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DOI: 10.1055/s-0041-1730286
Immunological Characteristics between αβ TDC and γδ TDC Cells in the Spleen of Breast Cancer-Induced Mice
Características imunológicas entre células TDC αβ e TDC γδ no baço de camundongos com câncer de mama induzidoFunding The present research was supported by the National Council for Scientific and Technological Development (CNPq, in the Portuguese acronym) (grant no. 30211/2015-3), the Foundation for Education and Research of Uberaba (FUNEPU, in the Portuguese acronym) (grant no. 255/2012), the Higher Education Personnel Improvement Coordination (CAPES, in the Portuguese acronym), and the Research Support Foundation of the State of Minas Gerais (FAPEMIG, in the Portuguese acronym) (grant no. Rede 11/14).
Abstract
Objective To evaluate the antitumoral role of γδ TDC cells and αβ TDC cells in an experimental model of breast cancer.
Methods Thirty female Balb/c mice were divided into 2 groups: control group (n = 15) and induced-4T1 group (n = 15), in which the mice received 2 × 105 4T1 mammary tumor cell line. Following the 28-day experimental period, immune cells were collected from the spleen and analyzed by flow cytometry for comparison of αβ TDC (TCRαβ+ CD11c+MHCII+) and γδ TDC (TCRγδ+CD11c+MHCII+) cells regarding surface markers (CD4+ and C8+) and cytokines (IFN-γ, TNF-α, IL-12 and IL-17).
Results A total of 26.53% of γδ TDC - control group (p < 0.0001) - the proportion of αβ TDC was lower in splenic cells than γδ TDC; however, these 2 cell types were reduced in tumor conditions (p < 0.0001), and the proportion of IFN-γ, TNF-α, IL-12 and IL-17 cytokines produced by γδ TDC was higher than those produced by αβ TDC, but it decreased under conditions of tumor-related immune system response (p < 0.0001).
Conclusion Healthy mice engrafted with malignant cells 4T1 breast tumor presented TDC with γδ TCR repertoire. These cells express cytotoxic molecules of lymphocytes T, producing anti-tumor proinflammatory cytokines.
Resumo
Objetivo Esclarecer o possível papel antitumoral das células TDC γδ e TDC αβ em um modelo experimental de câncer de mama.
Métodos Trinta baços de camundongos Balb/c analisados por citometria de fluxo, separados entre grupo controle (n = 15) e o grupo tumoral induzido por 4T1 (n = 15).
Resultados Presença de 26,53% de TDC γδ nos camundongos do grupo controle (p < 0,0001), proporção de TDC αβ menor em células esplênicas do que TDC γδ; no entanto, estes dois tipos de células são reduzidos em condições tumorais (p < 0,0001), e a proporção de citocinas IFN-γ, TNF-α, IL-12 e IL-17 produzidas pelas célula TDC γδ foi maior do que as produzidas pelas células TDC αβ, mas foram diminuídas sob condições de resposta ao sistema imunológico relacionada ao tumor (p < 0,0001).
Conclusão Camundongos saudáveis induzidos ao tumor de mama 4T1 apresentaram TDC com repertório TCR γδ. Estas células expressam moléculas citotóxicas de linfócitos T, produzindo citocinas proinflamatórias anti-tumor.
Contributors
All authors were involved in the design and interpretation of the analyses, contributed with the writing of the manuscript, read, and approved the final manuscript.
Publikationsverlauf
Eingereicht: 13. Mai 2020
Angenommen: 12. Februar 2021
Artikel online veröffentlicht:
02. Juni 2021
© 2021. Federação Brasileira de Ginecologia e Obstetrícia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)
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