Recombinant IGF-I therapy in insulin-dependent diabetes mellitus.
Recombinant insulin-like growth factor-I (IGF) has both anabolic and insulin-like effects. In adolescent insulin-dependent diabetes mellitus (IDDM), the GH/IGF-I axis is abnormal, with elevation of growth hormone (GH) secretion and subnormal IGF-I levels. The elevated GH levels contribute to pubertal insulin resistance, making glycaemic control difficult to achieve. Theoretically, rhIGF-I could replace IGF-1 and lower GH by negative feedback effects, hence improving glycaemic control. Two preliminary studies are described in this paper. In the first study, rhIGF-I 40 micrograms/kg s.c. was given as an adjunct to insulin at 1800 h. RhIGF-I induced a significant fall in mean overnight GH secretion and in the insulin infusion rate required to maintain euglycaemia. In the second study, rhIGF-I was given in a dose of 40 micrograms/kg s.c. for 1 month. The dose of isophane insulin fell during puberty, as did HbA1c. These preliminary studies suggest that rhIGF-I given in conjunction with regular insulin therapy may reverse abnormalities in the GH/IGF-I axis and therefore contribute to improvement of glycaemic control in adolescents with IDDM.
Savage
M O
MO
Division of Paediatric Endocrinology, St Bartholomew's Hospital, London, U.K.
Dunger
D B
DB
D000293:Adolescent; D018849:Controlled Clinical Trials as Topic; D003922:Diabetes Mellitus, Type 1 / Q000188:drug therapy* / Q000378:metabolism; D004334:Drug Administration Schedule; D013006:Growth Hormone / Q000378:metabolism; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000378:metabolism / Q000627:therapeutic use*; D011994:Recombinant Proteins / Q000378:metabolism / Q000627:therapeutic use; D012016:Reference Values
D011994:Recombinant Proteins; D007334:Insulin-Like Growth Factor I; D013006:Growth Hormone