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1.
Indian J Hum Genet ; 2011 Sept; 17(3): 218-225
Article in English | IMSEAR | ID: sea-138966

ABSTRACT

BACKGROUND: Multiple factors affect the growth response to recombinant human growth hormone (rhGH) in children with idiopathic short stature (ISS). AIM: To evaluate the growth responses of children with ISS treated with rhGH, aiming to identify the predictors of growth response. MATERIALS AND METHODS: We studied 120 cases, 90 males (75%), with a mean age of 13.8±2.7 years and 30 females (25%), with a mean age of 12.3±2.5 years. All patients received rhGH with a standard dose of 20 IU/m2/week. The calculated dose per week was divided into six days and given subcutaneous at night. RESULTS: A significant positive trend was detected in the delta changes of all anthropometric data. For the first year, the growth response was positively correlated to CA and BA delay and negatively correlated to height, weight and IGF-1 SDSs. For the second year, the growth response was correlated positively to first year growth velocity, BA, triceps skin fold thickness SDS and deviation from target height, and negatively correlated to weight, IGFBP3 SDS and target height SDS. For the third year, the growth response was positively correlated to five variables namely target height, 2nd year growth velocity, IGF-1 SDS, weight SDS and triceps skin fold thickness SDS. For the fourth year, growth response was positively correlated to 2nd and 3rd year growth velocity, BA, deviation from target height and weight/ height SDS. CONCLUSION: Our study showed multiplicity of predictors that is responsible for response in ISS children treated with rhGH, and BA was an important predictor.


Subject(s)
Adolescent , Age Determination by Skeleton , Body Height/drug effects , Female , Child , Dwarfism/drug therapy , Dwarfism/metabolism , Growth Disorders/drug therapy , Human Growth Hormone/administration & dosage , Human Growth Hormone/pharmacology , Humans , Male , Puberty/drug effects , Skin/cytology
2.
Article in English | LILACS | ID: lil-357863

ABSTRACT

Nos últimos 20 anos, após o tratamento de pacientes portadores de leucemia linfoblástica aguda, com quimioterapia e radioterapia, houve melhora na taxa de sobrevivência e cura em torno de 70 por cento. Crianças portadoras da doença foram envolvidas em protocolos de tratamento internacionais que visavam melhorar a sobrevida e minimizar os graves e irreversíveis efeitos tardios. A nossa unidade utiliza o protocolo internacional GBTLI LLA-85 e 90, com as drogas metrotexate, citosina, arabinoside, dexametasona e radioterapia .Entretanto, estes tratamentos podem causar insuficiências gonadais e prejuízo no crescimento. PACIENTES E MÉTODO: Os autores analisaram 20 crianças fora de terapia a fim de determinar o papel das várias doses de radioterapia sobre alterações endocrinológicas. Foram divididos em três grupos baseados na profilaxia do sistema nervoso central: o grupo A foi submetido à quimioterapia, o grupo B à quimioterapia mias radioterapia (18Gy) e o grupo C à quimioterapia mais radioterapia (24 Gy). Foram avaliadas as concentrações séricas de LH, FSH, GH e testosterona. Os estudos de imagem incluiram idade óssea, ultrassonografia pélvica, escrotal e ressonância nuclear magnética do crânio. RESULTADOS: Houve diferenças significativas nas respostas do hormônio de crescimento e prejuízo na estatura final (Bayley-Pinneau) entre os dois grupos irradiados e o grupo que não foi irradiado, mas não houve diferenças quando se compararam as doses de radiação utilizadas (18 ou 24 Gy). A previsão da altura final (Bayley-Pinneau) foi menor (p= 0,0071) nos dois grupos tratados com radioterapia. Duas meninas apresentaram puberdade precoce e um menino teve atraso puberal associado a calcificação do epidídimo. CONCLUSÃO: A radioterapia é responsável por efeitos colaterais especialmente quanto ao crescimento e puberdade.


Subject(s)
Adolescent , Child , Female , Humans , Male , Growth , Puberty , Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy , Precursor Cell Lymphoblastic Leukemia-Lymphoma/radiotherapy , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Body Height/drug effects , Body Height/radiation effects , Endocrine Glands/drug effects , Endocrine Glands/radiation effects , Growth/drug effects , Growth/radiation effects , Puberty/drug effects , Puberty/radiation effects , Radiotherapy Dosage , Radiotherapy/adverse effects
3.
Rev. Assoc. Med. Bras. (1992) ; 44(3): 214-7, jul.-set. 1998. tab
Article in Portuguese | LILACS | ID: lil-215340

ABSTRACT

Objetivo. Com o objetivo de avaliar o desenvolvimento puberal após o tratamento de leucemia linfóide aguda (LLA) na infância, foi realizado um estudo retrospectivo, em meninas tratadas de janeiro de 1980 a janeiro de 1991, no Centro de Investigaçoes Hematológicas "Dr. Domingos A. Boldrini", em Campinas-SP. Casuística e Método. Foram selecionadas 42 meninas, tratadas antes da puberdade com quimioterapia sistêmica e intratecal e radioterapia cranial, utilizando doses de 18 a 24 Grays (Gy). Resultados. As idades médias da telarca, pubarca e menarca foram inferiores às do grupo-controle, embora com significância estatística apenas para a idade da telarca. Nao houve diferenças entre os grupos tratados com 18 ou 24Gy. As meninas tratadas antes dos cinco anos de idade apresentaram idade média da menarca estatisticamente inferior àquelas tratadas após cinco anos e em relaçao ao grupo-controle. Conclusao. Os resultados mostraram que o desenvolvimento puberbal em meninas tratadas de LLA na infância foi mais precoce que o de mininas saudáveis.


Subject(s)
Child, Preschool , Child , Female , Humans , Adolescent , Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy , Precursor Cell Lymphoblastic Leukemia-Lymphoma/radiotherapy , Puberty/drug effects , Puberty/radiation effects , Age Factors , Linear Models , Retrospective Studies
4.
Braz. j. med. biol. res ; 25(11): 1117-26, 1992. ilus, tab
Article in English | LILACS | ID: lil-134608

ABSTRACT

1. The role of testosterone (T) in growth was evaluated in 11 prepubertal hypopituitary males during two 15-day periods separated by a 4-week interval, i.e., before (PRE-T period) and during T ester treatment (50 mg every 5 days, 3 im doses-T period). 2. T increased growth hormone (GH) secretion, assessed by 4-h rhythm (mean +/- SEM = 1.90 +/- 0.27 vs 1.77 +/- 0.21 ng/ml; P < 0.05) and after a GHRH stimulus (3.42 +/- 0.54 vs 3.08 +/- 0.43 ng/ml; P < 0.05) as compared to the PRE-T period. 3. T also increased basal somatomedin-C (SM-C) levels (0.20 +/- 0.03 vs 0.15 +/- 0.02 U/ml; P < 0.001) and SM-C generation. After GH was administered in 4 im doses (0.01, 0.02, 0.05 and 0.1 U/kg), SM-C levels were 0.31 +/- 0.08 vs 0.24 +/- 0.07 U/ml, P < 0.001. T did not change incremental (absolute minus basal) SM-C levels (0.15 +/- 0.08 vs 0.12 +/- 0.07 U/ml; P > 0.05). 4. The results suggest that T increased plasma SM-C levels by stimulating residual GH secretion in hypopituitary males


Subject(s)
Humans , Male , Insulin-Like Growth Factor I/drug effects , Puberty/drug effects , Growth Hormone/deficiency , Growth Hormone/drug effects , Growth Hormone , Testosterone/therapeutic use , Adolescent , Adult , Analysis of Variance , Child , Hypopituitarism/blood , Hypopituitarism/drug therapy , Hypopituitarism/epidemiology , Insulin-Like Growth Factor I/analysis , Puberty/blood , Growth Hormone/blood , Time Factors
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