Cohesin is implicated in establishing and maintaining pluripotency. Whether this is because of essential cohesin functions in the cell cycle or in gene regulation is unknown. Here we tested cohesin's contribution to reprogramming in systems that reactivate the expression of pluripotency genes in the absence of proliferation (embryonic stem [ES] cell heterokaryons) or DNA replication (nuclear transfer). Contrary to expectations, cohesin depletion enhanced the ability of ES cells to initiate somatic cell reprogramming in heterokaryons. This was explained by increased c-Myc (Myc) expression in cohesin-depleted ES cells, which promoted DNA replicationdependent reprogramming of somatic fusion partners. In contrast, cohesin-depleted somatic cells were poorly reprogrammed in heterokaryons, due in part to defective DNA replication. Pluripotency gene induction was rescued by Myc, which restored DNA replication, and by nuclear transfer, where reprogramming does not require DNA replication. These results redefine cohesin's role in pluripotency and reveal a novel function for Myc in promoting the replication-dependent reprogramming of somatic nuclei.
Cohesin is required for ES cell self-renewal and iPS-mediated reprogramming of somatic cells. This may indicate a special role for cohesin in the regulation of pluripotency genes, perhaps by mediating longrange chromosomal interactions between gene regulatory elements. However, cohesin is also essential for genome integrity, and its depletion from cycling cells induces DNA damage responses. Hence, the failure of cohesin-depleted cells to establish or maintain pluripotency gene expression could be explained by a loss of long-range interactions or by DNA damage responses that undermine pluripotency gene expression. In recent work we began to disentangle these possibilities by analyzing reprogramming in the absence of cell division. These experiments showed that cohesin was not specifically required for reprogramming, and that the expression of most pluripotency genes was maintained when ES cells were acutely depleted of cohesin. Here we take this analysis to its logical conclusion by demonstrating that deliberately inflicted DNA damage -and the DNA damage that results from proliferation in the absence of cohesin -can directly interfere with pluripotency and reprogramming. The role of cohesin in pluripotency and reprogramming may therefore be best explained by essential cohesin functions in the cell cycle.
Background: Syphilis is a sexually transmitted disease (STD) caused by the bacterium treponema pallidum, but little is known about its mechanism of action. In pregnancy it leads to adverse outcomes among more than half of the women with active disease, including early fetal loss, stillbirth, prematurity, low birth weight, neonatal and infant death.Methods: It is an observational study in the department of obstetrics and gynecology Mahatma Gandhi Memorial Medical College Maharaja Yashwant Rao Hospital, Indore between January 2014 to December 2015 total 20870. In Include written informed consent, All the patients attending STI/RTI clinic with clinical diagnosis of STD. In Exclusion criteria include patients not give informed consent. Case definition: All VDRL + TPHA positive patients.Results: Out of 20870 females on which VDRL was performed 77 (0.036%) were found to be positive. The seroprevalence at study hospital thus came out to be 0.036%. These were further confirmed by TPHA and 73 (94.8%) out of 77 samples were positive. A total agreement was seen between TPHA and VDRL with a titer of 1 in 8 and above. Among total 20870 screened females, 77% (16101) were ANC patients of which 26 cases out of 77 that is 33.76% females were syphilis positive.Conclusions: Low prevalence of syphilis in pregnant women and adult general population is very encouraging. participation of people and public health approach to promote awareness of syphilis among physicians and populations at risk in India are very urgently needed to avoid the adverse consequences which could result from undiagnosed or improper treatment.
It has been a long-time endeavour to find out how happiness and prosociality are related in psychological research. Prosocial behaviour and Happiness are the key factors to determine the mental, physical, and social health of an individual. In general, Prosocial Behaviour is to assist somebody without expecting anything consequently preferring caring, money, cast, mindful, and so forth. Atkinson (1965) has defined it as any action performed to benefit another person. Happiness is an inherent feeling at any point of time that a person feels like joy, contentment, and satisfaction. These two ways of behaving influence the activities or actions of the person or an individual. The aim of the research was to investigate the relationship between Prosocial Behaviour and Happiness among male and female adults. A sample of 126 adults between the ages group 19-45 were included in the study. For this purpose, Prosocialness Scale for Adults (PSA) and Oxford Happiness Questionnaire were used. Findings show significant positive relationship and difference in males and females exist in their level of prosocial behaviour and happiness. Further, it was found that the prosociality in an individual is very vital during the growing stage as well and its foundation usually social interaction within family, peers, and friends.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.