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Damasceno KA, dos Santos-Conceição AM, Silva LP, Cardoso TMDS, Vieira-Filho CHDC, Figuerêdo SHS, Martins-Filho E, de Faria BGO, da Costa-Neto JM, Cassali GD, Estrela-Lima A. Factors related to the suppression of the antitumour immune response in female dogs with inflammatory mammary carcinoma. PLoS One 2022; 17:e0267648. [PMID: 35512031 PMCID: PMC9071162 DOI: 10.1371/journal.pone.0267648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 04/12/2022] [Indexed: 11/25/2022] Open
Abstract
Inflammatory mammary carcinoma (IMC), a neoplasia affecting women and female dogs, is considered an aggressive cancer with high metastatic potential and a low survival rate. Studies focused on the tumour microenvironment indicate that the aggressive behaviour of this tumour is primarily correlated with immunological factors as well as inflammation. The objective of this study was to analyse the possible strategies used by the tumour cells to suppress the immune response in female dogs with IMC. Forty-six female dogs were divided into three groups: control (C, n = 10), IMC (n = 14) and mammary carcinoma (MC, n = 22). Clinical-pathological evaluations, survival at follow-up, immunophenotyping of leukocytes in peripheral blood and tumours, and immunohistochemical evaluation of CD4+, granzyme B, perforin and FAS-L were performed. Clinical and pathological results showed a higher frequency of the primary form of neoplasia, solid arrays of tumor cells and a lower survival rate in the IMC group (30 days). Morphometric analysis of inflammatory infiltrate revealed more lymphocytes and macrophages in the IMC group. Immunophenotyping analysis of peripheral blood revealed a higher frequency of CD8+ T-cells (p = 0.0017), a lower frequency of CD4+ T-cells (p <0.0001), and significantly higher mean MHCI and MHCII CD14+ fluorescence intensity in the IMC group (p = 0.038 and p = 0.0117, respectively). The immunohistochemical evaluation of tumour sections showed fewer FAS-L-positive inflammatory cells in the IMC group. These results suggest the important contribution of CD8+ T-cells, macrophages and FAS-L in the aggressiveness of IMC.
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Affiliation(s)
- Karine Araújo Damasceno
- Laboratory of Experimental Pathology, Gonçalo Moniz Institute, Salvador, Bahia, Brazil
- Research Center on Mammary Oncology NPqOM/HOSPMEV, Federal University of Bahia, Salvador, Bahia, Brazil
- * E-mail: (AE-L); (KAD)
| | - Aline Michelle dos Santos-Conceição
- Research Center on Mammary Oncology NPqOM/HOSPMEV, Federal University of Bahia, Salvador, Bahia, Brazil
- Postgraduate Program in Animal Science in the Tropics, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Laís Pereira Silva
- Research Center on Mammary Oncology NPqOM/HOSPMEV, Federal University of Bahia, Salvador, Bahia, Brazil
- Postgraduate Program in Animal Science in the Tropics, Federal University of Bahia, Salvador, Bahia, Brazil
| | | | | | | | - Emanoel Martins-Filho
- Research Center on Mammary Oncology NPqOM/HOSPMEV, Federal University of Bahia, Salvador, Bahia, Brazil
- Postgraduate Program in Animal Science in the Tropics, Federal University of Bahia, Salvador, Bahia, Brazil
| | | | - João Moreira da Costa-Neto
- Research Center on Mammary Oncology NPqOM/HOSPMEV, Federal University of Bahia, Salvador, Bahia, Brazil
- Postgraduate Program in Animal Science in the Tropics, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Geovanni Dantas Cassali
- Laboratory of Comparative Pathology, Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Alessandra Estrela-Lima
- Research Center on Mammary Oncology NPqOM/HOSPMEV, Federal University of Bahia, Salvador, Bahia, Brazil
- Postgraduate Program in Animal Science in the Tropics, Federal University of Bahia, Salvador, Bahia, Brazil
- * E-mail: (AE-L); (KAD)
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