A new model of pre-B acute lymphoblastic leukemia chemically induced in rats.
2005
Bernard, Natacha | Devevey, Lionel | Jacquemont, Céline | Chrétien, Pascale | Helissey, Philippe | Guillosson, Jean-Jacques | Arock, Michel | Nafziger, Joëlle | Université Pierre et Marie Curie - Paris 6 (UPMC) | Unité sous contrat biologie environnementale ; Institut National de la Recherche Agronomique (INRA)-Université de Franche-Comté (UFC) ; Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC) | Epidémiologie, santé publique et développement ; Université Bordeaux Segalen - Bordeaux 2-Institut National de la Santé et de la Recherche Médicale (INSERM) | Service de médecine interne ; Centre Hospitalier Universitaire de Bordeaux (CHU Bordeaux)-Hôpital Saint-André | Laboratoire de génie électrique de Paris (LGEP) ; Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS) | Laboratoire de Biologie et de Pharmacologie Appliquée (LBPA) ; École normale supérieure - Cachan (ENS Cachan)-Centre National de la Recherche Scientifique (CNRS)
OBJECTIVE: Although B acute lymphoblastic leukemia (B-ALL) is the most common leukemia among children, no chemically inducible model of this leukemia has yet been described in vivo. METHODS: Leukemia was chemically induced in male WKAH/Hkm rats by a nitrosourea derivative, N-butylnitrosourea (BNU), an alkylating agent, administered orally 5 days a week for 24 weeks. Development of leukemia was monitored by clinical observation, follow-up of blood parameters, and appearance of blast cells in peripheral blood samples. The phenotype of the leukemia was determined by cytological examination, cytochemical reactions, and by immunophenotyping of bone marrow cells using various markers. The feasibility of leukemia transplantation was investigated. Clonality and karyotype analyses were also performed. RESULTS: We observed the appearance of acute leukemia in 60% of the rats treated with BNU. Of these, 65% developed pre-B-ALL, which was serially transplantable to healthy WKAH/Hkm male rats. Karyotype analysis did not reveal clonal abnormalities. Clonality determined by immunoglobulin gene rearrangement sequencing disclosed that the pre-B-ALL were mostly oligoclonal. CONCLUSION: This new in vivo model of inducible pre-B-ALL might be useful for investigating the effects of co-initiating or promoting agents suspected to be involved in leukemia development, and for disclosing new molecular events leading to leukemogenic processes.
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Эту запись предоставил Institut national de la recherche agronomique