title: Effects of IGF-I on renal function in end-stage chronic renal failure.
abstract: To determine whether insulin-like growth factor I (IGF-I) affects kidney function in patients with end-stage chronic renal failure, we administered recombinant human IGF-I (rhIGF-I) (100 micrograms/kg body wt subcutaneously twice daily) to nine individuals with baseline inulin clearances below 21 ml/min/1.73 m2. Four patients were treated for four days (short-term treatment) and five for periods between 13 and 27 days (long-term treatment). Administration of rhIGF-I increased inulin clearance, p-aminohippurate (PAH) clearance and the percent tubular reabsorption of filtered phosphate, and decreased plasma creatinine, blood urea nitrogen (BUN) and plasma phosphate during short-term administration. Kidney volume was unchanged in patients receiving the growth factor. rhIGF-I did not cause weight gain, proteinuria or hypoglycemia. Inulin clearance was not increased significantly above baseline after 13 or 20 days of IGF-I administration. PAH clearance remained elevated after 13 days, but not after 20 days of IGF-I. Levels of total circulating IGF-I were elevated above basal levels during the entire course of long-term IGF-I administration. In contrast, levels of circulating IGF binding protein 3 (IGFBP3) declined over time. Side effects related to IGF-I forced discontinuation of its use in two of five patients undergoing long-term treatment, and side-effects possibly related to IGF-I prompted discontinuation of its use in two others. We conclude that rhIGF-I can enhance glomerular filtration rate and renal plasma flow when administered short-term to humans with end-stage chronic renal renal failure. Further studies will be required to define its efficacy and usefulness long-term.
authors.affiliation: George M. O'Brien Kidney and Urological Diseases Center, Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri.
authors.forename: S B
authors.initials: SB
authors.lastname: Miller
authors.forename: M
authors.initials: M
authors.lastname: Moulton
authors.forename: M
authors.initials: M
authors.lastname: O'Shea
authors.forename: M R
authors.initials: MR
authors.lastname: Hammerman
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005919:Glomerular Filtration Rate / Q000187:drug effects; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000009:adverse effects / Q000494:pharmacology*; D007444:Inulin / Q000378:metabolism; D007668:Kidney / Q000187:drug effects / Q000503:physiopathology*; D007676:Kidney Failure, Chronic / Q000188:drug therapy / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011994:Recombinant Proteins; D012079:Renal Circulation / Q000187:drug effects; D010130:p-Aminohippuric Acid / Q000378:metabolism
chemical_list: D011994:Recombinant Proteins; D007334:Insulin-Like Growth Factor I; D007444:Inulin; D010130:p-Aminohippuric Acid