Abstract:
:This review describes recent progress in the field of fibroblast growth factor receptors (FGFRs) with an emphasis on the role of FGFR mutants in skeletal malformations. This family of four receptors contains the most frequent germline mutations in humans. More than 75 mutations have been recorded, which account for more than seven skeletal syndromes. The common cause for all the mutant phenotypes is gain-of-function by receptor activation through three major mechanisms: receptor dimerization, kinase activation, and increased affinity for FGF. The severity of the disease is correlated with both the extent of receptor activation and the specific tissue in which the mutant receptor form is expressed. Paradoxically, the consequence of receptor activation is inhibition of chondrocyte cell growth through signaling pathways that are cell-type specific. The structure of the FGFR-FGF complex and its possible ternary complex with heparin explain the mechanism of receptor dimerization in the ectodomain and the possible contribution by some of the mutations to this process. Analysis of FGFR3 mutant mice produced by gene targeting as models for human disease, and studies in cell lines, have begun to delineate the novel signaling pathways of FGFR3 and to define possible targets for therapy.
journal_name
IUBMB Lifejournal_title
IUBMB lifeauthors
Kannan K,Givol Ddoi
10.1080/713803609keywords:
subject
Has Abstractpub_date
2000-03-01 00:00:00pages
197-205issue
3eissn
1521-6543issn
1521-6551journal_volume
49pub_type
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