CD4+ T cells and macrophages collaborate to cut off tumor blood supply via IL-3 and TNF signaling
By
Rémy Bosselut
Summary
This study by Lian et al. reveals a novel mechanism by which CD4+ T cells and macrophages collaborate to impair tumor growth. CD4+ T cells recognize tumor antigens and release interleukin-3 (IL-3), which instructs macrophages to produce tumor necrosis factor (TNF). This signaling cascade damages intratumoral blood vessels, cutting off the tumor's blood supply and leading to cancer cell death. The findings highlight a non-direct killing mechanism of immune cells against tumors, offering potential new avenues for cancer immunotherapy beyond conventional T cell-focused strategies.
Source
Twitter / XCD4+ T cells and macrophages collaborate to cut off tumor blood supply via IL-3 and TNF signalingscience.orgKey quotes
· 3 pulledCD4+ T cells recognized tumor antigens and triggered macrophages to cluster around intratumoral blood vessels.
The T cells released a signal (interleukin-3) that instructed macrophages to produce tumor necrosis factor, which damaged the tumor vasculature.
Identification of tumor immunosurveillance and antigen recognition mechanisms is key for the development of improved cancer treatments.
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