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Adiponectin inhibits PDGF-induced mesangial cell proliferation: regulation of mammalian target of rapamycin-mediated survival pathway by adenosine 5-monophosphate-activated protein kinase.
Su, Y-X; Deng, H-C; Zhang, M-X; Long, J; Peng, Z-G.
Afiliación
  • Su YX; Department of Endocrinology, The First Affiliated Hospital, Chongqing Medical University, Chongqing, China.
Horm Metab Res ; 44(1): 21-7, 2012 Jan.
Article en En | MEDLINE | ID: mdl-22105511
An aberrant proliferation of mesangial cells (MCs) is one of the more important features of diabetic nephropathy (DN). Adiponectin, an adipocyte-derived hormone, has been associated with type 2 diabetes, a known cause of DN. Recent studies have suggested that adiponectin has a protective effect on the kidney. To elucidate the potential protective mechanism of adiponectin on kidney, we investigated the effects of adiponectin on platelet-derived growth factor (PDGF)-induced cell proliferation and intracellular signaling pathways in cultured Human MCs (HMCs). PDGF-induced HMC proliferation was significantly inhibited by the co-treatment of adiponectin. Adiponectin alone had no effect on HMC proliferation. The mammalian target of rapamycin (mTOR) and 40 S ribosomal S6 kinase 1 (S6K1) were activated by PDGF stimulation in HMCs. PDGF-induced mTOR and S6K1 phosphorylations were significantly attenuated by the co-treatment of adiponectin in HMC. Adiponectin alone had no effects on PDGF-receptor autophosphorylation by PDGF. We also confirmed that the inhibitory effect of adiponectin on PDGF-induced HMC proliferation was significantly suppressed by compound C, an adenosine 5'-monophosphate-activated protein kinase (AMPK) inhibitor. From these findings, it is implied that adiponectin could attenuate renal dysfunction associated with MC disorders through AMPK-mTOR signal pathway.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Transducción de Señal / Proteínas Proto-Oncogénicas c-sis / Células Mesangiales / Adiponectina / Proteínas Quinasas Activadas por AMP / Serina-Treonina Quinasas TOR Límite: Humans Idioma: En Revista: Horm Metab Res Año: 2012 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Transducción de Señal / Proteínas Proto-Oncogénicas c-sis / Células Mesangiales / Adiponectina / Proteínas Quinasas Activadas por AMP / Serina-Treonina Quinasas TOR Límite: Humans Idioma: En Revista: Horm Metab Res Año: 2012 Tipo del documento: Article País de afiliación: China
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