title: Chronic inflammatory demyelinating polyneuropathy: histological and immunopathological studies on biopsied sural nerves.
abstract: We undertook histological and immunopathological studies on biopsied sural nerves from 9 patients with chronic inflammatory demyelinating polyneuropathy (CIDP). The diagnosis of CIDP was based on the research criteria proposed by the Ad Hoc Subcommittee of the American Academy of Neurology AIDS Task Force. The nerve pathology in these patients comprised macrophage-associated active demyelination and subsequent remyelination of various proportions. The presence of T cells in the endoneurium correlated with activity of demyelination. An analysis of T cell subsets demonstrated that the number of CD8-positive cells predominated over that of CD4-positive ones. Infiltration of B cells, and depositions of immunoglobulin and complement were not seen. These observations suggest that a T cell-mediated process is of pathogenic significance in CIDP. Furthermore, a double immunofluorescence staining revealed that most HLA-DR antigen-positive cells in the nerves in which active demyelination was seen coexpressed a macrophage-specific determinant. Conversely, HLA-DR-positive Schwann cells were found in the nerves in which remyelination was predominant. The expression of HLA-DR antigen on Schwann cells might not play a pathogenic role in the active demyelination in CIDP.
authors.affiliation: Third Department of Internal Medicine, Faculty of Medicine, Kagoshima University, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Matsumuro
authors.forename: S
authors.initials: S
authors.lastname: Izumo
authors.forename: F
authors.initials: F
authors.lastname: Umehara
authors.forename: M
authors.initials: M
authors.lastname: Osame
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002908:Chronic Disease; D003711:Demyelinating Diseases / Q000473:pathology*; D005260:Female; D005455:Fluorescent Antibody Technique; D006684:HLA-DR Antigens / Q000276:immunology; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D007150:Immunohistochemistry; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D013497:Sural Nerve / Q000473:pathology*; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D006684:HLA-DR Antigens; D007136:Immunoglobulins