Higher PDCD4 expression is associated with obesity, insulin resistance, lipid metabolism disorders, and granulosa cell apoptosis in polycystic ovary syndrome

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Presentation transcript:

Higher PDCD4 expression is associated with obesity, insulin resistance, lipid metabolism disorders, and granulosa cell apoptosis in polycystic ovary syndrome Lingling Ding, M.D., Ph.D., Fei Gao, M.D., Ph.D., Meng Zhang, M.D., Ph.D., Wenjiang Yan, M.D., Ph.D., Rong Tang, M.D., Ph.D., Cheng Zhang, M.D., Ph.D., Zi-Jiang Chen, M.D., Ph.D. Fertility and Sterility Volume 105, Issue 5, Pages 1330-1337.e3 (May 2016) DOI: 10.1016/j.fertnstert.2016.01.020 Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

Figure 1 PDCD4 expression in peripheral blood mononuclear cells (PBMCs) of controls and women with PCOS detected by quantitative real-time polymerase chain reaction (qRT-PCR). (A) Expression levels of PDCD4 mRNA in 77 PCOS patients and 67 healthy women detected by qRT-PCR. Data were normalized to β-actin. (B) Normalized PDCD4 mRNA levels in different obese and lean subgroups. The difference was statistically significant (*P<.05, **P<.01). (C) Relationship between PDCD4 expression and obesity in PCOS patients. PDCD4 expression had a strong positive correlation with body mass index (r = 0.52, P<.0001). Fertility and Sterility 2016 105, 1330-1337.e3DOI: (10.1016/j.fertnstert.2016.01.020) Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

Figure 2 Association between PDCD4 expression and insulin resistance, β-cell function, and lipid metabolic parameters in women with PCOS. In PCOS patients, PDCD4 expression positively correlated with (A) insulin 0, (B) insulin 120, (C) glucose 120, (D) HOMA-IR, and (E) HOMA-β (r = 0.34, 0.31, 0.29, 0.36, and 0.25, respectively; P<.01 or .05). Also in PCOS patients, PDCD4 expression (F) positively correlated with triglycerides (r = 0.39; P<.001) and (G) negatively correlated with HDL (r = −0.41; P<.001). Normalized PDCD4 mRNA levels of obese women with PCOS and insulin resistance were analyzed after metformin, 500 mg twice daily for 2 or 3 months. The difference was statistically significant (*P<.05). (H) Contrast of PDCD4 expression in a total 11 cases after metformin treatment. Fertility and Sterility 2016 105, 1330-1337.e3DOI: (10.1016/j.fertnstert.2016.01.020) Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

Supplemental Figure 1 Apoptosis detection of granulosa cells in PCOS women by flow cytometry analysis. (A) Apoptosis rate of annexin V (+) and propidium iodide (+) in one of the PCOS cases (29.5%) was higher when compared with healthy controls (15.2%). (B) The percentage of apoptotic granulosa cells in the PCOS group was statistically significantly higher than that of healthy controls (*P<.05). Fertility and Sterility 2016 105, 1330-1337.e3DOI: (10.1016/j.fertnstert.2016.01.020) Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions

Supplemental Figure 2 Analysis of apoptosis suppression of granulosa cells (GCs) in women with PCOS by PDCD4 small-interfering RNA (siRNA). (A) Apoptosis rate of annexin V (+) and propidium iodide (+) in one of the PCOS cases (40.2%) (siC) was decreased (29.9%) by knock down of PDCD4 expression using specific siRNA (siP). The percentage of apoptotic GCs in five PCOS cases was statistically significantly decreased after transfection for 24 hours by PDCD4 siRNA (*P<.05). (B) Apoptosis detection of GCs from PCOS patients after siRNA action for 24 hours was analyzed by TUNEL staining (laser confocal imaging, magnification ×20). (C) Bax and Bcl-2 expression was detected by Western blot analysis. Fertility and Sterility 2016 105, 1330-1337.e3DOI: (10.1016/j.fertnstert.2016.01.020) Copyright © 2016 American Society for Reproductive Medicine Terms and Conditions