title: Immune response in Helicobacter pylori-induced low-grade gastric-mucosa-associated lymphoid tissue (MALT) lymphoma.
abstract: We have reported previously that heat-shock protein 60 kDa (hsp60) of Helicobacter pylori is an important antigen in the pathogenesis of gastric mucosa-associated lymphoid tissue (MALT) lymphoma. In order to investigate associations with host immune reactions and hsp60 antigen, CD40 ligand (CD40L) expression and cytokine production were analysed following stimulation with hsp60. To provide a clear antigen-driven immune response, peripheral blood mononuclear cells (PBMC) from patients with low-grade MALT lymphoma and gastritis and those from healthy volunteers were stimulated with recombinant H. pylori hsp60 and H. pylori cell lysate in the presence of cytokines (IL4 and granulocyte-macrophage colony-stimulating factor). mRNA expression was also analysed by a cDNA microarray containing 1100 genes. Expression of CD40L on PBMCs of patients with MALT lymphoma was increased by cytokines or by combination with stimulation with hsp60 antigens. The production of IL4 in PBMC cultures was increased in patients with MALT lymphoma; however, production of IFN-gamma was at low levels. DNA microarray analysis indicated increased levels of HLA-DR and integrin mRNAs. In cases of low-grade MALT lymphoma, adaptive immune responses against hsp60 may be enhanced by host factors, such as antigen presentation and T-cell activation, resulting in B-cell proliferation, which can be demonstrated during chronic H. pylori infection.
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Yamasaki
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Yokota
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Okada
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Shyunji
authors.initials: S
authors.lastname: Hayashi
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Motowo
authors.initials: M
authors.lastname: Mizuno
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Yoshino
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Hirai
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Daizou
authors.initials: D
authors.lastname: Saitou
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Tadaatsu
authors.initials: T
authors.lastname: Akagi
authors.affiliation: Departments of Pathology1, Bacteriology2 and Medicine and Medical Science3, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8558, Japan 4Department of Infection and Immunity, Jichi Medical School, 3311-1 Yakushiji, Minami-kawauchi, Tochigi 326-0498, Japan 5National Cancer Center, Central Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Oguma
mesh_terms: D000328:Adult; D000368:Aged; D000595:Amino Acid Sequence; D000942:Antigens, Bacterial / Q000235:genetics / Q000276:immunology*; D023201:CD40 Ligand / Q000096:biosynthesis; D018834:Chaperonin 60 / Q000235:genetics / Q000276:immunology*; D016207:Cytokines / Q000276:immunology; D005756:Gastritis / Q000276:immunology / Q000382:microbiology; D015972:Gene Expression Regulation, Neoplastic / Q000276:immunology; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000276:immunology; D016481:Helicobacter Infections / Q000150:complications / Q000276:immunology*; D016480:Helicobacter pylori / Q000235:genetics / Q000276:immunology* / Q000502:physiology; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D007963:Leukocytes, Mononuclear / Q000276:immunology; D008024:Ligands; D008213:Lymphocyte Activation; D018442:Lymphoma, B-Cell, Marginal Zone / Q000276:immunology* / Q000382:microbiology; D008875:Middle Aged; D008969:Molecular Sequence Data; D020411:Oligonucleotide Array Sequence Analysis; D012333:RNA, Messenger / Q000096:biosynthesis; D011994:Recombinant Proteins / Q000276:immunology
chemical_list: D000942:Antigens, Bacterial; D018834:Chaperonin 60; D016207:Cytokines; D008024:Ligands; D012333:RNA, Messenger; D011994:Recombinant Proteins; D023201:CD40 Ligand; D015847:Interleukin-4; D007371:Interferon-gamma; D016178:Granulocyte-Macrophage Colony-Stimulating Factor