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WDFY4 is required for cross-presentation in response to viral and tumor antigens.


ABSTRACT: During the process of cross-presentation, viral or tumor-derived antigens are presented to CD8+ T cells by Batf3-dependent CD8?+/XCR1+ classical dendritic cells (cDC1s). We designed a functional CRISPR screen for previously unknown regulators of cross-presentation, and identified the BEACH domain-containing protein WDFY4 as essential for cross-presentation of cell-associated antigens by cDC1s in mice. However, WDFY4 was not required for major histocompatibility complex class II presentation, nor for cross-presentation by monocyte-derived dendritic cells. In contrast to Batf3 -/- mice, Wdfy4 -/- mice displayed normal lymphoid and nonlymphoid cDC1 populations that produce interleukin-12 and protect against Toxoplasma gondii infection. However, similar to Batf3 -/- mice, Wdfy4 -/- mice failed to prime virus-specific CD8+ T cells in vivo or induce tumor rejection, revealing a critical role for cross-presentation in antiviral and antitumor immunity.

SUBMITTER: Theisen DJ 

PROVIDER: S-EPMC6655551 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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During the process of cross-presentation, viral or tumor-derived antigens are presented to CD8<sup>+</sup> T cells by <i>Batf3-</i>dependent CD8α<sup>+</sup>/XCR1<sup>+</sup> classical dendritic cells (cDC1s). We designed a functional CRISPR screen for previously unknown regulators of cross-presentation, and identified the BEACH domain-containing protein WDFY4 as essential for cross-presentation of cell-associated antigens by cDC1s in mice. However, WDFY4 was not required for major histocompatib  ...[more]

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