Chromatin structure, epigenetic mechanisms and long-range interactions in the human insulin locus.
Chromatin structure, epigenetic mechanisms and long-range interactions in the human insulin locus.
复制标题
人胰岛素基因座中的染色质结构,表观遗传机理和远距离相互作用。
DOI:
10.1111/j.1463-1326.2012.01645.x
复制
发表时间:
2012-10
期刊:
影响因子:
--
通讯作者:
Felsenfeld G
中科院分区:
文献类型:
--
作者:
Xu Z;Lefevre GM;Felsenfeld G
Regulation of gene expression in eukaryotes is largely dependent on variations in chromatin structure. More recently, it has become clear that this may involve not only local chromatin organization but also distant regulatory elements that participate in large-scale chromatin architecture within the nucleus. We describe recent methods that make possible the detection of such structures and apply them to analysis of the human insulin (INS) locus in pancreatic islets. We show that the INS gene is part of an extended ‘open’ chromatin domain that includes adjacent genes as well. We also find that in islets, the INS promoter is in physical contact with distant sites on the same human chromosome and notably, with the SYT8 gene, located nearly 300 kb away. The strength of the contact between INS and SYT8 is increased by glucose, and this results in stimulation of SYT8 expression. Inhibition of INS transcription decreases SYT8 expression. Furthermore, downregulation of SYT8 results in decreased secretion of insulin. Our results thus establish the existence of a regulatory network between the INS gene and other distant genes through long-range physical interactions, and suggest that such networks may have general importance for insulin biology and diabetes.
登录
查看更多内容
影响因子:
14.9
作者:
FORRESTER, WC;TAKEGAWA, S;GROUDINE, M
通讯作者:
GROUDINE, M
影响因子:
16
作者:
Dillon, N;Trimborn, T;Grosveld, F
通讯作者:
Grosveld, F
影响因子:
30.8
作者:
Horike, S;Cai, ST;Kohwi-Shigematsu, T
通讯作者:
Kohwi-Shigematsu, T
影响因子:
3.5
作者:
Ferguson, Laura A.;Docherty, Hilary M.;Docherty, Kevin
通讯作者:
Docherty, Kevin
影响因子:
64.5
作者:
CHUNG, JH;WHITELEY, M;FELSENFELD, G
通讯作者:
FELSENFELD, G