Efficacy of needle-free administration of recombinant human growth hormone in adults with growth hormone deficiency.
OBJECTIVE
Needle-free administration of recombinant human growth hormone (rhGH) is effective in the treatment of growth hormone deficiency (GHD) in children, but has not been studied in adult patients. Therefore, we evaluated the efficacy of needle-free administration of rhGH in adults with GHD.


METHODS
Insulin-like growth factor-I (IGF-I) concentrations were compared in newly diagnosed patients with GHD (n = 21) and in patients previously treated by subcutaneous injection of rhGH (switchers, n = 34), at baseline, 12 months and 24 months.


RESULTS
In the new patients, IGF-I standard deviation scores (SDS) increased from - 1.82 +/- 0.46 to + 0.75 +/- 0.33 at 12 months and to + 0.65 +/- 0.41 at 24 months (P < or = 0.001 vs. baseline). In switchers, IGF-I SDS remained unchanged with values of + 0.98 +/- 0.32 at baseline, + 0.87 +/- 0.23 at 12 months and + 0.73 +/- 0.29 at 24 months (P = 0.696 vs. baseline). In new patients, the rhGH dose was 0.46 +/- 0.03 mg day(-1) at 12 months and 0.47 +/- 0.03 mg day(-1) at 24 months. In switchers, the rhGH dose was 0.53 +/- 0.04 mg day(-1) at baseline (s.c. injection), 0.52 +/- 0.03 mg day(-1) at 12 months and 0.48 +/- 0.03 mg day(-1) at 24 months (NS between the different time points). There was no difference in the dose of rhGH at 12 and 24 months between the two groups. Side-effects were generally minor and consisted of local tissue reactions.


CONCLUSIONS
Administration of rhGH by needle-free, transdermal injection is effective in maintaining IGF-I concentrations in the normal range for age in adults with GHD, and is as effective as traditional subcutaneous injection of rhGH.
Pereira
Alberto M
AM
Department of Endocrinology and Metabolic Diseases, Leiden University Medical Centre, the Netherlands. a.m.pereira@lumc.nl
van der Klaauw
Agatha A
AA
Koppeschaar
Hans P F
HP
Smit
Jan W A
JW
van Thiel
Sjoerd W
SW
van Doorn
Jaap
J
Biermasz
Nienke R
NR
Roelfsema
Ferdinand
F
Romijn
Johannes A
JA
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004334:Drug Administration Schedule; D005260:Female; D019382:Human Growth Hormone / Q000008:administration & dosage* / Q000009:adverse effects / Q000172:deficiency; D006801:Humans; D007279:Injections, Subcutaneous; D007334:Insulin-Like Growth Factor I / Q000032:analysis; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011994:Recombinant Proteins / Q000008:administration & dosage* / Q000009:adverse effects; D016896:Treatment Outcome
D011994:Recombinant Proteins; D019382:Human Growth Hormone; D007334:Insulin-Like Growth Factor I