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SIRT1 inhibits apoptosis of human lens epithelial cells through suppressing endoplasmic reticulum stress in vitro and in vivo
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作者 Hui Cui Di Sun +3 位作者 Sheng Meng Tian-Ju Ma Zi Ye Zhao-Hui Li 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第7期1205-1216,共12页
AIM:To explore the effect of silent information regulator factor 2-related enzyme 1(SIRT1)on modulating apoptosis of human lens epithelial cells(HLECs)and alleviating lens opacification of rats through suppressing end... AIM:To explore the effect of silent information regulator factor 2-related enzyme 1(SIRT1)on modulating apoptosis of human lens epithelial cells(HLECs)and alleviating lens opacification of rats through suppressing endoplasmic reticulum(ER)stress.METHODS:HLECs(SRA01/04)were treated with varying concentrations of tunicamycin(TM)for 24h,and the expression of SIRT1 and C/EBP homologous protein(CHOP)was assessed using real-time quantitative polymerase chain reaction(RT-PCR),Western blotting,and immunofluorescence.Cell morphology and proliferation was evaluated using an inverted microscope and cell counting kit-8(CCK-8)assay,respectively.In the SRA01/04 cell apoptosis model,which underwent siRNA transfection for SIRT1 knockdown and SRT1720 treatment for its activation,the expression levels of SIRT1,CHOP,glucose regulated protein 78(GRP78),and activating transcription factor 4(ATF4)were examined.The potential reversal of SIRT1 knockdown effects by 4-phenyl butyric acid(4-PBA;an ER stress inhibitor)was investigated.In vivo,age-related cataract(ARC)rat models were induced by sodium selenite injection,and the protective role of SIRT1,activated by SRT1720 intraperitoneal injections,was evaluated through morphology observation,hematoxylin and eosin(H&E)staining,Western blotting,and RT-PCR.RESULTS:SIRT1 expression was downregulated in TMinduced SRA01/04 cells.Besides,in SRA01/04 cells,both cell apoptosis and CHOP expression increased with the rising doses of TM.ER stress was stimulated by TM,as evidenced by the increased GRP78 and ATF4 in the SRA01/04 cell apoptosis model.Inhibition of SIRT1 by siRNA knockdown increased ER stress activation,whereas SRT1720 treatment had opposite results.4-PBA partly reverse the adverse effect of SIRT1 knockdown on apoptosis.In vivo,SRT1720 attenuated the lens opacification and weakened the ER stress activation in ARC rat models.CONCLUSION:SIRT1 plays a protective role against TM-induced apoptosis in HLECs and slows the progression of cataract in rats by inhibiting ER stress.These findings suggest a novel strategy for cataract treatment focused on targeting ER stress,highlighting the therapeutic potential of SIRT1 modulation in ARC development. 展开更多
关键词 silent information regulator factor 2-related enzyme 1 endoplasmic reticulum stress APOPTOSIS human lens epithelial cells CATARACT
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Self-assembly of differentiated dental pulp stem cells facilitates spheroid human dental organoid formation and prevascularization
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作者 Fei Liu Jing Xiao +4 位作者 Lei-Hui Chen Yu-Yue Pan Jun-Zhang Tian Zhi-Ren Zhang Xiao-Chun Bai 《World Journal of Stem Cells》 SCIE 2024年第3期287-304,共18页
BACKGROUND The self-assembly of solid organs from stem cells has the potential to greatly expand the applicability of regenerative medicine.Stem cells can self-organise into microsized organ units,partially modelling ... BACKGROUND The self-assembly of solid organs from stem cells has the potential to greatly expand the applicability of regenerative medicine.Stem cells can self-organise into microsized organ units,partially modelling tissue function and regeneration.Dental pulp organoids have been used to recapitulate the processes of tooth development and related diseases.However,the lack of vasculature limits the utility of dental pulp organoids.AIM To improve survival and aid in recovery after stem cell transplantation,we demonstrated the three-dimensional(3D)self-assembly of adult stem cell-human dental pulp stem cells(hDPSCs)and endothelial cells(ECs)into a novel type of spheroid-shaped dental pulp organoid in vitro under hypoxia and conditioned medium(CM).METHODS During culture,primary hDPSCs were induced to differentiate into ECs by exposing them to a hypoxic environment and CM.The hypoxic pretreated hDPSCs were then mixed with ECs at specific ratios and conditioned in a 3D environment to produce prevascularized dental pulp organoids.The biological characteristics of the organoids were analysed,and the regulatory pathways associated with angiogenesis were studied.RESULTS The combination of these two agents resulted in prevascularized human dental pulp organoids(Vorganoids)that more closely resembled dental pulp tissue in terms of morphology and function.Single-cell RNA sequencing of dental pulp tissue and RNA sequencing of Vorganoids were integrated to analyse key regulatory pathways associated with angiogenesis.The biomarkers forkhead box protein O1 and fibroblast growth factor 2 were identified to be involved in the regulation of Vorganoids.CONCLUSION In this innovative study,we effectively established an in vitro model of Vorganoids and used it to elucidate new mechanisms of angiogenesis during regeneration,facilitating the development of clinical treatment strategies. 展开更多
关键词 human dental pulp stem cells Prevascularized organoids Integrated analyses ANGIOGENESIS Forkhead box protein O1
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Interferon-gamma and tumor necrosis factor-alpha synergistically enhance the immunosuppressive capacity of human umbilical-cordderived mesenchymal stem cells by increasing PD-L1 expression 被引量:1
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作者 Zhuo Chen Meng-Wei Yao +10 位作者 Zhi-Lin Shen Shi-Dan Li Wei Xing Wei Guo Zhan Li Xiao-Feng Wu Luo-Quan Ao Wen-Yong Lu Qi-Zhou Lian Xiang Xu Xiang Ao 《World Journal of Stem Cells》 SCIE 2023年第8期787-806,共20页
BACKGROUND The immunosuppressive capacity of mesenchymal stem cells(MSCs)is dependent on the“license”of several proinflammatory factors to express immunosuppressive factors such as programmed cell death 1 ligand 1(P... BACKGROUND The immunosuppressive capacity of mesenchymal stem cells(MSCs)is dependent on the“license”of several proinflammatory factors to express immunosuppressive factors such as programmed cell death 1 ligand 1(PD-L1),which determines the clinical therapeutic efficacy of MSCs for inflammatory or immune diseases.In MSCs,interferon-gamma(IFN-γ)is a key inducer of PD-L1 expression,which is synergistically enhanced by tumor necrosis factor-alpha(TNF-α);however,the underlying mechanism is unclear.AIM To reveal the mechanism of pretreated MSCs express high PD-L1 and explore the application of pretreated MSCs in ulcerative colitis.METHODS We assessed PD-L1 expression in human umbilical-cord-derived MSCs(hUC-MSCs)induced by IFN-γand TNF-α,alone or in combination.Additionally,we performed signal pathway inhibitor experiments as well as RNA interference experiments to elucidate the molecular mechanism by which IFN-γalone or in combination with TNF-αinduces PD-L1 expression.Moreover,we used luciferase reporter gene experiments to verify the binding sites of the transcription factors of each signal transduction pathway to the targeted gene promoters.Finally,we evaluated the immunosuppressive capacity of hUC-MSCs treated with IFN-γand TNF-αin both an in vitro mixed lymphocyte culture assay,and in vivo in mice with dextran sulfate sodium-induced acute colitis.RESULTS Our results suggest that IFN-γinduction alone upregulates PD-L1 expression in hUC-MSCs while TNF-αalone does not,and that the co-induction of IFN-γand TNF-αpromotes higher expression of PD-L1.IFN-γinduces hUCMSCs to express PD-L1,in which IFN-γactivates the JAK/STAT1 signaling pathway,up-regulates the expression of the interferon regulatory factor 1(IRF1)transcription factor,promotes the binding of IRF1 and the PD-L1 gene promoter,and finally promotes PD-L1 mRNA.Although TNF-αalone did not induce PD-L1 expression in hUCMSCs,the addition of TNF-αsignificantly enhanced IFN-γ-induced JAK/STAT1/IRF1 activation.TNF-αupregulated IFN-γreceptor expression through activation of the nuclear factor kappa-B signaling pathway,which significantly enhanced IFN-γsignaling.Finally,co-induced hUC-MSCs have a stronger inhibitory effect on lymphocyte proliferation,and significantly ameliorate weight loss,mucosal damage,inflammatory cell infiltration,and up-regulation of inflammatory factors in colitis mice.CONCLUSION Overall,our results suggest that IFN-γand TNF-αenhance both the immunosuppressive ability of hUC-MSCs and their efficacy in ulcerative colitis by synergistically inducing high expression of PD-L1. 展开更多
关键词 human umbilical-cord-derived mesenchymal stem cells Programmed cell death 1 ligand 1 IMMUNOMODULATION INTERFERON-GAMMA Tumor necrosis factor-alpha Ulcerative colitis
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Human pluripotent stem cell-derivedβcells:Truly immature isletβcells for type 1 diabetes therapy?
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作者 Helen Jiang Fang-Xu Jiang 《World Journal of Stem Cells》 SCIE 2023年第4期182-195,共14页
A century has passed since the Nobel Prize winning discovery of insulin,which still remains the mainstay treatment for type 1 diabetes mellitus(T1DM)to this day.True to the words of its discoverer Sir Frederick Banti... A century has passed since the Nobel Prize winning discovery of insulin,which still remains the mainstay treatment for type 1 diabetes mellitus(T1DM)to this day.True to the words of its discoverer Sir Frederick Banting,“insulin is not a cure for diabetes,it is a treatment”,millions of people with T1DM are dependent on daily insulin medications for life.Clinical donor islet transplantation has proven that T1DM is curable,however due to profound shortages of donor islets,it is not a mainstream treatment option for T1DM.Human pluripotent stem cell derived insulin-secreting cells,pervasively known as stem cell-derivedβcells(SC-βcells),are a promising alternative source and have the potential to become a T1DM treatment through cell replacement therapy.Here we briefly review how isletβcells develop and mature in vivo and several types of reported SC-βcells produced using different ex vivo protocols in the last decade.Although some markers of maturation were expressed and glucose stimulated insulin secretion was shown,the SC-βcells have not been directly compared to their in vivo counterparts,generally have limited glucose response,and are not yet fully matured.Due to the presence of extra-pancreatic insulin-expressing cells,and ethical and technological issues,further clarification of the true nature of these SC-βcells is required. 展开更多
关键词 human pluripotent stem cells Stem cell-derivedβcells Isletβcells Type 1 diabetes mellitus cell replacement therapy
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过表达CASP1诱导人急性髓系白血病细胞THP-1的G_(0)/G_(1)细胞周期阻滞和NLRP3炎性小体介导的焦亡
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作者 艾克拜尔·阿布都热衣木 徐丽 +2 位作者 阿孜古丽·麦麦提 阿依姆妮萨·阿卜杜热合曼 帕提古力·苏力坦 《河北医学》 CAS 2024年第2期204-210,共7页
目的:探讨半胱天冬酶1(Caspase1,CASP1)对人急性髓系白血病(acute myeloid leukemia,AML)细胞THP-1的细胞周期和细胞焦亡的影响。方法:培养THP-1细胞,将细胞分为对照组(正常培养的THP-1细胞),pcDNA3.1-null组(过表达CASP1的阴性对照,用... 目的:探讨半胱天冬酶1(Caspase1,CASP1)对人急性髓系白血病(acute myeloid leukemia,AML)细胞THP-1的细胞周期和细胞焦亡的影响。方法:培养THP-1细胞,将细胞分为对照组(正常培养的THP-1细胞),pcDNA3.1-null组(过表达CASP1的阴性对照,用5.0μg/mL的pcDNA3.1-null质粒转染THP-1细胞24h)、pcDNA3.1-CASP1组(过表达CASP1,用5.0μg/mL的pcDNA3.1-CASP1质粒转染THP-1细胞24h)。用CCK-8法检测各组细胞的增殖活力。用流式细胞术检测各组细胞凋亡和周期的变化。用qRT-PCR法检测细胞中CASP1、白细胞介素(interleukin,IL)-1β,IL-18的mRNA表达水平。用Western blot法检测细胞增殖相关蛋白Ki67、增殖细胞核抗原(proliferating cell nuclear antigen,PCNA),细胞周期蛋白D1(cyclin D1)、NOD样受体热蛋白结构域相关蛋白3(Nod-like receptor heat protein domain associated protein 3,NLRP3)、凋亡相关斑点样蛋白((apoptosis-associated speck-like protein,ASC)、CASP1、切割半胱天冬酶1(cleaved-caspase 1,cleaved-CASP1)、IL-1β,IL-18、cleaved-Gasdermin D的相对表达水平。结果:与对照组比,pcDNA3.1-null组的细胞增殖活力、细胞凋亡、细胞周期变化均无统计学意义(P>0.05)。与对照组比,pcDNA3.1-CASP1组的细胞凋亡变化无统计学意义(P>0.05),细胞的增殖活力减少,G_(0)/G_(1)细胞周期被阻滞,Ki67、PCNA、cyclin D1的相对表达水平均减少(P<0.05),NLRP3、ASC、CASP1、cleaved-CASP1、IL-1β,IL-18、cleaved-Gasdermin D的相对表达水平均增加(P<0.05)。与pcDNA3.1-null组比,pcDNA3.1-CASP1组的细胞凋亡变化无统计学意义(P>0.05),细胞的增殖活力减少,G_(0)/G_(1)细胞周期被阻滞,Ki67、PCNA、cyclin D1的相对表达水平均减少(P<0.05),NLRP3、ASC、CASP1、cleaved-CASP1、IL-1β,IL-18、cleaved-Gasdermin D(30 kDA)的相对表达水平均增加(P<0.05)。结论:过表达CASP1诱导AML细胞THP-1的G_(0)/G_(1)细胞周期阻滞和NLRP3炎性小体介导的焦亡。 展开更多
关键词 人急性髓系白血病细胞 半胱天冬酶1 细胞周期 细胞焦亡
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Increased Expression and Activity of MMP-9 in C-reactive Protein-induced Human THP-1 Mononuclear Cells Is Related to Activation of Nuclear Factor Kappa-B 被引量:1
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作者 盛富强 程龙献 +1 位作者 曾秋棠 高文 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2009年第4期399-403,共5页
The relation between the expression and activity of MMP-9 in C-reactive protein (CRP)-induced human THP-1 mononuclear cells and the activation of nuclear factor kappa-B (NF-κB) was studied to investigate the poss... The relation between the expression and activity of MMP-9 in C-reactive protein (CRP)-induced human THP-1 mononuclear cells and the activation of nuclear factor kappa-B (NF-κB) was studied to investigate the possible role of CRP in plaque destabilization. Human THP-1 cells were incubated in the presence of CRP at 0 (control group), 25, 50 and 100 μg/mL (CRP groups) for 24 h. In PDTC (a specific NF-κB inhibitor) group, the cells were pre-treated with PDTC at 10 μmol/L and then with 100 μg/mL CRP. The conditioned media (CM) and human THP-1 cells in different groups were harvested. MMP-9 expression in CM and human THP-1 cells was measured by ELISA and Western blotting. MMP-9 activity was assessed by fluorogenic substrates. The expression of NF-κB inhibitor α (IκB-α) and NF-κB p65 was detected by Western blotting and ELISA respectively. The results showed that CRP increased the expression and activity of MMP-9 in a dose-dependent manner in the human THP-1 cells. Western blotting revealed that IiB-α expression was decreased in the cells with the concentrations of CRP and ELISA demonstrated that NF-κB p65 expression in the CRP-induced cells was increased. After pre-treatment of the cells with PDTC at 10 μmol/L, the decrease in IκB-α expression and the increase in NF-κB p65 expression in the CRP-induced cells were inhibited, and the expression and activity of MMP-9 were lowered too. It is concluded that increased expression and activity of MMP-9 in CRP-induced human THP-1 cells may be associated with activation of NF-κB. Down-regulation of the expression and activity of MMP-9 may be a new treatment alternative for plaque stabilization by inhibiting the NF-κB activation. 展开更多
关键词 C-reactive protein human thp-1 mononuclear cell matrix metalloproteinase-9 nuclear factor kappa-B
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Proteomic characterization of four subtypes of M2 macrophages derived from human THP-1 cells 被引量:3
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作者 Pengfei LI Chen MA +8 位作者 Jing LI Shanshan YOU Liuyi DANG Jingyu WU Zhifang HAO Jun LI Yuan ZHI Lin CHEN Shisheng SUN 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2022年第5期407-422,共16页
Macrophages are widely distributed immune cells that contribute to tissue homeostasis.Human THP-1 cells have been widely used in various macrophage-associated studies,especially those involving pro-inflammatory M1 and... Macrophages are widely distributed immune cells that contribute to tissue homeostasis.Human THP-1 cells have been widely used in various macrophage-associated studies,especially those involving pro-inflammatory M1 and anti-inflammatory M2 phenotypes.However,the molecular characterization of four M2 subtypes(M2a,M2b,M2c,and M2d)derived from THP-1has not been fully investigated.In this study,we systematically analyzed the protein expression profiles of human THP-1-derived macrophages(M0,M1,M2a,M2b,M2c,and M2d)using quantitative proteomics approaches.The commonly and specially regulated proteins of the four M2 subtypes and their potential biological functions were further investigated.The results showed that M2a and M2b,and M2c and M2d have very similar protein expression profiles.These data could serve as an important resource for studies of macrophages using THP-1 cells,and provide a reference to distinguish different M2 subtypes in macrophage-associated diseases for subsequent clinical research. 展开更多
关键词 MACROPHAGE thp-1 cells M2 subtype PROTEOMICS Biological function
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Neuroprotective effects of neural stem cells pretreated with neuregulin1β on PC12 cells exposed to oxygen-glucose deprivation/reoxygenation 被引量:3
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作者 Qiu-Yue Zhai Yuan-Hua Ye +4 位作者 Yu-Qian Ren Zhen-Hua Song Ke-Li Ge Bao-He Cheng Yun-Liang Guo 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第3期618-625,共8页
Studies on ischemia/reperfusion(I/R)injury suggest that exogenous neural stem cells(NSCs)are ideal candidates for stem cell therapy reperfusion injury.However,NSCs are difficult to obtain owing to ethical limitations.... Studies on ischemia/reperfusion(I/R)injury suggest that exogenous neural stem cells(NSCs)are ideal candidates for stem cell therapy reperfusion injury.However,NSCs are difficult to obtain owing to ethical limitations.In addition,the survival,differentiation,and proliferation rates of transplanted exogenous NSCs are low,which limit their clinical application.Our previous study showed that neuregulin1β(NRG1β)alleviated cerebral I/R injury in rats.In this study,we aimed to induce human umbilical cord mesenchymal stem cells into NSCs and investigate the improvement effect and mechanism of NSCs pretreated with 10 nM NRG1βon PC12 cells injured by oxygen-glucose deprivation/reoxygenation(OGD/R).Our results found that 5 and 10 nM NRG1βpromoted the generation and proliferation of NSCs.Co-culture of NSCs and PC12 cells under condition of OGD/R showed that pretreatment of NSCs with NRG1βimproved the level of reactive oxygen species,malondialdehyde,glutathione,superoxide dismutase,nicotinamide adenine dinucleotide phosphate,and nuclear factor erythroid 2-related factor 2(Nrf2)and mitochondrial damage in injured PC12 cells;these indexes are related to ferroptosis.Research has reported that p53 and solute carrier family 7 member 11(SLC7A11)play vital roles in ferroptosis caused by cerebral I/R injury.Our data show that the expression of p53 was increased and the level of glutathione peroxidase 4(GPX4)was decreased after RNA interference-mediated knockdown of SLC7A11 in PC12 cells,but this change was alleviated after co-culturing NSCs with damaged PC12 cells.These findings suggest that NSCs pretreated with NRG1βexhibited neuroprotective effects on PC12 cells subjected to OGD/R through influencing the level of ferroptosis regulated by p53/SLC7A11/GPX4 pathway. 展开更多
关键词 ferroptosis P53 SLC7A11 GPX4 human umbilical cord-mesenchymal stem cells neural stem cells neuregulin1β NEUROPROTECTION oxygen-glucose deprivation/reoxygenation PC12 cell
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Genetic modification of miR-34a enhances efficacy of transplanted human dental pulp stem cells after ischemic stroke 被引量:1
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作者 Jianfeng Wang Peibang He +7 位作者 Qi Tian Yu Luo Yan He Chengli Liu Pian Gong Yujia Guo Qingsong Ye Mingchang Li 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第9期2029-2036,共8页
Human dental pulp stem cells(hDPSCs) promote recovery after ischemic stro ke;however,the therapeutic efficacy is limited by the poor survival of transplanted cells.For in vitro expe riments in the present study,we use... Human dental pulp stem cells(hDPSCs) promote recovery after ischemic stro ke;however,the therapeutic efficacy is limited by the poor survival of transplanted cells.For in vitro expe riments in the present study,we used oxygen-glucose deprivation/reoxygenation in hDPSCs to mimic cell damage induced by ischemia/reperfusion.We found that miRNA-34a-5p(miR-34a) was elevated under oxygen-glucose deprivation/reoxygenation conditions in hDPSCs.Inhibition of miR-34a facilitated the prolife ration and antioxidant capacity and reduced the apoptosis of hDPSCs.Moreove r,dual-luciferase reporter gene assay showed WNT1and SIRT1 as the targets of miR-34a.In miR-34a knockdown cell lines,WNT1 suppression reduced cell prolife ration,and SIRT1 suppression decreased the antioxidant capacity.Togethe r,these results indicated that miR-34a regulates cell prolife ration and antioxidant stress via targeting WNT1 and SIRT1,respectively.For in vivo expe riments,we injected genetically modified hDPSCs(anti34a-hDPSCs) into the brains of mice.We found that anti34a-hDPSCs significantly inhibited apoptosis,reduced cerebral edema and cerebral infarct volume,and improved motor function in mice.This study provides new insights into the molecular mechanism of the cell prolife ration and antioxidant capacity of hDPSCs,and suggests a potential gene that can be targeted to improve the survival rate and efficacy of transplanted hDPSCs in brain after ischemic stroke. 展开更多
关键词 antioxidant capacity HO-1 human dental pulp stem cells ischemic stroke MIR-34A Nrf2 proliferation SIRT1 WNT1 β-catenin
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Artificial nerve graft constructed by coculture of activated Schwann cells and human hair keratin for repair of peripheral nerve defects 被引量:1
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作者 Han-Jun Qin Hang Li +5 位作者 Jun-Ze Chen Kai-Rui Zhang Xing-Qi Zhao Jian-Qiang Qin Bin Yu Jun Yang 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第5期1118-1123,共6页
Studies have shown that human hair keratin(HHK) has no antigenicity and excellent mechanical properties. Schwann cells, as unique glial cells in the peripheral nervous system, can be induced by interleukin-1β to secr... Studies have shown that human hair keratin(HHK) has no antigenicity and excellent mechanical properties. Schwann cells, as unique glial cells in the peripheral nervous system, can be induced by interleukin-1β to secrete nerve growth factor, which promotes neural regeneration. Therefore, HHK with Schwann cells may be a more effective approach to repair nerve defects than HHK without Schwann cells. In this study, we established an artificial nerve graft by loading an HHK skeleton with activated Schwann cells. We found that the longitudinal HHK microfilament structure provided adhesion medium, space and direction for Schwann cells, and promoted Schwann cell growth and nerve fiber regeneration. In addition, interleukin-1β not only activates Schwann cells, but also strengthens their activity and increases the expression of nerve growth factors. Activated Schwann cells activate macrophages, and activated macrophages secrete interleukin-1β, which maintains the activity of Schwann cells. Thus, a beneficial cycle forms and promotes nerve repair. Furthermore, our studies have found that the newly constructed artificial nerve graft promotes the improvements in nerve conduction function and motor function in rats with sciatic nerve injury, and increases the expression of nerve injury repair factors fibroblast growth factor 2 and human transforming growth factor B receptor 2. These findings suggest that this artificial nerve graft effectively repairs peripheral nerve injury. 展开更多
关键词 artificial nerve graft bioactive human hair keratin INTERLEUKIN-1Β MACROPHAGES nerve graft nerve growth factor nerve repair peripheral nervous injury Schwann cells
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Effect of Human Umbilical Cord Mesenchymal Stem Cells on GRP78/ATF4 Pathway in Alzheimer s Disease Model Mice
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作者 Fuhong LI Tianyu WANG +3 位作者 Junjie CAI Zhuorui HE Yufan ZANG Liqun REN 《Medicinal Plant》 2023年第6期67-70,共4页
[Objectives]To study the effect of human umbilical cord mesenchymal stem cells(hUC-MSCs)on GRP78/ATF4 pathway in APP/PS1 mice.[Methods]Twelve 6-month-old female APP/PS1 mice were randomly divided into model group(MOD,... [Objectives]To study the effect of human umbilical cord mesenchymal stem cells(hUC-MSCs)on GRP78/ATF4 pathway in APP/PS1 mice.[Methods]Twelve 6-month-old female APP/PS1 mice were randomly divided into model group(MOD,n=6)and human umbilical cord mesenchymal stem cell treatment group(MSC,n=6);six 6-month-old C57BL/6N mice were used as control group(CON,n=6).The mice in each group were treated with the fourth generation of human umbilical cord mesenchymal stem cells through tail vein.Four weeks later,the mice in each group were killed.The expression of GFP78 and ATF4 in the cortex of mice in each group was detected by Western blotting and real-time fluorescence quantitative PCR.[Results]The results of immunoblotting and real-time fluorescence quantitative PCR showed that the expression of GRP78 in MOD group was lower than that in CON group and the expression of ATF4 increased.The expression of GRP78 protein in MSC group was higher than that in MOD group,but the expression of ATF4 protein was lower.The results of real-time fluorescence quantitative PCR showed that the mRNA level of GRP78 decreased and the mRNA level of ATF4 increased in MOD group compared with CON group.The mRNA level of GRP78 in MSC group was higher than that in MOD group,while the mRNA level of ATF4 in MSC group was lower than that in MOD group.[Conclusions]Human umbilical cord mesenchymal stem cells can regulate the expression of GRP78/ATF4 pathway in APP/PSI mice,which may be related to the stress level of endoplasmic reticulum in the brain of APP/PS1 mice mediated by human umbilical cord mesenchymal stem cells. 展开更多
关键词 Alzheimer s disease human umbilical cord mesenchymal stem cells APP/PS1 mice Endoplasmic reticulum stress
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TET1 knockdown inhibits the odontogenic differentiation potential of human dental pulp cells 被引量:8
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作者 Li-Jia Rao Bai-Cheng Yi +1 位作者 Qi-Meng Li Qiong Xu 《International Journal of Oral Science》 SCIE CAS CSCD 2016年第2期110-116,共7页
Human dental pulp cells (hDPCs) possess the capacity to differentiate into odontoblast-like cells and generate reparative dentin in response to exogenous stimuli or injury. Ten-eleven translocation 1 (TET1) is a n... Human dental pulp cells (hDPCs) possess the capacity to differentiate into odontoblast-like cells and generate reparative dentin in response to exogenous stimuli or injury. Ten-eleven translocation 1 (TET1) is a novel DNA methyldioxygenase that plays an important role in the promotion of DNA demethylation and transcriptional regulation in several cell lines. However, the role of TET1 in the biological functions of hDPCs is unknown. To investigate the effect of TET1 on the proliferation and odontogenic differentiation potential of hDPCs, a recombinant shRNA lentiviral vector was used to knock down TET1 expression in hDPCs. Following TET1 knockdown, TET1 was significantly downregulated at both the mRNA and protein levels. Proliferation of the hDPCs was suppressed in the TET1 knockdown groups. Alkaline phosphatase activity, the formation of mineralized nodules, and the expression levels of DSPP and DMP1 were all reduced in the TETl-knockdown hDPCs undergoing odontogenic differentiation. Based on these results, we concluded that TET1 knockdown can prevent the proliferation and odontogenic differentiation of hDPCs, which suggests that TET1 may play an important role in dental pulp repair and regeneration. 展开更多
关键词 DNA demethylation human dental pulp cell KNOCKDOWN odontogenic differentiation ten-eleven translocation 1
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Expression of E-selectin, integrinβ_1 and immunoglobulin superfamily member in human gastric carcinoma cells and its clinicopathologic significance 被引量:23
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作者 Jin-Jing Ke Qin-Shu Shao Zhi-Qiang Ling 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第22期3609-3611,共3页
AIM: To study the expression levels of E-selectin, integrin β1 and immunoglobulin supperfamily memberintercellular adhesion molecule-1 (ICAM-1) in human gastric carcinoma cells, and to explore the relationship bet... AIM: To study the expression levels of E-selectin, integrin β1 and immunoglobulin supperfamily memberintercellular adhesion molecule-1 (ICAM-1) in human gastric carcinoma cells, and to explore the relationship between these three kinds of cell adhesion molecules and gastric carcinoma. METHODS: The serum contents of E-selectin, integrin β1 and ICAM-1 were detected by enzyme-linked immunosorbent assay (ELISA), in 47 healthy individuals (control group) and in 57 patients with gastric carcinoma (gastric carcinoma group) respectively prior to operation and 7 d after operation. RESULTS: The serum E-selectin, ECAM-1 and integrin β1 were found to be expressed in both control and gastric carcinoma groups. However, they were highly expressed in patients with gastric carcinoma patients before operation or with unresectable tumours. The expression levels of ICAM-1 and integrin β1 were significantly higher in gastric carcinoma patients than in controls (P 〈 0.01). A comparison of the E-selectin levels between the two groups showed statistically insignificant differnce (P = 0.64). In addition, the expression levels were all decreased substantially in the postoperative patients subjected to radical resection of the tumours, indicating that the high level expressions of these compounds might be the important factor for predicting the prognosis of these patients. CONCLUSION: Serum E-selectin, ICAM-1 and integrin β1 expression levels are probably related to the metastasis and relapse of gastric cancer. 展开更多
关键词 human gastric carcinoma cells E-SELECTIN Integrin β1 ICAM-1 ELISA
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Expression of dectin-1 during fungus infection in human corneal epithelial cells 被引量:6
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作者 Cui Li Gui-Qiu Zhao +6 位作者 Cheng-Ye Che Na Li Jing Lin Qiang Xu Qian Wang Ying Liu Sheng Qiu 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2014年第1期34-37,共4页
AIM: To evaluate the expression of dendritic cell-associated C-type lectin-1(dectin-1) in human corneal epithelial(HCE) cells infected by fungus. · METHODS: A total of 20 cases of healthy donor corneas were group... AIM: To evaluate the expression of dendritic cell-associated C-type lectin-1(dectin-1) in human corneal epithelial(HCE) cells infected by fungus. · METHODS: A total of 20 cases of healthy donor corneas were group A,and 20 patients(20 eyes) suffered from fungal keratitis(FK) composed group B. Real-time qPCR and immunohistochemistry were applied to detect dectin-1 expression in corneal epithelium of both groups. HCE cells were cultured with aspergillus fumigatus(AF) antigens in vitro. The expression of dectin-1 mRNA was measured by real-time qPCR at the stimulation of 0,4,8 and 24h separately. Dectin-1 protein was detected by immunocytochemistry at 0 and 24h separately. ·RESULTS: Dectin-1 expressed in corneal epithelium of normal persons and FK patients. Vitro cellular experiment showed that the expression of dectin-1 mRNA in HCE cells began to increase after stimulation of AF antigens at 4h,and dectin-1 protein expression increased after stimulation at 24h. · CONCLUSION: Dectin-1 expressed in corneal epithelium of normal persons. AF antigens stimulation can elevate the expression of dectin-1 in HCE cells in vitro. 展开更多
关键词 DECTIN-1 corneal epithelial cells fungal keratitis human
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The effects of microRNA-34a regulating Notch-1/NF-κB signaling pathway on lipopolysaccharide-induced human umbilical vein endothelial cells 被引量:13
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作者 Yun Ge Man Huang Yue-feng Ma 《World Journal of Emergency Medicine》 CAS 2017年第4期292-296,共5页
BACKGROUND: Notch-1/NF-κB signaling plays a key role in the cecal ligation and puncture(CLP)-induced sepsis. This study aims to investigate the intervention effects of microRNA-34a(miR-34a) lentivirus regulating Notc... BACKGROUND: Notch-1/NF-κB signaling plays a key role in the cecal ligation and puncture(CLP)-induced sepsis. This study aims to investigate the intervention effects of microRNA-34a(miR-34a) lentivirus regulating Notch-1/NF-κB signaling pathway on lipopolysaccharide(LPS)-induced human umbilical vein endothelial cells(HUVEC).METHODS: HUVEC were divided into four groups as the following: they were infected with negative control lentivirus(NC group) or miR-34a lentivirus(OE group); LPS(1 g/mL) was added on the third day on the basis of NC group and OE group for 24 hours(NC+LPS group or OE+LPS group). The levels of TNF-α, IL-1β, IL-6, and IL-10 in the cell supernatants, and the mRNA and protein expression of Notch-1 and NF-κB in the HUVEC were evaluated.RESULTS: After 24 hours, the levels of TNF-α, IL-1β, IL-6 in the cell supernatants and the protein expression of NF-κB from NC+LPS group were significantly higher than those of NC group, but IL-10 level and the protein expression of Notch-1 in NC+LPS group were the opposite. After intervention of miR-34a lentivirus, the cell supernatants TNF-α and the protein expression of NF-κB in OE+LPS group after 24 hours markedly decreased compared to NC+LPS group. While the cell supernatants IL-1β and IL-6 and the mRNA expression of NF-κB slightly decreased in OE+LPS group, IL-10 and the mRNA and protein expression of Notch-1 were the opposite.CONCLUSION: miR-34a regulating Notch-1/NF-κB signaling pathway can reduce the HUVEC damage caused by LPS stimulation. 展开更多
关键词 MicroRNA-34a NOTCH-1 NF-κB LENTIVIRUS human UMBILICAL VEIN ENDOTHELIAL cells
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High Glucose Promotes the CTGF Expression in Human Mesangial Cells via Serum and Glucocorticoid-induced Kinase 1 Pathway 被引量:4
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作者 王全胜 张阿丽 +5 位作者 李仁康 刘建国 谢纪文 邓安国 冯玉锡 朱忠华 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2008年第5期508-512,共5页
The role of serum and glucocorticoid-induced kinase 1 (SGK1) pathway in the connective tissue growth factor (CTGF) expression was investigated in cultured human mesangial cells (HMCs) under high glucose. By usin... The role of serum and glucocorticoid-induced kinase 1 (SGK1) pathway in the connective tissue growth factor (CTGF) expression was investigated in cultured human mesangial cells (HMCs) under high glucose. By using RT-PCR and Western blot, the effect of SGK1 on the CTGF expression in HMCs under high glucose was examined. Overexpression of active SGK1 in HMCs transfected with PIRES2-EGFP- S422D hSGK1 (SD) could increase the expression of phosphorylated SGK1 and CTGF as compared with HMCs groups transfected with PIRES2-EGFP (FP) under high glucose or normal glucose. Overexpression of inactive SGK1 in HMCs transfected with PIRES2-EGFP- K127N hSGK1 (KN) could decrease phosphorylated SGK1 and CTGF expression as compared with HMCs groups transfected with FP under high glucose. In conclusion, these results suggest that high glucose-induced CTGF expression is mediated through the active SGK1 in HMCs. 展开更多
关键词 high glucose serum and glucocorticoid-induced protein kinase 1 human mesangial cells connective tissue growth factor diabetic nephropathy
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Inhibitory Effects of Ginsenoside Rb1 on Apoptosis Caused by HSV-1 in Human Glioma Cells 被引量:5
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作者 Yuan-Yuan Liang Bin Wang +4 位作者 Dong-Meng Qian Ling Li Zhi-Hao Wang Ming Hu Xu-Xia Song 《Virologica Sinica》 CAS CSCD 2012年第1期19-25,共7页
To investigate the inhibitory effects of Ginsenoside Rbl (GRbl) on apoptosis caused by Herpes Simplex Virus-1 (HSV-1) in Human Glioma Cells (U251), U251 cells were infected by HSV-1 at a multiplicity of infectio... To investigate the inhibitory effects of Ginsenoside Rbl (GRbl) on apoptosis caused by Herpes Simplex Virus-1 (HSV-1) in Human Glioma Cells (U251), U251 cells were infected by HSV-1 at a multiplicity of infection of 5 and GRbl, GRbl+HSV-1, HSV-1 and control groups. MTT and cell apoptosis assays were used to detect the inhibitory effects of GRbl on the apoptosis of U251 cells that caused by HSV-1 infection for various concentrations of drug and virus treatments by MTT assay. We found that in the 400 μg/mL GRb 1 and 400 μg/mL GRbl+HSV-1 groups, MTT values were higher than control group at all times (P〈0.05). Moreover, the apoptosis rate in the 400 μg/mL GRbl+HSV-1 group was lower than the HSV-1 group (P〈0. 05). These results confirmed that, at appropriate concentrations, GRbl could inhibit nerve cell apoptosis in HSV-1 infections. 展开更多
关键词 Ginsenoside Rb 1 Herpes Simplex Virus-1 human Glioma cells APOPTOSIS
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Herbal compound 861 regulates mRNA expression of collagen synthesis- and degradation-related genes in human hepatic stellate cells 被引量:6
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作者 Lin Wang Jlan Wang +2 位作者 Xue-Hai Tan Bao-En Wang Pei-Gen Xiao 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第11期1790-1794,共5页
AIM: To identify the role of herbal compound 861 (Cpd 861) in the regulation of mRNA expression of collagen synthesis- and degradation-related genes in human hepatic stellate cells (HSCs). METHODS: mRNA levels o... AIM: To identify the role of herbal compound 861 (Cpd 861) in the regulation of mRNA expression of collagen synthesis- and degradation-related genes in human hepatic stellate cells (HSCs). METHODS: mRNA levels of collagen types I and III, matrix metalloproteinase 1 (MMP-1), matrix metalloproteinase 2 (MMP-2), membrane type-1 matrix metalloproteinase (MT1-MMP), tissue inhibitor of metalloproteinase 1 (TIMP-1), and transforming growth factor β1 (TGF-β1) in cultured-activated HSCs treated with Cpd 861 or interferon-γ, (IFN-γ,) were determined by real-time PCR. RESULTS: Both Cpd 861 and IFN-γ reduced the mRNA levels of collagen type Ⅲ, MMP-2 and TGF-β1. Moreover, Cpd 861 significantly enhanced the MMP-1 mRNA levels while down-regulated the TIMP-1 mRNA expression, increasing the ratio of MMP-1 to TIMP-1 to (6.3 + 0.3)- fold compared to the control group. CONCLUSION: The anti-fibrosis function of Cpd 861 may be mediated by both decreased interstitial collagen sythesis by inhibiting the transcription of collagen type Ⅲ and TGF-β1 and increased degradation of these collagens by up-regulating MMP-1 and down-regulating TIMP-1 mRNA levels. 展开更多
关键词 Herbal Compound 861 human hepatic stellate cells Collagen synthesis and degration Collagen type Matrix metalloproteinase 1 Tissue inhibitor of metalloproteinase 1
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The role of Dectin-1/Raf-1 signal cascade in innate immune of human corneal epithelial cells against Aspergillus fumigatus infection 被引量:2
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作者 Gui-Qiu Zhao Jing Lin +4 位作者 Li-Ting Hu Xiao-Ni Yin Qian Wang Qiang Xu Hui Li 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2016年第10期1371-1375,共5页
AIM: To investigate the expression of the v-raf-1murine leukemia viral oncogene homolog 1(Raf-1) and its role in the innate immune response of human corneal epithelial cells(HCECs) infected by Aspergillus fumigat... AIM: To investigate the expression of the v-raf-1murine leukemia viral oncogene homolog 1(Raf-1) and its role in the innate immune response of human corneal epithelial cells(HCECs) infected by Aspergillus fumigatus.METHODS: HCECs were cultured in vitro.They were randomly divided into 4 groups,including control group,Aspergillus fumigatus group,GW5074(an inhibitor of Raf-1) group and Laminarin [an inhibitor of Dendriti-cell-associated C-type lectin 1(Dectin-1)] group.The protein expression level of total Raf-1 and p-Raf-1 was measured by Western blot.The expression of IL-6 and IL-8 m RNA in each group was detected by real-time polymerase chain reaction.RESULTS: In Aspergillus fumigatus group,total Raf-1 protein levels in HCECs remained unchanged at 5,15,30 and 45min after infection,while p-Raf-1 expression was significantly enhanced at 30 min after infection compared with control group.However,the expression of p-Raf-1 was apparently declined after treated with GW5074 or Laminarin compared with Aspergillus fumigatus group.The expression levels of IL-6,IL-8 m RNA were significantly increased after stimulation with fumigatus compared with control group.Pre-treated with GW5074 significantly inhibited Aspergillus fumigatus-induced upregulation of IL-8 and IL-6.CONCLUSION: Aspergillus fumigatus stimulation can elevate the expression of p-Raf-1 in HCECs in vitro.Dectin-1/Raf-1 signal pathway may play a role on regulating the expression of inflammatory cytokines,including IL-6 and IL-8. 展开更多
关键词 Dectin-1/Raf-1 signal pathway Aspergillus fumigatus innate immune human corneal epithelial cells
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Alterative Expression and Sequence of Human Elongation Factor-1δ during Malignant Transformation of Human Bronchial Epithelial Cells Induced by Cadmium Chloride 被引量:2
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作者 YI-XIONG LEI MIN WANG +2 位作者 LIAN WEI XI LU HUA-ZHAO LIN 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2010年第2期151-157,共7页
Objective To study the alternative expression and sequence of human elongation factor-1δ (human EF-1δ p31) during malignant transformation of human bronchial epithelial cells induced by cadmium chloride (CdCl2) ... Objective To study the alternative expression and sequence of human elongation factor-1δ (human EF-1δ p31) during malignant transformation of human bronchial epithelial cells induced by cadmium chloride (CdCl2) and its possible mechanism. Methods Total RNA was isolated at different stages of transformed human bronchial epithelial cells (16HBE) induced by CdCl2 at a concentration of 5.0 μM. Special primers and probe for human EF-1δ p31 were designed and expression of human EF-18 mRNA from different cell lines was detected with fluorescent quantitative PCR technique. EF-18 cDNA from different cell lines was purified and cloned into pMD 18-T vector followed by confirming and sequencing analysis. Results The expressions of human EF-1δ p31 at different stages of 16HBE cells transformed by CdCl2 was elevated (P〈0.01 or P〈0.05). Compared with their corresponding non-transformed ceils, the overexpression level of EF-15 p31 was averagely increased 2.9 folds in Cd-pretransformed cells, 4.3 folds in Cd-transformed ceils and 7.2 folds in Cd-tumorigenic cells. No change was found in the sequence of overexpressed EF-1δ p31 at different stages of 16HBE cells transformed by CdCl2. Conclusion Overexpression of human EF-1δ p31 is positively correlated with malignant transformation of 16HBE cells induced by CdCl2, but is not correlated with DNA mutations. 展开更多
关键词 human elongation factor-1δ Cadmium chloride human bronchial epithelial cells cell transformation Sequencing analysis
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