Histone deacetylase inhibition attenuates diabetes-associated kidney growth: potential role for epigenetic modification of the epidermal growth factor receptor.

Abstract:

:Clinical trials and experimental studies have highlighted the importance of epigenetic processes in the development of diabetic complications. One of the earliest features of diabetic nephropathy is renal enlargement. The epidermal growth factor (EGF) has a pivotal role in the development of diabetic nephromegaly and transactivation of its receptor has been implicated in the pathogenesis of later-stage disease. As EGF signaling is altered by the acetylation status of histone proteins, we measured the effects of the histone deacetylase (HDAC) inhibitor, vorinostat, in mediating renal enlargement in diabetes focusing on the EGF-EGF receptor (EGFR) axis. In cultured proximal tubule (normal rat kidney) cells, vorinostat treatment reduced EGFR protein and mRNA, and attenuated cellular proliferation. Within 72 h of diabetes induction with streptozotocin, urinary EGF excretion was increased approximately threefold and was unaffected by vorinostat, even though the kidneys of vorinostat-treated diabetic rats had reduced tubular epithelial cell proliferation. Daily treatment of diabetic rats with vorinostat for 4 weeks blunted renal growth and glomerular hypertrophy. Thus, early renal changes in diabetes are amenable to epigenetic intervention. Attenuating effects of HDAC inhibition, although multifactorial, are likely to be mediated in part through downregulation of the EGFR.

journal_name

Kidney Int

journal_title

Kidney international

authors

Gilbert RE,Huang Q,Thai K,Advani SL,Lee K,Yuen DA,Connelly KA,Advani A

doi

10.1038/ki.2011.39

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

1312-21

issue

12

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(15)54746-7

journal_volume

79

pub_type

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