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Horm Metab Res 2010; 42(7): 521-527
DOI: 10.1055/s-0030-1249019
Original Basic

© Georg Thieme Verlag KG Stuttgart · New York

Comparative Proteomic Analysis of Proteins Influenced by Melanin-concentrating Hormone and Melanin-concentrating Hormone Receptor 2 Interaction

Q. Zhang1 , 2 , C.-F. Yuan2 , M.-J. Wu3 , Y.-G. Wang4 , Q. Qin1 , 2 , Y.-Y. Shi2 , G.-L. Liu2 , F.-Z. Song 2
  • 1Department of Clinical Medicine, Chongqing Medical and Pharmaceutical College, Chongqing, China
  • 2Molecular Medicine & Cancer Research Center, Chongqing Medical University, Chongqing, China
  • 3Institute of Life Sciences, Chongqing Medical University, Chongqing, China
  • 4Department of General Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
Weitere Informationen

Publikationsverlauf

received 02.04.2009

accepted after second revision 01.02.2010

Publikationsdatum:
25. März 2010 (online)

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Abstract

Melanin-concentrating hormone receptor 2 (MCHR2), a second G protein-coupled receptor for melanin-concentrating hormone (MCH), has been known for many years. However, its physiological function is poorly understood. To identify the proteins involved in MCHR2 physiological function, a comparative proteomic analysis of protein expression in SH-SY5Y cells stably expressing human MCHR2 (SH-SY5Y-MCHR2) and control SH-SY5Y cells (SH-SY5Y-mock) – both treated with MCH – was conducted. Significant changes were observed in the expression of 34 proteins, including isocitrate dehydrogenase (NAD) subunit alpha, mitochondrial (IDH3A), phosphoenolpyruvate carboxykinase 1 (PCK1), 6-phosphofructo-2-kinase/fructose-2.6-biphosphatase 4 (PFKFB4), insulin-induced gene 2 protein (INSIG2), and acyl-coenzyme A thioesterase 8 (ACOT8). Among the proteins, IDH3A, PCK1, PFKFB4 increased significantly, and INSIG2, ACOT8 decreased significantly in experimental cells compared with control cells; these findings were further confirmed by semi-quantitative RT-PCR and Western blot analysis. The comparative proteome data may provide a valuable clue to further understand MCHR2 physiological function, and several differentially regulated proteins may be used as target proteins for the development of novel drugs.

Key words

melanin-concentrating hormone receptor 2 - SH-SY5Y cells - proteomics - obesity - diabetes mellitus type 2

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Correspondence

Prof. Fang-Zhou Song

Molecular Medicine & Cancer

Research Center

Chongqing Medical University

Chongqing 400016

China

Telefon: +86/23/684 859 58

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eMail: fzsongcq@163.com

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