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However, neither the combinatorial interaction between these two PCOS-related etiological factors nor the mechanisms of their actions in the uterus during pregnancy are well understood. We hypothesized that hyperandrogensim and insulin resistance exert a causative role in miscarriage by inducing defects in uterine function that are accompanied by mitochondrial-mediated oxidative stress, inflammation, and perturbed gene expression. Here, we tested this hypothesis by studying the metabolic, endocrine, and uterine abnormalities in pregnant rats after exposure to daily injection of 5\u03b1-dihydrotestosterone (DHT; 1.66 mg\u00b7kg body wt<jats:sup>\u22121<\/jats:sup>\u00b7day<jats:sup>\u22121<\/jats:sup>) and\/or insulin (6.0 IU\/day) from gestational day 7.5 to 13.5. We showed that whereas DHT-exposed and insulin-exposed pregnant rats presented impaired insulin sensitivity, DHT + insulin-exposed pregnant rats exhibited hyperandrogenism and peripheral insulin resistance, which mirrors pregnant PCOS patients. Compared with controls, hyperandrogenism and insulin resistance in the dam were associated with alterations in uterine morphology and aberrant expression of genes responsible for decidualization ( Prl8a2, Fxyd2, and Mt1g), placentation ( Fcgr3 and Tpbpa), angiogenesis ( Flt1, Angpt1, Angpt2, Ho1, Ccl2, Ccl5, Cxcl9, and Cxcl10) and insulin signaling (Akt, Gsk3, and Gluts). Moreover, we observed changes in uterine mitochondrial function and homeostasis (i.e., mitochondrial DNA copy number and the expression of genes responsible for mitochondrial fusion, fission, biogenesis, and mitophagy) and suppression of both oxidative and antioxidative defenses (i.e., reactive oxygen species, Nrf2 signaling, and interactive networks of antioxidative stress responses) in response to the hyperandrogenism and insulin resistance. These findings demonstrate that hyperandrogenism and insulin resistance induce mitochondria-mediated damage and a resulting imbalance between oxidative and antioxidative stress responses in the gravid uterus. <\/jats:p>","DOI":"10.1152\/ajpendo.00359.2018","type":"journal-article","created":{"date-parts":[[2019,3,12]],"date-time":"2019-03-12T14:25:38Z","timestamp":1552400738000},"page":"E794-E809","source":"Crossref","is-referenced-by-count":76,"title":["Hyperandrogenism and insulin resistance induce gravid uterine defects in association with mitochondrial dysfunction and aberrant reactive oxygen species production"],"prefix":"10.1152","volume":"316","author":[{"given":"Min","family":"Hu","sequence":"first","affiliation":[{"name":"Department of Traditional Chinese Medicine, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China"},{"name":"Department of Physiology\/Endocrinology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of 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