{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T06:10:47Z","timestamp":1790748647452,"version":"4.1.0"},"reference-count":47,"publisher":"American Diabetes Association","issue":"10","license":[{"start":{"date-parts":[[2021,8,27]],"date-time":"2021-08-27T00:00:00Z","timestamp":1630022400000},"content-version":"vor","delay-in-days":4063,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/"}],"content-domain":{"domain":["diabetesjournals.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2010,10,1]]},"abstract":"<jats:sec>\n                  <jats:title>OBJECTIVE<\/jats:title>\n                  <jats:p>Insulin resistance is associated with the pathogenesis of metabolic disorders as type 2 diabetes and obesity. Given the emerging role of signal transduction in these syndromes, we set out to explore the possible role that G protein\u2013coupled receptor kinase 2 (GRK2), first identified as a G protein\u2013coupled receptor regulator, could have as a modulator of insulin responses.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>RESEARCH DESIGN AND METHODS<\/jats:title>\n                  <jats:p>We analyzed the influence of GRK2 levels in insulin signaling in myoblasts and adipocytes with experimentally increased or silenced levels of GRK2, as well as in GRK2 hemizygous animals expressing 50% lower levels of this kinase in three different models of insulin resistance: tumor necrosis factor-\u03b1 (TNF-\u03b1) infusion, aging, and high-fat diet (HFD). Glucose transport, whole-body glucose and insulin tolerance, the activation status of insulin pathway components, and the circulating levels of important mediators were measured. The development of obesity and adipocyte size with age and HFD was analyzed.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>RESULTS<\/jats:title>\n                  <jats:p>Altering GRK2 levels markedly modifies insulin-mediated signaling in cultured adipocytes and myocytes. GRK2 levels are increased by \u223c2-fold in muscle and adipose tissue in the animal models tested, as well as in lymphocytes from metabolic syndrome patients. In contrast, hemizygous GRK2 mice show enhanced insulin sensitivity and do not develop insulin resistance by TNF-\u03b1, aging, or HFD. Furthermore, reduced GRK2 levels induce a lean phenotype and decrease age-related adiposity.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>CONCLUSIONS<\/jats:title>\n                  <jats:p>Overall, our data identify GRK2 as an important negative regulator of insulin effects, key to the etiopathogenesis of insulin resistance and obesity, which uncovers this protein as a potential therapeutic target in the treatment of these disorders.<\/jats:p>\n               <\/jats:sec>","DOI":"10.2337\/db10-0771","type":"journal-article","created":{"date-parts":[[2010,7,14]],"date-time":"2010-07-14T02:25:17Z","timestamp":1279074317000},"page":"2407-2417","update-policy":"https:\/\/doi.org\/10.2337\/ada-journal-policies","source":"Crossref","is-referenced-by-count":80,"title":["G Protein\u2013Coupled Receptor Kinase 2 Plays a Relevant Role in Insulin Resistance and Obesity"],"prefix":"10.2337","volume":"59","author":[{"given":"Lucia","family":"Garcia-Guerra","sequence":"first","affiliation":[{"name":"1Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University, Madrid, Spain;"},{"name":"2CIBER de Diabetes y Enfermedades Metab\u00f3licas (CIBERDEM), Madrid, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Iria","family":"Nieto-Vazquez","sequence":"additional","affiliation":[{"name":"1Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University, Madrid, Spain;"},{"name":"2CIBER de Diabetes y Enfermedades Metab\u00f3licas (CIBERDEM), Madrid, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rocio","family":"Vila-Bedmar","sequence":"additional","affiliation":[{"name":"1Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University, Madrid, Spain;"},{"name":"2CIBER de Diabetes y Enfermedades Metab\u00f3licas (CIBERDEM), Madrid, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mar\u00eda","family":"Jurado-Pueyo","sequence":"additional","affiliation":[{"name":"3Departamento de Biolog\u00eda Molecular and Centro de Biolog\u00eda Molecular Severo Ochoa (CSIC-UAM) and Instituto de Investigaci\u00f3n Sanitaria Princesa, Madrid, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guillermo","family":"Zalba","sequence":"additional","affiliation":[{"name":"4Division of Cardiovascular Sciences, Center for Applied Medical Research, University of Navarra, Pamplona, Spain."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Javier","family":"D\u00edez","sequence":"additional","affiliation":[{"name":"4Division of Cardiovascular Sciences, Center for Applied Medical Research, University of Navarra, Pamplona, Spain."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cristina","family":"Murga","sequence":"additional","affiliation":[{"name":"3Departamento de Biolog\u00eda Molecular and Centro de Biolog\u00eda Molecular Severo Ochoa (CSIC-UAM) and Instituto de Investigaci\u00f3n Sanitaria Princesa, Madrid, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sonia","family":"Fern\u00e1ndez-Veledo","sequence":"additional","affiliation":[{"name":"1Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University, Madrid, Spain;"},{"name":"2CIBER de Diabetes y Enfermedades Metab\u00f3licas (CIBERDEM), Madrid, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"Jr.","given":"Federico","family":"Mayor","sequence":"additional","affiliation":[{"name":"3Departamento de Biolog\u00eda Molecular and Centro de Biolog\u00eda Molecular Severo Ochoa (CSIC-UAM) and Instituto de Investigaci\u00f3n Sanitaria Princesa, Madrid, 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