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Background: Polycystic ovary syndrome (PCOS) is highly associated with the metabolic syndrome (MetS): obesity, insulin resistance and atherogenic dyslipidemia. Women with PCOS-MetS are at higher risk of developing ischemic cardiovascular disease (CVD) and Type-2 Diabetes. First-line intervention in PCOS-MetS includes targeting diet and lifestyle, and metformin is commonly prescribed to treat insulin resistance, however these interventions have shown limited effectiveness to improve dyslipidemia. At present there are limited safe and efficious options to target atherogenic dyslipidemia in young women with PCOS. Fish oil (FO) and Icosapentyl ethyl supplementation have been shown to reduce fasting TG, apoB and to improve ischemic CVD outcomes. The efficacy of FO or as an adjunct therapy to metformin to improve ApoB-remnant lipemia in PCOS-MetS is unknown. The aim of this pilot study was to determine the effect of metformin, FO and FO-metformin combination treatment on fasting and non-fasting plasma TG and apoB-remnant lipoprotein metabolism in patients with PCOS-MetS. Methods: Participants diagnosed with PCOS aged 18-30yrs received dietary counselling and were randomly assigned to receive FO (n=8), metformin (n=7) or FO-metformin (n=12) treatment for 12 wks. Plasma lipids (TG and cholesterol), ApoB48 and ApoB100 lipoprotein metabolism were assessed in the fasting and non-fasting state using a standardized high-fat meal test. Results: At baseline, the fasting plasma TG, ApoB48 and ApoB100 was 238.0 ± 21.0 mg/dL, 9.00 ± 1.12 ug/ml and 290 ± 18.00 mg/dL. FO and FO-metformin decreased fasting plasma TG by 10% and 30% compared to the metformin treatment group (7%). Fasting ApoB48 was reduced 45%, 16% and 19% in FO-metformin, FO and metformin treatment groups, respectively. Non-fasting plasma TG and apoB48 lipoprotein area under the curve were reduced by 30% in the FO-metformin treatment group. Conclusion: These pilot findings demonstrate FO-metformin adjunct therapy may have greater efficacy to improve atherogenic apoB-dyslipidemia compared to metformin or FO alone in high-risk patients with PCOS-MetS. A larger clinical trial is warranted to determine the long term effects of FO-metformin intervention on apoB-dyslipidemia and atherosclerotic cardiovascular disease indices.

SUN-022 Metformin-Fish Oil Adjunct Therapy Improves apoB-Remnant Lipoprotein and Triglyceride Levels in Women with Polycystic Ovary Syndrome