Immunohistochemical study of the inflammatory infiltrate associated with feline cutaneous squamous cell carcinomas and precancerous lesions (actinic keratosis)
| Autor: | José Pérez, Sofia Laura Gonzalez, E Mozos, Michael J. Day, M.P Martı́n |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Male
Pathology medicine.medical_specialty Skin Neoplasms CD3 Complex CD3 T-Lymphocytes Immunology Plasma Cells Receptors Antigen B-Cell MHC class II antigen Immunoenzyme Techniques Immune system Antigen Antigens CD medicine Cytotoxic T cell Animals MHC class II B-Lymphocytes General Veterinary biology Actinic keratosis Keratosis medicine.disease Immunoglobulin A Immunoglobulin G biology.protein Carcinoma Squamous Cell Cats Female Infiltration (medical) Precancerous Conditions CD79 Antigens |
| Zdroj: | Veterinary immunology and immunopathology. 69(1) |
| ISSN: | 0165-2427 |
| Popis: | The distribution of T lymphocytes (CD3+), B lymphocytes (CD79+), immunoglobulin-containing plasma cells (IgG, IgM and IgA), macrophages (Mac387+) and MHC Class II antigen was analysed in the inflammatory infiltrate associated with cutaneous squamous cell carcinomas (SCC) from 23 cats. Peri-tumoural skin (12 cases) and precancerous lesions of actinic keratosis (nine cases) were also evaluated for the expression of MHC Class II. The results revealed that an abundant inflammatory infiltrate was associated with the majority of SCC. This infiltrate was composed mainly of CD3+ T lymphocytes, B cells (CD79+) and IgG-bearing plasma cells, and the intensity of infiltration increased with the degree of invasiveness of the tumour. The number of CD3+ T cells and CD79+ cells was significantly increased in well-differentiated SCC compared with moderately differentiated tumours, whereas the number of IgM+, IgA+ plasma cells and Mac387+ macrophages was low or moderate and did not change significantly with histologic grade or invasiveness. MHC Class II antigen was expressed by infiltrating lymphocytes and macrophages, and by fibroblasts. A variable number of neoplastic cells (10% to 80%) in 10 SCC, and keratinocytes of basal layers in seven of nine cases of actinic keratosis also expressed MHC Class II, whereas keratinocytes of normal skin were always negative for this antigen. These results suggest that CD3+ T lymphocytes, CD79+ B cells and IgG-bearing plasma cells may participate in down-regulation of tumour growth, since these cell types were particularly numerous in well-differentiated and mildly invasive SCC, as well as in actinic keratosis. The expression of MHC Class II by neoplastic cells could enhance this local anti-tumour immune response. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect