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April 10, 2026Science Translational Medicine

Pharmacological activation of WASp potentiates macrophage phagocytosis and enhances ibrutinib efficacy against mouse models of brain tumors

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Authors

YCYu ChengTLTao LiMWMengru Wang

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Overview

Preclinical study demonstrates that WASp activation boosts phagocytosis in tumor-associated macrophages, enhancing ibrutinib's effectiveness against brain tumors.

Key Points

  • To investigate how pharmacological activation of WASp affects macrophage phagocytosis and ibrutinib's efficacy against brain tumors.
  • Utilized preclinical mouse models of brain tumors including glioblastomas and CNS lymphomas.
  • Administered ibrutinib, a TKI, and assessed its impact on tumor growth and TAM phagocytic function.
  • Activated WASp pharmacologically using EG-011 to restore TAM function.
  • Performed single-cell RNA sequencing to analyze TAM subsets and their correlation with survival.
  • Ibrutinib treatment reduced TAM phagocytic efficacy despite tumor growth suppression.
  • Activation of WASp restored TAM phagocytosis and improved ibrutinib efficacy.
  • Elevated phosphorylated BTK and WASp levels in TAMs were linked to enhanced phagocytic capacity and better survival outcomes in glioblastoma patients.

Cite This Study

Cheng et al. (2026) studied this question.

synapsesocial.com/papers/69d8967d6c1944d70ce07fb3https://doi.org/10.1126/scitranslmed.aed1155
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