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Abstract Title:

Raloxifene-induced acceleration of platelet aggregation.

Abstract Source:

Intern Med. 2008;47(17):1523-8. Epub 2008 Sep 1. PMID: 18758128

Abstract Author(s):

Chiho Minamitani, Shinji Takai, Rie Matsushima-Nishiwaki, Yoshiteru Hanai, Takanobu Otuka, Osamu Kozawa, Haruhiko Tokuda

Article Affiliation:

Department of Clinical Laboratory, National Hospital for Geriatric Medicine, National Center for Geriatrics and Gerontology.

Abstract:

A 59-year-old postmenopausal woman diagnosed to have primary osteoporosis began to take 60 mg daily of oral raloxifene. The platelet aggregation induced by 1 microM adenosine diphosphate (ADP) and the alpha2-antiplasmin activity were accelerated significantly after 8 weeks from the beginning of raloxifene-treatment, and gradually deteriorated up to 24 weeks. ADP markedly caused the phosphorylation of Akt in the platelets obtained at 24 weeks. Although there were no subjective complaints at 24 weeks, the medication was stopped with her consent to avoid any adverse effects due to thrombus formation. The platelet hyper-aggregability and Akt phosphorylation induced by ADP disappeared at 4 weeks after the cessation of medication. These results strongly suggest that raloxifene caused the acceleration of platelet aggregation and subclinical thrombus formation through the Akt signal pathway in this case.

Study Type : Human: Case Report
Additional Links
Problem Substances : Raloxifene : CK(103) : AC(11)

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