Metformin Attenuates Early-Stage Atherosclerosis in Mildly Hyperglycemic Oikawa-Nagao Mice.

Abstract:

AIM:Although metformin treatment has been reported to reduce the risk of cardiovascular events in patients with type 2 diabetes, the underlying mechanisms have not been elucidated fully. Here we assessed atherosclerotic lesion formation in newly established 2 mouse lines with different blood glucose levels (Oikawa-Nagao Diabetes-Prone [ON-DP] and -Resistant [ON-DR]) to evaluate the effect of metformin on early-stage atherosclerosis. METHODS:Mildly hyperglycemic ON-DP and normoglycemic ON-DR female mice fed an atherogenic diet for 20 weeks (8-28 weeks of age). During the feeding period, one group of each mouse line received metformin in drinking water (0.1%), while another group received water alone as control. Atherosclerotic lesion formation in the aortic sinus was quantitively analyzed from the oil red O-stained area of the serial sections. RESULTS:Metformin treatment did not affect food intake, body weight, and casual blood glucose levels within each mouse line during the 20-week feeding period. Nevertheless, metformin treatment significantly reduced atherosclerotic lesion formation in the ON-DP mice (59% of control), whereas no significant effect of metformin was observed in the lesion size of the ON-DR mice. CONCLUSION:Metformin can attenuate early-stage atherogenesis in mildly hyperglycemic ON-DP mice. Pleiotropic effects of metformin, beyond its glucose-lowering action, may contribute to the antiatherogenic property in the early-stage atherosclerosis.

journal_name

J Atheroscler Thromb

authors

Asai A,Shuto Y,Nagao M,Kawahara M,Miyazawa T,Sugihara H,Oikawa S

doi

10.5551/jat.48223

subject

Has Abstract

pub_date

2019-12-01 00:00:00

pages

1075-1083

issue

12

eissn

1340-3478

issn

1880-3873

journal_volume

26

pub_type

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