title: Anti-aging effects of vitamin C on human pluripotent stem cell-derived cardiomyocytes.
abstract: Human pluripotent stem cells (hPSCs) have arisen as a source of cells for biomedical research due to their developmental potential. Stem cells possess the promise of providing clinicians with novel treatments for disease as well as allowing researchers to generate human-specific cellular metabolism models. Aging is a natural process of living organisms, yet aging in human heart cells is difficult to study due to the ethical considerations regarding human experimentation as well as a current lack of alternative experimental models. hPSC-derived cardiomyocytes (CMs) bear a resemblance to human cardiac cells and thus hPSC-derived CMs are considered to be a viable alternative model to study human heart cell aging. In this study, we used hPSC-derived CMs as an in vitro aging model. We generated cardiomyocytes from hPSCs and demonstrated the process of aging in both human embryonic stem cell (hESC)- and induced pluripotent stem cell (hiPSC)-derived CMs. Aging in hESC-derived CMs correlated with reduced membrane potential in mitochondria, the accumulation of lipofuscin, a slower beating pattern, and the downregulation of human telomerase RNA (hTR) and cell cycle regulating genes. Interestingly, the expression of hTR in hiPSC-derived CMs was not significantly downregulated, unlike in hESC-derived CMs. In order to delay aging, vitamin C was added to the cultured CMs. When cells were treated with 100 μM of vitamin C for 48 h, anti-aging effects, specifically on the expression of telomere-related genes and their functionality in aging cells, were observed. Taken together, these results suggest that hPSC-derived CMs can be used as a unique human cardiomyocyte aging model in vitro and that vitamin C shows anti-aging effects in this model.
authors: Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea.
authors: Yoon Young
authors: YY
authors: Kim
authors: Seung-Yup
authors: SY
authors: Ku
authors: Yul
authors: Y
authors: Huh
authors: Hung-Ching
authors: HC
authors: Liu
authors: Seok Hyun
authors: SH
authors: Kim
authors: Young Min
authors: YM
authors: Choi
authors: Shin Yong
authors: SY
authors: Moon
mesh_terms: D000375:Aging / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D000975:Antioxidants / Q000494:pharmacology; D001205:Ascorbic Acid / Q000494:pharmacology*; D002454:Cell Differentiation; D002460:Cell Line; D005500:Follow-Up Studies; D018507:Gene Expression Regulation, Developmental; D006801:Humans; D046529:Microscopy, Electron, Transmission; D032383:Myocytes, Cardiac / Q000187:drug effects* / Q000378:metabolism / Q000648:ultrastructure; D039904:Pluripotent Stem Cells / Q000187:drug effects* / Q000378:metabolism / Q000648:ultrastructure; D012313:RNA / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D035341:Telomeric Repeat Binding Protein 2 / Q000096:biosynthesis / Q000235:genetics
chemical_list: D000975:Antioxidants; C504753:TERF2 protein, human; D035341:Telomeric Repeat Binding Protein 2; D012313:RNA; D001205:Ascorbic Acid