American Association for Cancer Research
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Data Supplement from Natural Killer Cells Eradicate Galectin-1–Deficient Glioma in the Absence of Adaptive Immunity

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posted on 2023-03-30, 22:44 authored by Gregory J. Baker, Peter Chockley, Viveka Nand Yadav, Robert Doherty, Michael Ritt, Sivaraj Sivaramakrishnan, Maria G. Castro, Pedro R. Lowenstein

Supplementary Figure S6. Validating immunodepletion of NK cells and basophils in RAG1-/- mice.



Natural killer (NK) cells safeguard against early tumor formation by destroying transformed target cells in a process referred to as NK immune surveillance. However, the immune escape mechanisms used by malignant brain tumors to subvert this innate type of immune surveillance remain unclear. Here we show that malignant glioma cells suppress NK immune surveillance by overexpressing the β-galactoside–binding lectin galectin-1. Conversely, galectin-1–deficient glioma cells could be eradicated by host NK cells before the initiation of an antitumor T-cell response. In vitro experiments demonstrated that galectin-1–deficient GL26-Cit glioma cells are ∼3-fold more sensitive to NK-mediated tumor lysis than galectin-1–expressing cells. Our findings suggest that galectin-1 suppression in human glioma could improve patient survival by restoring NK immune surveillance that can eradicate glioma cells. Cancer Res; 74(18); 5079–90. ©2014 AACR.

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