title: Quantitative microsatellite analysis to delineate the commonly deleted region 1p22.3 in mantle cell lymphomas.
abstract: The molecular pathogenesis of mantle cell lymphomas (MCL), a subset of B-cell non-Hodgkin's lymphomas with a poor prognosis, is still poorly understood. In addition to the characteristic primary genetic alteration t(11;14)(q13;q32), several further genetic changes are present in most cases. One of the most frequent genomic imbalances is the deletion of 1p22.1-p31.1 observed in nearly one-third of MCL cases. This might indicate the presence of tumor suppressor gene(s) in this critical region of deletion. Quantitative microsatellite analysis (QuMA) is a real-time PCR-based method to detect DNA copy number changes. Since QuMA has the resolving power to detect subtle genomic alterations, including homozygous deletions, this may help to identify candidate tumor suppressor genes from deleted regions. To gain more insight into the molecular pathogenesis of MCL, QuMA was performed on genomic DNA from 57 MCL cases. Eight microsatellite loci mapping to the chromosomal region 1p22.3 were analyzed. Losses were observed in 51 of the 57 ( approximately 89.5%) samples. Two cases showed a homozygous deletion at the locus containing the gene SH3GLB1, which plays a key role in Bax-mediated apoptosis. Two hotspots with copy number losses were detected at chromosomal localizations 85.4 and 86.6 Mb encompassing BCL10 and CLCA2. Both the genes seem to be attractive candidates to study tumor suppressor function in MCL.
authors.affiliation: Institute of Cell and Molecular Pathology, Hannover Medical School, Hannover, Germany.
authors.forename: Asha
authors.initials: A
authors.lastname: Balakrishnan
authors.forename: Nils
authors.initials: N
authors.lastname: von Neuhoff
authors.forename: Cornelia
authors.initials: C
authors.lastname: Rudolph
authors.forename: Kathrin
authors.initials: K
authors.lastname: Kamphues
authors.forename: Margit
authors.initials: M
authors.lastname: Schraders
authors.forename: Patricia
authors.initials: P
authors.lastname: Groenen
authors.forename: Johan H J M
authors.initials: JH
authors.lastname: van Krieken
authors.forename: Evelyne
authors.initials: E
authors.lastname: Callet-Bauchu
authors.forename: Brigitte
authors.initials: B
authors.lastname: Schlegelberger
authors.forename: Doris
authors.initials: D
authors.lastname: Steinemann
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002872:Chromosome Deletion; D002874:Chromosome Mapping; D002878:Chromosomes, Human, Pair 1 / Q000235:genetics*; D004273:DNA, Neoplasm / Q000235:genetics; D005260:Female; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D020522:Lymphoma, Mantle-Cell / Q000235:genetics*; D008297:Male; D018895:Microsatellite Repeats; D008875:Middle Aged; D016133:Polymerase Chain Reaction
chemical_list: D004273:DNA, Neoplasm