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• W3130758152 abstract "X-linked neutropenia (XLN) is caused by gain-of-function mutations in the actin regulator Wiskott-Aldrich Syndrome protein (WASp). XLN patients have reduced numbers of cytotoxic cells in peripheral blood; however, their capacity to kill tumor cells remains to be determined. Here, we examined NK and T cells from 2 patients with XLN harboring the activating WASpL270P mutation. XLN patient NK and T cells had increased granzyme B content and elevated degranulation and IFN-γ production when compared with healthy control cells. Murine WASpL272P NK and T cells formed stable synapses with YAC-1 tumor cells and anti-CD3/CD28-coated beads, respectively. WASpL272P mouse T cells had normal degranulation and cytokine response whereas WASpL272P NK cells showed an enhanced response. Imaging experiments revealed that while WASpL272P CD8+ T cells had increased accumulation of actin upon TCR activation, WASpL272P NK cells had normal actin accumulation at lytic synapses triggered through NKp46 signaling but had impaired response to lymphocyte function associated antigen-1 engagement. When compared with WT mice, WASpL272P mice showed reduced growth of B16 melanoma and increased capacity to reject MHC class I-deficient cells. Together, our data suggest that cytotoxic cells with constitutively active WASp have an increased capacity to respond to and kill tumor cells." @default.
• W3130758152 created "2021-03-01" @default.
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• W3130758152 date "2021-03-22" @default.
• W3130758152 modified "2023-10-12" @default.
• W3130758152 title "Constitutive activation of WASp leads to abnormal cytotoxic cells with increased granzyme B and degranulation response to target cells" @default.
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• W3130758152 doi "https://doi.org/10.1172/jci.insight.140273" @default.
• W3130758152 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8026198" @default.
• W3130758152 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33621210" @default.
• W3130758152 hasPublicationYear "2021" @default.
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