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Article: Adiponectin stimulates Rho-mediated actin cytoskeleton remodeling and glucose uptake via APPL1 in primary cardiomyocytes

TitleAdiponectin stimulates Rho-mediated actin cytoskeleton remodeling and glucose uptake via APPL1 in primary cardiomyocytes
Authors
Issue Date2014
PublisherWB Saunders Co. The Journal's web site is located at http://www.elsevier.com/locate/metabol
Citation
Metabolism, 2014, v. 63 n. 10, p. 1363-1373 How to Cite?
AbstractOBJECTIVE: Adiponectin is known to confer its cardioprotective effects in obesity and type 2 diabetes, mainly by regulating glucose and fatty acid metabolism in cardiomyocytes. Dynamic actin cytoskeleton remodeling is involved in regulation of multiple biological functions, including glucose uptake. Here we investigated in neonatal cardiomyocytes whether adiponectin induced actin cytoskeleton remodeling and if this played a role in adiponectin-stimulated glucose uptake. MATERIALS/METHODS: Primary cardiomyocytes were treated with full-length and globular adiponectin (fAd and gAd, respectively). RESULTS: Both fAd and gAd increased RhoA activity, phosphorylation of the Rho/ROCK signaling target cofilin and actin polymerization to form filamentous actin as determined by rhodamine-phallodin immunofluorescence and quantitative analysis of filamentous to globular actin ratio. Scanning electron microscopy also demonstrated structural remodeling. Adiponectin stimulated glucose uptake, was significantly abrogated in the presence of inhibitors of actin cytoskeleton remodeling (cytochalasin D) and Rho/ROCK signaling (C3 transferase, Y27632). We showed that adiponectin increased colocalization of actin and APPL1 and that actin remodeling, phosphorylation of AMPK, p38MAPK and cofilin, glucose uptake and oxidation were all attenuated after siRNA-mediated knockdown of APPL1. CONCLUSION: We show that adiponectin mediates Rho/ROCK-dependent actin cytoskeleton remodeling to increase glucose uptake and metabolism via APPL1 signaling.
Persistent Identifierhttp://hdl.handle.net/10722/214311
ISSN
2015 Impact Factor: 4.375
2015 SCImago Journal Rankings: 1.978

 

DC FieldValueLanguage
dc.contributor.authorPalanivel, R-
dc.contributor.authorGanguly, R-
dc.contributor.authorTurdi, S-
dc.contributor.authorXu, A-
dc.contributor.authorSweeney, G-
dc.date.accessioned2015-08-21T11:12:09Z-
dc.date.available2015-08-21T11:12:09Z-
dc.date.issued2014-
dc.identifier.citationMetabolism, 2014, v. 63 n. 10, p. 1363-1373-
dc.identifier.issn0026-0495-
dc.identifier.urihttp://hdl.handle.net/10722/214311-
dc.description.abstractOBJECTIVE: Adiponectin is known to confer its cardioprotective effects in obesity and type 2 diabetes, mainly by regulating glucose and fatty acid metabolism in cardiomyocytes. Dynamic actin cytoskeleton remodeling is involved in regulation of multiple biological functions, including glucose uptake. Here we investigated in neonatal cardiomyocytes whether adiponectin induced actin cytoskeleton remodeling and if this played a role in adiponectin-stimulated glucose uptake. MATERIALS/METHODS: Primary cardiomyocytes were treated with full-length and globular adiponectin (fAd and gAd, respectively). RESULTS: Both fAd and gAd increased RhoA activity, phosphorylation of the Rho/ROCK signaling target cofilin and actin polymerization to form filamentous actin as determined by rhodamine-phallodin immunofluorescence and quantitative analysis of filamentous to globular actin ratio. Scanning electron microscopy also demonstrated structural remodeling. Adiponectin stimulated glucose uptake, was significantly abrogated in the presence of inhibitors of actin cytoskeleton remodeling (cytochalasin D) and Rho/ROCK signaling (C3 transferase, Y27632). We showed that adiponectin increased colocalization of actin and APPL1 and that actin remodeling, phosphorylation of AMPK, p38MAPK and cofilin, glucose uptake and oxidation were all attenuated after siRNA-mediated knockdown of APPL1. CONCLUSION: We show that adiponectin mediates Rho/ROCK-dependent actin cytoskeleton remodeling to increase glucose uptake and metabolism via APPL1 signaling.-
dc.languageeng-
dc.publisherWB Saunders Co. The Journal's web site is located at http://www.elsevier.com/locate/metabol-
dc.relation.ispartofMetabolism-
dc.titleAdiponectin stimulates Rho-mediated actin cytoskeleton remodeling and glucose uptake via APPL1 in primary cardiomyocytes-
dc.typeArticle-
dc.identifier.emailXu, A: amxu@hkucc.hku.hk-
dc.identifier.authorityXu, A=rp00485-
dc.identifier.doi10.1016/j.metabol.2014.07.005-
dc.identifier.pmid25108566-
dc.identifier.hkuros246728-
dc.identifier.volume63-
dc.identifier.issue10-
dc.identifier.spage1363-
dc.identifier.epage1373-
dc.publisher.placeUnited States-

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