130447 20240125162930.0 doi 10.1055/s-0028-1128146 sideral 116143 ART-2009-116143 eng Gómez, O. Expression and Regulation of Insulin and the Glucose Transporter GLUT8 in the Testes of Diabetic Rats 2009 Diabetes induces several malfunctions in male germ cells. The aim of this study was to analyze the levels and localization of the glucose transporter GLUT8 and insulin in the testes of rats induced to a diabetic status by a single dose of streptozotocin. One month after inducing diabetes, the GLUT8 immunoreactivity in diabetic rats was mainly located associated to the acrosomic system of spermatids, and at low levels in Leydig cells. Neither the immunohistochemical localization of this transporter nor its levels showed any difference when compared to control rats. Furthermore, it was observed that control rat testes expressed insulin, which was diffusely located in the cytoplasm of both Leydig cells and early elongated spermatids and concentrated in a cytoplasmic compartment in the more mature spermatids. Testicular insulin levels measured by western blot were reduced by more than half in diabetic rats, although the distribution of the hormone was unchanged. These results indicate that i) insulin is produced by testicular cells, ii) insulin is depleted by streptozotocin-induced diabetes, and iii) that insulin depletion and hyperglycemia do not regulate the expression of GLUT8 in testes. These results also suggest that testicular production of insulin could play a role in regulating spermatogenesis and/or glucose metabolism in these organs. info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 2.686 2009 ENDOCRINOLOGY & METABOLISM 51 / 104 = 0.49 2009 Q2 T2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Ballester, B. Romero, A. Arnal, E. Almansa, I. Miranda, M. Mesonero, J. Universidad de Zaragoza (orcid)0000-0003-4758-3998 Terrado, J. 1005 410 Universidad de Zaragoza Dpto. Farmacología y Fisiolog. Área Fisiología 41, 5 (2009), 343-349 Horm. Metab. Res. HORMONE AND METABOLIC RESEARCH 0018-5043 468877 http://zaguan.unizar.es/record/130447/files/texto_completo.pdf Versión publicada 2372676 http://zaguan.unizar.es/record/130447/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:130447 articulos driver 2024-01-25-15:11:19 ARTICLE