文摘
Introduction 2-Methylene-19-nor-(20S)-1α,25-dihydroxyvitamin D3 (2MD) is a new analog of 1α,25-dihydroxyvitamin D3 (1,25-(OH)2D3) that has unique properties (distinct from 1α,25-dihydroxyvitamin D3) in stimulating osteoblasts to form bone in culture. This analog has now been extensively tested in aged ovariectomized female rats maintained on a diet adequate in calcium and phosphorus.