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Archives of Gynecology and Obstetrics

, Volume 300, Issue 5, pp 1423–1434 | Cite as

The role of Kisspeptin levels in polycystic ovary syndrome: a systematic review and meta-analysis

  • Nicole Paloma de Assis Rodrigues
  • Antonio Simone Laganà
  • Victor Zaia
  • Amerigo Vitagliano
  • Caio Parente Barbosa
  • Renato de Oliveira
  • Camila Martins Trevisan
  • Erik MontagnaEmail author
Gynecologic Endocrinology and Reproductive Medicine

Abstract

Purpose

Polycystic ovarian syndrome (PCOS) is a complex and not fully elucidated pathology. This prevalent endocrinopathy affects patients in reproductive age, impacts on estrogen-dependent diseases, as well as in infertility. In this context, Kisspeptin (KP) may be considered a potential biomarker for PCOS diagnosis and follow-up. Here, we aimed to verify the levels of KP in obese and non-obese patients with PCOS, their relationship with other hormones, in comparison to healthy controls.

Methods

A systematic review and meta-analysis were performed according to the PRISMA guidelines. We searched MEDLINE, EMBASE, PsycINFO, Global Health, The Cochrane Library, Health Technology Assessment Database, and Web of Science for eligible studies. A random effects model meta-analysis of standardized mean difference (SMD) was conducted and the I2 was used to assess heterogeneity. Meta-regression was conducted through mixed-effects model.

Results

A total of 12 studies were included, comprising 660 PCOS patients and 600 controls. The KP levels were lower in the control group (0.76: 0.17–1.35; 95% CI). In the subgroup analyses, patients were divided in non-overweight/obese (BMI < 25) and overweight/obese (BMI ≥ 25) groups. The meta-regression revealed a difference between the obese and non-obese groups (z = 2.81; p = 0.0050).

Conclusions

PCOS patients showed higher KP levels than control, and obese non-PCOS patients also showed altered KP levels. All studies had poor descriptions of sample collection, pre-analytical and analytical procedures, which is critical considering structural characteristics of the KP molecule.

Keywords

Polycystic ovary syndrome Kisspeptins Human fertility Meta-analysis Obesity 

Notes

Acknowledgements

Dr. Bianca Bianco for the support in the manuscript preparation.

Authors’ contribution

NP Assis Rodrigues: design of the study, literature review, data collection, data analysis and manuscript writing; AS Laganà: data analysis, manuscript writing and editing; V Zaia: data collection, data analysis and review of the manuscript; A Vitagliano: data analysis and review of the manuscript; CP Barbosa: review of the manuscript; R Oliveira: data analysis, review and manuscript writing; CM Trevisan: data collection, data analysis and review of the manuscript; E Montagna: design of the study, literature review, data analysis and manuscript writing/review. All authors read and approved the final version of the manuscript.

Funding

None.

Compliance with ethical standards

Conflict of interest

The authors have no conflicts of interest to disclose.

Informed consent

Not applicable.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Nicole Paloma de Assis Rodrigues
    • 1
  • Antonio Simone Laganà
    • 2
  • Victor Zaia
    • 1
  • Amerigo Vitagliano
    • 3
  • Caio Parente Barbosa
    • 1
    • 4
  • Renato de Oliveira
    • 1
    • 4
  • Camila Martins Trevisan
    • 1
  • Erik Montagna
    • 1
    Email author
  1. 1.Postgraduate Program in Health SciencesFaculdade de Medicina do ABCSanto AndréBrazil
  2. 2.Department of Obstetrics and Gynecology“Filippo Del Ponte” Hospital, University of InsubriaVareseItaly
  3. 3.Department of Women and Children’s Health, Unit of Gynecology and ObstetricsUniversity of PaduaPaduaItaly
  4. 4.Discipline of Sexual and Reproductive Health and Populational Genetics, Department of Collective HealthFaculdade de Medicina do ABCSanto AndréBrazil

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