Parasitology (Apr 2023)

Immunological mechanisms involved in macrophage activation and polarization in schistosomiasis

  • Irlla Correia Lima Licá,
  • Gleycka Cristine Carvalho Gomes Frazão,
  • Ranielly Araujo Nogueira,
  • Maria Gabriela Sampaio Lira,
  • Vitor Augusto Ferreira dos Santos,
  • João Gustavo Mendes Rodrigues,
  • Guilherme Silva Miranda,
  • Rafael Cardoso Carvalho,
  • Lucilene Amorim Silva,
  • Rosane Nassar Meireles Guerra,
  • Flávia Raquel Fernandes Nascimento

DOI
https://doi.org/10.1017/S0031182023000021
Journal volume & issue
Vol. 150
pp. 401 – 415

Abstract

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Human schistosomiasis is caused by helminths of the genus Schistosoma. Macrophages play a crucial role in the immune regulation of this disease. These cells acquire different phenotypes depending on the type of stimulus they receive. M1 macrophages can be ‘classically activated’ and can display a proinflammatory phenotype. M2 or ‘alternatively activated’ macrophages are considered anti-inflammatory cells. Despite the relevance of macrophages in controlling infections, the role of the functional types of these cells in schistosomiasis is unclear. This review highlights different molecules and/or macrophage activation and polarization pathways during Schistosoma mansoni and Schistosoma japonicum infection. This review is based on original and review articles obtained through searches in major databases, including Scopus, Google Scholar, ACS, PubMed, Wiley, Scielo, Web of Science, LILACS and ScienceDirect. Our findings emphasize the importance of S. mansoni and S. japonicum antigens in macrophage polarization, as they exert immunomodulatory effects in different stages of the disease and are therefore important as therapeutic targets for schistosomiasis and in vaccine development. A combination of different antigens can provide greater protection, as it possibly stimulates an adequate immune response for an M1 or M2 profile and leads to host resistance; however, this warrants in vitro and in vivo studies.

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