dc.contributor |
Universitat de Barcelona |
dc.contributor.author |
Pradas-Juni, Marta |
dc.contributor.author |
Nicod, Nathalie |
dc.contributor.author |
Fernández-Rebollo, Eduardo |
dc.contributor.author |
Gomis, Ramon, 1946- |
dc.date |
2018-02-28T08:43:49Z |
dc.date |
2018-02-28T08:43:49Z |
dc.date |
2014-07-24 |
dc.date |
2018-02-28T08:43:49Z |
dc.identifier.citation |
0888-8809 |
dc.identifier.citation |
655853 |
dc.identifier.uri |
http://hdl.handle.net/2445/120315 |
dc.format |
13 p. |
dc.format |
application/pdf |
dc.language.iso |
eng |
dc.publisher |
Endocrine Society |
dc.relation |
Reproducció del document publicat a: https://doi.org/10.1210/me.2014-1065 |
dc.relation |
Molecular Endocrinology, 2014, vol. 28, num. 9, p. 1558-1570 |
dc.relation |
https://doi.org/10.1210/me.2014-1065 |
dc.rights |
(c) Endocrine Society, 2014 |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Diabetis |
dc.subject |
Expressió gènica |
dc.subject |
Biosíntesi |
dc.subject |
Proteïnes |
dc.subject |
Factors de transcripció |
dc.subject |
Genètica molecular |
dc.subject |
Diabetes |
dc.subject |
Gene expression |
dc.subject |
Biosynthesis |
dc.subject |
Proteins |
dc.subject |
Transcription factors |
dc.subject |
Molecular genetics |
dc.title |
Differential transcriptional and post-translational transcription factor 7-like regulation among nondiabetic individuals and type 2 diabetic patients. |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/publishedVersion |
dc.description.abstract |
Human genetic studies have revealed that the T minor allele of single nucleotide polymorphism rs7903146 in the transcription factor 7-like 2 (TCF7L2) gene is strongly associated with an increased risk of diabetes by 30%-40%. Molecular and clinical studies are of great importance for understanding how this unique variation in TCF7L2 influences type 2 diabetes (T2D) onset and progression. At the molecular level, some studies have been performed in diabetic mice and pancreatic islets from healthy human donors. Whereas TCF7L2 mRNA levels are up-regulated in islets, protein levels are down-regulated. We performed studies on TCF7L2 splicing, mRNA expression, and protein levels in immortalized human lymphocytes from nondiabetic individuals and T2D patients carrying the C/C or the at-risk T/T genotype. Our results show differential expression of TCF7L2 splice variants between nondiabetic and T2D patients carrying the at-risk genotype, as well as differences in protein levels. Therefore, we investigated the regulation of splice variants, and our results propose that splicing of exon 4 is under control of the serine-arginine-rich factor transformer 2 β (TRA2B). Finally, we studied the endoplasmic reticulum stress pathways, looking for a posttranslational explanation. We saw a shift in the activation of these pathways between nondiabetic individuals and T2D patients carrying the at-risk genotype. These results suggest that, in human immortalized lymphocytes carrying the at-risk T/T genotype, first the differential expression of TCF7L2 splice variants implies a regulation, at least for exon 4, by TRA2B and second, the differential protein levels between both T/T carriers point to a different activation of endoplasmic reticulum stress pathways. |