CXCL9 (also known as monokine induced by gamma interferon, MIG) is a chemokine that plays a critical role in immune surveillance by recruiting activated T cells, natural killer (NK) cells, and other leukocytes to the tumor microenvironment. Its expression is often regulated by interferon‐γ (IFN-γ) and other inflammatory cytokines.
– CXCL9 is often expressed by both tumor and stromal cells.
– High expression can be found in tumor microenvironments.
– Elevated CXCL9 expression is generally linked to a favorable prognosis due to effective immune cell recruitment.
Strategies that boost CXCL9 expression or restore its activity in immunologically "cold" tumors are being explored as potential means to enhance the efficacy of immunotherapies.
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