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1.1 Severe Primary IGF-1 Deficiency (Primary IGFD)
INCRELEX® (mecasermin [rDNA origin] injection) is indicated for the treatment of:
Severe Primary IGF-1 deficiency (IGFD) is defined by:
Severe Primary IGFD includes classical and other forms of growth hormone insensitivity. Patients with Primary IGFD may have mutations in the GH receptor (GHR), post-GHR signaling pathway including the IGF-1 gene. They are not GH deficient, and therefore, they cannot be expected to respond adequately to exogenous GH treatment.
INCRELEX® is not intended for use in subjects with secondary forms of IGF-1 deficiency, such as GH deficiency, malnutrition, hypothyroidism, or chronic treatment with pharmacologic doses of anti-inflammatory steroids. Thyroid and nutritional deficiencies should be corrected before initiating INCRELEX® treatment.
Limitations of use: INCRELEX® is not a substitute to GH for approved GH indications.
INCRELEX® (mecasermin [rDNA origin] injection) contains human insulin-like growth factor-1 (rhIGF-1) produced by recombinant DNA technology. IGF-1 consists of 70 amino acids in a single chain with three intramolecular disulfide bridges and a molecular weight of 7649 daltons. The amino acid sequence of the product is identical to that of endogenous human IGF-1. The rhIGF-1 protein is synthesized in bacteria (E. coli) that have been modified by the addition of the gene for human IGF-1.
INCRELEX® is a sterile, aqueous, clear and colorless solution intended for subcutaneous injection. Each multi-dose vial of INCRELEX® contains 10 mg per mL mecasermin, 9 mg per mL benzyl alcohol, 5.84 mg per mL sodium chloride, 2 mg per mL polysorbate 20, and 0.05M acetate at a pH of approximately 5.4.