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Step-by-step: the CD8 T cell journey in leishmaniasis.
Erin A Fowler1, Fernanda O Novais1
1Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, Ohio, USA.
Mbio
|September 15, 2025
Summary
CD8 T cells play a dual role in leishmaniasis, a parasitic disease affecting millions. Understanding their function is key to developing new treatments and vaccines for leishmaniasis.
Area of Science:
- Immunology
- Parasitology
- Tropical Medicine
Background:
- Leishmaniasis is a vector-borne parasitic disease with diverse clinical outcomes.
- CD4 T cells are known for parasite control, but CD8 T cells also significantly impact leishmaniasis.
- The precise role of CD8 T cells in leishmaniasis pathogenesis and protection remains incompletely understood.
Purpose of the Study:
- To review the multifaceted roles of CD8 T cells in leishmaniasis.
- To explore CD8 T cell responses, including antigen recognition, recruitment, effector functions, memory, and dysfunction.
- To highlight recent advances and remaining questions regarding CD8 T cell involvement in leishmaniasis.
Main Methods:
- Review of existing literature, including murine models and human studies.
- Analysis of findings from transcriptomics, in vivo modeling, and immunophenotyping studies.
- Synthesis of current knowledge on CD8 T cell heterogeneity and regulation in leishmaniasis.
Main Results:
- CD8 T cells exhibit a dual role, contributing to both parasite control and immune-mediated tissue damage in leishmaniasis.
- Recent research clarifies conditions under which CD8 T cells aid or impede host defense.
- Advances in technology provide new insights into CD8 T cell behavior during infection.
Conclusions:
- Further investigation into CD8 T cell heterogeneity and regulation is crucial for understanding leishmaniasis.
- Understanding CD8 T cell dynamics can inform the development of targeted immunotherapies and vaccines.
- Continued research promises to deepen insights into host-pathogen interactions in leishmaniasis.
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