Acid-Labile Subunit of Human Insulin-Like Growth Factor-Binding Protein Complex: Measurement, Molecular, and Clinical Evaluation
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چکیده
منابع مشابه
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In the human circulation, the insulin-like growth factors (IGFs) circulate as part of a growth hormone-dependent 125- to 150-kDa complex. This complex has been postulated to contain, in addition to IGFs and one or more IGF-binding proteins, an acid-labile subunit (ALS) which does not itself bind IGFs. In this study, the ALS has been purified 1600-fold from human serum, and its binding propertie...
متن کاملCharacterization of insulin-like growth factor-free interaction between insulin-like growth factor binding protein 3 and acid labile subunit expressed from Xenopus oocytes.
The acid-labile subunit (ALS) is known to interact with the IGF binding protein (IGFBP) in the presence of insulin-like growth factors (IGFs). Studies, however, indicate that ALS forms a doublet with IGFBP3, independent of IGFs. To characterize the structural domain required for the IGF-free ALS-IGFBP3 interaction, seven recombinant human IGFBP3 mutants were generated: three deletion mutants an...
متن کاملInsulin-like growth factor-binding protein 5 complexes with the acid-labile subunit. Role of the carboxyl-terminal domain.
We have recently shown that insulin-like growth factor (IGF)-binding protein 5 forms ternary complexes with IGF-I or IGF-II and the acid-labile subunit (ALS) (Twigg, S. M., and Baxter, R. C. (1998) J. Biol. Chem. 273, 6074-6079). Because IGF-binding protein 3 (IGFBP-3) binds to ALS through its basic carboxyl-terminal domain, we tested whether a homologous region present in IGFBP-5 is involved i...
متن کاملCloning and characterization of the rat gene for the acid-labile subunit of the insulin-like growth factor binding protein complex.
The acid-labile subunit (ALS) of the ternary insulin-like growth factor-binding protein complex has a central role in controlling the bioavailability of circulating insulin-like growth factors. We have shown that gene expression of ALS is regulated by a number of factors, particularly growth hormone. Our aim was to characterize the ALS gene in order to define the mechanism of its regulation. So...
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ژورنال
عنوان ژورنال: The Journal of Clinical Endocrinology & Metabolism
سال: 1997
ISSN: 0021-972X,1945-7197
DOI: 10.1210/jcem.82.12.4415