title: Mutation of the 5' noncoding region of the BCL-6 gene in low-grade gastric lymphoma of the mucosa-associated lymphoid tissue.
abstract: BCL-6 gene rearrangement and hypermutations were investigated in four Hong Kong Chinese patients with low-grade gastric lymphoma of the mucosa-associated lymphoid tissue (MALToma). The former was studied by Southern analysis and the latter by the technique of polymerase chain reaction and denaturing gradient gel electrophoresis. BCL-6 gene rearrangement was not detectable in any of the four cases. However, mutations at both the E1.11 and E1.12 segments of the 5' noncoding region of the BCL-6 gene were found in two patients. This preliminary observation suggests that the mutations of the 5' noncoding region of the BCL-6 gene rather than gene rearrangement may be playing a more important role in the tumorigenesis of low-grade gastric MALToma. Further confirmation of this finding by studying a larger number of patients will be required.
authors.affiliation: Department of Medicine, University of Hong Kong, Queen Mary Hospital, People's Republic of China.
authors.forename: R
authors.initials: R
authors.lastname: Liang
authors.forename: W P
authors.initials: WP
authors.lastname: Chan
authors.forename: Y L
authors.initials: YL
authors.lastname: Kwong
authors.forename: A C
authors.initials: AC
authors.lastname: Chan
authors.forename: W S
authors.initials: WS
authors.lastname: Xu
authors.forename: G
authors.initials: G
authors.lastname: Srivastava
mesh_terms: D000368:Aged; D015139:Blotting, Southern; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D015321:Gene Rearrangement; D006801:Humans; D018442:Lymphoma, B-Cell, Marginal Zone / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009154:Mutation; D016133:Polymerase Chain Reaction; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D051560:Proto-Oncogene Proteins c-bcl-6; D013274:Stomach Neoplasms / Q000235:genetics*; D014157:Transcription Factors / Q000235:genetics*
chemical_list: D004268:DNA-Binding Proteins; D011518:Proto-Oncogene Proteins; D051560:Proto-Oncogene Proteins c-bcl-6; D014157:Transcription Factors