title: Molecular analysis of lymphoid malignancies.
abstract: Although lymphoid malignancies have been widely studied at the molecular level, no group has reported on the simultaneous investigation of t(14;18) chromosomal translocation, B-cell clonality and bcl2 gene expression. We have performed PCR analysis of t(14;18) translocation and B-cell clonality as well as semi-quantitation of bcl2 expression by Western blotting on a group of 41 patients treated at our institution for lymphoid malignancies. The t(14;18) translocation was observed in 10 out of 40 cases (25%) with a prevalence in the subgroup of centrofollicular lymphoma (9 out of 19, or 47%, which includes one patient in complete clinical remission). bcl2 was overexpressed in 84% of the patients (21/25) and B monoclonality was observed in 21 out of 37 B-cell neoplasia patients (57%) with or without a t(14;18) translocation. In 4 patients, bcl2 overexpression, which has been implicated in the sensitivity to a variety of cytotoxic drugs, was the only abnormality detected. Studies are currently underway to determine whether semi-quantitation of bcl2 expression provides improved prediction of a patient's response to chemotherapy.
authors: HOP PAUL BROUSSE,SERV BIOCHIM,F-94804 VILLEJUIF,FRANCE. HOP PAUL BROUSSE,SERV MALAD SANGUINES IMMUNITAIRES & TUMORALES,F-94804 VILLEJUIF,FRANCE.
authors: N
authors: N
authors: Frenoy
authors: M
authors: M
authors: Gildelgado
authors: P
authors: P
authors: Pham
authors: M
authors: M
authors: Salvucci
authors: A
authors: A
authors: Chahine
authors: A
authors: A
authors: Chabli
authors: J
authors: J
authors: Misset
authors: B
authors: B
authors: Debuire