YAKHAK HOEJI (약학회지)

The Pharmaceutical Society of Korea (대한약학회)
권호 표지

Intensive Proteomic Approach to Identify Secreted Peptides/Proteins from 3T3-L1 Adipocytes using Gel Electrophoresis and Liquid Chromatograph Separation Methods

젤 전기영동 및 액체 크로마토그래피 분리 방법을 이용하여 지방 세포로부터 분비되는 단백질들에 대한 프로테오믹스 연구 방법

  • Hwang, Hyun-Ho (Department of Molecular Medicine, School of Medicine, Kyungpook National University) ;
  • Baek, Moon-Chang (Department of Molecular Medicine, School of Medicine, Kyungpook National University)
  • 황현호 (경북대학교 의과대학 분자의학교실) ;
  • 백문창 (경북대학교 의과대학 분자의학교실)
  • Received : 2011.02.22
  • Accepted : 2011.04.27
  • Published : 2011.06.30
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Abstract

Adipocytes have been known to secrete a number of important proteins called adipokines with roles in energy metabolism, reproduction, cardiovascular function and immunity. In this study we have attempted to identify intensively secretory proteins from 3T3-L1 adipocytes. 3T3-L1 preadipocytes were differentiated into mature adipocytes and then the cells were left in serum-free medium. The supernatant was filtrated and dialyzed. Lyophilized secretome was fractionated by two different methods, 1-D SDS PAGE and RP-FPLC. The tryptic peptides from the gel slices and the FPLC fractions were analyzed by nanoLC/ESI-MS/MS. We identified a total of 303 identical proteins from two methods, 251 proteins from 1-D gel and 184 proteins from RP-FPLC. 86 of them were listed as a secretory protein Finally, we identified many known or unknown secreted proteins existed in the low level including adiponectin, angiotensinogen, bone morphogenetic protein-1 (BMP-1), macrophage migration inhibitory factor (MIF), insulin like growth factor-II (IGF-II), interleukin-6 (IL-6), follistatin-related protein-1, minecan, and resistin. The existence of some of secreted proteins has been confirmed in RNA level. This proteomic experiment is useful for the intensive screening of secretory proteins in many kinds of other cells.

Keywords

References

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