The Influence of the Genetic and Immunologic Context in the Development of Colorectal Adenoma: A Case Series Report

Authors

  • Diogo Garcia Medical Faculty. University of Porto. Porto.
  • Louisa Spaans Maastricht University. Maastricht.
  • Sara Miranda Instituto de Investigação e Inovação em Saúde. Universidade do Porto. Porto.
  • Gilza Gonçalves Institute of Molecular Pathology and Immunology. Universidade do Porto. Porto.
  • Joana Reis Instituto de Investigação e Inovação em Saúde. Universidade do Porto. Porto.
  • José Luís Costa Instituto de Investigação e Inovação em Saúde. Universidade do Porto. Porto.
  • Cecília Durães Instituto de Investigação e Inovação em Saúde. Universidade do Porto. Porto.
  • Fátima Carneiro Medical Faculty. University of Porto. Porto. Instituto de Investigação e Inovação em Saúde. Universidade do Porto. Porto. Institute of Molecular Pathology and Immunology. Universidade do Porto. Porto. Department of Pathology. Medical Faculty. University of Porto. Porto. Department of Pathology. Centro Hospitalar e Universitário São João. Porto.
  • José Carlos Machado Medical Faculty. University of Porto. Porto. Instituto de Investigação e Inovação em Saúde. Universidade do Porto. Porto. Institute of Molecular Pathology and Immunology. Universidade do Porto. Porto. Department of Pathology. Medical Faculty. University of Porto. Porto.

DOI:

https://doi.org/10.20344/amp.12462

Keywords:

Adenoma/diagnosis, Adenoma/genetics, Colorectal Neoplasms/diagnosis, Colorectal Neoplasms/genetics, Immunohistochemistry

Abstract

Introduction: Overcoming immunosurveillance is a major step in the progression of many types of tumors. Several immune escape strategies have been identified, including immunoediting and the establishment of an immune suppressive microenvironment. The aim of the present study was to determine whether the hereditary or sporadic context has any influence in the relationship between immune surveillance and tumor development, using sporadic and familial adenomatous polyposis related colorectal adenomas as a model.
Material and Methods: The immune tumor-infiltrating cells of a total of 58 low-grade and 18 high-grade colorectal adenomas were examined and compared, using immunostaining for CD3, CD4, CD8, CD57, CD68 and FoxP3.
Results: FoxP3 and CD68 counts were significantly higher in sporadic low-grade dysplasia (p = 0.0003 and p = 0.0103, respectively),and FoxP3 and CD4 counts were found to be significantly higher in high-grade sporadic dysplasia (p = 0.0008 and p = 0.0018, respectively)when compared with corresponding lesions in patients with familial adenomatous polyposis.
Discussion: This study suggests that the immune microenvironment of sporadic and hereditary lesions is different. Sporadic lesions contain a higher number of immune suppressive Treg cells, which suggests a stronger immune selective pressure. In contrast, hereditarylesions seem to benefit from a more tolerant immune microenvironment, allowing for the development of lesions with lower immune cell infiltration.
Conclusion: This study shows that sporadic lesions harbor higher tumor-infiltrating immune cell counts, which might reflect a higher immune tolerance towards hereditary lesions.

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Published

2020-05-04

How to Cite

1.
Garcia D, Spaans L, Miranda S, Gonçalves G, Reis J, Costa JL, Durães C, Carneiro F, Machado JC. The Influence of the Genetic and Immunologic Context in the Development of Colorectal Adenoma: A Case Series Report. Acta Med Port [Internet]. 2020 May 4 [cited 2024 Apr. 25];33(5):297-304. Available from: https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/12462

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Section

AMP Student Original