The effects of folate supplementation on inflammatory factors and biomarkers of oxidative stress in overweight and obese women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled clinical trial.

Abstract:

OBJECTIVE:This study was conducted to determine the effects of folate supplementation on inflammatory factors and biomarkers of oxidative stress among women with polycystic ovary syndrome (PCOS). DESIGN, PATIENTS AND MEASUREMENTS:This randomized, double-blind, placebo-controlled clinical trial was conducted among 69 women diagnosed with PCOS and aged 18-40 year old. Participants were randomly assigned to three groups receiving the following: (1) folate-1: 1 mg/d folate supplements (N = 23); (2) folate-5: 5 mg/d folate supplements (N = 23) and (3) placebo (N = 23) for 8 weeks. Fasting blood samples were taken at the beginning of the study and after 8 weeks to measure homocysteine (Hcy), inflammatory factors including high-sensitivity C-reactive protein (hs-CRP), nitric oxide (NO), biomarkers of oxidative stress including total antioxidant capacity (TAC), glutathione (GSH), malondialdehyde (MDA) and homoeostatic model assessment-beta cell function (HOMA-B). RESULTS:Supplementation with 5 mg/d folate resulted in reduced plasma Hcy (-2·23 vs -1·86 and 1·16 μm, respectively, P < 0·05), HOMA-B (-7·63 vs 1·43 and 13·66, respectively, P < 0·05), serum hs-CRP (-212·2 vs -262·4 and 729·8 μg/l, respectively, P < 0·05) and plasma MDA concentrations (-0·48 vs -0·24 and 0·69 μm, respectively, P < 0·01) compared with folate-1 and placebo groups. Furthermore, a significant rise in plasma TAC (0·64 vs -3·53 and -215·47 mm, respectively, P < 0·01) and GSH levels (162·1 vs 195·8 and -158·2 μm, respectively, P < 0·01) was also observed following the administration of 5 mg/d folate supplements compared with folate-1 and placebo groups. CONCLUSIONS:In conclusion, folate supplementation (5 mg/d) in women with PCOS had beneficial effects on inflammatory factors and biomarkers of oxidative stress.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Bahmani F,Karamali M,Shakeri H,Asemi Z

doi

10.1111/cen.12451

subject

Has Abstract

pub_date

2014-10-01 00:00:00

pages

582-7

issue

4

eissn

0300-0664

issn

1365-2265

journal_volume

81

pub_type

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