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Regulation of glucose metabolism by insulin in cardiomyocytesSudar, Emina ...Cardiac function is improved during ischemia by stimulating glucose metabolism and subsequent decreasing of fatty acid (FA) oxidation. The impairment of heart glucose metabolism may contribute to the ... heart dysfunction and cardiomyopathy. Glucose transport is one of the first steps in insulin stimulated glucose uptake. Glucose entry into cells is a process that requires the involvement of a carrier protein in order to facilitate the movement of glucose across the plasma membrane. In cardiomyocytes (CMY), insulin stimulated glucose disposal is mediated via translocation of glucose transporters (GLUTs): GLUT4 and GLUT1. The major mechanism by which insulin regulatesGLUT4translocation and stimulation of glycogen synthesis in CMY is through activation of the protein kinaseB(PKB) via phosphoinositol 3 kinase (PI3-K). In addition, insulin stimulates GLUT4 translocation and increases glucose uptake in CMY PI3-via K independent pathway by Cbl proto-oncoprotein phosphorylation. Combined activity of both pathways is required for GLUT4translocation in CMY. Insulin independent pathways, like AMP-activated protein kinase (AMPK) pathway, also contributes to increased glucose uptake in CMY and PKB, and AMPK activity are inversely correlated during myocardial ischemia, although the influence of insulin on AMPK cardiac signaling would contradict previous observations. It has been reported that via PKB, insulin has an ability to inactivate AMPK. Inhibition of AMPK by insulin may be a contributory mechanism to the observation that cardiac FAoxidation is inhibited by insulin. Understanding how these two kinases interact at the molecular level in response to insulin may provide insights into how insulin is cardioprotective against ischemia.Vir: Acta Facultatis medicae Naissensis = Radovi Medicinskog fakulteta u Nišu. - ISSN 0351-6083 (Vol. 24, br. 1, 2007, Str. 41-44)Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasleLeto - 2007Jezik - angleškiCOBISS.SI-ID - 33911045
Avtor
Sudar, Emina |
Velebit Marković, Jelena |
Gluvić, Zoran |
Lazić, Emilija |
Isenović, Esma R.
Teme
adipociti |
inzulin |
glukoza |
eksocitoza |
elektorfiziologija |
konfokalna mikroskopija
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vir: Acta Facultatis medicae Naissensis = Radovi Medicinskog fakulteta u Nišu. - ISSN 0351-6083 (Vol. 24, br. 1, 2007, Str. 41-44)
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Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Sudar, Emina | ![]() |
Velebit Marković, Jelena | 32525 |
Gluvić, Zoran | ![]() |
Lazić, Emilija | ![]() |
Isenović, Esma R. | ![]() |
Vir: Osebne bibliografije
in: SICRIS
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