Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 1 de 1
Filter
Add filters








Language
Year range
1.
Arq. bras. endocrinol. metab ; 52(8): 1288-1295, Nov. 2008. ilus, tab
Article in English | LILACS | ID: lil-503312

ABSTRACT

We present two acromegalic patients in which clinical and molecular data are discussed in regard to their ability to predict long term octreotide LAR® therapy response. Case reports: Patient 1: female, 36 years old at diagnosis. Basal GH and IGF-I at diagnosis were 133 ng/mL and 181 percent above the upper limit of reference values (ULRV), respectively. Growth hormone during acute test with subcutaneous octreotide decreased from 133 to 13 ng/mL. Patient started on primary octreotide LAR® therapy (20mg q28 days) and achieved biochemical parameters of disease control after 6 months. Molecular analysis of tumor fragments: gsp +; quantitative analysis of SSTR (somatostatin receptor) and DR (dopamine receptor) mRNA - SSTR2 23954; SSTR5 2407; DR2 total 17016 copies. Patient 2: male, 38 years old at diagnosis. Basal GH and IGF-I at diagnosis were 120 ng/mL and 114 percent ULRV, respectively. Patient underwent non-curative trans-sphenoidal surgery. Post-operative GH and IGF-I were 112 ng/mL and 137 percent ULRV, respectively. Growth hormone during acute test with subcutaneous octreotide decreased from 112 to 7 ng/mL. Octreotide LAR® therapy (20 mg q28 days) was then initiated. After 6 months of treatment, patient did not attain biochemical control of disease and displayed increased tumor volume. Molecular analysis of tumor fragments: gsp not done; quantitative analysis of SSTR and DR mRNA - SSTR2 416; SSTR5 3767; DR2 total 3439 copies. In conclusion, these two cases illustrate how laboratory data can be conflicting as predictors of octreotide LAR® responsiveness and how molecular analysis of tumor fragments can help explain different behaviors in clinically similar patients.


Apresentamos dois pacientes acromegálicos nos quais dados clínicos e moleculares são discutidos quanto à sua capacidade de predizer a resposta a longo prazo ao tratamento com octreotide LAR®. Relato dos casos: Paciente 1: Feminina, 36 anos de idade ao diagnóstico. GH e IGF-I ao diagnóstico 133 ng/mL e 181 por cento acima do limite superior do valor de referência (LSVR), respectivamente. GH durante o teste agudo com octreotide subcutâneo diminuiu de 133 para 13 ng/mL. Foi iniciado tratamento primário com octreotide LAR® (20 mg q28 dias) e a paciente alcançou os parâmetros bioquímicos de controle de doença depois de seis meses. Análise molecular do tumor: gsp +; análise quantitativa do mRNA de SSTR (receptores de somatostatina) e DR (receptor de dopamina) - SSTR2 23.954; SSTR5 2.407; DR2 total 17.016 cópias. Paciente 2: Masculino, 38 anos de idade ao diagnóstico. GH e IGF-I ao diagnóstico 120 ng/mL e 114 por cento LSVR, respectivamente. Paciente foi submetido à cirurgia trans-esfenoidal não-curativa. GH e IGF-I pós-operatórios 112 ng/mL e 137 por cento LSVR, respectivamente. GH durante o teste agudo diminuiu de 112 para 7 ng/mL. Foi iniciado tratamento com octreotide LAR® (20 mg q28 dias). Após seis meses o paciente não alcançou controle bioquímico e apresentou aumento do volume tumoral. Análise molecular do tumor: gsp não estudado; análise quantitativa do mRNA de SSTR e DR - SSTR2 416; SSTR5 3.767; DR2 total 3.439 cópias. Em conclusão, estes dois casos ilustram como dados laboratoriais podem ser conflitantes enquanto preditores de resposta ao tratamento com octreotide LAR® e como a análise molecular de fragmentos do tumor pode ajudar a explicar comportamentos diferentes em pacientes clinicamente semelhantes.


Subject(s)
Adult , Female , Humans , Male , Acromegaly/metabolism , Adenoma/drug therapy , Octreotide/therapeutic use , /genetics , Receptors, Somatostatin/genetics , Acromegaly/drug therapy , Adenoma/pathology , Antineoplastic Agents, Hormonal/therapeutic use , Gene Expression , Oncogenes/drug effects , Oncogenes/genetics , Pituitary Neoplasms/drug therapy , Pituitary Neoplasms/pathology , RNA, Messenger/metabolism
SELECTION OF CITATIONS
SEARCH DETAIL