Metformin attenuates early-stage atherosclerosis in mildly hyperglycemic Oikawa-Nagao mice

Akira Asai, Yuki Shuto, Mototsugu Nagao, Momoyo Kawahara, Teruo Miyazawa, Hitoshi Sugihara, Shinichi Oikawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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 DiabetesProne [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.

Original languageEnglish
Pages (from-to)1075-1083
Number of pages9
JournalJournal of atherosclerosis and thrombosis
Issue number12
Publication statusPublished - 2019


  • Atherosclerosis
  • Diabetes
  • Impaired glucose tolerance
  • Metformin
  • Oikawa-Nagao mouse

ASJC Scopus subject areas

  • Internal Medicine
  • Cardiology and Cardiovascular Medicine
  • Biochemistry, medical


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