- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico NCT00340522
Childhood Cancer and Plexiform Neurofibroma Tissue Microarray for Molecular Target Screening and Clinical Drug Development
This study will construct tissue microarrays (TMAs) pertaining to childhood cancer. TMA technology is a recently developed one that allows for evaluating hundreds of tissue samples simultaneously on the DNA, RNA, and protein levels. The goal is to identify a potential molecular signature. Cancer drug discovery is currently focused on identifying drugs targeted at the molecular level. Such drugs would be more selective and specific for proteins and signaling pathways that are directly involved in the origin of tumors. However, the origin of cancer among adults differs from that of cancer diagnosed in children. The overall approach by the pharmaceutical industry in developing drugs is not likely to be aimed at low-incidence cancers, such as childhood cancers. Thus, the researchers in this study propose to create a childhood cancer TMA that include specimens from a wide range of solid tumors that present a poor prognosis for patients. This TMA would in turn be used to identify antibodies and lead to developing molecularly targeted drugs that would reach clinical trials in adults.
TMAs are created robotically. Small tissue cores are taken from paraffin-embedded tissue blocks and are implanted into new paraffin blocks. The recipient blocks are then processed to produce several hundred specimens that can be evaluated on a single glass slide. Specimens representing 17 distinct kinds of pediatric solid tumors will be used in this study. Also included will be samples of plexiform neurofibroma-that is, benign growths of nervous and connective tissues.
Tissue specimens will come from patients who were age 25 or younger at the time of diagnosis of their cancer or plexiform neurofibroma. No procedures will be performed for the sole purpose of obtaining tissue for this study.
The TMA developed in this study will not be commercialized. The results for individuals whose tumor specimens are used in the array will not be sent to patients or their treating physicians.
Visão geral do estudo
Status
Condições
Descrição detalhada
Background: Cancer drug discovery is now focused on identifying molecularly targeted drugs that are more selective and specific for proteins and signaling pathways that are directly involved in tumorigenesis. This new paradigm alters the approach to clinical drug development for childhood cancers because the emphasis is on therapeutic targets present in common epithelially-derived adult cancers, which have a different pathogenesis. The pharmaceutical industry is unlikely to undertake target discovery programs for low incidence cancers, such as childhood cancers. Therefore, a more pragmatic approach to the development of molecularly targeted drugs in children is required.
Objective: Construct a childhood cancer tissue microarrays (TMA) for screening and selecting the most appropriate molecularly targeted agents for clinical development in childhood cancers.
Eligibility: Ten to twenty representative specimens (paraffin blocks) for each of 25 histologically distinct pediatric solid tumors or plexiform neurofibromas will be collected.
Design: Using a robotic arrayer, three 0.6 mm cores from each tissue block will be donated into one of 3 recipient paraffin TMA blocks (CNS tumors, sarcomas, embryonal tumors). Standard immunohistochemical techniques will be applied to 5 micro m sections from the TMA block using validated antibodies directed against specific protein targets of interest. If greater than 8 to 20 tumors from each specific histological type of cancer are positive, there is a 95% probability that the true proportion of positive specimens exceeds 20%. The results of the TMA target assessment will guide in the selection of molecularly targeted drugs for pediatric phase I clinical trials in the POB and Pediatric Phase I/Pilot Consortium and the selection of candidate tumors for activity testing in phase II clinical trials. If clinical responses are observed in phase I or II trials in tumor types that express the target on the TMA, we will return to the original paraffin blocks and perform Laser Capture Microdissection and produce reverse-phase lysate protein microarrays to assess the activation state of targeted signaling pathways and investigate the role of the target protein in tumorigenesis of the responsive childhood cancers.
Tipo de estudo
Inscrição (Antecipado)
Contactos e Locais
Locais de estudo
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Maryland
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Bethesda, Maryland, Estados Unidos, 20892
- National Cancer Institute (NCI), 9000 Rockville Pike
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Descrição
- INCLUSION CRITERIA:
Twenty representative formalin-fixed, paraffin-embedded specimens for each of 17 histologically distinct pediatric solid tumors will be collected from the pathology departments of selected Pediatric Phase I Consortium collaborators.
Plano de estudo
Como o estudo é projetado?
Colaboradores e Investigadores
Patrocinador
Publicações e links úteis
Publicações Gerais
- Mousses S, Kallioniemi A, Kauraniemi P, Elkahloun A, Kallioniemi OP. Clinical and functional target validation using tissue and cell microarrays. Curr Opin Chem Biol. 2002 Feb;6(1):97-101. doi: 10.1016/s1367-5931(01)00283-6.
- Pollock PM, Harper UL, Hansen KS, Yudt LM, Stark M, Robbins CM, Moses TY, Hostetter G, Wagner U, Kakareka J, Salem G, Pohida T, Heenan P, Duray P, Kallioniemi O, Hayward NK, Trent JM, Meltzer PS. High frequency of BRAF mutations in nevi. Nat Genet. 2003 Jan;33(1):19-20. doi: 10.1038/ng1054. Epub 2002 Nov 25.
- Weeraratna AT, Becker D, Carr KM, Duray PH, Rosenblatt KP, Yang S, Chen Y, Bittner M, Strausberg RL, Riggins GJ, Wagner U, Kallioniemi OP, Trent JM, Morin PJ, Meltzer PS. Generation and analysis of melanoma SAGE libraries: SAGE advice on the melanoma transcriptome. Oncogene. 2004 Mar 18;23(12):2264-74. doi: 10.1038/sj.onc.1207337.
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo
Conclusão do estudo
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Estimativa)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
- Doenças do Sistema Nervoso
- Neoplasias por Tipo Histológico
- Neoplasias
- Doenças Genéticas, Congênitas
- Doenças Neuromusculares
- Doenças Neurodegenerativas
- Neoplasias, Tecido Nervoso
- Doenças do Sistema Nervoso Periférico
- Neoplasias do Sistema Nervoso
- Distúrbios Heredodegenerativos, Sistema Nervoso
- Síndromes Neoplásicas Hereditárias
- Neoplasias da Bainha Nervosa
- Síndromes Neurocutâneas
- Neoplasias do Sistema Nervoso Periférico
- Neurofibromatoses
- Neurofibroma
- Neurofibroma Plexiforme
Outros números de identificação do estudo
- 999904282
- 04-C-N282
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