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Splicing factor SRSF1 is essential for CD8 T cell function and host antigen-specific viral immunity.
Ignacio Juarez1,2, Shi Su1,3, Zachary T Herbert4
1Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.
Frontiers in Immunology
|October 3, 2022
Summary
The serine/arginine-rich splicing factor 1 (SRSF1) is vital for cytotoxic CD8 T cell numbers, function, and immune response to viral infections. SRSF1 regulates key signaling pathways essential for T cell proliferation and activity.
Area of Science:
- Immunology
- Molecular Biology
- Virology
Background:
- Cytotoxic CD8 T cells are critical for adaptive immunity against viral infections.
- The regulation of CD8 T cell homeostasis and function is complex and not fully understood.
Purpose of the Study:
- To investigate the role of serine/arginine-rich splicing factor 1 (SRSF1) in CD8 T cell physiology and function.
- To elucidate the molecular mechanisms by which SRSF1 influences T cell responses during viral pathogenesis.
Main Methods:
- Analysis of CD8 T cell numbers and function in SRSF1-deficient models.
- Transcriptomic analysis of Srsf1-deficient T cells.
- Investigation of the Mnk2/p38-MAPK signaling axis.
Main Results:
- SRSF1 is essential for maintaining CD8 T lymphocyte populations.
- SRSF1 is required for CD8 T cell proliferation, cytotoxic function, and IFN-γ responses.
- SRSF1 regulates MAP kinase and IFN signaling pathways, including the Mnk2/p38-MAPK axis.
Conclusions:
- SRSF1 plays a previously unrecognized role in cytotoxic CD8 T lymphocyte homeostasis and function.
- SRSF1 is a key regulator of T cell-mediated antiviral immunity.
- SRSF1 represents a potential target for modulating immune responses in viral infections.
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