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Hyperandrogenism Decreases GRP78 Protein Level and Glucose Uptake in Human Endometrial Stromal Cells

Authordc.contributor.authorRosas Chuñil, Carlos 
Authordc.contributor.authorOróstica, Lorena 
Authordc.contributor.authorPoblete, Cristian 
Authordc.contributor.authorCarvajal Gavilán, Rodrigo 
Authordc.contributor.authorGabler Neale, Fernando 
Authordc.contributor.authorRomero Osses, Carmen 
Authordc.contributor.authorLavandero González, Sergio 
Authordc.contributor.authorVega Blanco, María Margarita 
Admission datedc.date.accessioned2016-11-16T19:26:33Z
Available datedc.date.available2016-11-16T19:26:33Z
Publication datedc.date.issued2016
Cita de ítemdc.identifier.citationReproductive Sciences 2016, Vol. 23(6) 761-770es_ES
Identifierdc.identifier.other10.1177/1933719115618283
Identifierdc.identifier.urihttp://repositorio.uchile.cl/handle/2250/141225
Abstractdc.description.abstractBackground: Women with polycystic ovary syndrome (PCOS) exhibit a low fertility by chronic hyperandrogenemia. Different evidence have shown that androgens could regulate the endoplasmic reticulum (ER) homeostasis and glucose metabolism. However, it is unclear whether androgens can exert these effects on human endometrial stromal cells. Our goal was to study the protein content of GRP78 (an ER homeostasis marker) in endometria from women with PCOS and healthy women and to assess the GRP78 protein levels and its relationship with glucose uptake on a human endometrial stromal cell line stimulated with testosterone. Methods: Immunohistochemistry assays for GRP78 were performed on endometrial samples obtained from women with PCOS (n = 8) and control women subjected to hysterectomy (n = 8). Western blot analysis for GRP78 and glucose uptake was assessed in a telomerase-immortalized human endometrial stromal cell line (T-HESC) exposed to testosterone for 24 or 48 hours and challenged to an insulin short-term stimulation. Tukey test was performed for human samples comparison. Student t test or ANOVA-Bonferroni test was carried out according to the in vitro experiment. P < .05 was considered as significant. Results: GRP78 stromal immunostaining was reduced in PCOS endometria compared to controls (P < .05). The T-HESC shows a testosterone-dependent downregulation of GRP78 protein content (P < .05), concomitant with half-reduction in glucose uptake compared to controls (P < .05). Moreover, enhanced small interfering RNA against GRP78 messenger RNA leads to a decrease in glucose uptake (P < .05). Such effects were reverted by hydroxyflutamide, an inhibitor of androgen receptor. Conclusion: These results suggest that hyperandrogenemic PCOS environment could compromise the endometrial homeostasis confirmed by the decrease in glucose uptake induced by testosterone and exhibited by stromal cells.es_ES
Lenguagedc.language.isoenes_ES
Publisherdc.publisherSAGEes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
Sourcedc.sourceReproductive Scienceses_ES
Keywordsdc.subjectTestosteronees_ES
Keywordsdc.subjectEndometriumes_ES
Keywordsdc.subjectGRP78es_ES
Keywordsdc.subjectER stresses_ES
Keywordsdc.subjectGlucosees_ES
Títulodc.titleHyperandrogenism Decreases GRP78 Protein Level and Glucose Uptake in Human Endometrial Stromal Cellses_ES
Document typedc.typeArtículo de revistaes_ES
Catalogueruchile.catalogadorlajes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES


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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile