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Cell differentiation involves widespread epigenetic reprogramming, including modulation of DNA methylation patterns. The differentiation potential differences in DNA methylation patterns might function in pluripotency restriction, while tissue-specific differences might work in lineage restriction. To investigate the effects of neuronal induction on promoter methylation pattern in rat bone marrow mesenchymal stem cells (MSCs), we used bisulfite sequencing to analyze the methylation status of the promoter regions in neuron-specific enolase (NSE), microtubule-associated protein Tau, and Oct4 genes in MSCs pre- and post-chemical induction. Neurocytes from the newborn rat brains were used as control. Data showed that NSE and Tau were abundantly expressed in the brain cells and MSC-derived neurocyte-like cells as well but not in the MSCs. However, both NSE promoter (−214 ∼ +57 bp) and Tau promoter (−239 ∼ +131 bp) were hypomethylated (<4 % CpG methylation). Oct4 was expressed in MSCs, and the Oct4 promoter (−293 ∼ −85 bp) was hypermethylated (>79 % CpG methylation). Interestingly, it was found that the methylation of the locus −113 bp upstream of Oct4 transcription start site was specifically enhanced in the process of MSCs' neuronal differentiation. Further experiments in hepatocytes derived from MSCs and hepar tissue proved that the −113 bp locus methylation increased also in non-neurogenic lineages. Tfsitescan prediction showed that AP-2-alpha/gamma and Sp1 might regulate Oct4 transcription upon MSC differentiation by binding the −113 bp locus. So, we conclude that promoter methylation modifies pluripotency-specific gene, rather than regulates the expression of neural-specific genes when MSCs differentiate into neurocyte-like cells.
Endothelial nitric oxide synthase polymorphism G298T in association with oxidative DNA damage in coronary atherosclerosis
Content Type Journal Article
Category Research Note
Pages 1-4
DOI 10.1007/s12041-012-0183-1
Authors
RAJESH G. KUMAR, Department of Genetics, Osmania Univers ... mehr
A micropropagation protocol was developed for multiplication of seedless lemon (Citrus limon L. cv. Kaghzi Kalan) using nodal explants. The maximum shoot regeneration was observed on low level of BAP (0.1 mg l−1) or kinetin (0.5 mg l−1). BA was recorded to be better than kinetin in terms of ... mehr
The objective of this study was to evaluate the activity, kinetic behavior, and thermal inactivation kinetics of peroxidase (POD) in aqueous extracts from two kinds of milk ripe stage corn, sweet corn and waxy corn. Optimum activities using guaiacol as the hydrogen donor were obtained for s ... mehr
Die Max-Planck-Gesellschaft und Springer haben sich einvernehmlich darauf verständigt, den Wissenschaftlern aller Max-Planck-Institute und Forschungsgruppen den Zugriff auf sämtliche Inhalte der Onlineplattform SpringerLink zu ermöglichen.
Die Vereinbarung umfasst auch Open ChoiceTM, das O ... mehr
Mit mehr als 18.000 elektronischen Laborprotokollen in den Bereichen Life Sciences und Biomedizin hat der Wissenschaftsverlag Springer sein Online-Angebot für Forschungslabors erheblich ausgebaut. Unter dem Namen Springer Protocols finden Wissenschaftler aus Forschungsinstitutionen und Unte ... mehr
Die Max-Planck-Gesellschaft hat nach schwierigen Verhandlungen ihren langjährigen Lizenzvertrag mit dem Springer Verlag zum 31. Dezember 2007 gekündigt. Die Verhandlungen sind gescheitert, weil laut MPG keine Einigung über ein adäquates Verhältnis von Preis und nachhaltigen Leistungen erzie ... mehr