Thymoquinone affects hypoxia-inducible factor-1αexpression in pancreatic cancer cells via HSP90 and PI3K/AKT/mTOR pathways

BACKGROUND Pancreatic cancer(PC)is associated with some of the worst prognoses of all major cancers.Thymoquinone(TQ)has a long history in traditional medical practice and is known for its anti-cancer,anti-inflammatory,anti-fibrosis and antioxidant pharmacological activities.Recent studies on hypoxia-inducible factor-1α(HIF-1α)and PC have shown that HIF-1αaffects the occurrence and development of PC in many aspects.In addition,TQ could inhibit the development of renal cancer by decreasing the expression of HIF-1α.Therefore,we speculate whether TQ affects HIF-1αexpression in PC cells and explore the mechanism.AIM To elucidate the effect of TQ in PC cells and the regulatory mechanism of HIF-1αexpression.METHODS Cell counting kit-8 assay,Transwell assay and flow cytometry were performed to detect the effects of TQ on the proliferative activity,migration and invasion ability and apoptosis of PANC-1 cells and normal pancreatic duct epithelial(hTERTHPNE)cells.Quantitative real-time polymerase chain reaction and western blot assay were performed to detect the expression of HIF-1αmRNA and protein in PC cells.The effects of TQ on the HIF-1αprotein initial expression pathway and ubiquitination degradation in PANC-1 cells were examined by western blot assay and co-immunoprecipitation.RESULTS TQ significantly inhibited proliferative activity,migration,and invasion ability and promoted apoptosis of PANC-1 cells;however,no significant effects on hTERT-HPNE cells were observed.TQ significantly reduced the mRNA and protein expression levels of HIF-1αin PANC-1,AsPC-1,and BxPC-3 cells.TQ significantly inhibited the expression of the HIF-1αinitial expression pathway(PI3K/AKT/mTOR)related proteins,and promoted the ubiquitination degradation of the HIF-1αprotein in PANC-1 cells.TQ had no effect on the hydroxylation and von Hippel Lindau protein mediated ubiquitination degradation of the HIF-1αprotein but affected the stability of the HIF-1αprotein by inhibiting the interaction between HIF-1αand HSP90,thus promoting its ubiquitination degradation.CONCLUSION The regulatory mechanism of TQ on HIF-1αprotein expression in PC cells was mainly to promote the ubiquitination degradation of the HIF-1αprotein by inhibiting the interaction between HIF-1αand HSP90;Secondly,TQ reduced the initial expression of HIF-1αprotein by inhibiting the PI3K/AKT/mTOR pathway.

Prognostic role of the stromal cell derived factor-1 in patients with hepatitis B virus-related acute-on-chronic liver failure

BACKGROUND Stromal cell derived factor-1(SDF-1)plays a pivotal role in the recruitment of stem cells to injured livers.However,the changes of SDF-l in patients with hepatitis B virus(HBV)-related acute-on-chronic liver failure(ACLF)have yet to be elucidated.AIM To study the SDF-1 changes in patients with HBV-related ACLF.METHODS 30 patients with HBV-related ACLF,27 patients with chronic hepatitis B and 20 healthy individuals are involved in our study.The SDF-l mRNA expression in liver tissue was detected by quantitative real-time polymerase chain reaction.Immunohistochemical staining was performed to illustrate the expression of SDFl,CXC receptor 4(CXCR4)and Ki67.The serum SDF-l concentrations were also detected by enzyme-linked immunosorbent assays.RESULTS The expression of SDF-1 mRNA from ACLF patients was remarkably higher than that from other patients(both P<0.05).The expression of SDF-l,CXCR4 and Ki67 from ACLF were the highest among the three groups(all P<0.01).The serum SDF-l levels in ACLF patients were significantly lower than that in other patients(both P<0.01).Moreover,in ACLF patients,the serum SDF-1 Levels were positively correlated with serum total bilirubin and international normalized ratio.In addition,the serum SDF-l levels in survival were significantly lower compared with the non-survivals(P<0.05).The area under the curve for the serum SDF-1 level in predicting 28-d mortality was 0.722(P<0.05).CONCLUSION This study provides the SDF-1 changes in patients with HBV-related ACLF.The SDF-1 Level at admission may serve as a promising prognostic marker for predicting short-term prognosis.

Transforming growth factor-β1 and vascular endothelial growth factor levels in senile acute myeloid leukemia and correlation with prognosis

BACKGROUND Acute myeloid leukemia(AML)is a disease in which immature hematopoietic cells accumulate in the bone marrow and continuously expand,inhibiting hematopoiesis.The treatment and prognosis of this disease have always been unsatisfactory.AIM To investigate the correlation between vascular endothelial growth factor(VEGF)and transforming growth factor-β1(TGFβ1)expression and prognosis in older adults with AML.METHODS This study enrolled 80 patients with AML(AML group),including 36 with complete response(AML-CR),23 with partial response(AML-PR),and 21 with no response(AML-NR).The expression levels of VEGF and TGFβ1 were detected by reverse transcription polymerase chain reaction in bone marrow mononuclear cells isolated from 56 healthy controls.Kaplan-Meier analysis was performed to assess overall survival(OS)and progression-or disease-free survival(DFS).Prognostic risk factors were analyzed using a Cox proportional hazards model.RESULTS The AML group showed a VEGF level of 2.68±0.16.VEGF expression was lower in patients with AML-CR than those with AML-PR or AML-NR(P<0.05).TGFβ1 expression in the AML group was 0.33±0.05.Patients with AML-CR showed a higher TGFβ1 expression than those with AML-PR or AML-NR(P<0.05).VEGF and TGFβ1 expression in patients with AML was significantly correlated with the counts of leukocytes,platelets,hemoglobin,and peripheral blood immature cells(P<0.05);Kaplan-Meier survival analysis revealed that patients with high TGFβ1 expression had better OS and DFS than those with low TGFβ1 expression(P<0.05),whereas patients with low VEGF levels showed better OS and DFS than those with high VEGF levels(P<0.05).VEGF,TGFβ1,and platelet count were identified by the Cox proportional hazards model as independent risk factors for OS(P<0.05),while VEGF,TGFβ1,and white blood cell count were independent risk factors for DFS(P<0.05).CONCLUSION Decreased VEGF expression and increased TGFβ1 expression in patients with AML provide valuable references for determining and individualizing clinical treatment strategies.

Silencing of Jumonji domain-containing 1C inhibits the osteogenic differentiation of bone marrow mesenchymal stem cells via nuclear factor-κB signaling

BACKGROUND Osteoporosis is a common metabolic bone disorder induced by an imbalance between osteoclastic activity and osteogenic activity.During osteoporosis,bone mesenchymal stem cells(BMSCs)exhibit an increased ability to differentiate into adipocytes and a decreased ability to differentiate into osteoblasts,resulting in bone loss.Jumonji domain-containing 1C(JMJD1C)has been demonstrated to suppress osteoclastogenesis.AIM To examine the effect of JMJD1C on the osteogenesis of BMSCs and the potential underlying mechanism.METHODS BMSCs were isolated from mouse bone marrow tissues.Oil Red O staining,Alizarin red staining,alkaline phosphatase staining and the expression of adipo-genic and osteogenic-associated genes were assessed to determine the differen-tiation of BMSCs.Bone marrow-derived macrophages(BMMs)were incubated with receptor activator of nuclear factor-kappaΒligand to induce osteoclast differentiation,and osteoclast differen-tiation was confirmed by tartrate-resistant acid phosphatase staining.Other related genes were measured via reverse transcription coupled to the quantitative polymerase chain reaction and western blotting.Enzyme-linked immunosorbent assays were used to measure the levels of inflammatory cytokines,including tumor necrosis factor alpha,interleukin-6 and interleukin-1 beta.RESULTS The osteogenic and adipogenic differentiation potential of BMSCs isolated from mouse bone marrow samples was evaluated.JMJD1C mRNA and protein expression was upregulated in BMSCs after osteoblast induction,while p-nuclear factor-κB(NF-κB)and inflammatory cytokines were not significantly altered.Knockdown of JMJD1C repressed osteogenic differentiation and enhanced NF-κB activation and inflammatory cytokine release in BMSCs.Moreover,JMJD1C expression decreased during BMM osteoclast differentiation.CONCLUSION The JMJD1C/NF-κB signaling pathway is potentially involved in BMSC osteogenic differentiation and may play vital roles in the pathogenesis of osteoporosis.

Analyze interleukin-1β,interleukin-6,and tumor necrosis factor-αlevels in dry eye and the therapeutic effect of cyclosporine A

BACKGROUND Dry eye is a common eye disease.Artificial tears supplements are widely used for the treatment of dry eyes.However,multiple adverse effects have been observed in patients receiving long-term treatment with artificial tears,which may affect the therapeutic effect.AIM To analyze the characteristics of interleukin-1β(IL-1β),interleukin-6(IL-6),and tumor necrosis factor-alpha(TNF-α)levels in patients with dry eye and the therapeutic effect of artificial tears combined with cyclosporine A.METHODS A total of 124 dry eye patients treated at The First People’s Hospital of Xining from April 2020 to April 2022 were selected as the observation group,while 20 healthy individuals served as the control group during the same period.Levels of inflammatory markers,including IL-1β,IL-6,and TNF-α,were analyzed.The observation group was further divided into a study group and a control group,each consisting of 62 patients.The control group received artificial tears,whereas the study group received a combination of artificial tears and cyclosporine A.Inflammatory markers,Schirmer’s test(SIT),tear break-up time(TBUT),corneal fluorescein staining(CFS),National Eye Institute Visual Function Questionnaire-25(NEI-VFQ-25)scores,and adverse events(AEs)were compared between the two groups.RESULTS The observation group exhibited significantly elevated serum levels of IL-1β,IL-6,and TNF-αin comparison to the healthy group.Following treatment,the study group demonstrated substantial reductions in IL-1β,IL-6,and TNF-αlevels relative to the control group.Moreover,after treatment,the study group experienced a marked decrease in CFS scores and significant increases in both SIT and BUT levels when compared to the control group.Additionally,significant improvements were observed in the primary symptom of dry eye and secondary symptoms such as photophobia,foreign body sensation,fatigue,red eye,and burning sensation within the study group.Furthermore,post-treatment NEI-VFQ-25 scores across all dimensions exhibited significant enhancements in the study group compared to the control group(P<0.05).It is noteworthy that significant AEs were reported in both groups throughout the treatment period.CONCLUSION Cyclosporine A combined with artificial tears is effective in treating dry eye,yielding enhanced outcomes by improving SIT and TBUT levels,reducing CFS scores,and ameliorating vision-related quality of life.

The action mechanism by which C1q/tumor necrosis factor-related protein-6 alleviates cerebral ischemia/reperfusion injury in diabetic mice

Studies have shown that C1q/tumor necrosis factor-related protein-6 (CTRP6) can alleviate renal ischemia/reperfusion injury in mice. However, its role in the brain remains poorly understood. To investigate the role of CTRP6 in cerebral ischemia/reperfusion injury associated with diabetes mellitus, a diabetes mellitus mouse model of cerebral ischemia/reperfusion injury was established by occlusion of the middle cerebral artery. To overexpress CTRP6 in the brain, an adeno-associated virus carrying CTRP6 was injected into the lateral ventricle. The result was that oxygen injury and inflammation in brain tissue were clearly attenuated, and the number of neurons was greatly reduced. In vitro experiments showed that CTRP6 knockout exacerbated oxidative damage, inflammatory reaction, and apoptosis in cerebral cortical neurons in high glucose hypoxia-simulated diabetic cerebral ischemia/reperfusion injury. CTRP6 overexpression enhanced the sirtuin-1 signaling pathway in diabetic brains after ischemia/reperfusion injury. To investigate the mechanism underlying these effects, we examined mice with depletion of brain tissue-specific sirtuin-1. CTRP6-like protection was achieved by activating the sirtuin-1 signaling pathway. Taken together, these results indicate that CTRP6 likely attenuates cerebral ischemia/reperfusion injury through activation of the sirtuin-1 signaling pathway.

Growth differentiation factor-15 serum concentrations reflect disease severity and anemia in patients with inflammatory bowel disease

BACKGROUND Population of patients with inflammatory bowel disease(IBD)is burdened by various extraintestinal manifestations which substantially contribute to greater morbidity and mortality.Growth-differentiation factor-15(GDF-15)is often overexpressed under stress conditions,such as inflammation,malignancies,heart failure,myocardial ischemia,and many others.AIM To explore the association between GDF-15 and IBD as serum concentrations of GDF-15 were shown to be an independent predictor of poor outcomes in multiple diseases.An additional aim was to determine possible associations between GDF-15 and multiple clinical,anthropometric and laboratory parameters in patients with IBD.METHODS This cross-sectional study included 90 adult patients diagnosed with IBD,encompassing both Crohn’s disease(CD)and ulcerative colitis(UC),and 67 healthy age-and sex-matched controls.All patients underwent an extensive workup,including colonoscopy with subsequent histopathological analysis.Disease activity was assessed by two independent gastroenterology consultants specialized in IBD,employing well-established clinical and endoscopic scoring systems.GDF-15 serum concentrations were determined following an overnight fasting,using electrochemiluminescence immunoassay.RESULTS In patients with IBD,serum GDF-15 concentrations were significantly higher in comparison to the healthy controls[800(512-1154)pg/mL vs 412(407-424)pg/mL,P<0.001],whereas no difference in GDF-15 was found between patients with CD and UC[807(554-1451)pg/mL vs 790(509-956)pg/mL,P=0.324].Moreover,multiple linear regression analysis showed that GDF-15 levels predict CD and UC severity independent of age,sex,and C-reactive protein levels(P=0.016 and P=0.049,respectively).Finally,an association between GDF-15 and indices of anemia was established.Specifically,negative correlations were found between GDF-15 and serum iron levels(r=-0.248,P=0.021),as well as GDF-15 and hemoglobin(r=-0.351,P=0.021).Accordingly,in comparison to IBD patients with normal hemoglobin levels,GDF-15 serum levels were higher in patients with anemia(1256(502-2100)pg/mL vs 444(412-795)pg/mL,P<0.001).CONCLUSION For the first time,we demonstrated that serum concentrations of GDF-15 are elevated in patients with IBD in comparison to healthy controls,and the results imply that GDF-15 might be involved in IBD pathophysiology.Yet,it remains elusive whether GDF-15 could serve as a prognostic indicator in these patients.

Interferon-gamma regulates the progression of neuroblastoma cells through interferon-regulatory factor-1

Objective:This study aimed to elucidate the influence of IFN-gamma(IFN-γ)in neuroblastoma(NB)cells and reveal its potential underlying molecular mechanism.Methods:The Cell Counting Kit-8,Transwell apparatus,and flow cytometry were employed to assess cellular viability,migratory capacity,invasive potential,and apoptotic rates,respectively.RNA-seq combined with bioinformatics analysis revealed differentially expressed genes(DEGs)and their possible biological functions.Protein levels were determined by western blot analysis.Results:IFN-γtreatment resulted in diminished cell viability,mitigated migratory and invasive capabilities,and augmented apoptotic activity in the SK-N-BE(2)cell line,whereas it exhibited the opposite effect in SH-SY5Y cells.Furthermore,interferon regulatory factor 1(IRF-1)was the common DEG in both IFN-γ-treated SK-N-BE(2)and SH-SY5Y cells.Additionally,we found that it was underexpressed in NB tissues.The depletion of IRF-1 promoted the progression of both SK-N-BE(2)and SH-SY5Y cells.Moreover,IRF-1 knockdown effectively counteracted the effects of IFN-γon SK-N-BE(2)cells,while exacerbating them in SH-SY5Y cells.Conclusion:This study verified that IFN-γexerted a distinct role in both N-Myc-and non-N-Myc-amplified NB cells,partially by mediating the expression of IRF-1,suggesting that it may serve as a potent agent for treating patients with NB.

Hydrogen-rich water alleviates constipation by attenuating oxidative stress through the sirtuin1/nuclear factor-erythroid-2-related factor 2/heme oxygenase-1 signaling pathway

BACKGROUND Constipation,a highly prevalent functional gastrointestinal disorder,induces a significant burden on the quality of patients'life and is associated with substantial healthcare expenditures.Therefore,identifying efficient therapeutic modalities for constipation is of paramount importance.Oxidative stress is a pivotal contributor to colonic dysmotility and is the underlying pathology responsible for constipation symptoms.Consequently,we postulate that hydrogen therapy,an emerging and promising intervention,can serve as a safe and efficacious treatment for constipation.AIM To determine whether hydrogen-rich water(HRW)alleviates constipation and its potential mechanism.METHODS Constipation models were established by orally loperamide to Sprague-Dawley rats.Rats freely consumed HRW,and were recorded their 24 h total stool weight,fecal water content,and charcoal propulsion rate.Fecal samples were subjected to 16S rDNA gene sequencing.Serum non-targeted metabolomic analysis,malondialdehyde,and superoxide dismutase levels were determined.Colonic tissues were stained with hematoxylin and eosin,Alcian blue-periodic acid-Schiff,reactive oxygen species(ROS)immunofluorescence,and immunohistochemistry for cell growth factor receptor kit(c-kit),PGP 9.5,sirtuin1(SIRT1),nuclear factor-erythroid-2-related factor 2(Nrf2),and heme oxygenase-1(HO-1).Quantitative real-time PCR and western blot analysis were conducted to determine the expression level of SIRT1,Nrf2 and HO-1.A rescue experiment was conducted by intraperitoneally injecting the SIRT1 inhibitor,EX527,into constipated rats.NCM460 cells were induced with H2O2 and treated with the metabolites to evaluate ROS and SIRT1 expression.RESULTS HRW alleviated constipation symptoms by improving the total amount of stool over 24 h,fecal water content,charcoal propulsion rate,thickness of the intestinal mucus layer,c-kit expression,and the number of intestinal neurons.HRW modulated intestinal microbiota imbalance and abnormalities in serum metabolism.HRW could also reduce intestinal oxidative stress through the SIRT1/Nrf2/HO-1 signaling pathway.This regulatory effect on oxidative stress was confirmed via an intraperitoneal injection of a SIRT1 inhibitor to constipated rats.The serum metabolites,β-leucine(β-Leu)and traumatic acid,were also found to attenuate H2O2-induced oxidative stress in NCM460 cells by up-regulating SIRT1.CONCLUSION HRW attenuates constipation-associated intestinal oxidative stress via SIRT1/Nrf2/HO-1 signaling pathway,modulating gut microbiota and serum metabolites.β-Leu and traumatic acid are potential metabolites that upregulate SIRT1 expression and reduce oxidative stress.

Hypoxia-inducible factor-1αin myocardial infarction

Hypoxia-inducible factor 1(HIF1)has a crucial function in the regulation of oxygen levels in mammalian cells,especially under hypoxic conditions.Its importance in cardiovascular diseases,particularly in cardiac ischemia,is because of its ability to alleviate cardiac dysfunction.The oxygen-responsive subunit,HIF1α,plays a crucial role in this process,as it has been shown to have cardioprotective effects in myocardial infarction through regulating the expression of genes affecting cellular survival,angiogenesis,and metabolism.Furthermore,HIF1αexpression induced reperfusion in the ischemic skeletal muscle,and hypoxic skin wounds in diabetic animal models showed reduced HIF1αexpression.Increased expression of HIF1αhas been shown to reduce apoptosis and oxidative stress in cardiomyocytes during acute myocardial infarction.Genetic variations in HIF1αhave also been found to correlate with altered responses to ischemic cardiovascular disease.In addition,a link has been established between the circadian rhythm and hypoxic molecular signaling pathways,with HIF1αfunctioning as an oxygen sensor and circadian genes such as period circadian regulator 2 responding to changes in light.This editorial analyzes the relationship between HIF1αand the circadian rhythm and highlights its significance in myocardial adaptation to hypoxia.Understanding the changes in molecular signaling pathways associated with diseases,specifically cardiovascular diseases,provides the opportunity for innovative therapeutic interventions,especially in low-oxygen environments such as myocardial infarction.

Ghrelin regulates insulin resistance by targeting insulin-like growth factor-1 receptor via miR-455-5p in hepatic cells

Objective: To explore the mechanism by which ghrelin regulates insulin sensitivity through modulation of miR-455-5p in hepatic cells. Methods: HepG2 cells were treated with or without DAG (1 μM). Glucose consumption, intracellular glycogen content, phosphorylation of PI3K and Akt stimulated by insulin, expression of miR-455-5p, as well as IGF-1R protein level were analyzed. In addition, bioinformatic analysis, dual luciferase reporter assay, miR- 455-5p mimic or inhibitor treatment was conducted to investigate the molecular mechanisms. Results: High glucose treatment upregulated miR-455-5p expression but reduced glucose consumption and glycogen content. DAG reversed the effect of high glucose on glucose metabolism, increased protein level of IGF-1R and phosphorylation of PI3K/Akt stimulated by insulin, as well as downregulated miR-455-5p expression. Bioinformatic analysis indicated IGF-1R was the target of miR-455-5p. Dual luciferase reporter assay, as well as transfection with miR-455-5p mimic/inhibitor confirmed that DAG activated IGF-1R/PI3K/Akt signaling via inhibiting miR-455-5p. Conclusion: DAG improves insulin resistance via miR-455-5p- mediated activation of IGF-1R/PI3K/Akt system, suggesting that suppression of miR-455-5p or activation of DAG may be potential targets for T2DM therapy.

Transforming growth factor-beta 1 enhances discharge activity of cortical neurons

Transforming growth factor-beta 1(TGF-β1)has been extensively studied for its pleiotropic effects on central nervous system diseases.The neuroprotective or neurotoxic effects of TGF-β1 in specific brain areas may depend on the pathological process and cell types involved.Voltage-gated sodium channels(VGSCs)are essential ion channels for the generation of action potentials in neurons,and are involved in various neuroexcitation-related diseases.However,the effects of TGF-β1 on the functional properties of VGSCs and firing properties in cortical neurons remain unclear.In this study,we investigated the effects of TGF-β1 on VGSC function and firing properties in primary cortical neurons from mice.We found that TGF-β1 increased VGSC current density in a dose-and time-dependent manner,which was attributable to the upregulation of Nav1.3 expression.Increased VGSC current density and Nav1.3 expression were significantly abolished by preincubation with inhibitors of mitogen-activated protein kinase kinase(PD98059),p38 mitogen-activated protein kinase(SB203580),and Jun NH2-terminal kinase 1/2 inhibitor(SP600125).Interestingly,TGF-β1 significantly increased the firing threshold of action potentials but did not change their firing rate in cortical neurons.These findings suggest that TGF-β1 can increase Nav1.3 expression through activation of the ERK1/2-JNK-MAPK pathway,which leads to a decrease in the firing threshold of action potentials in cortical neurons under pathological conditions.Thus,this contributes to the occurrence and progression of neuroexcitatory-related diseases of the central nervous system.

Treadmill exercise in combination with acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice through the brain-derived neurotrophic factor-and Cygb-associated signaling pathways

A reduction in adult neurogenesis is associated with behavioral abnormalities in patients with Alzheimer's disease.Consequently,enhancing adult neurogenesis represents a promising therapeutic approach for mitigating disease symptoms and progression.Nonetheless,nonpharmacological interventions aimed at inducing adult neurogenesis are currently limited.Although individual non-pharmacological interventions,such as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,have shown limited capacity to improve neurogenesis and cognitive function in patients with Alzheimer's disease,the therapeutic effect of a strategy that combines these interventions has not been fully explored.In this study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in the hippocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 months.Amyloid deposition became evident at 4 months,while neurogenesis declined by 6 months,further deteriorating as the disease progressed.However,following a 4-week multifactor stimulation protocol,which encompassed treadmill running(46 min/d,10 m/min,6 days per week),40 Hz acousto-optic stimulation(1 hour/day,6 days/week),and olfactory stimulation(1 hour/day,6 days/week),we found a significant increase in the number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,the amyloid-beta load in the hippocampus decreased.These findings suggest that multifactor stimulation can enhance adult hippocampal neurogenesis and mitigate amyloid-beta neuropathology in amyloid precursor protein/presenilin 1 mice.Furthermore,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice following multifactor stimulation,as evidenced by Morris water maze,novel object recognition,forced swimming test,and tail suspension test results.Notably,the efficacy of multifactor stimulation in consolidating immature neurons persisted for at least 2weeks after treatment cessation.At the molecular level,multifactor stimulation upregulated the expression of neuron-related proteins(NeuN,doublecortin,postsynaptic density protein-95,and synaptophysin),anti-apoptosis-related proteins(Bcl-2 and PARP),and an autophagyassociated protein(LC3B),while decreasing the expression of apoptosis-related proteins(BAX and caspase-9),in the hippocampus of amyloid precursor protein/presenilin 1 mice.These observations might be attributable to both the brain-derived neurotrophic factor-mediated signaling pathway and antioxidant pathways.Furthermore,serum metabolomics analysis indicated that multifactor stimulation regulated differentially expressed metabolites associated with cell apoptosis,oxidative damage,and cognition.Collectively,these findings suggest that multifactor stimulation is a novel non-invasive approach for the prevention and treatment of Alzheimer's disease.

GLP-1受体激动剂对心血管作用的研究进展

胰高血糖素样肽-1(glucagon-like peptide-1,GLP-1)由肠道内分泌细胞产生。GLP-1受体激动剂(GLP-1 receptor agonists,GLP-1RAs)促进葡萄糖相关的胰岛素分泌和抑制胰高血糖素分泌。GLP-1RAs还能抑制胃排空、食物摄入和限制体质量增加。在过去的十年中,GLP-1RAs对心血管系统影响的研究已经取得重大进展。口服小分子GLP-1RAs具有潜在优势,可以提高该类药物的应用。该文综述了GLP-1RAs在心血管疾病治疗中的多种作用,为GLP-1RAs的心血管获益提供新见解。

1-甲基环丙烯结合水杨酸处理维持百香果甲基环丙烯结合水杨酸处理维持百香果果实贮藏品质

为延长百香果的贮藏期并保持贮藏过程中的品质,对比研究2 mmol/L水杨酸(salicylic acid,SA)、1 mmol/L 1-甲基环丙烯(1-methylcyclopropene,1-MCP)、1-MCP结合SA处理对紫色百香果果实采后贮藏期间品质、活性氧、抗氧化酶指标的影响。百香果果实经SA、1-MCP和1-MCP结合SA处理后,一定程度抑制乙烯的释放和脂氧合酶(li-poxygenase,LOX)活性,促进几丁质酶(chitinase,CHI)和β-1,3-葡聚糖酶(β-1,3-glucanase,GLU)的活性,增强抗氧化和抗病性作用,降低腐烂率。但因SA可以增强呼吸,故导致凹陷和失重,加快总酸流失;1-MCP抑制呼吸作用,增强超氧化物歧化酶(superoxide dismutase,SOD)活性,有利于控制失重和凹陷,但其对过氧化物酶(peroxidase,POD)活性的影响不利于控制衰老。1-MCP结合SA对POD活性,CHI活性以及GLU活性的正向影响强于单独使用1-MCP或SA处理。因此,1-MCP结合SA通过提高百香果果实的抗氧化能力和抗病能力,降低百香果果实的凹陷、失重和腐烂率,且可有效避免单独使用1-MCP或SA处理的不良作用,协同维持百香果果实采后贮藏品质。

糖尿病视网膜病变患者SDF-1、HO-1及MDA水平变化及与IL-6、TNF-α、CRP的相关性

目的 分析糖尿病视网膜病变(DR)患者基质细胞衍生因子(SDF-1)、血红素加氧酶-1(HO-1)及丙二醛(MDA)水平变化及与白介素-6(IL-6)、肿瘤坏死因子(TNF-α)、C反应蛋白(CRP)的相关性。方法 选取2020年5月至2023年1月解放军总医院收治的131例DR患者为DR组,另选取同期在本院住院的2型糖尿病患者100例为非DR组。比较两组SDF-1、HO-1、MDA水平;比较两组IL-6、TNF-α、CRP水平;比较不同分期DR患者SDF-1、HO-1、MDA水平;采用Logistic回归分析影响DR发生的相关因素,分析DR组患者SDF-1、HO-1、MDA水平与IL-6、TNF-α、CRP的相关性。结果 DR组SDF-1、HO-1水平比非DR组低,MDA水平比非DR组高,差异有统计学意义(P<0.05);DR组IL-6、TNF-α、CRP水平均比非DR组高,差异有统计学意义(P<0.05);SDF-1、HO-1水平:Ⅰ~Ⅱ期>Ⅲ~Ⅳ期>Ⅴ~Ⅵ期,MDA水平:Ⅰ~Ⅱ期<Ⅲ~Ⅳ期<Ⅴ~Ⅵ期,差异有统计学意义(P<0.05);经Logistic多因素分析显示,性别为女、BMI≥24 km/m2、合并患有高血压、高血脂、IL-6>1.17 mg/mL、TNF-α>30 ng/L、CRP>10 ng/mL、SDF-1>2 ng/mL、HO-1<125 ng/mL、MDA>4.06μmol/mL均是影响DR发生的独立危险因素(P<0.05);血清炎性因子IL-6、TNF-α、CRP与SDF-1、HO-1呈负相关,与MDA呈正相关,且均为中度相关(P<0.05)。结论 SDF-1、HO-1、MDA、IL-6、CRP、TNF-α水平与DR的发生、发展有一定关系,通过检测上述指标水平可为进一步探讨DR的发病机制和治疗方法提供新的思路。

口服葡萄糖耐量试验1h血糖对糖尿病前期的诊断和鉴别价值

目的:探讨口服葡萄糖耐量试验(OGTT)1 h血糖对糖尿病前期的诊断和鉴别价值。方法:收集2019年6月至2022年6月于北京中医药大学东直门医院门诊及住院行OGTT的受试者1 206例,其中血糖正常412例,糖尿病前期358例,糖尿病436例。比较3组OGTT不同时点血糖与空腹血糖(FPG)、空腹胰岛素(FINS)、稳态模型胰岛素抵抗指数(HOMA-IR)、胰岛β细胞分泌功能指数(HOMA-β)水平;采用ROC曲线分析OGTT 1 h血糖对糖尿病前期的诊断和鉴别价值。结果:3组OGTT各时点血糖均为糖尿病组>糖尿病前期组>血糖正常组(P<0.05)。FPG、HOMA-IR糖尿病组>糖尿病前期组>血糖正常组,FINS、HOMA-β糖尿病组<糖尿病前期组<血糖正常组(P<0.05)。ROC曲线分析结果显示,OGTT 1 h血糖诊断糖尿病前期的AUC(95%CI)为0.758(0.724~0.792),以敏感度最大选取最佳切点值,该值为9.35 mmol/L,此时敏感度为0.701,特异度为0.709;OGTT 1 h血糖对糖尿病和糖尿病前期鉴别的AUC(95%CI)为0.956(0.942~0.969),以敏感度最大选取最佳切点值,该值为12.55 mmol/L,此时敏感度为0.901,特异度为0.908。结论:OGTT 1 h血糖对糖尿病前期具有一定的诊断和鉴别价值。

梨杂交F_(1)果实性状遗传倾向分析

以延边大香水为母本,红香酥、早酥、红茄、晋酥、晋密、鄂梨1号和云红1号为父本的7个梨杂交组合F_(1)为试材,对果实性状进行连续3年调查,总结分析果实性状遗传倾向,以期为梨遗传育种提供参考依据。结果表明:杂种F_(1)单果重、果实横径、果实纵径、果柄长度、果柄粗度、果形指数及可溶性固形物等7个性状都有趋中遗传倾向。其中,单果重产生退化,向小果遗传趋势强;可溶性固形物和果形指数变异系数较小,遗传传递力较高;果柄粗度呈趋中偏低遗传,果柄长度、果实横径、果实纵径呈趋中偏高遗传。对不同组合果实性状遗传倾向研究认为果实底色、萼片类型、萼洼深度、质地、汁液、风味等性状受母本影响较大,为母性遗传;萼洼广度有趋中遗传倾向;果实香气受父本影响较大;果实面色可隔代遗传。以上研究结果为梨果实性状遗传规律研究及杂交育种亲本的选择选配提供参考价值。

青藤碱可有效抑制白细胞介素1β介导的髓核细胞凋亡

背景:椎间盘退变是导致脊柱退行性疾病的基础,然而目前尚无有效的治疗药物。目的:探讨青藤碱是否可以抑制白细胞介素1β诱导的髓核细胞凋亡及其分子机制。方法:采用胰酶联合Ⅱ型胶原酶消化法体外培养大鼠髓核细胞,并绘制细胞生长曲线,采用CCK-8法筛选合适的青藤碱药物浓度。将髓核细胞分为对照组、青藤碱组、白细胞介素1β组、青藤碱+白细胞介素1β组、锌原卟啉(血红素氧合酶1抑制剂)组、锌原卟啉+青藤碱组、锌原卟啉+白细胞介素1β组、青藤碱+锌原卟啉+白细胞介素1β组。分别检测各组髓核细胞增殖活性、活性氧含量、凋亡率及血红素氧合酶1的表达情况。结果与结论:①体外培养的大鼠髓核细胞呈现多角形、三角形、短楔形等形态,其呈现“S”型曲线生长,接种第1-3天生长缓慢,第4-6天生长迅速,第七八天生长速度缓慢,进入“平台期”,细胞数量不再增加;②当青藤碱的浓度≤80μmol/L时,髓核细胞的增殖活性不会受到显著影响(P>0.05);③白细胞介素1β可以显著降低髓核细胞的增殖活性,增加活性氧含量,导致细胞凋亡(P<0.01);④当采用青藤碱干预后,不仅可以促进血红素氧合酶1的表达(P<0.05),而且可以抑制白细胞介素1β诱导的髓核细胞增殖活性降低、活性氧含量和凋亡率增加(P<0.05),其作用可被锌原卟啉逆转(P<0.01)。

肺腺癌患者胸水肿瘤细胞PD-L1/TTF-1表达及应用分析

目的探讨肺腺癌患者胸水肿瘤细胞程序性细胞死亡配体1(PD-L1)/甲状腺转录因子1(TTF-1)、PD-L1免疫组化染色的表达及与组织标本PD-L1表达一致性及其应用研究。方法选取2021年1月至2023年4月间首都医科大学附属北京朝阳医院收治的符合入组条件的50例肺腺癌患者为研究对象,比较同一病例组织标本中肿瘤细胞的PD-L1表达和胸水细胞蜡块中肿瘤细胞的PD-L1、PD-L1/TTF-1表达情况,评估它们之间表达的一致性。结果50例肺腺癌组织标本PD-L1的表达与患者性别、年龄、标本类型、病灶性质、标本来源和EGFR突变对比差异无统计学意义(P>0.05);胸水细胞蜡块中肿瘤细胞PD-L1/TTF-1免疫组化双染的表达与组织标本PD-L1表达的一致性较好(κ=0.846,P<0.05),明显高于PD-L1免疫组化单染(κ=0.754,P<0.05),与手术或活检切除标本一致性较好(κ=0.90,P<0.05),高于胸腔镜或穿刺小标本(κ=0.82,P<0.05),与原发病灶标本的一致性适中(κ=0.689,P<0.05),与转移病灶标本的一致性较好(κ=0.779,P<0.05)。结论胸水细胞学标本采用PD-L1/TTF-1免疫组化双染与组织标本PD-L1表达一致性较高,细胞蜡块PD-L1/TTF-1双染可在组织不易获取时作为一种有益补充,供临床制定免疫治疗方案参考。