Aim Aging is an independent risk factor for heart disease, however the effective intervention has not been found so far. Bone marrow mesenchymal stem cells （BMSCs） have been shown to offer a wide variety of cel- l...Aim Aging is an independent risk factor for heart disease, however the effective intervention has not been found so far. Bone marrow mesenchymal stem cells （BMSCs） have been shown to offer a wide variety of cel- lular functions including the protective effects on damaged hearts. Here we investigated the antiaging properties of BMSCs and the underlying mechanism in a cellular model of cardiomyocyte senescence and a rat model of aging hearts. Methods In vitro study, neonatal rat ventricular cells （NRVCs） and BMSCs were cocultured in the same dish with a semipermeable membrane to separate the two populations. In vivo, the BMSCs were injected into the rat hearts to observe their antiaging effects. The expression of β-galactosidase and aging-related proteins, and the lev- els of oxidative stress were determined in vivo and in vitro. The heart function was measured by the High-Resolution Imaging System. Results Monocultured NRVCs displayed the senescence-associated phenotypes, characterized by an increase in the number of β-galaetosidase-positive cells and decreases in the degradation and disappearance of cellular organelles in a time-dependent manner. The levels of reactive oxygen species and malondialdehyde were el- evated, whereas the activities of antioxidant enzymes superoxide dismutase and glutathione peroxidase were de- creased, along with upregulation of p53, p21cipl/wafl and p16INK4a in the aging eardiomyoeytes. These deleterious alterations were abrogated in aging NRVCs cocultured with BMSCs. Qualitatively, the same senescent phenotypes were consistently observed in aging rat hearts. Notably, BMSC transplantation significantly prevented these detri- mental alterations and improved the impaired cardiac function in the aging rats. Conclusions BMSCs possess strong antiseneseence action on the aging NRVCs and hearts and can improve cardiac function after transplantation in aging rats. The present study, therefore, provides an alternative approach for the treatment of heart failure in the elderly population.展开更多
Objective:To investigate the effect of SHU555A,a clinically approved iron nanoparticle,labeling on differentiation of bone marrow mesenchymal stem cells(BMSCs) into neurocyte-like cells in vitro.Methods:10 times dilut...Objective:To investigate the effect of SHU555A,a clinically approved iron nanoparticle,labeling on differentiation of bone marrow mesenchymal stem cells(BMSCs) into neurocyte-like cells in vitro.Methods:10 times dilution of 10μl,20μl,40μl and 80μl SHU555A were added to 2ml of culture medium containing rat BMSCs to obtain four experimental groups of SHU555A labeling of BMSCs with ferri ion concentrations of 14μg/ml,28μg/ml,56μg/ml and 112μg/ml,respectively.2ml of culture medium with rat BMSCs did not contain SHU555A served as control group.The BMSCs of all the groups were pre-induced by bFGF,and induced by DMSO/butylated hydroxyanisole(BHA) for six hours,subsequently reverse transcription polymerase chain reaction(RT-PCR) technique was employed to detect mRNA expression of nestin,neuronspecific analase(NSE) and glial fibrillary acid protein(GFAP).Western blot technique was used to detectprotein expression of nestin.Results:Quantitative-PCR revealed high mRNA expression of nestin,NSE and GFAP induced by DMSO/BHA in all the experimental groups,but the difference between the experimental groups and the control group was not significant(P>0.05).Western blot analysis demonstrated there was no statistically significant difference in nestin protein expression between the experimental groups and the control group(P>0.05).Conclusion:SHU555A labeling do not affect differentiation of rat BMSCs into neurocyte-like cells in vitro.展开更多
文摘Aim Aging is an independent risk factor for heart disease, however the effective intervention has not been found so far. Bone marrow mesenchymal stem cells （BMSCs） have been shown to offer a wide variety of cel- lular functions including the protective effects on damaged hearts. Here we investigated the antiaging properties of BMSCs and the underlying mechanism in a cellular model of cardiomyocyte senescence and a rat model of aging hearts. Methods In vitro study, neonatal rat ventricular cells （NRVCs） and BMSCs were cocultured in the same dish with a semipermeable membrane to separate the two populations. In vivo, the BMSCs were injected into the rat hearts to observe their antiaging effects. The expression of β-galactosidase and aging-related proteins, and the lev- els of oxidative stress were determined in vivo and in vitro. The heart function was measured by the High-Resolution Imaging System. Results Monocultured NRVCs displayed the senescence-associated phenotypes, characterized by an increase in the number of β-galaetosidase-positive cells and decreases in the degradation and disappearance of cellular organelles in a time-dependent manner. The levels of reactive oxygen species and malondialdehyde were el- evated, whereas the activities of antioxidant enzymes superoxide dismutase and glutathione peroxidase were de- creased, along with upregulation of p53, p21cipl/wafl and p16INK4a in the aging eardiomyoeytes. These deleterious alterations were abrogated in aging NRVCs cocultured with BMSCs. Qualitatively, the same senescent phenotypes were consistently observed in aging rat hearts. Notably, BMSC transplantation significantly prevented these detri- mental alterations and improved the impaired cardiac function in the aging rats. Conclusions BMSCs possess strong antiseneseence action on the aging NRVCs and hearts and can improve cardiac function after transplantation in aging rats. The present study, therefore, provides an alternative approach for the treatment of heart failure in the elderly population.
基金Henan ontstanding talent program(084200510012)zhou research programs(083SGYS33262-5)zhou university 2011 project,third constraction projection:basic and clinical research of stem cell
文摘Objective:To investigate the effect of SHU555A,a clinically approved iron nanoparticle,labeling on differentiation of bone marrow mesenchymal stem cells(BMSCs) into neurocyte-like cells in vitro.Methods:10 times dilution of 10μl,20μl,40μl and 80μl SHU555A were added to 2ml of culture medium containing rat BMSCs to obtain four experimental groups of SHU555A labeling of BMSCs with ferri ion concentrations of 14μg/ml,28μg/ml,56μg/ml and 112μg/ml,respectively.2ml of culture medium with rat BMSCs did not contain SHU555A served as control group.The BMSCs of all the groups were pre-induced by bFGF,and induced by DMSO/butylated hydroxyanisole(BHA) for six hours,subsequently reverse transcription polymerase chain reaction(RT-PCR) technique was employed to detect mRNA expression of nestin,neuronspecific analase(NSE) and glial fibrillary acid protein(GFAP).Western blot technique was used to detectprotein expression of nestin.Results:Quantitative-PCR revealed high mRNA expression of nestin,NSE and GFAP induced by DMSO/BHA in all the experimental groups,but the difference between the experimental groups and the control group was not significant(P>0.05).Western blot analysis demonstrated there was no statistically significant difference in nestin protein expression between the experimental groups and the control group(P>0.05).Conclusion:SHU555A labeling do not affect differentiation of rat BMSCs into neurocyte-like cells in vitro.
