title: A lymphoproliferative abnormality associated with inappropriate expression of the Thy-1 antigen in transgenic mice.
abstract: The Thy-1 antigen is a cell-surface glycoprotein of unknown function expressed on mouse T lymphocytes, neurons, and hematopoietic stem cells. To alter the normal pattern of Thy-1 expression during hematopoietic differentiation, we created transgenic mice using a hybrid Thy-1 gene containing a transcriptional enhancer of the mouse immunoglobulin heavy chain gene (E mu). Strains of mice bearing the Thy-1.2/E mu gene express the Thy-1.2 antigen on mature B lymphocytes and their progenitors, and develop a heritable lymphoid hyperplasia characterized by massive expression of the Thy-1.2 antigen in the bone marrow and lymph nodes. The phenotype associated with inappropriate developmental regulation of the Thy-1 gene suggests that the Thy-1 antigen may play a role in inducing activation or differentiation events on early lymphocyte progenitor cells.
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000235:genetics* / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology / Q000473:pathology; D001853:Bone Marrow / Q000276:immunology / Q000473:pathology; D002455:Cell Division; D004742:Enhancer Elements, Genetic; D005786:Gene Expression Regulation; D006412:Hematopoietic Stem Cells / Q000276:immunology; D007143:Immunoglobulin Heavy Chains / Q000235:genetics; D008198:Lymph Nodes / Q000276:immunology; D008221:Lymphoid Tissue / Q000276:immunology; D008232:Lymphoproliferative Disorders / Q000235:genetics / Q000276:immunology* / Q000473:pathology; D051379:Mice; D008806:Mice, Inbred AKR; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D012333:RNA, Messenger / Q000235:genetics; D011995:Recombination, Genetic; D018800:Thy-1 Antigens
chemical_list: D000954:Antigens, Surface; D007143:Immunoglobulin Heavy Chains; D012333:RNA, Messenger; D018800:Thy-1 Antigens