title: Expression profiling reveals specific gene expression signatures in gastric MALT lymphomas.
abstract: The purpose of this study is to identify genes that are involved in the etiology of Helicobacter pylori induced gastric MALT lymphoma. We compared gene expression profiles of gastric MALT lymphoma with their corresponding gastric MALT (chronic gastritis with formation of follicles and aggregates). cDNA microarrays were used to compare these two tissue types from the same patient (n = 21). Quantitative PCR and immunohistochemical staining were performed to validate the microarray results. Three hundred and fifty eight out of 11,552 genes were differentially expressed between gastric MALT lymphomas and gastric MALT. Thirty eight genes are implicated in immune response, 66 in signal transduction and 36 in cell proliferation. Interestingly, chromosome 6 was the only chromosome which was significantly over-represented with 25 genes (EASE score p = 0.01254). Several surface markers of haematopoietic cells, such as CD1c, CD40, CD44, CD53, CD83, CD86 and members of the HLA-D family were up-regulated in lymphoma tissues, indicating antigen-dependent survival of lymphoma cells. We conclude that gastric MALT lymphoma shows a specific gene expression profile, which allows the differentiation from H. pylori induced lymphoid gastritis.
authors.affiliation: Department of Hematology, Oncology and Immunology, University Hospital, Marburg, Germany.
authors.forename: Minh Quang
authors.initials: MQ
authors.lastname: Huynh
authors.forename: Hans-Heinrich
authors.initials: HH
authors.lastname: Wacker
authors.forename: Thomas
authors.initials: T
authors.lastname: Wündisch
authors.forename: Kristina
authors.initials: K
authors.lastname: Sohlbach
authors.forename: Theo Daniel
authors.initials: TD
authors.lastname: Kim
authors.forename: Michael
authors.initials: M
authors.lastname: Krause
authors.forename: Kathleen
authors.initials: K
authors.lastname: Stabla
authors.forename: Petra
authors.initials: P
authors.lastname: Roth
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Fischbach
authors.forename: Manfred
authors.initials: M
authors.lastname: Stolte
authors.forename: Andreas
authors.initials: A
authors.lastname: Neubauer
mesh_terms: D015703:Antigens, CD / Q000235:genetics; D049109:Cell Proliferation; D002896:Chromosomes, Human, Pair 6; D005756:Gastritis / Q000175:diagnosis; D020869:Gene Expression Profiling; D016480:Helicobacter pylori; D006801:Humans; D007109:Immunity / Q000235:genetics; D018442:Lymphoma, B-Cell, Marginal Zone / Q000175:diagnosis / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D015398:Signal Transduction / Q000235:genetics; D013274:Stomach Neoplasms
chemical_list: D015703:Antigens, CD