Detection rate of IGF-1 variants and their implication to protein binding: study of over 240,000 patients.
Ievgen MotorykinJianying MuBradley S MillerAllison LiNigel J ClarkeMichael J McPhaulZengru WuPublished in: Clinical chemistry and laboratory medicine (2023)
In the IGF-1 test reports by LC-MS, the concentrations only account for half the total IGF-1 for patients with heterozygous IGF-1 variants. An IGF-1 variant may change the binding to its receptor and/or its binding proteins, affecting its activity and half-life in circulation. Variants located in or close to the C-domain may be pathogenic. Cross-species sequence comparison indicates that A38V and A70T may have some degree of pathogenicity.