Objective: To assess growth hormone (GH)/insulin like growth factor-1 (IGF-1) axis as a possible non-nutritional factor for growth retardation in children with cerebral palsy (CP).
Methods:A case-control study was conducted at a tertiary university hospital. Thirty children with CP (seven children with normal growth [CP-N] and 23 with retarded growth [CP-R]), 30 children with protein energy malnutrition (PEM), and 30 healthy children (REF group) underwent an assessment of growth parameters, serum IGF-1, basal GH, and peak GH after stimulation with insulin.Results: PEM patients had higher basal GH levels than CP-N, CP-R and REF groups (p = 0.026, p < 0.001, and p < 0.001 respectively). After insulin stimulation, CP-N, CP-R, and PEM patients had lower GH levels compared to the REF group (p = 0.04, p = 0.007, and p = 0.036 respectively). IGF-1 levels were lower in CP-R group compared to CP-N and REF groups (p = 0.037 and p < 0.001 respectively), and in PEM group compared to CP-N and REF groups (p < 0.001 and p < 0.001 respectively).
Conclusions:CP-R patients failed to demonstrate the same high basal GH response as PEM patients, and responded inadequately to the insulin stimulation test, but they had IGF-1 levels comparable to those of PEM patients. On the other hand, CP-N patients behaved as controls regarding their basal GH and IGF-1 levels, but failed to respond adequately to the insulin stimulation test. The PEM group presented high basal GH and low IGF-1 levels. These findings suggest that nonnutritional factors contribute to growth retardation in CP children.
J Pediatr (Rio J). 2012;88(3):267-74:GH, IGF-1, cerebral palsy, children.
ResumoObjetivo: Avaliar o eixo hormônio de crescimento (GH)/fator de crescimento semelhante à insulina 1 (IGF-1) como possível fator não nutricional para o retardo de crescimento em crianças com paralisia cerebral (PC).
Conclusões:Os pacientes com PC-R não demonstraram a mesma resposta basal elevada do GH apresentada pelos pacientes com DPE, e responderam de forma inadequada ao estímulo com insulina, mas apresentaram níveis de IGF-1 comparáveis aos dos pacientes com DPE. Por outro lado, os pacientes com PC-N tiveram comportamento semelhante ao dos controles com relação aos níveis basais de GH e IGF-1, mas não responderam adequadamente ao estímulo com insulina. O grupo DPE apresentou GH basal elevado e IGF-1 baixo. Esses achados sugerem que fatores não nutricionais contribuem para o retardo de crescimento em crianças com PC. Growth hormone/insulin-like growth factor-1 axis: a possible non-nutritional factor for growth retardation in children with cerebral palsy Não foram declarados conflitos de interesse associados à publicação deste artigo.Como citar este artigo: Hegazi MA, Soliman OE, Hasaneen BM, El-Arman M, El-Galel NA, El-Deek BS. Growth hormone/insulin-like growth factor-1 axis: a possible non-nutritional factor for growth retardation in children with cerebral palsy. J Pediatr (Rio J). 2012;88(3):267-74.Artigo submetido em 27.11.11, aceito em 14.03.12.http://dx