Primary acid-labile subunit deficiency due to recessive IGFALS mutations results in postnatal growth deficit associated with low circulating insulin growth factor (IGF)-I, IGF binding protein-3 levels, and hyperinsulinemia.

Abstract excerpt

CONTEXT: Up to 90% of circulating IGF-I and IGF-II are carried bound to either IGF binding protein (IGFBP)-3 or IGFBP-5 and the acid-labile subunit (ALS) in the form of tertiary complexes that extend their circulating half-life. Three cases of complete ALS deficiency have been recently reported in short-stature patients with very low circulating IGF-I and IGFBP-3 levels who presented with homozygous or compound...

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