title: Comparative analysis of the secretory proteome of human adipose stromal vascular fraction cells during adipogenesis.
abstract: Adipogenesis is a complex process that is accompanied by a number of molecular events. In this study, a proteomic approach was adopted to identify secretory factors associated with adipogenesis. A label-free shotgun proteomic strategy was implemented to analyze proteins secreted by human adipose stromal vascular fraction cells and differentiated adipocytes. A total of 474 proteins were finally identified and classified according to quantitative changes and statistical significances. Briefly, 177 proteins were significantly upregulated during adipogenesis (Class I), whereas 60 proteins were significantly downregulated (Class II). Changes in the expressions of several proteins were confirmed by quantitative RT-PCR and immunoblotting. One obvious finding based on proteomic data was that the amounts of several extracellular modulators of Wnt and transforming growth factor-beta (TGF-beta) signaling changed during adipogenesis. The expressions of secreted frizzled-related proteins, dickkopf-related proteins, and latent TGF-beta-binding proteins were found to be altered during adipogenesis, which suggests that they participate in the fine regulation of Wnt and TGF-beta signaling. This study provides useful tools and important clues regarding the roles of secretory factors during adipogenic differentiation, and provides information related to obesity and obesity-related metabolic diseases.
authors: Division of Molecular and Life Science, Pohang University of Science and Technology, Pohang, Republic of Korea.
authors: Jaeyoon
authors: J
authors: Kim
authors: Yoon Sup
authors: YS
authors: Choi
authors: Seyoung
authors: S
authors: Lim
authors: Kyungmoo
authors: K
authors: Yea
authors: Jong Hyuk
authors: JH
authors: Yoon
authors: Dong-Jae
authors: DJ
authors: Jun
authors: Sang Hoon
authors: SH
authors: Ha
authors: Jung-Wook
authors: JW
authors: Kim
authors: Jae Ho
authors: JH
authors: Kim
authors: Pann-Ghill
authors: PG
authors: Suh
authors: Sung Ho
authors: SH
authors: Ryu
authors: Taehoon G
authors: TG
authors: Lee
mesh_terms: D017667:Adipocytes / Q000166:cytology / Q000378:metabolism* / Q000502:physiology; D050156:Adipogenesis / Q000235:genetics / Q000502:physiology*; D002454:Cell Differentiation / Q000502:physiology; D002458:Cell Fractionation; D002478:Cells, Cultured; D006801:Humans; D020543:Proteome / Q000235:genetics / Q000378:metabolism*; D017154:Stromal Cells / Q000166:cytology / Q000378:metabolism*; D050151:Subcutaneous Fat / Q000166:cytology*
chemical_list: D020543:Proteome