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Functional significance of insulin-like growth factor binding proteins-5(IGFBP-5)

ReferenceS15716
Principal Investigator / Supervisor Dr Jennifer Pell
Co-Investigators /
Co-Supervisors
Institution Babraham Institute
DepartmentDevelopmental Genetics and Imprinting
Funding typeResearch
Value (£) 178,660
StatusCompleted
TypeResearch Grant
Start date 11/02/2002
End date 10/02/2005
Duration36 months

Abstract

IGFBP-5 overexpressing mice are severely growth retarded (40-50 percent) pre- and postnatally, skeletal muscle mass being the most acutely decreased. We will examine the hypothesis that IGFBP-5 has functional significance during growth and development by characterising key mechanisms in IGFBP-5 action. Three possibilities exist: i) IGFBP-5 has only IGF-modulating effects, ii) IGFBP-5 has IGF-independent actions due to specific functional motifs (nuclear localisation, phosphorylation), iii) co- operation between both these properties confers gain-of- function to the IGFs. Endogenous IGFBP-5 is specifically upregulated during myoblast differentiation; therefore myogenesis is an excellent physiological model for IGFBP- 5 action. Integrated in vivo (transgenic) and in vitro (myoblast culture) approaches will be combined with IGFBP-5 site-directed mutagenesis.

Summary

unavailable
Committee Closed Committee - Animal Sciences (AS)
Research TopicsX – not assigned to a current Research Topic
Research PriorityX – Research Priority information not available
Research Initiative X - not in an Initiative
Funding SchemeX – not Funded via a specific Funding Scheme
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