Premature ovarian failure(POF) is a refractory disease for clinical treatment with the goal of restoring fertility. In this study,umbilical cord mesenchymal stem cells on a collagen scaffold(collagen/UC-MSCs) can acti...Premature ovarian failure(POF) is a refractory disease for clinical treatment with the goal of restoring fertility. In this study,umbilical cord mesenchymal stem cells on a collagen scaffold(collagen/UC-MSCs) can activate primordial follicles in vitro via phosphorylation of FOXO3 a and FOXO1. Transplantation of collagen/UC-MSCs to the ovaries of POF patients rescued overall ovarian function, evidenced by elevated estradiol concentrations, improved follicular development, and increased number of antral follicles. Successful clinical pregnancy was achieved in women with POF after transplantation of collagen/UC-MSCs or UC-MSCs. In summary, collagen/UC-MSC transplantation may provide an effective treatment for POF.展开更多
Salvianolic acid A(SalA) is an effective compound extracted from traditional Chinese medicine Salvia miltiorrhiza Bunge. The Forkhead box O3a(FOXO3a) signaling pathway plays crucial roles in the modulation of ischemia...Salvianolic acid A(SalA) is an effective compound extracted from traditional Chinese medicine Salvia miltiorrhiza Bunge. The Forkhead box O3a(FOXO3a) signaling pathway plays crucial roles in the modulation of ischemia-induced cell apoptosis. However, no information about the regulatory effect of SalA on FoxO3a is available. To explore the anti-cerebral ischemia effect and clarify the therapeutic mechanism of SalA, SH-SY5Y cells and Sprague–Dawley rats were applied, which were exposed to oxygen glucose deprivation/reoxygenation(OGD/R) and middle cerebral artery occlusion/reperfusion(MCAO/R) injuries, respectively. The involved pathway was identified using the specific inhibitor LY294002. Results showed that SalA concentration-dependently inhibited OGD/R injury triggered cell viability loss. SalA reduced cerebral infarction, lowered brain edema, improved neurological function, and inhibited neuron apoptosis in MCAO/R rats, which were attenuated by the treatment of phosphatidylinositol-4,5-bisphosphate 3-kinase(PI3K) specific inhibitor LY294002. SalA time-and concentration-dependently upregulated the phosphorylation levels of protein kinase B(AKT) and its downstream protein FOXO3a. Moreover, the nuclear translocation of FOXO3a was inhibited by SalA both in vivo and in vitro, which was also reversed by LY294002. The above results indicated that SalA fought against ischemia/reperfusion damage at least partially via the AKT/FOXO3a/BIM pathway.展开更多
The FOXO3a and FOXM1 forkhead transcription factors are key players in cancer initiation,progression,and drug resistance.Recent research shows that FOXM1 is a direct transcriptional target of FOXO3a,a vital downstream...The FOXO3a and FOXM1 forkhead transcription factors are key players in cancer initiation,progression,and drug resistance.Recent research shows that FOXM1 is a direct transcriptional target of FOXO3a,a vital downstream effector of the PI3K-AKT-FOXO signaling cascade.In addition,FOXM1 and FOXO3a also antagonize each other's activity by competitively binding to the same target genes,which are involved in chemotherapeutic drug sensitivity and resistance.Understanding the role and regulation of the FOXO-FOXM1 axis will provide insight into chemotherapeutic drug action and resistance in patients,and help to identify novel therapeutic approaches as well as diagnostic and predictive biomarkers.展开更多
研究黄芩清热除痹胶囊(HQC)含药血清对类风湿关节炎(RA)患者外周血单核细胞腺苷酸活化蛋白激酶(AMPK)、叉头框蛋白O3a(FoxO3a)蛋白表达的影响,探讨其抗氧化作用机制。通过收集患者和正常人外周抗凝血,用淋巴细胞分离液密度梯度离心法分...研究黄芩清热除痹胶囊(HQC)含药血清对类风湿关节炎(RA)患者外周血单核细胞腺苷酸活化蛋白激酶(AMPK)、叉头框蛋白O3a(FoxO3a)蛋白表达的影响,探讨其抗氧化作用机制。通过收集患者和正常人外周抗凝血,用淋巴细胞分离液密度梯度离心法分离出单核细胞(PBMC),细胞培养取对数期细胞,并用SD大鼠给药灌胃制备含药血清,分为5组[正常组、模型组、AMPK阻断剂组(compound C 10μmol·L^-1)、HQC中剂量+AMPK阻断剂组、HQC中剂量组],根据MTT法检测细胞抑制率。采用ELISA检测IL-1β,IL-4,LPO,MDA,SOD,TAOC水平;Western blot检测AMPK,p-AMPK,p-FoxO3a,FoxO3a蛋白的表达。结果显示,HQC含药血清对外周血人单核细胞有抑制作用,中剂量HQC为最佳浓度,24 h为最佳时间。HQC中剂量组在升高SOD,p-AMPK,p-FoxO3a,降低LPO方面优于模型组、AMPK阻断剂组、HQC中剂量+AMPK阻断剂组;在升高IL-4,TAOC,AMPK,FoxO3a,降低IL-1β,MDA方面优于模型组和AMPK阻断剂组,差异具有统计学意义(P<0.05或P<0.01)。结果表明,HQC含药血清可能通过升高TAOC,SOD水平,降低MDA,LPO水平,激活AMPK,直接磷酸化FoxO3a增强其转录活性,改善RA患者氧化应激状态。展开更多
Alcoholic liver disease(ALD) is one of the major causes of liver morbidity and mortality worldwide. Chronic alcohol consumption leads to development of liver pathogenesis encompassing steatosis, inflammation, fibrosis...Alcoholic liver disease(ALD) is one of the major causes of liver morbidity and mortality worldwide. Chronic alcohol consumption leads to development of liver pathogenesis encompassing steatosis, inflammation, fibrosis, cirrhosis, and in extreme cases, hepatocellular carcinoma. Moreover,ALD may also associate with cholestasis. Emerging evidence now suggests that farnesoid X receptor(FXR) and bile acids also play important roles in ALD. In this review, we discuss the effects of alcohol consumption on FXR, bile acids and gut microbiome as well as their impacts on ALD. Moreover, we summarize the findings on FXR, Fox O3a(forkhead box-containing protein class O3a) and PPARα(peroxisome proliferator-activated receptor alpha) in regulation of autophagy-related gene transcription program and liver injury in response to alcohol exposure.展开更多
Chronic loss of sleep damages health and disturbs the quality of life.Long-lasting sleep deprivation(SD)as well as sleep abnormalities are substantial risk factors for major depressive disorder,although the underlying...Chronic loss of sleep damages health and disturbs the quality of life.Long-lasting sleep deprivation(SD)as well as sleep abnormalities are substantial risk factors for major depressive disorder,although the underlying mechanisms are not clear.Here,we showed that chronic SD in mice promotes a gradual elevation of extracellular ATP,which activates astroglial P2X7 receptors(P2X7Rs).Activated P2X7Rs,in turn,selectively down-regulated the expression of 5-HT2B receptors(5-HT2BRs)in astrocytes.Stimulation of P2X7Rs induced by SD selectively suppressed the phosphorylation of AKT and FoxO3 a in astrocytes,but not in neurons.The overexpression of FoxO3a in astrocytes inhibited the expression of 5-HT2BRs.Down-regulation of 5-HT2BsRs instigated by SD suppressed the activation of STAT3 and relieved the inhibition of Ca2+-dependent phospholipase A2.This latter cascade promoted the release of arachidonic acid and prostaglandin E2.The depression-like behaviors induced by SD were alleviated in P2X7R-KO mice.Our study reveals the mechanism underlying chronic SD-induced depression-like behaviors and suggests 5-HT2BRs as a key target for exploring therapeutic strategies aimed at the depression evoked by sleep disorders.展开更多
基金supported by Strategic Priority Research Program of the Chinese Academy of Sciences (XDA01030501 to Haixiang Sun)National Natural Science Foundation of China (31571189, 81571391, 30900847 to Lijun Ding)+1 种基金Jiangsu Provincial Medical Youth Talent (QNRC2016006)Nanjing Medical Science Development Project (JQX14004, ZKX16042)
文摘Premature ovarian failure(POF) is a refractory disease for clinical treatment with the goal of restoring fertility. In this study,umbilical cord mesenchymal stem cells on a collagen scaffold(collagen/UC-MSCs) can activate primordial follicles in vitro via phosphorylation of FOXO3 a and FOXO1. Transplantation of collagen/UC-MSCs to the ovaries of POF patients rescued overall ovarian function, evidenced by elevated estradiol concentrations, improved follicular development, and increased number of antral follicles. Successful clinical pregnancy was achieved in women with POF after transplantation of collagen/UC-MSCs or UC-MSCs. In summary, collagen/UC-MSC transplantation may provide an effective treatment for POF.
基金supported by grants from National Natural Science Foundation of China (No. 81603100)the CAMS Innovation Fund for Medical Sciences (2017-I2M-1-010, China)
文摘Salvianolic acid A(SalA) is an effective compound extracted from traditional Chinese medicine Salvia miltiorrhiza Bunge. The Forkhead box O3a(FOXO3a) signaling pathway plays crucial roles in the modulation of ischemia-induced cell apoptosis. However, no information about the regulatory effect of SalA on FoxO3a is available. To explore the anti-cerebral ischemia effect and clarify the therapeutic mechanism of SalA, SH-SY5Y cells and Sprague–Dawley rats were applied, which were exposed to oxygen glucose deprivation/reoxygenation(OGD/R) and middle cerebral artery occlusion/reperfusion(MCAO/R) injuries, respectively. The involved pathway was identified using the specific inhibitor LY294002. Results showed that SalA concentration-dependently inhibited OGD/R injury triggered cell viability loss. SalA reduced cerebral infarction, lowered brain edema, improved neurological function, and inhibited neuron apoptosis in MCAO/R rats, which were attenuated by the treatment of phosphatidylinositol-4,5-bisphosphate 3-kinase(PI3K) specific inhibitor LY294002. SalA time-and concentration-dependently upregulated the phosphorylation levels of protein kinase B(AKT) and its downstream protein FOXO3a. Moreover, the nuclear translocation of FOXO3a was inhibited by SalA both in vivo and in vitro, which was also reversed by LY294002. The above results indicated that SalA fought against ischemia/reperfusion damage at least partially via the AKT/FOXO3a/BIM pathway.
文摘The FOXO3a and FOXM1 forkhead transcription factors are key players in cancer initiation,progression,and drug resistance.Recent research shows that FOXM1 is a direct transcriptional target of FOXO3a,a vital downstream effector of the PI3K-AKT-FOXO signaling cascade.In addition,FOXM1 and FOXO3a also antagonize each other's activity by competitively binding to the same target genes,which are involved in chemotherapeutic drug sensitivity and resistance.Understanding the role and regulation of the FOXO-FOXM1 axis will provide insight into chemotherapeutic drug action and resistance in patients,and help to identify novel therapeutic approaches as well as diagnostic and predictive biomarkers.
文摘研究黄芩清热除痹胶囊(HQC)含药血清对类风湿关节炎(RA)患者外周血单核细胞腺苷酸活化蛋白激酶(AMPK)、叉头框蛋白O3a(FoxO3a)蛋白表达的影响,探讨其抗氧化作用机制。通过收集患者和正常人外周抗凝血,用淋巴细胞分离液密度梯度离心法分离出单核细胞(PBMC),细胞培养取对数期细胞,并用SD大鼠给药灌胃制备含药血清,分为5组[正常组、模型组、AMPK阻断剂组(compound C 10μmol·L^-1)、HQC中剂量+AMPK阻断剂组、HQC中剂量组],根据MTT法检测细胞抑制率。采用ELISA检测IL-1β,IL-4,LPO,MDA,SOD,TAOC水平;Western blot检测AMPK,p-AMPK,p-FoxO3a,FoxO3a蛋白的表达。结果显示,HQC含药血清对外周血人单核细胞有抑制作用,中剂量HQC为最佳浓度,24 h为最佳时间。HQC中剂量组在升高SOD,p-AMPK,p-FoxO3a,降低LPO方面优于模型组、AMPK阻断剂组、HQC中剂量+AMPK阻断剂组;在升高IL-4,TAOC,AMPK,FoxO3a,降低IL-1β,MDA方面优于模型组和AMPK阻断剂组,差异具有统计学意义(P<0.05或P<0.01)。结果表明,HQC含药血清可能通过升高TAOC,SOD水平,降低MDA,LPO水平,激活AMPK,直接磷酸化FoxO3a增强其转录活性,改善RA患者氧化应激状态。
基金supported in part by the National Institutes of Health (Nos.R01 AA020518 and R01 DK102142)National Center for Research Resources (No.5P20RR021940)+1 种基金the National Institute of General Medical Sciences (Nos.8P20 GM103549 and T32 ES007079)an Institutional Development Award (IDeA) from the National Institute of General Medical Sciences of the National Institutes of Health (No.P20 GM103418)
文摘Alcoholic liver disease(ALD) is one of the major causes of liver morbidity and mortality worldwide. Chronic alcohol consumption leads to development of liver pathogenesis encompassing steatosis, inflammation, fibrosis, cirrhosis, and in extreme cases, hepatocellular carcinoma. Moreover,ALD may also associate with cholestasis. Emerging evidence now suggests that farnesoid X receptor(FXR) and bile acids also play important roles in ALD. In this review, we discuss the effects of alcohol consumption on FXR, bile acids and gut microbiome as well as their impacts on ALD. Moreover, we summarize the findings on FXR, Fox O3a(forkhead box-containing protein class O3a) and PPARα(peroxisome proliferator-activated receptor alpha) in regulation of autophagy-related gene transcription program and liver injury in response to alcohol exposure.
基金the National Natural Science Foundation of China(81871852,81200935,81671862,and 81871529)Liaoning Revitalization Talents Program(XLYC1807137)+1 种基金the Scientific Research Foundation for Overseas Scholars of the Education Ministry of China(20151098)the Natural Science Foundation of Liaoning Province,China(20170541030)。
文摘Chronic loss of sleep damages health and disturbs the quality of life.Long-lasting sleep deprivation(SD)as well as sleep abnormalities are substantial risk factors for major depressive disorder,although the underlying mechanisms are not clear.Here,we showed that chronic SD in mice promotes a gradual elevation of extracellular ATP,which activates astroglial P2X7 receptors(P2X7Rs).Activated P2X7Rs,in turn,selectively down-regulated the expression of 5-HT2B receptors(5-HT2BRs)in astrocytes.Stimulation of P2X7Rs induced by SD selectively suppressed the phosphorylation of AKT and FoxO3 a in astrocytes,but not in neurons.The overexpression of FoxO3a in astrocytes inhibited the expression of 5-HT2BRs.Down-regulation of 5-HT2BsRs instigated by SD suppressed the activation of STAT3 and relieved the inhibition of Ca2+-dependent phospholipase A2.This latter cascade promoted the release of arachidonic acid and prostaglandin E2.The depression-like behaviors induced by SD were alleviated in P2X7R-KO mice.Our study reveals the mechanism underlying chronic SD-induced depression-like behaviors and suggests 5-HT2BRs as a key target for exploring therapeutic strategies aimed at the depression evoked by sleep disorders.