transformer and its effect on protective relaying through theoretical analysis, experiments and simulations. The frequency characteristics and transient characteristics of Rogowski transducer and Rogowski-coil Current Transformer are deeply analyzed based on the physical structure of the transformer.?It is revealed that broad bandwidth of the transformer can improve the performance of protective relaying, and the bandwidth is determined mainly by the parameters of the Rogowski transducer and signal processing circuits. It is also discovered that the measurement errors of transient current mainly depend on the abilities for the current transformer to reproduce an accurate replica of the decaying dc components, which is mainly decided by the decay time constant of the aperiodic component of transient current and the parameters of the integral unit. Finally, some measures are proposed for the performance improvement of Rogowski-coil Current Transformer to meet the requirements of protective relaying system in terms of structural design and testing standards.展开更多
The purpose of this study was to investigate the protective effect of low dose radiation on TCE induced oxidative damage in rats. The oxidative damage of both liver and kidney was assessed by serum alkaline phosphatas...The purpose of this study was to investigate the protective effect of low dose radiation on TCE induced oxidative damage in rats. The oxidative damage of both liver and kidney was assessed by serum alkaline phosphatase (ALP), Gamma Glutamyl Trans-Peptidase (GGTP), Alanine and Aspartate Amino Transferase (ALT & AST) activities in addition concentrations of cholesterol, high density lipoprotein-cholesterol (HDL-c), low density lipoprotein-cholesterol (LDL-c), Triacyglycerols (TGs), urea and creatinine were analyzed. Liver lipid peroxidation (MDA), Nitric Oxide (NO), reduced glutathione (GSH) levels, and activities of both Super-Oxide Dismutase (SOD) and Glutathione Peroxidase (GSH-Px) were measured. Results: TCE administration increase serum ALP, GGTP, ALT, AST activities, cholesterol, triacylglycerols, LDL-c, urea and creatinine concentrations, besides liver MDA and NO, whereas it decreased SOD, GSH-Px activities, GSH level in liver, HDL-c in serum. Low dose of gamma rays (0.5 Gy) exposure significantly improved lipid peroxidation and oxidative injury induced by TCE. Conclusion: The study indicates that treatment with low dose of gamma rays ameliorate harmful effects induced by TCE taking in consideration the effect of gamma radiation as a stimulant of radical detoxification.展开更多
Protection and renewal of historic blocks is not only protection of physical spaces,continuation of intangible cultures,but also management measures of the internal social affairs in the blocks.Taking Chuancheng Stree...Protection and renewal of historic blocks is not only protection of physical spaces,continuation of intangible cultures,but also management measures of the internal social affairs in the blocks.Taking Chuancheng Street Historic Block in Handan City for example,this paper investigated current situation of the block,applied the organic renewal theory in the block renovation,and put forward relevant space,population and management strategies,so as to provide references for the protective renovation of historic blocks.展开更多
The coordination correctness of Nuclear power plant current transformer (CT)/ voltage transformer (PT) polarity and relay protection is often verified through the dynamic test on the unit no load / load operating cond...The coordination correctness of Nuclear power plant current transformer (CT)/ voltage transformer (PT) polarity and relay protection is often verified through the dynamic test on the unit no load / load operating conditions. This paper proposes a test method to prevent and circumvent the failure of the dynamic test abnormality caused by the static power test before the plant power is applied and the whole group is started. Reduce the dynamic test workload and test difficulty, to ensure that the dynamic test safety risk control and control in the state.展开更多
The baffle effectively slowed down debris flow velocity,reduced its kinetic energy,and significantly shortened the distance of debris flow movement.Consequently,they are widely used for protection against natural haza...The baffle effectively slowed down debris flow velocity,reduced its kinetic energy,and significantly shortened the distance of debris flow movement.Consequently,they are widely used for protection against natural hazards such as landslides and mudslides.This study,based on the threedimensional DEM(Discrete Element Method),investigated the impact of different baffle positions on debris flow protection.Debris flow velocity and kinetic energy variations were studied through single-factor experiments.Suitable baffle positions were preliminarily selected by analyzing the influence of the first-row baffle position on the impact force and accumulation mass of debris flow.Subsequently,based on the selected baffle positions and four factors influencing the effectiveness of baffle protection(baffle position(P),baffle height(h),row spacing(S_(r)),and angle of transit area(α)),an orthogonal design was employed to further explore the optimal arrangement of baffles.The research results indicate that the use of a baffle structure could effectively slow down the motion velocity of debris flows and dissipate their energy.When the baffle is placed in the transit area,the impact force on the first-row baffle is greater than that when the baffle is placed in the deposition area.Similarly,when the baffle is placed in the transit area,the obstruction effect on debris flow mass is also greater than that when the baffle is placed in the deposition area.Through orthogonal experimental range analysis,when the impact on the first row of baffles is used as the evaluation criterion,the importance of each influencing factor is ranked asα>P>S_(r)>h.When the mass of debris flow behind the baffle is regarded as the evaluation criterion,the rank is changed to P>α>S_(r)>h.The experimental simulation results show that the optimal baffle arrangement is:P_(5),S_(r)=16,α=35°,h=9.展开更多
Original statement in the caption of Fig.5:Fig.5.JinMaiTong(JMT)treatment restored the perturbed central carbohydrate metabolism in the circulation and sciatic nerve of diabetic peripheral neuropathy(DPN)rats.Dash lin...Original statement in the caption of Fig.5:Fig.5.JinMaiTong(JMT)treatment restored the perturbed central carbohydrate metabolism in the circulation and sciatic nerve of diabetic peripheral neuropathy(DPN)rats.Dash line arrows indicate the direct metabolic reactions,and solid line arrows indicate the indirect reactions.*P<0.05 and**P<0.01.ns:no significant difference.CON:control;TCA:tricarboxylic acid cycle;ADP:adenosine diphosphate:ATP:adenosine triphosphate;GDP:guanosine diphosphate;GTP:guanosine triphosphate.展开更多
Fritillaria taipaiensis P.Y.Li is a widely used medicinal herb in treating pulmonary diseases.In recent years,its wild resources have become scarce,and the demand for efficient artificial cultivation has significantly...Fritillaria taipaiensis P.Y.Li is a widely used medicinal herb in treating pulmonary diseases.In recent years,its wild resources have become scarce,and the demand for efficient artificial cultivation has significantly increased.This article is the first to apply phosphate solubilizing bacteria isolated from the rhizosphere soil of F.taipaiensis P.Y.Li to the cultivation process of F.taipaiensis P.Y.Li.The aim is to identify suitable reference strains for the artificial cultivation and industrial development of F.taipaiensis P.Y.Li by examining the effects of various phosphate solubilizing bacteria and their combinations on photosynthesis,physiological and biochemical properties,and gene expression related to the protective enzyme system in F.taipaiensis P.Y.Li.The experiment,conducted in pots at room temperature,included a control group(CK)and groups inoculated with inorganic phosphorussolubilizing bacteria:W1(Bacillus cereus),W2(Serratia plymuthica),W12(Bacillus cereus and Serratia plymuthica),and groups inoculated with organophosphorus-solubilizing bacteria:Y1(Bacillus cereus),Y2(Bacillus cereus),Y12(Bacillus cereus and Bacillus cereus),totaling seven groups.Compared to CK,most growth indices in the bacterial addition groups showed significant differences,with W12 achieving the highest values in all indices except the leaf area index.The content of photosynthetic pigments,photosynthetic parameters,and osmoregulatory substances increased variably in each bacterial treatment group.W12 exhibited the highest content of chlorophyll a and soluble protein,while W1 had the highest free proline content.The activities of peroxidase(POD),superoxide dismutase(SOD),and catalase(CAT)in all inoculated groups were higher than in CK,with significant changes in SOD and CAT activities.The malondialdehyde(MDA)content in all inoculated groups was lower than in CK,with Y12 being the lowest,at approximately 30%of CK.Gene expression corresponding to these three enzymes also increased variably,with POD expression in Y2 being the highest at 2.73 times that of CK.SOD and CAT expression in Y12 were the highest,at 1.84 and 4.39 times that of CK,respectively.These results indicate that inoculating phosphate solubilizing bacteria can enhance the growth of F.taipaiensis P.Y.Li,with the mixed inoculation groups W12 and Y12 demonstrating superior effects.This lays a theoretical foundation for selecting bacterial fertilizers in the cultivation process of F.taipaiensis P.Y.Li.展开更多
BACKGROUND Dexmedetomidine and propofol are two sedatives used for long-term sedation.It remains unclear whether dexmedetomidine provides superior cerebral protection for patients undergoing long-term mechanical venti...BACKGROUND Dexmedetomidine and propofol are two sedatives used for long-term sedation.It remains unclear whether dexmedetomidine provides superior cerebral protection for patients undergoing long-term mechanical ventilation.AIM To compare the neuroprotective effects of dexmedetomidine and propofol for sedation during prolonged mechanical ventilation in patients without brain injury.METHODS Patients who underwent mechanical ventilation for>72 h were randomly assigned to receive sedation with dexmedetomidine or propofol.The Richmond Agitation and Sedation Scale(RASS)was used to evaluate sedation effects,with a target range of-3 to 0.The primary outcomes were serum levels of S100-βand neuron-specific enolase(NSE)every 24 h.The secondary outcomes were remifentanil dosage,the proportion of patients requiring rescue sedation,and the time and frequency of RASS scores within the target range.RESULTS A total of 52 and 63 patients were allocated to the dexmedetomidine group and propofol group,respectively.Baseline data were comparable between groups.No significant differences were identified between groups within the median duration of study drug infusion[52.0(IQR:36.0-73.5)h vs 53.0(IQR:37.0-72.0)h,P=0.958],the median dose of remifentanil[4.5(IQR:4.0-5.0)μg/kg/h vs 4.6(IQR:4.0-5.0)μg/kg/h,P=0.395],the median percentage of time in the target RASS range without rescue sedation[85.6%(IQR:65.8%-96.6%)vs 86.7%(IQR:72.3%-95.3),P=0.592],and the median frequency within the target RASS range without rescue sedation[72.2%(60.8%-91.7%)vs 73.3%(60.0%-100.0%),P=0.880].The proportion of patients in the dexmedetomidine group who required rescue sedation was higher than in the propofol group with statistical significance(69.2%vs 50.8%,P=0.045).Serum S100-βand NSE levels in the propofol group were higher than in the dexmedetomidine group with statistical significance during the first six and five days of mechanical ventilation,respectively(all P<0.05).CONCLUSION Dexmedetomidine demonstrated stronger protective effects on the brain compared to propofol for long-term mechanical ventilation in patients without brain injury.展开更多
Objective: To explore the protective effect of camellia oil against H2O2-induced oxidative stress injury in rat H9C2 cardiomyocytes. Methods: CCK8 method was used to detect the cell survival rate of H9C2 cardiomyocyte...Objective: To explore the protective effect of camellia oil against H2O2-induced oxidative stress injury in rat H9C2 cardiomyocytes. Methods: CCK8 method was used to detect the cell survival rate of H9C2 cardiomyocytes treated with different concentrations of H2O2. Normal cultured cells were used as the blank control group, and the cells were treated with 200 μmol/L H2O2 for 24 h. An oxidative stress injury model was constructed as the model group. The cells were pretreated with 1%, 0.1% and 0.01% camellia oil for 24 h, and then H2O2 was added for 24 h as the experimental group. The β-galactosidase senescence staining assay, mitochondrial membrane potential assay, EdU cell proliferation staining assay and scratch assay were used to observe the changes of cell senescence, mitochondrial membrane potential, proliferation, apoptosis and migration in each group. The superoxide dismutase (SOD) activity, lactate dehydrogenase (LDH) activity, and malondialdehyde (MDA) content of the cells in each group were detected by using the kit. Results: The cell viability of H9C2 cardiomyocytes treated with different concentrations of H2O2 was inhibited and positively correlated with the concentration of H2O2 (P<0.01). Compared with the blank control group, the positive rate of cell senescence, MDA content and LDH activity increased in the H2O2 model group (P<0.01);mitochondrial membrane potential, cellular value-added rate, migration rate and SOD activity decreased (P<0.01). Compared with the H2O2 model group, the positive rate of cellular senescence (P<0.01 or P<0.05), MDA content and LDH activity decreased (P< 0.01 or P<0.05);mitochondrial membrane potential increased, cell proliferation rate and migration rate increased (P<0.01 or P<0.05) in the experimental group. Conclusion: Camellia oil can significantly inhibit oxidative stress injury in H9C2 cells and exert cardiomyocyte protective effects.展开更多
Catalpol,an iridoid glucoside isolated from Rehmannia glutinosa,has gained attention due to its potential use in treating cardio-cerebrovascular diseases(CVDs).This extensive review delves into recent studies on catal...Catalpol,an iridoid glucoside isolated from Rehmannia glutinosa,has gained attention due to its potential use in treating cardio-cerebrovascular diseases(CVDs).This extensive review delves into recent studies on catalpol's protective properties in relation to various CVDs,such as atherosclerosis,myocardial ischemia,infarction,cardiac hypertrophy,and heart failure.The review also explores the compound's anti-oxidant,anti-inflammatory,and anti-apoptotic characteristics,emphasizing the role of vital signaling pathways,including PGC-1a/TERT,PI3K/Akt,AMPK,Nrf2/HO-1,estrogen receptor(ER),Nox4/NF-kB,and GRP78/PERK.The article discusses emerging findings on catalpol's ability to alleviate diabetic cardiovascular complications,thrombosis,and other cardiovascular-related conditions.Although clinical studies specifically addressing catalpol's impact on CVDs are scarce,the compound's established safety and well-tolerated nature suggest that it could be a valuable treatment alternative for CVD patients.Further investigation into catalpol and related iridoid derivatives may unveil new opportunities for devising natural and efficacious CVD therapies.展开更多
With the development of ordnance technology,the survival and safety of individual combatants in hightech warfare are under serious threat,and the Personal Protective Equipment(PPE),as an important guarantee to reduce ...With the development of ordnance technology,the survival and safety of individual combatants in hightech warfare are under serious threat,and the Personal Protective Equipment(PPE),as an important guarantee to reduce casualties and maintain military combat effectiveness,is widely developed.This paper systematically reviewed various PPE based on individual combat through literature research and comprehensive discussion,and introduced in detail the latest application progress of PPE in terms of material and technology from three aspects:individual integrated protection system,traditional protection equipment,and intelligent protection equipment,respectively,and discussed in depth the functional improvement and optimization status brought by advanced technology for PPE,focusing on the achievements of individual equipment technology application.Finally,the problems and technical bottlenecks in the development of PPE were analyzed and summarized,and the development trend of PPE were pointed out.The results of the review will provide a forward-looking reference for the current development of individual PPE,and are important guidance for the design and technological innovation of advanced equipment based on the future technological battlefield.展开更多
Parkinson's disease(PD)is the most frequent movement disorder and the second most prevalent age-related neurodegenerative disease(ND)worldwide.From the clinical point of view,it is characterized by severe motor co...Parkinson's disease(PD)is the most frequent movement disorder and the second most prevalent age-related neurodegenerative disease(ND)worldwide.From the clinical point of view,it is characterized by severe motor complications,including uncontrollable resting tremors,rigidity,bradykinesia,and postural instability.展开更多
Spinal cord injury is a serious disease of the central nervous system involving irreversible nerve injury and various organ system injuries.At present,no effective clinical treatment exists.As one of the artificial hi...Spinal cord injury is a serious disease of the central nervous system involving irreversible nerve injury and various organ system injuries.At present,no effective clinical treatment exists.As one of the artificial hibernation techniques,mild hypothermia has preliminarily confirmed its clinical effect on spinal cord injury.However,its technical defects and barriers,along with serious clinical side effects,restrict its clinical application for spinal cord injury.Artificial hibernation is a futureoriented disruptive technology for human life support.It involves endogenous hibernation inducers and hibernation-related central neuromodulation that activate particular neurons,reduce the central constant temperature setting point,disrupt the normal constant body temperature,make the body adapt"to the external cold environment,and reduce the physiological resistance to cold stimulation.Thus,studying the artificial hibernation mechanism may help develop new treatment strategies more suitable for clinical use than the cooling method of mild hypothermia technology.This review introduces artificial hibernation technologies,including mild hypothermia technology,hibernation inducers,and hibernation-related central neuromodulation technology.It summarizes the relevant research on hypothermia and hibernation for organ and nerve protection.These studies show that artificial hibernation technologies have therapeutic significance on nerve injury after spinal co rd injury through inflammatory inhibition,immunosuppression,oxidative defense,and possible central protection.It also promotes the repair and protection of res pirato ry and digestive,cardiovascular,locomoto r,urinary,and endocrine systems.This review provides new insights for the clinical treatment of nerve and multiple organ protection after spinal cord injury thanks to artificial hibernation.At present,artificial hibernation technology is not mature,and research fa ces various challenges.Neve rtheless,the effort is wo rthwhile for the future development of medicine.展开更多
Radiotherapy is a critical component of cancer care but can cause osteoporosis and pathological insufficiency fractures in surrounding and otherwise healthy bone.Presently,no effective countermeasure exists,and ionizi...Radiotherapy is a critical component of cancer care but can cause osteoporosis and pathological insufficiency fractures in surrounding and otherwise healthy bone.Presently,no effective countermeasure exists,and ionizing radiation-induced bone damage continues to be a substantial source of pain and morbidity.The purpose of this study was to investigate a small molecule aminopropyl carbazole named P7C3 as a novel radioprotective strategy.Our studies revealed that P7C3 repressed ionizing radiation(IR)-induced osteoclastic activity,inhibited adipogenesis,and promoted osteoblastogenesis and mineral deposition in vitro.We also demonstrated that rodents exposed to clinically equivalent hypofractionated levels of IR in vivo develop weakened,osteoporotic bone.However,the administration of P7C3 significantly inhibited osteoclastic activity,lipid formation and bone marrow adiposity and mitigated tissue loss such that bone maintained its area,architecture,and mechanical strength.Our findings revealed significant enhancement of cellular macromolecule metabolic processes,myeloid cell differentiation,and the proteins LRP-4,TAGLN,ILK,and Tollip,with downregulation of GDF-3,SH2B1,and CD200.These proteins are key in favoring osteoblast over adipogenic progenitor differentiation,cell matrix interactions,and shape and motility,facilitating inflammatory resolution,and suppressing osteoclastogenesis,potentially via Wnt/β-catenin signaling.A concern was whether P7C3 afforded similar protection to cancer cells.Preliminarily,and remarkably,at the same protective P7C3 dose,a significant reduction in triple-negative breast cancer and osteosarcoma cell metabolic activity was found in vitro.Together,these results indicate that P7C3 is a previously undiscovered key regulator of adipo-osteogenic progenitor lineage commitment and may serve as a novel multifunctional therapeutic strategy,leaving IR an effective clinical tool while diminishing the risk of adverse post-IR complications.Our data uncover a new approach for the prevention of radiation-induced bone damage,and further work is needed to investigate its ability to selectively drive cancer cell death.展开更多
Objective:To reveal the molecular mechanism underlying the compatibility of Salvia miltiorrhiza Bge(S.miltiorrhiza,Dan Shen)and C.tinctorius L.(C.tinctorius,Hong Hua)as an herb pair through network pharmacology and su...Objective:To reveal the molecular mechanism underlying the compatibility of Salvia miltiorrhiza Bge(S.miltiorrhiza,Dan Shen)and C.tinctorius L.(C.tinctorius,Hong Hua)as an herb pair through network pharmacology and subsequent experimental validation.Methods:Network pharmacology was applied to construct an active ingredient-efficacy target-disease protein network to reveal the unique regulation pattern of s.miltiorrhiza and C.tinctorius as herb pair.Molecular docking was used to verify the binding of the components of these herbs and their potential targets.An H9c2 glucose hypoxia model was used to evaluate the efficacy of the components and their synergistic effects,which were evaluated using the combination index.Western blot was performed to detect the protein expression of these targets.Results:Network pharmacology analysis revealed 5 pathways and 8 core targets of s.miltiorrhiza and C.tinctorius in myocardial protection.Five of the core targets were enriched in the hypoxia-inducible factor-1(HIF-1)signaling pathway.S.miltiorrhiza-C.tinctorius achieved vascular tone mainly by regulating the target genes of the HIF-1 pathway.As an upstream gene of the HIF-1 pathway,STAT3 can be activated by the active ingredients cryptotanshinone(Ctan),salvianolic acid B(Sal.B),and myricetin(Myric).Cell experiments revealed that Myric,Sal.B,and Ctan also exhibited synergistic myocardial protective activity.Molecular docking verified the strong binding of Myric,Sal.B,and Ctan to STAT3.Western blot further showed that the active ingredients synergistically upregulated the protein expressionof STAT3.Conclusion:The pharmacodynamic transmission analysis revealed that the active ingredients of S.miltiorrhiza and C.tinctorius can synergistically resist ischemia through various targets and pathways.This study provides a methodological reference for interpreting traditional Chinese medicine compatibility.展开更多
To clarify the characteristics of photoinhibition and the primary defense mechanisms of ephemeral plant leaves against photodestruction under high temperature stress,inhibitors and the technology to determine chloroph...To clarify the characteristics of photoinhibition and the primary defense mechanisms of ephemeral plant leaves against photodestruction under high temperature stress,inhibitors and the technology to determine chlorophyll fluorescence were used to explore the protective effects of D1 protein turnover and the lutein cycle in the high temperature stress of the leaves of three ephemeral plants.The results showed that the maximum light conversion efficiency(Fv/Fm)of the ephemeral plant leaves decreased,and the initial fluorescence(Fo)increased under 35℃±1℃ heat stress for 1-4 h or on sunny days in the summer.Both Fv/Fm and Fo could be recovered after 8 h of darkness or afternoon weakening of the external temperature.Streptomycin sulfate(SM)or dithiothreitol(DTT)accelerated the decrease of Fv/Fm and the photochemical quenching coefficient(qP)in the leaves of three ephemeral plants at high temperature,and the decrease was greater in the SM than in the DTT treatment.When the high temperature stress was prolonged,the Y(II)values of light energy distribution parameters of PSII decreased,and the Y(NPQ)and Y(NO)values increased gradually in all the treatment groups of the three ephemeral plants.The results showed that the leaves of the three ephemeral plants had their own highly advanced mechanisms to protect against photodamage,which inhibited the turnover of D1 protein and xanthophyll cycle.This can damage the PSII reaction center in the leaves of the three ephemeral plants under high temperature.The protective effect of D1 protein turnover on heat stress in Erodium oxyrrhynchum and Senecio subdentatus was greater than that of the lutein cycle,while the protective effect of lutein cycle was greater than that of D1 protein turnover in Heliotropium acutiflorum subjected to heat damage.展开更多
[Objectives]To observe the protective effects of Mongolian medicine Borantunggal on rats with chronic renal insufficiency.[Methods]Male Wister rats were gavaged with 50 mg/kg/d adenine for 12 consecutive weeks,and wer...[Objectives]To observe the protective effects of Mongolian medicine Borantunggal on rats with chronic renal insufficiency.[Methods]Male Wister rats were gavaged with 50 mg/kg/d adenine for 12 consecutive weeks,and were intervened with positive control drug Niaoduqing and three groups of different doses of Mongolian medicine Borantunggal.The rats general state,such as body posture,hair color,activity status,renal function,thyroid gland,adrenal gland,and gonadal hormone levels,expression levels of inflammatory mediators,α-smooth muscle actin(α-SMA)and nuclear factor-κB(P65)in renal tissue,and histopathological changes of rat kidney were observed before and after treatment.[Results]The recovery of the general state of rats with chronic renal insufficiency in the low dose group after intervention with Mongolian medicine Borantunggal was the most obvious.Compared with the model group,the level of CRE in the low dose Mongolian medicine group decreased,and the difference was statistically significant(P<0.05).Compared with the normal group,the 24-h urinary protein in the low dose Mongolian medicine group had a declining trend,but the difference was not statistically significant(P>0.05).The urea level in low,medium and high dose Mongolian medicine groups showed a declining trend,and the effect of low dose Mongolian medicine was better.Compared with the model group,the feed intake of the low dose Mongolian medicine group had an increasing trend,while P and TCHO also had a declining trend.Compared with the model group,the levels of LH and COR in the low,medium and high dose Mongolian medicine groups decreased significantly,and the difference was statistically significant(P<0.05).The levels of T,T3 and T4 were significantly increased,the difference was statistically significant(P<0.05),and the effect of low dose Mongolian medicine was better.Compared with the model group,the levels of IL-6,TNF-αand HIF-1 in the low,medium and high dose Mongolian medicine groups were significantly reduced,and the difference was statistically significant(P<0.05).The levels of TGF-β1 and Ang II in the low dose Mongolian medicine group were significantly reduced,and the difference was statistically significant(P<0.05).The level of TGF-β1 in the medium and high dose Mongolian medicine groups decreased,and the difference was statistically significant(P<0.05).The expression of NF-κB P65 andα-SMA proteins in the low dose Mongolian medicine group showed a declining trend,which was better than Niaoduqing.[Conclusions]Mongolian medicine Borantunggal has significant protective and preventive effects on rats with adenine-induced chronic renal insufficiency.In particular,the dose of 0.31 kg/d had the most significant protective effect.Its action mechanism may be related to regulating hormone levels in the body,improving renal function,reducing renal inflammatory response,reducing the"three highs"in the kidney,and inhibiting renal tubular epithelial cell-to-mesenchymal transition and deposition of extracellular matrix(ECM).展开更多
基金supported by the National Natural Science Foundation of China,No.81801208(to LSO)Science and Technology Program of Guangzhou,No.202102080053(to YF)+1 种基金Science and Technology Program of Guangzhou,No.202007030001(to YMT)Science and Technology Planning Project of Guangzhou,No.202102020027(to ZL)。
文摘MicroRNAs(miRNAs)play an important regulatory role in neuronal growth and development.Different mi RNAs target different genes to protect neurons in different ways,such as by avoiding apoptosis,preventing degeneration mediated by conditional mediators,preventing neuronal loss,weakening certain neurotoxic mechanisms,avoiding damage to neurons,and reducing inflammatory damage to them.The high expression of mi RNAs in the brain has significantly facilitated their development as protective targets for therapy,including neuroprotection and neuronal recovery.mi RNA is indispensable to the growth and development of neurons,and in turn,is beneficial for the development of the brain and checking the progression of various diseases of the nervous system.It can thus be used as an important therapeutic target for models of various diseases.This review provides an introduction to the protective effects of mi RNA on neurons in case of different diseases or damage models,and then provides reference values and reflections on the relevant treatments for the benefit of future research in the area.
基金Sponsored by Social Science Planning Project of Chongqing City(2022NDYB83)Postgraduate Innovative Research Project of Chongqing City(CYS22418)。
文摘Starting from the reality of protective renovation of the historical environment of traffic cultural heritage,this paper discusses its necessity from the role and value of protective renovation of historical environment on overall protection of traffic cultural heritage and contemporary value exploration.By analyzing the current research status of traffic history,protection theories and methods of historical environment,cultural routes,linear cultural landscape and heritage corridors and other theoretical methods,as well as the effectiveness of digital protection and other technical approaches,this paper demonstrates the theoretical basis and feasible technical approaches for protective renovation of the historical environment of traffic cultural heritage.Moreover,it is suggested to construct the historical environment evaluation system of traffic cultural heritage and form a systematic design process of protective renovation.
文摘The paper intfoduces a PC-DSP based real-time digital simulator which is portable in size and aimed at the closed-loop testing of various types of protective relays for their design and application. The simulator can be widely used in not only concerning utilities but also manufacturers and research / certification institutes because of its many functions. The hardware architecture and software implementation of the simulator are described. The main features and functions of the simulator are also
文摘This paper systematically analyzes the transfer characteristics of the Rogowski-coil Current Transformer and its effect on protective relaying through theoretical analysis, experiments and simulations. The frequency characteristics and transient characteristics of Rogowski transducer and Rogowski-coil Current Transformer are deeply analyzed based on the physical structure of the transformer.?It is revealed that broad bandwidth of the transformer can improve the performance of protective relaying, and the bandwidth is determined mainly by the parameters of the Rogowski transducer and signal processing circuits. It is also discovered that the measurement errors of transient current mainly depend on the abilities for the current transformer to reproduce an accurate replica of the decaying dc components, which is mainly decided by the decay time constant of the aperiodic component of transient current and the parameters of the integral unit. Finally, some measures are proposed for the performance improvement of Rogowski-coil Current Transformer to meet the requirements of protective relaying system in terms of structural design and testing standards.
文摘The purpose of this study was to investigate the protective effect of low dose radiation on TCE induced oxidative damage in rats. The oxidative damage of both liver and kidney was assessed by serum alkaline phosphatase (ALP), Gamma Glutamyl Trans-Peptidase (GGTP), Alanine and Aspartate Amino Transferase (ALT & AST) activities in addition concentrations of cholesterol, high density lipoprotein-cholesterol (HDL-c), low density lipoprotein-cholesterol (LDL-c), Triacyglycerols (TGs), urea and creatinine were analyzed. Liver lipid peroxidation (MDA), Nitric Oxide (NO), reduced glutathione (GSH) levels, and activities of both Super-Oxide Dismutase (SOD) and Glutathione Peroxidase (GSH-Px) were measured. Results: TCE administration increase serum ALP, GGTP, ALT, AST activities, cholesterol, triacylglycerols, LDL-c, urea and creatinine concentrations, besides liver MDA and NO, whereas it decreased SOD, GSH-Px activities, GSH level in liver, HDL-c in serum. Low dose of gamma rays (0.5 Gy) exposure significantly improved lipid peroxidation and oxidative injury induced by TCE. Conclusion: The study indicates that treatment with low dose of gamma rays ameliorate harmful effects induced by TCE taking in consideration the effect of gamma radiation as a stimulant of radical detoxification.
文摘Protection and renewal of historic blocks is not only protection of physical spaces,continuation of intangible cultures,but also management measures of the internal social affairs in the blocks.Taking Chuancheng Street Historic Block in Handan City for example,this paper investigated current situation of the block,applied the organic renewal theory in the block renovation,and put forward relevant space,population and management strategies,so as to provide references for the protective renovation of historic blocks.
文摘The coordination correctness of Nuclear power plant current transformer (CT)/ voltage transformer (PT) polarity and relay protection is often verified through the dynamic test on the unit no load / load operating conditions. This paper proposes a test method to prevent and circumvent the failure of the dynamic test abnormality caused by the static power test before the plant power is applied and the whole group is started. Reduce the dynamic test workload and test difficulty, to ensure that the dynamic test safety risk control and control in the state.
基金provided by the National Natural Science Foundation of China(Grant No.41977233)the key projects of the Science and Technology Department of Sichuan Province(Grant No.2020YJ0360)+1 种基金Sichuan Education and Teaching Reform project(Grant No.JG2021-1069)the opening project of Sichuan province university key Laboratory(Grant No.SC_FQWLY-2020-Z-02)。
文摘The baffle effectively slowed down debris flow velocity,reduced its kinetic energy,and significantly shortened the distance of debris flow movement.Consequently,they are widely used for protection against natural hazards such as landslides and mudslides.This study,based on the threedimensional DEM(Discrete Element Method),investigated the impact of different baffle positions on debris flow protection.Debris flow velocity and kinetic energy variations were studied through single-factor experiments.Suitable baffle positions were preliminarily selected by analyzing the influence of the first-row baffle position on the impact force and accumulation mass of debris flow.Subsequently,based on the selected baffle positions and four factors influencing the effectiveness of baffle protection(baffle position(P),baffle height(h),row spacing(S_(r)),and angle of transit area(α)),an orthogonal design was employed to further explore the optimal arrangement of baffles.The research results indicate that the use of a baffle structure could effectively slow down the motion velocity of debris flows and dissipate their energy.When the baffle is placed in the transit area,the impact force on the first-row baffle is greater than that when the baffle is placed in the deposition area.Similarly,when the baffle is placed in the transit area,the obstruction effect on debris flow mass is also greater than that when the baffle is placed in the deposition area.Through orthogonal experimental range analysis,when the impact on the first row of baffles is used as the evaluation criterion,the importance of each influencing factor is ranked asα>P>S_(r)>h.When the mass of debris flow behind the baffle is regarded as the evaluation criterion,the rank is changed to P>α>S_(r)>h.The experimental simulation results show that the optimal baffle arrangement is:P_(5),S_(r)=16,α=35°,h=9.
文摘Original statement in the caption of Fig.5:Fig.5.JinMaiTong(JMT)treatment restored the perturbed central carbohydrate metabolism in the circulation and sciatic nerve of diabetic peripheral neuropathy(DPN)rats.Dash line arrows indicate the direct metabolic reactions,and solid line arrows indicate the indirect reactions.*P<0.05 and**P<0.01.ns:no significant difference.CON:control;TCA:tricarboxylic acid cycle;ADP:adenosine diphosphate:ATP:adenosine triphosphate;GDP:guanosine diphosphate;GTP:guanosine triphosphate.
基金This work was funded by Chongqing Municipal Technology Innovation and Application Development Program(cstc2020jscx-gksb0001)Yunnan Academician(Expert)Workstation Project(202105AF150073).
文摘Fritillaria taipaiensis P.Y.Li is a widely used medicinal herb in treating pulmonary diseases.In recent years,its wild resources have become scarce,and the demand for efficient artificial cultivation has significantly increased.This article is the first to apply phosphate solubilizing bacteria isolated from the rhizosphere soil of F.taipaiensis P.Y.Li to the cultivation process of F.taipaiensis P.Y.Li.The aim is to identify suitable reference strains for the artificial cultivation and industrial development of F.taipaiensis P.Y.Li by examining the effects of various phosphate solubilizing bacteria and their combinations on photosynthesis,physiological and biochemical properties,and gene expression related to the protective enzyme system in F.taipaiensis P.Y.Li.The experiment,conducted in pots at room temperature,included a control group(CK)and groups inoculated with inorganic phosphorussolubilizing bacteria:W1(Bacillus cereus),W2(Serratia plymuthica),W12(Bacillus cereus and Serratia plymuthica),and groups inoculated with organophosphorus-solubilizing bacteria:Y1(Bacillus cereus),Y2(Bacillus cereus),Y12(Bacillus cereus and Bacillus cereus),totaling seven groups.Compared to CK,most growth indices in the bacterial addition groups showed significant differences,with W12 achieving the highest values in all indices except the leaf area index.The content of photosynthetic pigments,photosynthetic parameters,and osmoregulatory substances increased variably in each bacterial treatment group.W12 exhibited the highest content of chlorophyll a and soluble protein,while W1 had the highest free proline content.The activities of peroxidase(POD),superoxide dismutase(SOD),and catalase(CAT)in all inoculated groups were higher than in CK,with significant changes in SOD and CAT activities.The malondialdehyde(MDA)content in all inoculated groups was lower than in CK,with Y12 being the lowest,at approximately 30%of CK.Gene expression corresponding to these three enzymes also increased variably,with POD expression in Y2 being the highest at 2.73 times that of CK.SOD and CAT expression in Y12 were the highest,at 1.84 and 4.39 times that of CK,respectively.These results indicate that inoculating phosphate solubilizing bacteria can enhance the growth of F.taipaiensis P.Y.Li,with the mixed inoculation groups W12 and Y12 demonstrating superior effects.This lays a theoretical foundation for selecting bacterial fertilizers in the cultivation process of F.taipaiensis P.Y.Li.
文摘BACKGROUND Dexmedetomidine and propofol are two sedatives used for long-term sedation.It remains unclear whether dexmedetomidine provides superior cerebral protection for patients undergoing long-term mechanical ventilation.AIM To compare the neuroprotective effects of dexmedetomidine and propofol for sedation during prolonged mechanical ventilation in patients without brain injury.METHODS Patients who underwent mechanical ventilation for>72 h were randomly assigned to receive sedation with dexmedetomidine or propofol.The Richmond Agitation and Sedation Scale(RASS)was used to evaluate sedation effects,with a target range of-3 to 0.The primary outcomes were serum levels of S100-βand neuron-specific enolase(NSE)every 24 h.The secondary outcomes were remifentanil dosage,the proportion of patients requiring rescue sedation,and the time and frequency of RASS scores within the target range.RESULTS A total of 52 and 63 patients were allocated to the dexmedetomidine group and propofol group,respectively.Baseline data were comparable between groups.No significant differences were identified between groups within the median duration of study drug infusion[52.0(IQR:36.0-73.5)h vs 53.0(IQR:37.0-72.0)h,P=0.958],the median dose of remifentanil[4.5(IQR:4.0-5.0)μg/kg/h vs 4.6(IQR:4.0-5.0)μg/kg/h,P=0.395],the median percentage of time in the target RASS range without rescue sedation[85.6%(IQR:65.8%-96.6%)vs 86.7%(IQR:72.3%-95.3),P=0.592],and the median frequency within the target RASS range without rescue sedation[72.2%(60.8%-91.7%)vs 73.3%(60.0%-100.0%),P=0.880].The proportion of patients in the dexmedetomidine group who required rescue sedation was higher than in the propofol group with statistical significance(69.2%vs 50.8%,P=0.045).Serum S100-βand NSE levels in the propofol group were higher than in the dexmedetomidine group with statistical significance during the first six and five days of mechanical ventilation,respectively(all P<0.05).CONCLUSION Dexmedetomidine demonstrated stronger protective effects on the brain compared to propofol for long-term mechanical ventilation in patients without brain injury.
基金National Natural Science Foundation of China(No.82160597)Guangxi Natural Science Foundation Project(No.2020GXNSFAA159148)。
文摘Objective: To explore the protective effect of camellia oil against H2O2-induced oxidative stress injury in rat H9C2 cardiomyocytes. Methods: CCK8 method was used to detect the cell survival rate of H9C2 cardiomyocytes treated with different concentrations of H2O2. Normal cultured cells were used as the blank control group, and the cells were treated with 200 μmol/L H2O2 for 24 h. An oxidative stress injury model was constructed as the model group. The cells were pretreated with 1%, 0.1% and 0.01% camellia oil for 24 h, and then H2O2 was added for 24 h as the experimental group. The β-galactosidase senescence staining assay, mitochondrial membrane potential assay, EdU cell proliferation staining assay and scratch assay were used to observe the changes of cell senescence, mitochondrial membrane potential, proliferation, apoptosis and migration in each group. The superoxide dismutase (SOD) activity, lactate dehydrogenase (LDH) activity, and malondialdehyde (MDA) content of the cells in each group were detected by using the kit. Results: The cell viability of H9C2 cardiomyocytes treated with different concentrations of H2O2 was inhibited and positively correlated with the concentration of H2O2 (P<0.01). Compared with the blank control group, the positive rate of cell senescence, MDA content and LDH activity increased in the H2O2 model group (P<0.01);mitochondrial membrane potential, cellular value-added rate, migration rate and SOD activity decreased (P<0.01). Compared with the H2O2 model group, the positive rate of cellular senescence (P<0.01 or P<0.05), MDA content and LDH activity decreased (P< 0.01 or P<0.05);mitochondrial membrane potential increased, cell proliferation rate and migration rate increased (P<0.01 or P<0.05) in the experimental group. Conclusion: Camellia oil can significantly inhibit oxidative stress injury in H9C2 cells and exert cardiomyocyte protective effects.
基金supported by the National Natural Science Foundation of China(Grant Nos:.82070356 and 81770337)the Key Project of Hunan Provincial Science and Technology Innovation,China(Grant No.:2020SK1013)the Hunan Provincial Natural Science Foundation of China(Grant No.:2021JJ30033).
文摘Catalpol,an iridoid glucoside isolated from Rehmannia glutinosa,has gained attention due to its potential use in treating cardio-cerebrovascular diseases(CVDs).This extensive review delves into recent studies on catalpol's protective properties in relation to various CVDs,such as atherosclerosis,myocardial ischemia,infarction,cardiac hypertrophy,and heart failure.The review also explores the compound's anti-oxidant,anti-inflammatory,and anti-apoptotic characteristics,emphasizing the role of vital signaling pathways,including PGC-1a/TERT,PI3K/Akt,AMPK,Nrf2/HO-1,estrogen receptor(ER),Nox4/NF-kB,and GRP78/PERK.The article discusses emerging findings on catalpol's ability to alleviate diabetic cardiovascular complications,thrombosis,and other cardiovascular-related conditions.Although clinical studies specifically addressing catalpol's impact on CVDs are scarce,the compound's established safety and well-tolerated nature suggest that it could be a valuable treatment alternative for CVD patients.Further investigation into catalpol and related iridoid derivatives may unveil new opportunities for devising natural and efficacious CVD therapies.
基金supported by the National Outstanding Youth Science Fund Project of National Natural Science Foundation of China(Projects No.52202012)the National Natural Science Foundation of China(Projects No.51834007)。
文摘With the development of ordnance technology,the survival and safety of individual combatants in hightech warfare are under serious threat,and the Personal Protective Equipment(PPE),as an important guarantee to reduce casualties and maintain military combat effectiveness,is widely developed.This paper systematically reviewed various PPE based on individual combat through literature research and comprehensive discussion,and introduced in detail the latest application progress of PPE in terms of material and technology from three aspects:individual integrated protection system,traditional protection equipment,and intelligent protection equipment,respectively,and discussed in depth the functional improvement and optimization status brought by advanced technology for PPE,focusing on the achievements of individual equipment technology application.Finally,the problems and technical bottlenecks in the development of PPE were analyzed and summarized,and the development trend of PPE were pointed out.The results of the review will provide a forward-looking reference for the current development of individual PPE,and are important guidance for the design and technological innovation of advanced equipment based on the future technological battlefield.
基金supported by Institute of Translational Pharmacology,National Research Council(IFT-CNR),Projects DSB.AD007.088 to AS。
文摘Parkinson's disease(PD)is the most frequent movement disorder and the second most prevalent age-related neurodegenerative disease(ND)worldwide.From the clinical point of view,it is characterized by severe motor complications,including uncontrollable resting tremors,rigidity,bradykinesia,and postural instability.
基金supported by the Key Projects of the National Natural Science Foundation of China,No.11932013(to XC)Key Military Logistics Research Projects,No.B WJ21J002(to XC)+4 种基金the Key projects of the Special Zone for National Defence Innovation,No.21-163-12-ZT006002-13(to XC)the National Nature Science Foundation of China No.82272255(to XC)the National Defense Science and Technology Outstanding Youth Science Fund Program,No.2021-JCIQ-ZQ-035(to XC)the Scientific Research Innovation Team Project of Armed Police Characteristic Medical Center,No.KYCXTD0104(to ZL)the National Natural Science Foundation of China Youth Fund,No.82004467(to BC)。
文摘Spinal cord injury is a serious disease of the central nervous system involving irreversible nerve injury and various organ system injuries.At present,no effective clinical treatment exists.As one of the artificial hibernation techniques,mild hypothermia has preliminarily confirmed its clinical effect on spinal cord injury.However,its technical defects and barriers,along with serious clinical side effects,restrict its clinical application for spinal cord injury.Artificial hibernation is a futureoriented disruptive technology for human life support.It involves endogenous hibernation inducers and hibernation-related central neuromodulation that activate particular neurons,reduce the central constant temperature setting point,disrupt the normal constant body temperature,make the body adapt"to the external cold environment,and reduce the physiological resistance to cold stimulation.Thus,studying the artificial hibernation mechanism may help develop new treatment strategies more suitable for clinical use than the cooling method of mild hypothermia technology.This review introduces artificial hibernation technologies,including mild hypothermia technology,hibernation inducers,and hibernation-related central neuromodulation technology.It summarizes the relevant research on hypothermia and hibernation for organ and nerve protection.These studies show that artificial hibernation technologies have therapeutic significance on nerve injury after spinal co rd injury through inflammatory inhibition,immunosuppression,oxidative defense,and possible central protection.It also promotes the repair and protection of res pirato ry and digestive,cardiovascular,locomoto r,urinary,and endocrine systems.This review provides new insights for the clinical treatment of nerve and multiple organ protection after spinal cord injury thanks to artificial hibernation.At present,artificial hibernation technology is not mature,and research fa ces various challenges.Neve rtheless,the effort is wo rthwhile for the future development of medicine.
基金funded by the Department of Internal Medicine,College of Medicine,University of Central Florida (Award#2508074)supported by the National Aeronautics and Space Administration [grant No.80NSSC21M0309]issued through the NASA Office of STEM Engagement。
文摘Radiotherapy is a critical component of cancer care but can cause osteoporosis and pathological insufficiency fractures in surrounding and otherwise healthy bone.Presently,no effective countermeasure exists,and ionizing radiation-induced bone damage continues to be a substantial source of pain and morbidity.The purpose of this study was to investigate a small molecule aminopropyl carbazole named P7C3 as a novel radioprotective strategy.Our studies revealed that P7C3 repressed ionizing radiation(IR)-induced osteoclastic activity,inhibited adipogenesis,and promoted osteoblastogenesis and mineral deposition in vitro.We also demonstrated that rodents exposed to clinically equivalent hypofractionated levels of IR in vivo develop weakened,osteoporotic bone.However,the administration of P7C3 significantly inhibited osteoclastic activity,lipid formation and bone marrow adiposity and mitigated tissue loss such that bone maintained its area,architecture,and mechanical strength.Our findings revealed significant enhancement of cellular macromolecule metabolic processes,myeloid cell differentiation,and the proteins LRP-4,TAGLN,ILK,and Tollip,with downregulation of GDF-3,SH2B1,and CD200.These proteins are key in favoring osteoblast over adipogenic progenitor differentiation,cell matrix interactions,and shape and motility,facilitating inflammatory resolution,and suppressing osteoclastogenesis,potentially via Wnt/β-catenin signaling.A concern was whether P7C3 afforded similar protection to cancer cells.Preliminarily,and remarkably,at the same protective P7C3 dose,a significant reduction in triple-negative breast cancer and osteosarcoma cell metabolic activity was found in vitro.Together,these results indicate that P7C3 is a previously undiscovered key regulator of adipo-osteogenic progenitor lineage commitment and may serve as a novel multifunctional therapeutic strategy,leaving IR an effective clinical tool while diminishing the risk of adverse post-IR complications.Our data uncover a new approach for the prevention of radiation-induced bone damage,and further work is needed to investigate its ability to selectively drive cancer cell death.
基金supported by the National Natural Science Foundation of China(81703947)the Fundamental Research Funds for the Central Universities(2019-JYB-XJSJJ-011).
文摘Objective:To reveal the molecular mechanism underlying the compatibility of Salvia miltiorrhiza Bge(S.miltiorrhiza,Dan Shen)and C.tinctorius L.(C.tinctorius,Hong Hua)as an herb pair through network pharmacology and subsequent experimental validation.Methods:Network pharmacology was applied to construct an active ingredient-efficacy target-disease protein network to reveal the unique regulation pattern of s.miltiorrhiza and C.tinctorius as herb pair.Molecular docking was used to verify the binding of the components of these herbs and their potential targets.An H9c2 glucose hypoxia model was used to evaluate the efficacy of the components and their synergistic effects,which were evaluated using the combination index.Western blot was performed to detect the protein expression of these targets.Results:Network pharmacology analysis revealed 5 pathways and 8 core targets of s.miltiorrhiza and C.tinctorius in myocardial protection.Five of the core targets were enriched in the hypoxia-inducible factor-1(HIF-1)signaling pathway.S.miltiorrhiza-C.tinctorius achieved vascular tone mainly by regulating the target genes of the HIF-1 pathway.As an upstream gene of the HIF-1 pathway,STAT3 can be activated by the active ingredients cryptotanshinone(Ctan),salvianolic acid B(Sal.B),and myricetin(Myric).Cell experiments revealed that Myric,Sal.B,and Ctan also exhibited synergistic myocardial protective activity.Molecular docking verified the strong binding of Myric,Sal.B,and Ctan to STAT3.Western blot further showed that the active ingredients synergistically upregulated the protein expressionof STAT3.Conclusion:The pharmacodynamic transmission analysis revealed that the active ingredients of S.miltiorrhiza and C.tinctorius can synergistically resist ischemia through various targets and pathways.This study provides a methodological reference for interpreting traditional Chinese medicine compatibility.
基金This work was supported by the Open Foundation of the State Key Laboratory of Desert and Oasis Ecology(KH0054).
文摘To clarify the characteristics of photoinhibition and the primary defense mechanisms of ephemeral plant leaves against photodestruction under high temperature stress,inhibitors and the technology to determine chlorophyll fluorescence were used to explore the protective effects of D1 protein turnover and the lutein cycle in the high temperature stress of the leaves of three ephemeral plants.The results showed that the maximum light conversion efficiency(Fv/Fm)of the ephemeral plant leaves decreased,and the initial fluorescence(Fo)increased under 35℃±1℃ heat stress for 1-4 h or on sunny days in the summer.Both Fv/Fm and Fo could be recovered after 8 h of darkness or afternoon weakening of the external temperature.Streptomycin sulfate(SM)or dithiothreitol(DTT)accelerated the decrease of Fv/Fm and the photochemical quenching coefficient(qP)in the leaves of three ephemeral plants at high temperature,and the decrease was greater in the SM than in the DTT treatment.When the high temperature stress was prolonged,the Y(II)values of light energy distribution parameters of PSII decreased,and the Y(NPQ)and Y(NO)values increased gradually in all the treatment groups of the three ephemeral plants.The results showed that the leaves of the three ephemeral plants had their own highly advanced mechanisms to protect against photodamage,which inhibited the turnover of D1 protein and xanthophyll cycle.This can damage the PSII reaction center in the leaves of the three ephemeral plants under high temperature.The protective effect of D1 protein turnover on heat stress in Erodium oxyrrhynchum and Senecio subdentatus was greater than that of the lutein cycle,while the protective effect of lutein cycle was greater than that of D1 protein turnover in Heliotropium acutiflorum subjected to heat damage.
基金Supported by Natural Science Foundation of Inner Mongolia Autonomous Region(2019MS08015).
文摘[Objectives]To observe the protective effects of Mongolian medicine Borantunggal on rats with chronic renal insufficiency.[Methods]Male Wister rats were gavaged with 50 mg/kg/d adenine for 12 consecutive weeks,and were intervened with positive control drug Niaoduqing and three groups of different doses of Mongolian medicine Borantunggal.The rats general state,such as body posture,hair color,activity status,renal function,thyroid gland,adrenal gland,and gonadal hormone levels,expression levels of inflammatory mediators,α-smooth muscle actin(α-SMA)and nuclear factor-κB(P65)in renal tissue,and histopathological changes of rat kidney were observed before and after treatment.[Results]The recovery of the general state of rats with chronic renal insufficiency in the low dose group after intervention with Mongolian medicine Borantunggal was the most obvious.Compared with the model group,the level of CRE in the low dose Mongolian medicine group decreased,and the difference was statistically significant(P<0.05).Compared with the normal group,the 24-h urinary protein in the low dose Mongolian medicine group had a declining trend,but the difference was not statistically significant(P>0.05).The urea level in low,medium and high dose Mongolian medicine groups showed a declining trend,and the effect of low dose Mongolian medicine was better.Compared with the model group,the feed intake of the low dose Mongolian medicine group had an increasing trend,while P and TCHO also had a declining trend.Compared with the model group,the levels of LH and COR in the low,medium and high dose Mongolian medicine groups decreased significantly,and the difference was statistically significant(P<0.05).The levels of T,T3 and T4 were significantly increased,the difference was statistically significant(P<0.05),and the effect of low dose Mongolian medicine was better.Compared with the model group,the levels of IL-6,TNF-αand HIF-1 in the low,medium and high dose Mongolian medicine groups were significantly reduced,and the difference was statistically significant(P<0.05).The levels of TGF-β1 and Ang II in the low dose Mongolian medicine group were significantly reduced,and the difference was statistically significant(P<0.05).The level of TGF-β1 in the medium and high dose Mongolian medicine groups decreased,and the difference was statistically significant(P<0.05).The expression of NF-κB P65 andα-SMA proteins in the low dose Mongolian medicine group showed a declining trend,which was better than Niaoduqing.[Conclusions]Mongolian medicine Borantunggal has significant protective and preventive effects on rats with adenine-induced chronic renal insufficiency.In particular,the dose of 0.31 kg/d had the most significant protective effect.Its action mechanism may be related to regulating hormone levels in the body,improving renal function,reducing renal inflammatory response,reducing the"three highs"in the kidney,and inhibiting renal tubular epithelial cell-to-mesenchymal transition and deposition of extracellular matrix(ECM).