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Fertil Steril. 2015 Jul;104(1):200-6. doi: 10.1016/j.fertnstert.2015.03.027. Epub 2015 Apr 29.

Endocannabinoid system activation may be associated with insulin resistance in women with polycystic ovary syndrome.

Author information

1
Institute of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medical Research and Education, Taipei City Hospital, Taipei, Taiwan.
2
Department of Obstetrics and Gynecology, Taipei Tzu-Chi Hospital, The Buddhist Tzu-Chi Medical Foundation, Taipei, Taiwan; School of Medicine, Buddhist Tzu-Chi University, Hualien, Taiwan.
3
Department of Obstetrics and Gynecology, School of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
4
Department of Obstetrics and Gynecology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan; Department of Obstetrics and Gynecology, Taipei Medical University, Taipei, Taiwan.
5
Department of Obstetrics and Gynecology, School of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Obstetrics and Gynecology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. Electronic address: m002249@ms.skh.org.tw.

Abstract

OBJECTIVE:

To assess the levels of endocannabinoids and cannabinoid receptors (CB) 1 and 2 in women with polycystic ovary syndrome (PCOS).

DESIGN:

Case-control study.

SETTING:

University teaching hospital.

PATIENT(S):

In total, 20 women with PCOS and 20 healthy women in a control group, who were matched for body mass index and age, were enrolled in this study.

INTERVENTION(S):

The homeostasis model index was used to assess insulin resistance.

MAIN OUTCOME MEASURE(S):

Omental adipose tissue and human peripheral blood mononuclear cells (PBMCs) from PCOS and the controls were analyzed using real-time polymerase chain reactions for the expressions of CB1 and CB2. The levels of endocannabinoids were analyzed using high-performance liquid chromatography.

RESULT(S):

The levels of anandamide and 2-arachidonoylglycerol, and the expression of CB1 and CB2 mRNA (messenger ribonucleic acid) in the PBMCs were significantly higher in the women with PCOS than in the women serving as controls. We found that expression of CB1, but not CB2, in adipose tissue was significantly higher in the women with, vs. without, PCOS. The expressions of CB1 mRNA and endocannabinoids showed a significant positive correlation with 2-hour glucose and insulin levels 2 hours after glucose loading in the PBMCs and adipose tissue.

CONCLUSION(S):

Activation of endocannabinoids and overexpression of cannabinoid receptors, especially CB1, may be associated with insulin resistance in women with PCOS.

KEYWORDS:

Endocannabinoids; adipose tissue; cannabinoid receptor; human peripheral blood mononuclear cells

[Indexed for MEDLINE]

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