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Comparative proteome analysis of 3T3‐L1 adipocyte differentiation using iTRAQ‐coupled 2D LC‐MS/MS
Author(s) -
Ye Feng,
Zhang Huoming,
Yang YiXuan,
Hu HuaiDong,
Sze Siu Kwan,
Meng Wei,
Qian Jingru,
Ren Hong,
Yang BaoLin,
Luo MingYing,
Wu Xiaoqiong,
Zhu Wu,
Cai WeiJun,
Tong JianBin
Publication year - 2011
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/jcb.23223
Subject(s) - adipogenesis , adipocyte , adipose tissue , adipokine , western blot , microbiology and biotechnology , lipid droplet , proteome , biology , cellular differentiation , chemistry , biochemistry , endocrinology , insulin resistance , insulin , gene
Abstract Adipose tissue is critical in obesity and type II diabetes. Blocking of adipocyte differentiation is one of the anti‐obesity strategies targeting on strong rise in fat storage and secretion of adipokine(s). However, the molecular basis of adipocyte differentiation and its regulation remains obscure. Therefore, we exposed 3T3‐L1 cell line to appropriate hormonal inducers as adipocyte differentiation model. Using iTRAQ‐coupled 2D LC‐MS/MS, a successfully exploited high‐throughput proteomic technology, we nearly quantitated 1,000 protein species and found 106 significantly altered proteins during adipocyte differentiation. The great majority of differentially expressed proteins were related to metabolism enzymes, structural molecules, and proteins involved in signal transduction. In addition to previously reported differentially expressed molecules, more than 20 altered proteins previously unknown to be involved with adipogenic process were firstly revealed (e.g., HEXB, DPP7, PTTG1IP, PRDX5, EPDR1, SPNB2, STEAP3, TPP1, etc.). The partially differential proteins were verified by Western blot and/or real‐time PCR analysis. Furthermore, the association of PCX and VDAC2, two altered proteins, with adipocyte conversion was analyzed using siRNA method, and the results showed that they could contribute considerably to adipogenesis. In conclusion, our data provide valuable information for further understanding of adipogenesis. J. Cell. Biochem. 112: 3002–3014, 2011. © 2011 Wiley‐Liss, Inc.