Long-term GH treatment improves adult height in children with Noonan syndrome with and without mutations in protein tyrosine phosphatase, non-receptor-type 11.
until further notice
SourceEuropean Journal of Endocrinology, 159, 3, (2008), pp. 203-208
Article / Letter to editor
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Epidemiology, Biostatistics & HTA
European Journal of Endocrinology
SubjectIGMD 3: Genomic disorders and inherited multi-system disorders; IGMD 5: Health aging / healthy living; IGMD 6: Hormonal regulation; IGMD 8: Mitochondrial medicine; NCEBP 2: Evaluation of complex medical interventions; UMCN 1.2: Molecular diagnosis, prognosis and monitoring; UMCN 1.5: Interventional oncology; UMCN 5.2: Endocrinology and reproduction
CONTEXT: Noonan syndrome (NS) is characterized by short stature, typical facial dysmorphology and congenital heart defects. Short-term effect of GH therapy in NS is beneficial, reports on the effect on adult height are scarce. OBJECTIVE: To determine the effect of long-term GH therapy in children with NS. DESIGN: Twenty-nine children with NS were treated with GH until final height was reached. SETTING: Hospital endocrinology departments. PATIENTS: Children with the clinical diagnosis of NS, with mean age at the start of therapy of 11.0 years, 22 out of 27 tested children had a mutation in the protein tyrosine phosphatase, non-receptor-type 11 gene (PTPN11 gene). Interventions GH was administered subcutaneously at 0.05 mg/kg per day until growth velocity was 1 cm/6 months. MAIN OUTCOME MEASURE: Linear growth (height) was measured at 3-month intervals in the first year and at 6-month intervals thereafter until final height. RESULTS: At the start of treatment, median height SDS (H-SDS) was -2.8 (-4.1 to -1.8) and 0.0 (-1.4 to +1.2), based on national and Noonan standards respectively. GH therapy lasted for 3.0-10.3 years (median, 6.4), producing mean gains in H-SDS of +1.3 (+0.2 to +2.7) and +1.3 (-0.6 to +2.4), based on national and Noonan standards respectively. In 22 children with a mutation in PTPN11 mean gain in H-SDS for National standards was +1.3, not different from the mean gain in the five children without a mutation in PTPN11+1.3 (P=0.98). CONCLUSION: Long-term GH treatment in NS leads to attainment of adult height within the normal range in most patients.
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