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J Endocrinol Invest. 2016 Jul;39(7):747-54. doi: 10.1007/s40618-016-0453-5. Epub 2016 Mar 11.

A possible connection between tumor necrosis factor alpha and adropin levels in polycystic ovary syndrome.

Author information

1
Department of Biochemistry and Clinical Biochemistry, Dokuz Eylul University Faculty of Medicine, 35340, Inciralti, Izmir, Turkey.
2
Division of Endocrinology and Metabolism (PCOS Research Group), Department of Internal Medicine, Dokuz Eylul University Faculty of Medicine, 35340, Inciralti, Izmir, Turkey. drmehmetcalan@gmail.com.
3
Department of Obstetrics and Gynecology, Manisa Merkezefendi State Hospital, 45020, Merkezefendi, Manisa, Turkey.
4
Division of Endocrinology and Metabolism, Department of Internal Medicine (PCOS Research Group), Izmir Bozyaka Training and Research Hospital, 35170, Bozyaka, Izmir, Turkey.
5
Department of Bioengineering, Ege University, 35100, Bornova, Izmir, Turkey.
6
Department of Obstetrics and Gynecology, Medical Park Hospital, Izmir University Faculty of Medicine, 35575, Izmir, Turkey.

Abstract

CONTEXT:

Adropin is a peptide hormone implicated in the regulation of insulin sensitivity and energy homeostasis. Polycystic ovary syndrome (PCOS) is a metabolic and reproductive disease associated with insulin resistance. It has been demonstrated that various inflammatory markers increased in PCOS including TNF-α. TNF-α regulates the secretion of certain peptides which play a crucial role in glucose and lipid homeostasis. There is also some evidence of a link between TNF-α and adropin.

OBJECTIVE:

To ascertain whether there is an association between circulating adropin levels and TNF-α in PCOS.

PATIENTS AND DESIGN:

152 women with PCOS and 152 age- and body mass index-matched controls without PCOS were recruited for this cross-sectional study.

MAIN OUTCOME MEASURES:

Adropin and TNF-α levels were measured using ELISA.

RESULTS:

Adropin levels were lower in the PCOS group compared with the control group (7.43 ± 0.79 vs. 9.42 ± 0.76 ng/ml, P < 0.001), whereas TNF-α levels were higher (49.93 ± 3.39 vs. 35.83 ± 2.47 pg/ml, P < 0.001). A strongly negative correlation was found between circulating adropin levels and TNF-α levels in women with PCOS (r = -0.407, P < 0.001). Binary logistic regression analysis revealed that decreased adropin levels were significantly associated with high odds of having PCOS, although, after adjustment for TNF-α, this link vanished. Additionally, multiple linear regression analysis showed that HOMA-IR and TFN-α independently predicted adropin levels.

CONCLUSIONS:

Serum adropin levels are significantly decreased in PCOS and are inversely associated with TNF-α. Further dissection of the nature of this association can open new therapeutic options for metabolic diseases.

KEYWORDS:

Adropin; Cytokine; Insulin resistance; Polycystic ovary syndrome; Tumor necrosis factor-α

PMID:
26969461
DOI:
10.1007/s40618-016-0453-5
[Indexed for MEDLINE]

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