Stem cell pluripotency and differentiation are global processes regulated by several pathways that have been studied intensively over recent years. Nitric oxide(NO) is an important molecule that affects gene expressio...Stem cell pluripotency and differentiation are global processes regulated by several pathways that have been studied intensively over recent years. Nitric oxide(NO) is an important molecule that affects gene expression at the level of transcription and translation and regulates cell survival and proliferation in diverse cell types. In embryonic stem cells NO has a dual role, controlling differentiation and survival, but the molecular mechanisms by which it modulates these functions are not completely defined. NO is a physiological regulator of cell respiration through the inhibition of cytochrome c oxidase. Many researchers have been examining the role that NO plays in other aspects of metabolism such as the cellular bioenergetics state, the hypoxia response and the relationship of these areas to stem cell stemness.展开更多
Genomic imprinting is an epigenetic modification of DNA,whereby gene expression is restricted to either maternally or paternally inherited alleles.Imprinted genes(IGs)in the placenta and embryo are essential for growt...Genomic imprinting is an epigenetic modification of DNA,whereby gene expression is restricted to either maternally or paternally inherited alleles.Imprinted genes(IGs)in the placenta and embryo are essential for growth regulation and nutrient supply.However,despite being an important nutrition delivery organ,studies on mammary gland genomic imprinting remain limited.In this study,we found that both the number of IGs and their expression levels decreased during development of the mouse mammary gland.IG expression was lineage-specific and related to mammary gland development and lactation.Meta-analysis of single-cell RNA sequencing data revealed that mammary gland IGs were co-expressed in a network that regulated cell sternness and differentiation,which was confirmed by our functional studies.Accordingly,our data indicated that IGs were essential for the self-renewal of mammary gland stem cells and IG decline was correlated with mammary gland maturity.Taken together,our findings revealed the importance of IGs in a poorly studied nutrition-related organ,i.e.the mammary gland,thus providing a reference for further studies on genomic imprinting.展开更多
基金Grants from Consejería de Igualdad,Salud y Politicas Sociales,Junta de Andalucía,No.PI105/2010Consejería de Economía,Innovación,Ciencia y Empleo,Junta de Andalucía,No.CTS-7127/2011(to Bedoya FJ)+6 种基金Consejería de Igualdad,Salud y Políticas Sociales,Junta de Andalucía,ISCIII co-funded by Fondos FEDER(RED TERCEL),No.RD06/0010/0025,RD12/0019/0028 and PI10/00964Consejería de Economía,Innovación,Ciencia y Empleo,No.P10.CTS.6505the Ministry of Health and Consumer Affairs(Advanced Therapies Program Grant TRA-120)(to Soria B)Consejería de Igualdad,Salud y Políticas Sociales,No.PI0022/2008Consejería de Economía,Innovación,Ciencia y Empleo,Junta de Andalucía(PAI,BIO311)(to Martín F)Servicio Andaluz de Salud(SAS 11245)Ministerio de Economía y Competitividad-Secretaría de Estado de Investigación Desarrollo e Innovación,No.IPT-2011-1615-900000(to Tejedo JR)
文摘Stem cell pluripotency and differentiation are global processes regulated by several pathways that have been studied intensively over recent years. Nitric oxide(NO) is an important molecule that affects gene expression at the level of transcription and translation and regulates cell survival and proliferation in diverse cell types. In embryonic stem cells NO has a dual role, controlling differentiation and survival, but the molecular mechanisms by which it modulates these functions are not completely defined. NO is a physiological regulator of cell respiration through the inhibition of cytochrome c oxidase. Many researchers have been examining the role that NO plays in other aspects of metabolism such as the cellular bioenergetics state, the hypoxia response and the relationship of these areas to stem cell stemness.
基金This work was supported by the National Key Research and Development Program of China(2016YFA0100900)the National Natural Science Foundation of China(U1802285,31970612,81871403,and 81571738)+3 种基金Yunnan Applied Basic Research Key Projects(2018FA002 and 2015HA026)Key Research and Development Program of Zhejiang Province(2019C03014)Open Project from the State Key Laboratory of Genetic Resources and Evolution(GREKF20-0A)Fundamental Research Funds for the Central Universities.
文摘Genomic imprinting is an epigenetic modification of DNA,whereby gene expression is restricted to either maternally or paternally inherited alleles.Imprinted genes(IGs)in the placenta and embryo are essential for growth regulation and nutrient supply.However,despite being an important nutrition delivery organ,studies on mammary gland genomic imprinting remain limited.In this study,we found that both the number of IGs and their expression levels decreased during development of the mouse mammary gland.IG expression was lineage-specific and related to mammary gland development and lactation.Meta-analysis of single-cell RNA sequencing data revealed that mammary gland IGs were co-expressed in a network that regulated cell sternness and differentiation,which was confirmed by our functional studies.Accordingly,our data indicated that IGs were essential for the self-renewal of mammary gland stem cells and IG decline was correlated with mammary gland maturity.Taken together,our findings revealed the importance of IGs in a poorly studied nutrition-related organ,i.e.the mammary gland,thus providing a reference for further studies on genomic imprinting.