当前位置： SCI文献检索 > BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS期刊下所有文献 > AGPAT2 deficiency impairs adipogenic differentiation in primary cultured preadipocytes in a non-autophagy or apoptosis dependent mechanism.

AGPAT2 deficiency impairs adipogenic differentiation in primary cultured preadipocytes in a non-autophagy or apoptosis dependent mechanism.

Abstract：

AIMS:Mutations in 1-acylglycerol-3-phosphate O-acyltransferase 2 (AGPAT2) result in lipodystrophy, insulin resistance and diabetes. Autophagy is required for normal adipogenesis and adipose tissue development. The aim of this study was to determine whether impaired autophagy or excessive cell death underlie the adipogenic inability of Agpat2(-/-) mice preadipocytes. METHODS:Preadipocytes were isolated from interscapular brown adipose tissue (BAT) of Agpat2(-/-) and Agpat2(+/+) newborn mice and cultured/differentiated in vitro. Intracellular lipids were quantified by oil red O staining. Cell death was assessed by lactate dehydrogenase (LDH) activity. Apoptosis and autophagy regulatory factors were determined at the mRNA and protein level with Real-time PCR, immunoblot and immunofluorescence. RESULTS:Adipogenically induced Agpat2(-/-) preadipocytes had fewer lipid-loaded cells and lower levels of adipocyte markers than wild type preadipocytes. Before adipogenic differentiation, autophagy-related proteins (ATGs) ATG3, ATG5-ATG12 complex, ATG7 and LC3II were increased but autophagic flux was reduced, as suggested by increased p62 levels, in Agpat2(-/-) preadipocytes. Adipogenic induction increased LDH levels in the culture media in Agpat2(-/-) preadipocytes but no differences were observed in the activation of Caspase 3 or in markers of autophagic flux. CONCLUSIONS:AGPAT2 is required for in vitro adipogenesis of mouse preadipocytes. Autophagy defects or apoptosis are not involved in the adipogenic failure of Agpat2(-/-) preadipocytes.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Fernández-Galilea M,Tapia P,Cautivo K,Morselli E,Cortés VA

doi

10.1016/j.bbrc.2015.09.128

subject

Has Abstract

pub_date

2015-11-06 00:00:00

pages

39-45

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(15)30645-8

journal_volume

467

pub_type

杂志文章

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