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Open Access 01-12-2018 | Research article

Preliminary study showing no association between G238A (rs361525) tumor necrosis factor-α (TNF-α) gene polymorphism and its serum level, hormonal and biochemical aspects of polycystic ovary syndrome

Authors: Fahimeh Kordestani, Sahar Mazloomi, Yousef Mortazavi, Saeideh Mazloomzadeh, Mojtaba Fathi, Haleh Rahmanpour, Abolfazl Nazarian

Published in: BMC Medical Genetics | Issue 1/2018

Abstract

Background

Polycystic ovary syndrome (PCOS) is the main cause of female infertility. Interactions among genetic, biochemical, and immunological factors can affect the pathogenesis of PCOS. As a proinflammatory cytokine, tumor necrosis factor-α (TNF-α) plays an important role in this regard. The present study aimed to evaluate the association of the rs361525 gene single-nucleotide polymorphism (SNP) and TNF-α serum levels with the hormonal and biochemical characteristics of PCOS in Iranian individuals.

Methods

The SNP rs361525 in the TNF-α gene was analyzed by polymerase chain reaction–restriction fragment length polymorphism (PCR-RFLP) in a total of 111 PCOS patients and 105 healthy females. Serum levels of TNF-α, lipid and hormone profiles, and biochemical factors were measured using enzyme-linked immunosorbent assay (ELISA) and calorimetric methods, as appropriate.

Results

The TNF-α serum level was higher in women with PCOS compared with the control group (p < 0.0001), and it was significantly correlated with the homeostasis model assessment (HOMA) factor (r = 0.138, p < 0.05). No significant differences were found in the genotype and allelic frequencies between the two groups (p > 0.05). Higher levels and significant differences were found for the HOMA factor, luteinizing hormone/follicle-stimulating hormone (LH/FSH), testosterone, and body mass index (BMI) in the PCOS group compared with the control group (p < 0.0001). High LH/FSH ratios (odds ratio [OR] = 1.98, 95% confidence interval [CI] = 1.20–3.28, p < 0.01), and high HOMA factor (OR = 5.04, 95% CI = 2.82–9.01, p < 0.001) were significantly associated with an increased risk of PCOS.

Conclusions

Despite the lack of significant difference between rs361525 polymorphism of the TNF-α gene and PCOS, the serum level of TNF-α was increased in PCOS patients and positively correlated with the HOMA factor. Elevation of the LH/FSH ratio and HOMA for insulin resistance (HOMA-IR) increased the risk of PCOS. Therefore, TNF-α could indirectly contribute to PCOS progression.

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Title: Preliminary study showing no association between G238A (rs361525) tumor necrosis factor-α (TNF-α) gene polymorphism and its serum level, hormonal and biochemical aspects of polycystic ovary syndrome
Authors: Fahimeh Kordestani
Sahar Mazloomi
Yousef Mortazavi
Saeideh Mazloomzadeh
Mojtaba Fathi
Haleh Rahmanpour
Abolfazl Nazarian
Publication date: 01-12-2018
Publisher: BioMed Central
Published in: BMC Medical Genetics / Issue 1/2018
Electronic ISSN: 1471-2350
DOI: https://doi.org/10.1186/s12881-018-0662-1

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Preliminary study showing no association between G238A (rs361525) tumor necrosis factor-α (TNF-α) gene polymorphism and its serum level, hormonal and biochemical aspects of polycystic ovary syndrome

Abstract

Background

Methods

Results

Conclusions

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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