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DOCK2-deficiency causes defects in anti-viral T cell responses and impaired control of herpes simplex virus infection.
Journal of Infectious Diseases 2024 Februrary 16
The expanding number of rare immunodeficiency syndromes offers an opportunity to understand key genes that support immune defence against infectious diseases. However, analysis of these in patients is complicated by their treatments and co-morbid infections requiring the use of mouse models for detailed investigations. Here we develop a mouse model of DOCK2 immunodeficiency and demonstrate that these mice have delayed clearance of herpes simplex virus type 1 (HSV-1) infections. We also uncovered a critical, cell intrinsic role of DOCK2 in the priming of anti-viral CD8+ T cells and in particular their initial expansion, despite apparently normal early activation of these cells. When this defect was overcome by priming in vitro, DOCK2-deficient CD8+ T cells were surprisingly protective against HSV-1-disease, albeit not as effectively as wild type cells. These results shed light on a cellular deficiency that is likely to impact anti-viral immunity in DOCK2-deficient patients.
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