title: Characterization of inflammatory cells in oral paracoccidioidomycosis.
abstract: Paracoccidioidomycosis (Pmycosis) is one of the most common deep mycoses in many regions of Latin America, particularly in Brazil. Microscopically, it shows granulomatous inflammatory reaction with giant cells, macrophages, lymphocytes, plasma cells, polymorphonuclear neutrophilic leukocytes, and eosinophils. The purpose of this study was to assess the distribution of inflammatory cells in oral Pmycosis. Fifteen cases of oral Pmycosis were studied by immunohistochemistry for the presence of macrophages, CD4(+) and CD8(+) lymphocytes, CD20(+), CD15(+), and S100(+) cells. Macrophages were the main cells in well-organized granulomas and non-granulomatous areas. The CD4 phenotype was predominant in well-organized granulomas and a balance between CD4(+) and CD8(+) cells was observed in non-granulomatous areas. Dendritic, S100(+) cells were found mainly in the epithelium, in subepithelial connective tissue, and at the periphery of organized granulomas. CD15(+) cells were concentrated mainly in areas of intraepithelial microabscess and ulceration. Macrophages and T cells are the predominant cells in oral Pmycosis. Well-organized granulomas contain fewer yeast particles, indicating a more effective host immune response. Better understanding of the histopathological changes in oral Pmycosis might help determine treatment, severity and systemic involvement of the disease.
authors.affiliation: Department of Oral Pathology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil. eska_02@yahoo.com.br
authors.forename: E
authors.initials: E
authors.lastname: Kaminagakura
authors.forename: P R F
authors.initials: PR
authors.lastname: Bonan
authors.forename: J
authors.initials: J
authors.lastname: Jorge
authors.forename: O P
authors.initials: OP
authors.lastname: Almeida
authors.forename: C
authors.initials: C
authors.lastname: Scully
mesh_terms: D000038:Abscess / Q000382:microbiology; D000328:Adult; D018951:Antigens, CD20 / Q000032:analysis; D001402:B-Lymphocytes / Q000473:pathology; D015496:CD4-Positive T-Lymphocytes / Q000473:pathology; D018414:CD8-Positive T-Lymphocytes / Q000473:pathology; D003713:Dendritic Cells / Q000473:pathology; D004848:Epithelium / Q000382:microbiology; D015726:Giant Cells / Q000473:pathology*; D006098:Granulocytes / Q000473:pathology; D006099:Granuloma / Q000382:microbiology; D006801:Humans; D007249:Inflammation / Q000473:pathology; D007962:Leukocytes / Q000473:pathology*; D016256:Lewis X Antigen / Q000032:analysis; D008264:Macrophages / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009059:Mouth Diseases / Q000382:microbiology* / Q000473:pathology; D019226:Oral Ulcer / Q000382:microbiology; D010229:Paracoccidioidomycosis / Q000473:pathology*; D010586:Phagocytes / Q000473:pathology*; D009418:S100 Proteins / Q000032:analysis
chemical_list: D018951:Antigens, CD20; D016256:Lewis X Antigen; D009418:S100 Proteins