Biomedical Engineering Reference
In-Depth Information
(b) the ability of OPG to act as a bridge between endothelial cells and
leukocytes.
4. Studies in mouse models did not support a major role of OPG in diseases
associated with inl ammation and even suggested protective ef ects.
Whether these i ndings represent species dif erences from humans or
other experimental ef ects is currently unclear.
Definition of Terms
Angiopoietin-2: A regulator stored in Weibel-Palade bodies within the endothelium that,
evidence now suggests, plays an important role in controlling the activation state of the
endothelium.
Intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1)
and E-selectin (CD62E): Endothelial expressed adhesion molecules important in stages
of leukocyte adhesion to the endothelium.
Leukocytes: White blood cells that are key components of the immune response. h ey
defend the body against infection and bacteria.
Osteoprotegerin: A soluble glycoprotein originally identii ed to protect bone from
breakdown by inhibiting osteoclasts. Subsequently it has been associated with a wide
range of human diseases.
RANKL: A regulator of bone remodelling; RANK is the receptor for this molecule.
References
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C.M. Giachelli, and M.E. Rosenfeld. 2006. Osteoprotegerin inactivation accelerates
advanced atherosclerotic lesion progression and calcii cation in older ApoE-/- mice.
Arterioscler. h romb. Vasc. Biol. 26: 2117-2124.
Bernstein, C.N. and M. Sargent, and W.D. Leslie. 2005. Serum osteoprotegerin is increased
in Crohn's disease: a population-based case control study. Inl amm. Bowel Dis. 11: 325-
330.
Bucay, N. and I. Sarosi, C.R. Dunstan, S. Morony, J. Tarpley, C. Capparelli, S. Scully, H.L.
Tan, W. Xu, D.L. Lacey, W.J. Boyle, and W.S. Simonet. 1998. Osteoprotegerin-dei cient
mice develop early onset osteoporosis and arterial calcii cation. Genes Dev. 12: 1260-
1268.
Clancy, P. and L. Oliver, R. Jayalath, P. Buttner, and J. Golledge. 2006. Assessment of a serum
assay for quantii cation of abdominal aortic calcii cation. Arterioscler. h romb. Vasc.
Biol. 26: 2574-2576.
Collin-Osdoby, P. 2004. Regulation of vascular calcii cation by osteoclast regulatory factors
RANKL and osteoprotegerin. Circ. Res. 95: 1046-1057.
Emery, J.G. and P. McDonnell, M.B. Burke, K.C. Deen, S. Lyn, C. Silverman, et al. 1998.
Osteoprotegerin is a receptor for the cytotoxic ligand TRAIL. J. Biol. Chem. 273: 14363-
14367.
 
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