title: [Expression of beta 1 integrins in normal B lymphocytes at different stages of development and in B cell neoplasias].
abstract: VLA-1 to -6 are cell surface molecules binding to matrix molecules such as collagen, fibronectin, epiligrin, and laminin. In addition, VLA-4 binds to VCAM-1 and ICAM-2, thus mediating intercellular adhesion prerogative for lymphocyte extravasation or "homing". Using frozen tissue of normal lymphoid organs and of 100 morphologically and immunologically typed B cell neoplasias, monoclonal antibodies to all six VLA-alpha subunits and to the common beta 1-chain were applied to serial sections. VLAs were found differentially expressed in cytologically and microtopographically defined B cell subsets [follicular mantle zone cells (MZ), follicular center cells (FC), extrafollicular cells (EF), and plasma cells (PC)] of normal spleen, lymph node, and thymic medulla (which contains an EF compartment). Thus, these cell types, which correspond to discrete stages of B cell development, can also be defined by their VLA status. Acute B lymphoblastic leukemia (ALL) was VLA-1-, 2-, 3 +/-, 4 +/-, 5 +/-, 6-. The VLA-1-, -2 +/-, -3+, -4+, -5+, -6- phenotype of chronic B lymphocytic leukemia (CLL) resembled that of MZ. Hairy cell leukemia (HCL) differed from CLL in its tendency to lack VLA-2, in its consistent lack of VLA-3, and altogether resembled splenic EF in its VLA profile. Mantle zone lymphoma (MZL) consistently expressed VLA-3 and -4 and frequently VLA-5. Nodal follicular center cell lymphomas (FCCL) were VLA-1- and -2- and very rarely expressed VLA-5 and -6. Thus, FCCL although roughly corresponding to FC, tended to aberrantly express VLA-3 and/or VLA-4. Burkitt's lymphoma resembled FCCL but expressed VLA-4 more frequently and at higher levels.(ABSTRACT TRUNCATED AT 250 WORDS)
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology*; D002051:Burkitt Lymphoma / Q000276:immunology*; D006801:Humans; D039001:Integrin alpha Chains; D016023:Integrins / Q000032:analysis*; D015448:Leukemia, B-Cell / Q000276:immunology*; D007943:Leukemia, Hairy Cell / Q000276:immunology; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000276:immunology; D008223:Lymphoma / Q000276:immunology*; D016393:Lymphoma, B-Cell / Q000276:immunology*; D008224:Lymphoma, Follicular / Q000276:immunology; D010954:Plasmacytoma / Q000276:immunology; D016029:Receptors, Very Late Antigen / Q000032:analysis*; D012016:Reference Values; D013154:Spleen / Q000276:immunology
chemical_list: C063493:CDw49d; D039001:Integrin alpha Chains; D016023:Integrins; D016029:Receptors, Very Late Antigen
vernacular_title: Expression von beta 1-Integrinen in normalen B-lymphozytären Differenzierungsformen und in B-Zell-Neoplasien.