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Current Genomics

Editor-in-Chief

ISSN (Print): 1389-2029
ISSN (Online): 1875-5488

EXTraordinary Bones: Functional and Genetic Analysis of the EXT Gene Family

Author(s): Carol A. Wise

Volume 2, Issue 2, 2001

Page: [125 - 140] Pages: 16

DOI: 10.2174/1389202013350959

Price: $65

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Abstract

Far from serving as an inert skeletal scaffold, bone is a dynamic tissue that cycles through tightly coordinated cycles of developmental growth and regeneration. Bone growth, which determines the overall growth of vertebrates, is well-characterized histologically and increasingly understood at the molecular level. In recent years traditional positional cloning applied to diseases of simple Mendelian inheritance have revealed genes important in the proper formation of bone. Functional studies of these genes, aided considerably by insights provided by studies of homologous genes in animal models and other organisms, have led to significant advances in our understanding of the pathways of mammalian bone morphogenesis. One such disorder, hereditary multiple exostoses, is caused by members of the EXT tumor suppressor gene family. Progress in the molecular dissection of this disorder, with emphasis on important genomic techniques and strategies, is reviewed herein. We are now challenged to reconstruct the biochemical pathway of chondrogenesis / osteogenesis defined by the EXT genes as a step toward therapeutic control of bone growth and malignancy.

Keywords: EXT Gene Family, Hereditary multiple exostosis (HME), glycosamino-glycans (GAGs), GROWTH FACTORS, insulin-like growth factor (IGF), transforming growth factor beta (TGF-b), bone morphogenetic proteins (BMPs), Parathyroid hormone (PTH), parathyroid-related peptide (PTHrP), vascular endothelial growth factor (VEGF)

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