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Metabolic Aspects in the Polycystic Ovary Syndrome
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Women's and Children's Health. (reproduktiv hälsa)
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders among women of childbearing age and is associated with a number of metabolic disturbances. It has been hypothesised these women carry an increased risk of developing cardiovascular diseases (CVD) with advancing age.

The first aim of this thesis was to establish the prevalence of PCOS-related symptoms in Northern Sweden. The Northern part of the WHO MONICA project was used for this purpose. Based on self-reported menstrual disturbances and hirsutism together with biochemical analyses of free androgen index, the estimated prevalence of PCOS in Northern Sweden was 4.8%, which corresponded with previous prevalence studies.

Disturbances in the fibrinolytic system are predictors of future cardiovascular events and measurements of plasminogen activator inhibitor 1 (PAI-1) activity and tissue plasminogen activator (tPA) mass concentration may be used to assess fibrinolytic activity in women with PCOS. From the findings, over-weight women with PCOS had impaired fibrinolysis, especially if they displayed objective biochemical markers of hyperandrogenism. Conversely, lean women with PCOS, displayed no signs of disturbed fibrinolysis.

The adipose tissue is an active endocrine organ that produces and releases hormones, pro- and anti-inflammatory cytokines, and chemoattractant cytokines. Proinflammatory molecules produced by adipose tissue can be active participants in the development of insulin resistance and the increased risk of cardiovascular disease associated with obesity. The findings suggested being overweight, rather than the PCOS diagnosis per se, was the main explanatory variable for elevated adipose tissue inflammation in PCOS patients.

Weight reduction is the primary target for intervention in overweight and obese women with PCOS. When this thesis was planned, no placebo-controlled trials on anti-obesity drugs in women with PCOS had been conducted. Sibutramine in combination with lifestyle intervention resulted in significant weight reduction in overweight women with PCOS. In addition to the weight loss, sibutramine appeared to have a beneficial effect on metabolic and cardiovascular risk factors.

 

 

 

 

 

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2010. , p. 65
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine, ISSN 1651-6206 ; 534
Keywords [en]
PCOS, prevalence, fibrinolysis, inflammatory markers, over weight
National Category
Gynaecology, Obstetrics and Reproductive Medicine
Research subject
Obstetrics and Gynaecology
Identifiers
URN: urn:nbn:se:uu:diva-120235ISBN: 978-91-554-7746-2 (print)OAI: oai:DiVA.org:uu-120235DiVA, id: diva2:302969
Public defence
2010-04-23, Konferenscentrum, Sunderby sjukhus, Luleå, 12:00 (Swedish)
Opponent
Supervisors
Available from: 2010-04-01 Created: 2010-03-10 Last updated: 2025-02-11Bibliographically approved
List of papers
1. Prevalence of symptoms associated with polycystic ovary syndrome
Open this publication in new window or tab >>Prevalence of symptoms associated with polycystic ovary syndrome
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2008 (English)In: International Journal of Gynecology & Obstetrics, ISSN 0020-7292, E-ISSN 1879-3479, Vol. 102, no 1, p. 39-43Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: To establish the prevalence of symptoms associated with polycystic ovary syndrome (PCOS) in a population-based sample of women from Northern Sweden, and to relate symptoms of PCOS to features of metabolic syndrome. METHODS: A population-based survey of 147 women under 40 years of age sampled from 267 eligible women from the Northern Sweden component of the World Health Organization's MONICA study. The study involved questionnaires, physical examination, and assays of testosterone and sex hormone-binding globulin. RESULTS: The estimated prevalence of symptoms associated with PCOS was 4.8% in the study population. Features of metabolic syndrome were more common in women with signs of hyperandrogenism than in healthy controls. CONCLUSION: The estimated prevalence of PCOS in Northern Sweden corresponds with other prevalence studies. A simple questionnaire and analysis of the free androgen index are sufficient to detect the subgroup with the highest risk for metabolic syndrome.

Keywords
metabolic syndrome, obesity, polycystic ovary syndrome, Sweden
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:uu:diva-102819 (URN)10.1016/j.ijgo.2008.01.023 (DOI)000257613500009 ()18321516 (PubMedID)
Available from: 2009-05-12 Created: 2009-05-12 Last updated: 2022-01-28Bibliographically approved
2. Tissue Plasminogen Activator and Plasminogen Activator Inhibitor 1 in Overweight and Lean Patients with Polycystic Ovary Syndrome
Open this publication in new window or tab >>Tissue Plasminogen Activator and Plasminogen Activator Inhibitor 1 in Overweight and Lean Patients with Polycystic Ovary Syndrome
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(English)Manuscript (preprint) (Other (popular science, discussion, etc.))
Abstract [en]

Objective: Disturbances in the fibrinolytic system are predictors of future cardiovascular events. The aim of the present study was to compare PAI-1 activity and tPA mass concentration between patients with polycystic ovary syndrome (PCOS) and control subjects.

Design: 135 PCOS patients (lean and overweight) and 81 healthy controls were recruited for the study. Blood samples for PAI-1 activity and tPA mass were collected together with anthropometric measures.

Results: Overweigth PCOS patients displayed increased tPA mass concentration in comparison with controls (p < 0.05), and this finding was consistent regardless of whether patients displayed signs of hyperandrogenism or not. When hyperandrogenism was introduced as a prerequisite for the PCOS diagnosis, overweight PCOS patients displayed increased PAI-1 activity as well, p < 0.05. Lean PCOS patients did not differ in terms of PAI-1 activity or tPA mass concentration in comparison to controls.

Conclusion: Overweight women with PCOS have impaired fibrinolysis, in particular if they also display objective biochemical markers of hyperandrogenism.

Keywords
polycystic ovary syndrome, PAI-1, tPA, obesity, free androgen index (FAI)
National Category
Gynaecology, Obstetrics and Reproductive Medicine
Research subject
Obstetrics and Gynaecology
Identifiers
urn:nbn:se:uu:diva-120221 (URN)
Available from: 2010-03-10 Created: 2010-03-10 Last updated: 2025-02-11Bibliographically approved
3. Effect of sibutramine on weight reduction in women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled trial
Open this publication in new window or tab >>Effect of sibutramine on weight reduction in women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled trial
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2008 (English)In: Fertility and Sterility, ISSN 0015-0282, E-ISSN 1556-5653, Vol. 89, no 5, p. 1221-1228Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: To examine the efficacy of sibutramine together with brief lifestyle modification for weight reduction in obese women with polycystic ovary syndrome (PCOS). DESIGN: Investigator-initiated, multicenter, double-blind, randomized, parallel-group clinical trial. SETTING: Departments of Obstetrics and Gynecology in primary care, referral centers, and private practice. PATIENT(S): Forty-two patients with confirmed PCOS were included in the study, and 34 patients completed the study. INTERVENTION: Sibutramine 15 mg once daily together with brief lifestyle modification was compare with placebo together with brief lifestyle modification. MAIN OUTCOME MEASURE(S): The primary endpoint was to assess weight loss. Secondary endpoints included the efficacy of sibutramine for treatment of menstrual pattern and cardiovascular risk factors. RESULT(S): After 6 months the sibutramine group had lost 7.8 +/- 5.1 kg compared with a weight loss of 2.8 +/- 6.2 kg in the placebo group. Sibutramine treatment resulted in significant decreases in apolipoprotein B, apolipoprotein B/apolipoprotein A ratio, triglycerides, and cystatin C levels. CONCLUSION(S): Sibutramine in combination with lifestyle intervention results in significant weight reduction in obese patients with PCOS. In addition to the weight loss, sibutramine seems to have beneficial effects on metabolic and cardiovascular risk factors.

Keywords
Polycystic ovary syndrome, sibutramine, randomized clinical trial, obesity
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:uu:diva-12978 (URN)10.1016/j.fertnstert.2007.05.002 (DOI)000256075700027 ()17603048 (PubMedID)
Available from: 2008-01-19 Created: 2008-01-19 Last updated: 2022-01-28Bibliographically approved
4. Adipose tissue inflammation in polycystic ovary syndrome (PCOS)
Open this publication in new window or tab >>Adipose tissue inflammation in polycystic ovary syndrome (PCOS)
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(English)Manuscript (preprint) (Other academic)
Abstract [en]

Context: Previous studies have indicated that peripheral circulating markers of inflammation are elevated in women with polycystic ovary syndrome (PCOS). Thus far, no studies concerning adipose tissue expression of inflammatory markers have been conducted in PCOS patients.

Objectives: The aim of the study was to investigate if PCOS patients display increased adipose tissue expression of inflammatory markers.

Design and Settings: Cross-sectional study at three out-patient gynecologic departments.

Participants and Approach: Ten lean PCOS patients, 20 overweight PCOS patients, and 20 overweight controls underwent subcutaneous fat biopsies and blood samples.

Main Outcome Measures: Adipose tissue gene expression of inflammatory markers, circulating markers of inflammation, and obesity-related metabolic disturbances.

Results: Overweight PCOS patients had higher relative amounts of adipose tissue CCL2, CCR2, TNF-a, IL-18, CD14 and CD163 mRNA expression compared to lean PCOS women. There were no differences between overweight PCOS patients and overweight control subjects in this respect. Within the PCOS group, markers of adipose tissue inflammation correlated significantly with obesity-related metabolic disturbances, but when data were adjusted for age and BMI most correlations were lost.

Conclusion: Overweight, rather than the PCOS diagnosis per se, appears to be the main explanatory variable for elevated adipose tissue inflammation in PCOS patients. Our findings suggest that lean PCOS patients carry less risk for metabolic complications later on in life.

Keywords
Polycystic ovary syndrome, adipose tissue, inflammatory markers, metabolic syndrome, overweight
National Category
Obstetrics, Gynecology and Reproductive Medicine
Research subject
Obstetrics and Gynaecology
Identifiers
urn:nbn:se:uu:diva-120223 (URN)
Available from: 2010-03-10 Created: 2010-03-10 Last updated: 2010-03-10Bibliographically approved

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Lindholm, Åsa Maria

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