Adipose triglyceride lipase regulates basal lipolysis and lipid droplet size in adipocytes.
Adipose triglyceride lipase regulates basal lipolysis and lipid droplet size in adipocytes.
复制标题
DOI:
10.1002/jcb.21964
复制
发表时间:
2008-12-15
影响因子:
4
通讯作者:
Greenberg, Andrew S.
中科院分区:
文献类型:
--
作者:
Miyoshi, Hideaki;Perfield, James W., II;Obin, Martin S.;Greenberg, Andrew S.
In adipocytes, lipid droplet (LD) size reflects a balance of triglyceride synthesis (lipogenesis) and hydrolysis (lipolysis). Perilipin A (Peri A), is the most abundant phosphoprotein on the surface of adipocyte LDs and has a crucial role in lipid storage and lipolysis. Adipose triglyceride lipase (ATGL) and hormone-sensitive lipase (HSL) are the major rate-determining enzymes for lipolysis in adipocytes. Each of these proteins (Peri A, ATGL and HSL) have been demonstrated to regulate lipid storage and release in the adipocyte. However, in the absence of PKA stimulation (basal state), the lipases (ATGL and HSL) are located mainly in the cytoplasm, and their contribution to basal rates of lipolysis and influence on LD size are poorly understood. In this study, we utilize an adenoviral system to knockdown or overexpress ATGL and HSL in an engineered model system of adipocytes in the presence or absence of Peri A. We are able to demonstrate in our experimental model system, that in the basal state, LD size, triglyceride storage, and fatty acid release are mainly influenced by expression of ATGL. These results demonstrate for the first time the relative contributions of ATGL, HSL, and Peri A on determination of LD size in the absence of PKA-stimulation.
登录
查看更多内容
影响因子:
15.9
作者:
Crossno, Joseph T., Jr.;Majka, Susan M.;Klemm, Dwight J.
通讯作者:
Klemm, Dwight J.
影响因子:
10.5
作者:
Rosen, ED;Hsu, CH;Spiegelman, BM
通讯作者:
Spiegelman, BM
影响因子:
56.9
作者:
Haemmerle, G;Lass, A;Zechner, R
通讯作者:
Zechner, R
影响因子:
4.8
作者:
Brasaemle, DL;Rubin, B;Londos, C
通讯作者:
Londos, C
影响因子:
4.8
作者:
Haemmerle, G;Zimmermann, R;Zechner, R
通讯作者:
Zechner, R