Abstract
The six members of the family of insulin-like growth factor (IGF) binding proteins (IGFBPs) were originally characterized as passive reservoirs of circulating IGFs, but they are now understood to have many actions beyond their endocrine role in IGF transport. IGFBPs also function in the pericellular and intracellular compartments to regulate cell growth and survival - they interact with many proteins, in addition to their canonical ligands IGF-I and IGF-II. Intranuclear roles of IGFBPs in transcriptional regulation, induction of apoptosis and DNA damage repair point to their intimate involvement in tumour development, progression and resistance to treatment. Tissue or circulating IGFBPs might also be useful as prognostic biomarkers.
Publication types
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Research Support, Non-U.S. Gov't
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Review
MeSH terms
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Animals
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Apoptosis
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Biological Availability
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Biomarkers / metabolism
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Cell Nucleus / metabolism
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Cell Proliferation
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Cell Survival
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DNA Damage
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Humans
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Insulin-Like Growth Factor Binding Protein 1 / metabolism
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Insulin-Like Growth Factor Binding Protein 2 / metabolism
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Insulin-Like Growth Factor Binding Protein 3 / metabolism
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Insulin-Like Growth Factor Binding Proteins / metabolism*
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Ligands
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Neoplasms / metabolism*
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Prognosis
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Protein Structure, Tertiary
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Somatomedins / metabolism
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Transcription, Genetic
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Transforming Growth Factor beta / metabolism
Substances
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Biomarkers
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Insulin-Like Growth Factor Binding Protein 1
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Insulin-Like Growth Factor Binding Protein 2
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Insulin-Like Growth Factor Binding Protein 3
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Insulin-Like Growth Factor Binding Proteins
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Ligands
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Somatomedins
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Transforming Growth Factor beta