Deep subcutaneous adipose tissue: A distinct abdominal adipose depot

被引:95
作者
Walker, Gillian E.
Verti, Barbara
Marzullo, Paolo
Savia, Guilio
Mencarelli, Monica
Zurleni, Francesco
Liuzzi, Antonio
Di Blasio, Anna Maria
机构
[1] Ist Auxol Italiano, IRCCS, Mol Biol Lab, I-28921 Oggebbio, VB, Italy
[2] Ist Auxol Italiano, IRCCS, Div Internal Med, I-28921 Oggebbio, VB, Italy
[3] Osped Circolo Busto Arsizio, Busto Arsizio, Italy
关键词
superficial subcutaneous; deep subcutaneous; visceral; preadipocytes; adipocytes;
D O I
10.1038/oby.2007.231
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: Abdominal visceral (VAT) and subcutaneous adipose tissue (SAT) display significant metabolic differences. with VAT showing a functional association to metabolic/cardiovascular disorders. A third abdominal adipose layer, derived by the division of SAT and identified as deep Subcutaneous adipose tissue (dSAT), may play a significant and independent metabolic role. The aim of this study was to evaluate depot-specific differences in the expression of proteins key to adipocyte metabolism in a lean population to establish a potential physiologic role for dSAT. Research Methods and Procedures: Adipocytes and preadipocytes were isolated from whole biopsies taken from superficial SAT (sSAT), dSAT. and VAT samples obtained from 10 healthy normal weight patients (7 women and 3 men), with a mean age of 56.4 +/- 4.04 years and a mean 2 BMI of 23.1 +/- 0.5 kg/m(2). Samples were evaluated for depot-specific differences in insulin sensitivity using adiponectin, glucose transport protein 4 (GLUT4), and resistin mRNA and protein expression, glucocorticoid metabolism by 11 beta-hydroxysteroid clehydrogenase type- 1 (11 beta-HSD1) expression. and alterations in the adipokines leptin and tumor necrosis factor-a TNF-alpha. Results: Although no regional differences in expression were observed for adiponectin or TNF-alpha, dSAT whole biopsies and adipocytes, while intermediary to both sSAT and VAT, reflected more of the VAT expression profile of 11 beta-HSD1, leptin, and resistin. Only in the case of the intracellular pool of GLUT4 proteins in whole biopsies was an independent pattern of expression observed for dSAT. In an evaluation of the homeostatic model, dSAT to 11 beta-HSD1 protein (r = 0.9573, p = 0.0002) and TNF-alpha mRNA (r = 0.8210, p = 0.0236) correlated positively to the homeostatic model. Discussion: Overall, dSAT seems to be a distinct abdominal adipose depot supporting an independent metabolic function that may have a potential role in the development of obesity-associated complications.
引用
收藏
页码:1933 / 1943
页数:11
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