Efficacy and tolerability of an individualized dosing regimen for adult human growth hormone replacement therapy in comparison with fixed body weight-based dosing.
Hoffman AR - J Clin Endocrinol Metab - 01-JUL-2004; 89(7): 3224-33
From NIH/NLM MEDLINE
NLM Citation ID:
15240596 (PubMed)
Full Source Title:
Journal of Clinical Endocrinology and Metabolism
Publication Type:
Clinical Trial; Journal Article; Multicenter Study; Randomized Controlled Trial
Language:
English
Author Affiliation:
Medical Service, Veterans Affairs Palo Alto Health Care System and Stanford University, 3801 Miranda Avenue, Palo Alto, CA 94304, USA. arhoffman@stanford.edu
Authors:
Hoffman AR; Strasburger CJ; Zagar A; Blum WF; Kehely A; Hartman ML
T002 Study Group
Abstract:
To determine whether an individualized dose titration regimen (ID) for adult HGH replacement therapy would have similar efficacy and better tolerability than a fixed body weight-based dosing regimen (FD), 387 adults with GH deficiency were randomized to FD (n = 200) or ID (n = 187) for 32 wk. In FD, subjects received sequentially 4, 8, and 12 microg/kg.d HGH. ID was started at 0.2 mg/d and increased by 0.2-mg/d increments, based on clinical and serum IGF-I responses, to a maximum of 0.8 mg/d. Increases (mean +/- sd) in serum IGF-I were similar in both groups (FD, 110.2 +/- 87.8 vs. ID, 99.6 +/- 77.7 microg/liter, P = 0.20) despite higher final GH doses in FD (0.70 +/- 0.32 vs. 0.54 +/- 0.22 mg/d, P < 0.001). Favorable changes in several efficacy measures were observed with no significant differences between the FD and ID groups: lean body mass increased; health-related quality of life improved; and abdominal fat mass, hip circumference, sum of skinfolds, and total and low-density lipoprotein cholesterol decreased. The decrease in fat mass was greater with FD than ID for men (-2.7 +/- 2.7 kg vs. -1.8 +/- 2.5 kg, P = 0.04) but not for women (-2.1 +/- 2.4 vs. -2.0 +/- 3.8 kg). The change in waist circumference was greater with FD than ID for women but not for men. There was a significant reduction of systolic blood pressure in ID but not in FD. The adverse event profile was similar between FD and ID except that ID had a lower occurrence of peripheral edema (9.1% vs. 16.5%, P = 0.03) and rash (1.1% vs. 5.5%, P = 0.02) than FD. In summary, the use of ID resulted in improved tolerability and similar efficacy compared with FD. We conclude that HGH replacement therapy should be initiated at a low dose and titrated to a dose producing maximal benefits without adverse side effects and an IGF-I level within the age- and sex-adjusted normal range.
Major Subjects:
- Body Weight
- Hormone Replacement Therapy / adverse effects
- Human Growth Hormone / * administration & dosage / * adverse effects / deficiency
- Insulin-Like Growth Factor I / * metabolism
Additional Subjects:
- Adult
- Dose-Response Relationship, Drug
- Female
- Humans
- Male
- Metabolism, Inborn Errors / drug therapy / physiopathology
- Middle Aged
- Quality of Life
- Questionnaires
- Treatment Outcome
Chemical Compound Name:
12629-01-5(Human Growth Hormone); 67763-96-6(Insulin-Like Growth Factor I)