
| 10.1038/s41419-018-0603-0
http://scihub22266oqcxt.onion/10.1038/s41419-018-0603-0
 C5964068!5964068!29789539
free
free
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Cell+Death+Dis 2018 ; 9 (6): � Nephropedia Template TP
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Proteasomal degradation of the histone acetyl transferase p300 contributes to beta-cell injury in a diabetes environment #MMPMID29789539Ruiz L; Gurlo T; Ravier MA; Wojtusciszyn A; Mathieu J; Brown MR; Broca C; Bertrand G; Butler PC; Matveyenko AV; Dalle S; Costes SCell Death Dis 2018[Jun]; 9 (6): � PMID29789539show ga
In type 2 diabetes, amyloid oligomers, chronic hyperglycemia, lipotoxicity, and pro-inflammatory cytokines are detrimental to beta-cells, causing apoptosis and impaired insulin secretion. The histone acetyl transferase p300, involved in remodeling of chromatin structure by epigenetic mechanisms, is a key ubiquitous activator of the transcriptional machinery. In this study, we report that loss of p300 acetyl transferase activity and expression leads to beta-cell apoptosis, and most importantly, that stress situations known to be associated with diabetes alter p300 levels and functional integrity. We found that proteasomal degradation is the mechanism subserving p300 loss in beta-cells exposed to hyperglycemia or pro-inflammatory cytokines. We also report that melatonin, a hormone produced in the pineal gland and known to play key roles in beta-cell health, preserves p300 levels altered by these toxic conditions. Collectively, these data imply an important role for p300 in the pathophysiology of diabetes.�
  
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