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1[alpha],25‐dihydroxyvitamin D 3 enhances annexin II dependent proliferation of osteoblasts
Author(s) -
Maier S.M.,
Scherer S.J.,
Seifert M.,
Hanselmann R.G.,
Schleehuber Y.,
Edelmann L.,
Reichrath J.,
Krohne G.,
Rescher U.,
Seidl W.,
Mutschler W.,
Claes L.,
Welter C.,
Schartl M.
Publication year - 2006
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/jcb.21076
Subject(s) - annexin , microbiology and biotechnology , chemistry , osteoblast , annexin a2 , downregulation and upregulation , annexin a1 , cell growth , endocrinology , medicine , cell , biology , in vitro , biochemistry , gene
Cells experience a variety of physiological and non‐physiological stresses and consequently have appropriate mechanisms to deal with such deviations from homeostasis. Particularly subject to mechanical stress and shear forces are the cells that make up the bones. Osteoblastic cells can interpret this stress as a stimulus for proliferation; however, the molecular mechanisms underlying this phenomenon are poorly understood. We have identified annexin II as being specifically upregulated in mechanically stressed osteoblasts and found that increased levels of this protein are necessary for 1[alpha],25‐dihydroxyvitamin D 3 mediated augmentation of the proliferative response of osteoblasts after mechanical stress. Our data demonstrate a novel interaction between 1[alpha],25‐dihydroxyvitamin D 3 and annexin II in the proliferative response of osteoblasts as well as a novel function for annexin II in the stress response. These findings may offer new therapeutic opportunities for conditions that require regenerative osteoblastic activity such as osteoporosis. J. Cell. Biochem. 100: 679–692, 2007. © 2006 Wiley‐Liss, Inc.