Conditional Deletion of Insulin-Like Growth Factor-I in Collagen Type 1α2-Expressing Cells Results in Postnatal Lethality and a Dramatic Reduction in Bone Accretion

Abstract excerpt

IGF-I acts through endocrine and local, autocrine/paracrine routes. Disruption of both endocrine and local IGF-I action leads to neonatal lethality and impaired growth in various tissues including bone; however, the severity of growth and skeletal phenotype caused by disruption of endocrine IGF-I action is far less than with total IGF-I disruption. Based on these data and the fact that bone cells express IGF-I in...

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