Study links low oxytocin levels to symptoms of polycystic ovary syndrome

NewsGuard 100/100 Score

In a recent systematic review published in Current Issues in Molecular Biology, researchers from Portugal examined and discussed the role of oxytocin (OT) in polycystic ovary syndrome (PCOS), its association with PCOS symptoms, and the effect of OT administration.

They found that PCOS is associated with reduced serum OT levels, and alterations in OT levels are linked to fertility issues and body weight, suggesting a potential role of OT dysfunction in the development of PCOS.

Study: The Role of Oxytocin in Polycystic Ovary Syndrome: A Systematic Review. Image Credit: MMD Creative/Shutterstock.comStudy: The Role of Oxytocin in Polycystic Ovary Syndrome: A Systematic Review. Image Credit: MMD Creative/Shutterstock.com

Background

PCOS is a complex and prevalent endocrine disorder in women of reproductive age that affects their quality of life. It is characterized by polycystic ovaries, androgen excess, and ovulatory dysfunction, often leading to infertility and various metabolic, reproductive, and psychological issues.

PCOS is linked to high levels of androgen and abnormal LH/FSH (luteinizing hormone/ follicle-stimulating hormone) ratios, contributing to anovulatory infertility and increased risks during pregnancy.

Biochemically, OT is a nine-amino acid-long peptide involved in cognitive, emotional, and reproductive functions. While it is generated in the hypothalamus and secreted by the posterior pituitary gland, OT receptors (OXTR) are found in various body parts, including the ovaries and prostate gland.

OT is vital for various reproductive and behavioral functions in humans, including pregnancy, parturition, breastfeeding, bonding, prosocial behavior, decision-making, physical activity, and orgasm.

Previous studies suggest that OT levels are lower in women with PCOS, potentially impacting mood and weight. Animal studies indicate OT deficiency can potentially lead to obesity, and OT administration may reduce weight and enhance muscle tone.

Despite these findings, the exact role of OT in PCOS remains unclear. In the present systematic review, researchers aimed to clarify OT's role in PCOS by examining all the relevant animal and human studies.

Specifically, it focused on (i) identifying potential alterations in basal plasma OT levels in PCOS, (ii) understanding how changes in OT levels might relate to PCOS symptoms, and (iii) investigating the effects of OT administration on PCOS.

About the study

Databases, including PubMed, Scopus, and Web of Science, were thoroughly searched to identify relevant studies. The review involved eight studies, including experimental studies, randomized clinical trials, clinical pilot studies, case-control studies, and population genetics studies.

Five of the included studies were conducted on humans (n = 609 women), while three were conducted on animals. It excluded studies on other endocrine diseases, male studies, reviews, and meta-analyses.

Results and discussion

Cohen’s kappa value was found to be 0.742, indicating significant agreement between the two individual reviewers. The human studies primarily explored the relationship between OT administration and fertility.

Two clinical trials found that intranasal OT did not improve fertility in PCOS patients, possibly due to inadequate dosing or administration methods.

These studies did not measure blood or salivary OT levels. One study found lower OT levels in PCOS patients compared to non-PCOS controls and linked these lower levels to hormonal imbalances in the hypothalamic-pituitary–ovarian (HPO) axis.

A case-control study also associated higher OT levels with improved pregnancy rates in PCOS women. One genetic study examined the gene polymorphisms in OXTR in PCOS patients and found five variants linked to PCOS, suggesting a genetic influence on OXTR expression.

The animal studies used rat models to assess the effects of OT on metabolic disorders and uterine function. One study found that OT administration regulated uterine contractions in PCOS rats, while another reported that acute OT administration could reduce body weight and food intake in PCOS rats.

Chronic OT administration was found to decrease food intake and body weight in both PCOS and control rats. Another study found that OT administration reduced body weight, visceral fat, and adipocyte size in a dihydrotestosterone (DHT)-induced rat PCOS model.

Overall, these findings suggest that OT may influence the metabolic and reproductive functions in PCOS, but further research is warranted to understand its therapeutic potential.

Further, the review highlighted gaps in the current research in the field, such as the need for studies assessing the impact of OT on prosocial behavior, couple relationships, and sexual satisfaction in PCOS.

Different dosage regimens and patterns of OT administration were also found to be insufficiently studied, highlighting the need for further research.

Conclusion

In conclusion, the present review comprehensively examined the studies exploring the effect of OT levels or OT administration on PCOS. Most studies emphasized OT's role in fertility issues, with only one study linking higher OT levels to increased pregnancy rates.

Consistently, basal OT levels were found to be reduced in PCOS women, suggesting that low OT, alongside low FSH levels, contributes to anovulation in PCOS.

Additionally, potential molecular mechanisms involving altered OXTRs and genetic variants in PCOS were discussed. These insights are crucial for potentially developing targeted treatments and improving the quality of life for women with PCOS in the future.

Journal reference:
Dr. Sushama R. Chaphalkar

Written by

Dr. Sushama R. Chaphalkar

Dr. Sushama R. Chaphalkar is a senior researcher and academician based in Pune, India. She holds a PhD in Microbiology and comes with vast experience in research and education in Biotechnology. In her illustrious career spanning three decades and a half, she held prominent leadership positions in academia and industry. As the Founder-Director of a renowned Biotechnology institute, she worked extensively on high-end research projects of industrial significance, fostering a stronger bond between industry and academia.  

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Chaphalkar, Sushama R.. (2024, May 31). Study links low oxytocin levels to symptoms of polycystic ovary syndrome. News-Medical. Retrieved on June 12, 2024 from https://www.news-medical.net/news/20240529/Study-links-low-oxytocin-levels-to-symptoms-of-polycystic-ovary-syndrome.aspx.

  • MLA

    Chaphalkar, Sushama R.. "Study links low oxytocin levels to symptoms of polycystic ovary syndrome". News-Medical. 12 June 2024. <https://www.news-medical.net/news/20240529/Study-links-low-oxytocin-levels-to-symptoms-of-polycystic-ovary-syndrome.aspx>.

  • Chicago

    Chaphalkar, Sushama R.. "Study links low oxytocin levels to symptoms of polycystic ovary syndrome". News-Medical. https://www.news-medical.net/news/20240529/Study-links-low-oxytocin-levels-to-symptoms-of-polycystic-ovary-syndrome.aspx. (accessed June 12, 2024).

  • Harvard

    Chaphalkar, Sushama R.. 2024. Study links low oxytocin levels to symptoms of polycystic ovary syndrome. News-Medical, viewed 12 June 2024, https://www.news-medical.net/news/20240529/Study-links-low-oxytocin-levels-to-symptoms-of-polycystic-ovary-syndrome.aspx.

Comments

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment
Post

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

You might also like...
Machine learning model to determine associations between metabolic syndrome and lactation