Pancreatic β-cell dysfunction in polycystic ovary syndrome: role of hyperglycemia-induced nuclear factor-κB activation and systemic inflammation

dc.contributor.authorMalin, Steven K.
dc.contributor.authorKirwan, John P.
dc.contributor.authorSia, Chang Ling
dc.contributor.authorGonzalez, Frank
dc.contributor.departmentDepartment of Obstetrics and Gynecology, IU School of Medicineen_US
dc.date.accessioned2017-07-13T19:23:36Z
dc.date.available2017-07-13T19:23:36Z
dc.date.issued2015-05
dc.description.abstractIn polycystic ovary syndrome (PCOS), oxidative stress is implicated in the development of β-cell dysfunction. However, the role of mononuclear cell (MNC)-derived inflammation in this process is unclear. We determined the relationship between β-cell function and MNC-derived nuclear factor-κB (NF-κB) activation and tumor necrosis factor-α (TNF-α) secretion in response to a 2-h 75-g oral glucose tolerance test (OGTT) in normoglycemic women with PCOS (15 lean, 15 obese) and controls (16 lean, 14 obese). First- and second-phase β-cell function was calculated as glucose-stimulated insulin secretion (insulin/glucose area under the curve for 0-30 and 60-120 min, respectively) × insulin sensitivity (Matsuda Index derived from the OGTT). Glucose-stimulated NF-κB activation and TNF-α secretion from MNC, and fasting plasma thiobarbituric acid-reactive substances (TBARS) and high-sensitivity C-reactive protein (hs-CRP) were also assessed. In obese women with PCOS, first- and second-phase β-cell function was lower compared with lean and obese controls. Compared with lean controls, women with PCOS had greater change from baseline in NF-κB activation and TNF-α secretion, and higher plasma TBARS. β-Cell function was inversely related to NF-κB activation (1st and 2nd) and TNF-α secretion (1st), and plasma TBARS and hs-CRP (1st and 2nd). First- and second-phase β-cell function also remained independently linked to NF-κB activation after adjustment for body fat percentage and TBARS. In conclusion, β-cell dysfunction in PCOS is linked to hyperglycemia-induced NF-κB activation from MNC and systemic inflammation. These data suggest that in PCOS, inflammation may play a role in impairing insulin secretion before the development of overt hyperglycemia.en_US
dc.identifier.citationMalin, S. K., Kirwan, J. P., Sia, C. L., & González, F. (2015). Pancreatic β-cell dysfunction in polycystic ovary syndrome: role of hyperglycemia-induced nuclear factor-κB activation and systemic inflammation. American Journal of Physiology - Endocrinology and Metabolism, 308(9), E770–E777. http://doi.org/10.1152/ajpendo.00510.2014en_US
dc.identifier.urihttps://hdl.handle.net/1805/13453
dc.language.isoen_USen_US
dc.publisherAmerican Physiological Societyen_US
dc.relation.isversionof10.1152/ajpendo.00510.2014en_US
dc.relation.journalAmerican Journal of Physiology - Endocrinology and Metabolismen_US
dc.rightsPublisher Policyen_US
dc.sourcePMCen_US
dc.subjectInsulin secretionen_US
dc.subjectGlucose intoleranceen_US
dc.subjectAndrogensen_US
dc.subjectInsulin resistanceen_US
dc.subjectMononuclear cellsen_US
dc.subjectObesityen_US
dc.subjectInsulin sensitivityen_US
dc.titlePancreatic β-cell dysfunction in polycystic ovary syndrome: role of hyperglycemia-induced nuclear factor-κB activation and systemic inflammationen_US
dc.typeArticleen_US
ul.alternative.fulltexthttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4420895/en_US
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