TY - JOUR
T1 - Regulation of adiponectin secretion by adipocytes in the polycystic ovary syndrome
T2 - Role of tumor necrosis factor-α
AU - Chazenbalk, Gregorio
AU - Trivax, Bradley S.
AU - Yildiz, Bulent O.
AU - Bertolotto, Cristina
AU - Mathur, Ruchi
AU - Heneidi, Saleh
AU - Azziz, Ricardo
N1 - Funding Information:
This work was supported in part by the Helping Hand of Los Angeles and Grants RO1-DK073632 (to R.A.) and M01-RR00425 (to the Cedars-Sinai Medical Center General Clinical Research Center) from the National Institutes of Health .
PY - 2010/2
Y1 - 2010/2
N2 - Context: Adipose tissue dysfunction associated with low-grade chronic inflammation and dysregulation of adipokine secretion might significantly contribute to the pathogenesis of polycystic ovary syndrome (PCOS). Objective: The objective of the study was to determine whether the effect of TNF-α, IL-6, monocyte chemoattractant protein-1, or coculture of adipocytes and adipose tissue macrophages (ATMs), on the secretion of adiponectin by adipocytes, differs in PCOS compared with controls. Design and Participants: Primary cultures of sc adipocytes and coculture of adipocytes and ATMs from overweight and obese patients with PCOS and healthy control women were used. Main Outcome Measures: Adiponectin secretion by adipocytes was measured. Results: The baseline secretion of adiponectin by isolated adipocytes did not differ between PCOS and control samples. The net change in adiponectin secretion in response to IL-6, monocyte chemoattractant protein-1, and TNF-α differed between PCOS (decreasing) and control (increasing) adipocytes, although the difference reached significance only for TNF-α (P < 0.04). Coculture of isolated adipocytes and ATMs resulted in a decrease in adiponectin secretion by PCOS (P < 0.05) but not control adipocytes, and the difference between the net change in adiponectin secretion in PCOS vs. control samples was significant (P < 0.03). Conclusions: Our results suggest that adiponectin secretion by adipocytes in response to cytokines/ chemokines and most notably in response to coculturing with ATMs differs between PCOS and control women, favoring greater suppression of adiponectin in PCOS. The mechanisms underlying these defects and the role of concurrent obesity remain to be determined.
AB - Context: Adipose tissue dysfunction associated with low-grade chronic inflammation and dysregulation of adipokine secretion might significantly contribute to the pathogenesis of polycystic ovary syndrome (PCOS). Objective: The objective of the study was to determine whether the effect of TNF-α, IL-6, monocyte chemoattractant protein-1, or coculture of adipocytes and adipose tissue macrophages (ATMs), on the secretion of adiponectin by adipocytes, differs in PCOS compared with controls. Design and Participants: Primary cultures of sc adipocytes and coculture of adipocytes and ATMs from overweight and obese patients with PCOS and healthy control women were used. Main Outcome Measures: Adiponectin secretion by adipocytes was measured. Results: The baseline secretion of adiponectin by isolated adipocytes did not differ between PCOS and control samples. The net change in adiponectin secretion in response to IL-6, monocyte chemoattractant protein-1, and TNF-α differed between PCOS (decreasing) and control (increasing) adipocytes, although the difference reached significance only for TNF-α (P < 0.04). Coculture of isolated adipocytes and ATMs resulted in a decrease in adiponectin secretion by PCOS (P < 0.05) but not control adipocytes, and the difference between the net change in adiponectin secretion in PCOS vs. control samples was significant (P < 0.03). Conclusions: Our results suggest that adiponectin secretion by adipocytes in response to cytokines/ chemokines and most notably in response to coculturing with ATMs differs between PCOS and control women, favoring greater suppression of adiponectin in PCOS. The mechanisms underlying these defects and the role of concurrent obesity remain to be determined.
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U2 - 10.1210/jc.2009-1158
DO - 10.1210/jc.2009-1158
M3 - Article
C2 - 20089616
AN - SCOPUS:76149112554
SN - 0021-972X
VL - 95
SP - 935
EP - 942
JO - Journal of Clinical Endocrinology and Metabolism
JF - Journal of Clinical Endocrinology and Metabolism
IS - 2
ER -