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Sympathectomy, Which Induces Membranous Bone Remodeling, Has No Effect on Endochondral Long Bone Remodeling In Vivo
Author(s) -
Sherman Bret E.,
Chole Richard A.
Publication year - 2000
Publication title -
journal of bone and mineral research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.882
H-Index - 241
eISSN - 1523-4681
pISSN - 0884-0431
DOI - 10.1359/jbmr.2000.15.7.1354
Subject(s) - osteoclast , sympathectomy , endochondral ossification , bone resorption , bone remodeling , resorption , endocrinology , medicine , anatomy , chemistry , cartilage , receptor
Sympathectomy has been shown to induce resorption within the membranous middle ear bone of gerbils. It is unknown whether sympathectomy exerts a similar effect on endochondral long bone. In the present study, guanethidine sulfate (GS) and 6‐hydroxydopamine (HDA) were administered to gerbils to induce sympathectomy. One week later, samples of middle ear bulla bone and radial long bone were harvested and assessed for osteoclastic activity. Histomorphometric analysis showed both pharmacologic sympathectomy with GS and chemical sympathectomy with HDA significantly increased the osteoclast counts and osteoclast surfaces of bulla bone samples but not radial long bone samples, respectively. In contrast, HDA but not GS increased the osteoclast profile area of both long bone and membranous bone samples when compared with vehicle‐treated controls. Sympathectomy, induced both chemically and pharmacologically, thus has been shown to increase resorption in membranous bone but not endochondral long bone in the gerbilline model.