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11393778

Source:http://linkedlifedata.com/resource/pubmed/id/11393778

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pubmed-article:11393778pubmed:abstractTextThe determinants of cancellous bone turnover and trabecular structure are not understood in normal bone or skeletal disease. Bone remodeling is initiated by osteoclastic resorption followed by osteoblastic formation of new bone. Receptor activator of nuclear factor kappaB ligand (RANKL) is a newly described regulator of osteoclast formation and function, the activity of which appears to be a balance between interaction with its receptor RANK and with an antagonist binding protein osteoprotegerin (OPG). Therefore, we have examined the relationship between the expression of RANKL, RANK, and OPG and indices of bone structure and turnover in human cancellous bone from the proximal femur. Bone samples were obtained from individuals with osteoarthritis (OA) at joint replacement surgery and from autopsy controls. Histomorphometric analysis of these samples showed that eroded surface (ES/BS) and osteoid surface (OS/BS) were positively associated in both control (p < 0.001) and OA (p < 0.02), indicating that the processes of bone resorption and bone formation remain coupled in OA, as they are in controls. RANKL, OPG, and RANK messenger RNA (mRNA) were abundant in human cancellous bone, with significant differences between control and OA individuals. In coplotting the molecular and histomorphometric data, strong associations were found between the ratio of RANKL/OPG mRNA and the indices of bone turnover (RANKL/OPG vs. ES/BS: r = 0.93, p < 0.001; RANKL/OPG vs. OS/BS: r = 0.80, p < 0.001). These relationships were not evident in trabecular bone from severe OA, suggesting that bone turnover may be regulated differently in this disease. We propose that the effective concentration of RANKL is related causally to bone turnover.lld:pubmed
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pubmed-article:11393778pubmed:authorpubmed-author:FindlayD MDMlld:pubmed
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pubmed-article:11393778pubmed:authorpubmed-author:ForwoodM RMRlld:pubmed
pubmed-article:11393778pubmed:authorpubmed-author:KuliwabaJ SJSlld:pubmed
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pubmed-article:11393778pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:11393778pubmed:year2001lld:pubmed
pubmed-article:11393778pubmed:articleTitleThe ratio of messenger RNA levels of receptor activator of nuclear factor kappaB ligand to osteoprotegerin correlates with bone remodeling indices in normal human cancellous bone but not in osteoarthritis.lld:pubmed
pubmed-article:11393778pubmed:affiliationDivision of Tissue Pathology, Institute of Medical and Veterinary Science, Adelaide, Australia.lld:pubmed
pubmed-article:11393778pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11393778pubmed:publicationTypeComparative Studylld:pubmed
pubmed-article:11393778pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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