title: Overexpression of the VAV proto-oncogene product is associated with B-cell chronic lymphocytic leukaemia displaying loss on 13q.
abstract: The expression of the VAV proto-oncogene in 57 patients with chronic myeloproliferative disease (CMD), B-cell acute lymphoblastic leukaemia (B-ALL) and B-cell non-Hodgkin Lymphoma (B-NHL), and 61 with B-cell chronic lymphocytic leukaemia (B-CLL) was analysed. VAV overexpression was observed in 19.5% of cases and 81% of VAV-positive tumours also displayed VAV phosphorylation. Overexpression was not observed in B-ALL or CMD, but 13% of B-NHL and 34.4% of B-CLL patients (P = 0.002) overexpressed VAV. The overexpression and phosphorylation of VAV was detected more frequently in 13q- chronic lymphocytic leukaemias (71.4%) versus other B-CLLs (23.4%, P = 0.001). Overexpression of VAV protein is a frequent event in patients with B-CLL displaying loss of 13q sequences.
authors.affiliation: Centro de Investigación del Cáncer, Hospital Clínico Universitario de Salamanca, Salamanca, Spain.
authors.forename: Rosario M
authors.initials: RM
authors.lastname: Prieto-Sánchez
authors.forename: José A
authors.initials: JA
authors.lastname: Hernández
authors.forename: Juan L
authors.initials: JL
authors.lastname: García
authors.forename: Norma C
authors.initials: NC
authors.lastname: Gutiérrez
authors.forename: Jesús
authors.initials: J
authors.lastname: San Miguel
authors.forename: Xosé R
authors.initials: XR
authors.lastname: Bustelo
authors.forename: Jesús M
authors.initials: JM
authors.lastname: Hernández
mesh_terms: D001853:Bone Marrow / Q000378:metabolism; D002051:Burkitt Lymphoma / Q000235:genetics / Q000378:metabolism; D002882:Chromosomes, Human, Pair 13 / Q000235:genetics*; D017353:Gene Deletion; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000235:genetics / Q000378:metabolism*; D016393:Lymphoma, B-Cell / Q000235:genetics / Q000378:metabolism; D010766:Phosphorylation; D000090063:Proto-Oncogene Mas; D051567:Proto-Oncogene Proteins c-vav / Q000378:metabolism*
chemical_list: C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D051567:Proto-Oncogene Proteins c-vav