IL-10 is a multifaceted immune-suppressive cytokine and possesses immune-regulatory and angiogenic functions.
It primarily acts as an anti-inflammatory cytokine, protecting the body from an uncontrolled immune response, mostly through the Jak1/Tyk2 and STAT3 signaling pathway. On the other hand, IL-10 can also have immunostimulating functions under certain conditions.
The role of IL-10 in tumor pathogenesis is currently highly controversial, with some findings showing that IL-10 promotes tumor development and angiogenesis, while others supporting that it inhibits tumor growth and metastasis.
IL-10 is often expressed in various cancers, including breast cancer, colorectal cancer, melanoma, and lymphoma. Its expression can vary significantly depending on the tumor type and the immune context.
Elevated levels of IL-10 are frequently associated with the presence of tumor-infiltrating immune cells, particularly Tregs and M2 macrophages.
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