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Circulating markers of oxidative stress and polycystic ovary syndrome (PCOS): a systematic review and meta-analysis.

Abstract

BACKGROUND

Oxidative stress might be associated with polycystic ovary syndrome (PCOS), but relatively small studies published to date do not permit reaching a definitive conclusion. We aimed at conducting a systematic review and meta-analysis of studies evaluating circulating markers of oxidative stress in patients with PCOS.

METHODS

We conducted a systematic review of studies reporting circulating markers of oxidative stress in women with PCOS and controls published up to June 2012, using Entrez PubMed and EMBASE online facilities. Meta-analysis calculated standardized mean differences (SMDs) and 95% confidence intervals (95CI).

RESULTS

From 1633 potential studies identified electronically, 68 studies, including 4933 PCOS patients and 3671 controls, were selected. For each of nine circulating markers of oxidative stress, an individual meta-analysis was conducted. Compared with control women, patients with PCOS presented higher circulating concentrations of homocysteine (23% increase, SMD 0.6, 95CI, 0.4-0.8), malondialdehyde (47% increase, SMD 1.9, 95CI 1.2-2.6) and asymmetric dimethylarginine (36% increase, SMD 1.1, 95CI 0.6-1.6), and increased superoxide dismutase activity (34% increase, SMD 1.0, 95CI 0.5-1.4) and decreased glutathione levels (50% decrease, SMD -3.7, 95CI -6.2 to -1.2) and paraoxonase-1 activity (32% decrease, SMD -0.9, 95CI -1.3 to -0.4). Similar results were found when restricting the analyses to studies in which patients and controls were matched for age and body mass index.

CONCLUSIONS

Circulating markers of oxidative stress are abnormal in women with PCOS independent of weight excess. This finding suggests that oxidative stress may participate in the pathophysiology of this common disorder.

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    Authors+Show Affiliations

    Murri M
    ,

    Diabetes, Obesity and Human Reproduction Research Group, Hospital Universitario Ramón y Cajal, Madrid, Spain. moramurri@gmail.com

    Luque-Ramírez M
    ,
    Insenser M
    ,
    Ojeda-Ojeda M
    ,
    Escobar-Morreale HF

    Source

    MeSH

    Aryldialkylphosphatase
    Biomarkers
    Body Mass Index
    Female
    Humans
    Malondialdehyde
    Oxidative Stress
    Polycystic Ovary Syndrome

    Pub Type(s)

    Journal Article
    Meta-Analysis
    Research Support, Non-U.S. Gov't
    Review
    Systematic Review

    Language

    eng

    PubMed ID

    23303572

    Citation

    Murri, Mora, et al. "Circulating Markers of Oxidative Stress and Polycystic Ovary Syndrome (PCOS): a Systematic Review and Meta-analysis." Human Reproduction Update, vol. 19, no. 3, 2013, pp. 268-88.
    Murri M, Luque-Ramírez M, Insenser M, et al. Circulating markers of oxidative stress and polycystic ovary syndrome (PCOS): a systematic review and meta-analysis. Hum Reprod Update. 2013;19(3):268-88.
    Murri, M., Luque-Ramírez, M., Insenser, M., Ojeda-Ojeda, M., & Escobar-Morreale, H. F. (2013). Circulating markers of oxidative stress and polycystic ovary syndrome (PCOS): a systematic review and meta-analysis. Human Reproduction Update, 19(3), pp. 268-88. doi:10.1093/humupd/dms059.
    Murri M, et al. Circulating Markers of Oxidative Stress and Polycystic Ovary Syndrome (PCOS): a Systematic Review and Meta-analysis. Hum Reprod Update. 2013;19(3):268-88. PubMed PMID: 23303572.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Circulating markers of oxidative stress and polycystic ovary syndrome (PCOS): a systematic review and meta-analysis. AU - Murri,Mora, AU - Luque-Ramírez,Manuel, AU - Insenser,María, AU - Ojeda-Ojeda,Miriam, AU - Escobar-Morreale,Hector F, Y1 - 2013/01/09/ PY - 2013/1/11/entrez PY - 2013/1/11/pubmed PY - 2013/9/26/medline SP - 268 EP - 88 JF - Human reproduction update JO - Hum. Reprod. Update VL - 19 IS - 3 N2 - BACKGROUND Oxidative stress might be associated with polycystic ovary syndrome (PCOS), but relatively small studies published to date do not permit reaching a definitive conclusion. We aimed at conducting a systematic review and meta-analysis of studies evaluating circulating markers of oxidative stress in patients with PCOS. METHODS We conducted a systematic review of studies reporting circulating markers of oxidative stress in women with PCOS and controls published up to June 2012, using Entrez PubMed and EMBASE online facilities. Meta-analysis calculated standardized mean differences (SMDs) and 95% confidence intervals (95CI). RESULTS From 1633 potential studies identified electronically, 68 studies, including 4933 PCOS patients and 3671 controls, were selected. For each of nine circulating markers of oxidative stress, an individual meta-analysis was conducted. Compared with control women, patients with PCOS presented higher circulating concentrations of homocysteine (23% increase, SMD 0.6, 95CI, 0.4-0.8), malondialdehyde (47% increase, SMD 1.9, 95CI 1.2-2.6) and asymmetric dimethylarginine (36% increase, SMD 1.1, 95CI 0.6-1.6), and increased superoxide dismutase activity (34% increase, SMD 1.0, 95CI 0.5-1.4) and decreased glutathione levels (50% decrease, SMD -3.7, 95CI -6.2 to -1.2) and paraoxonase-1 activity (32% decrease, SMD -0.9, 95CI -1.3 to -0.4). Similar results were found when restricting the analyses to studies in which patients and controls were matched for age and body mass index. CONCLUSIONS Circulating markers of oxidative stress are abnormal in women with PCOS independent of weight excess. This finding suggests that oxidative stress may participate in the pathophysiology of this common disorder. SN - 1460-2369 UR - https://www.unboundmedicine.com/medline/citation/23303572/full_citation L2 - https://academic.oup.com/humupd/article-lookup/doi/10.1093/humupd/dms059 DB - PRIME DP - Unbound Medicine ER -