Technical Articles

This article focuses on the complex role of interferon-gamma (IFN-γ) in tumor immunity, systematically elucidating its anti-tumor mechanisms mediated through activating immune cells, promoting antigen presentation, and inducing chemokine production, while also analyzing its pro-tumor effects under specific conditions, such as inducing immune cell apoptosis, upregulating immune checkpoint molecules, and promoting angiogenesis.

Th1 cell polarization is a core process in adaptive immune responses, precisely driven by key cytokines such as IL-12 and IFN-γ. This process shapes type 1 immunity characterized by macrophage activation and cytotoxic T cell responses, serving as a cornerstone for eliminating intracellular pathogens.

Interferon-gamma (IFN-γ) is a crucial cytokine in the immune system, serving as a bridge between innate and adaptive immunity, and plays a complex and pivotal role in combating infections, suppressing tumors, and the development of autoimmune diseases.

**Interferon-gamma (IFN-γ)**, the sole member of the type II interferon family, differs from the primarily antiviral type I interferons by specializing in immune regulation. It is predominantly produced by activated immune cells, including **Natural Killer (NK) cells** which serve as the innate immune system's rapid-response force and are the primary early source of IFN-γ.

Cytokine-induced killer (CIK) cells demonstrate broad application prospects in adoptive immunotherapy for tumors. As a highly efficient, non-MHC-restricted killer cell population, CIK cells can effectively recognize and eliminate various tumor cells with minimal side effects.

Th2 cells, as a crucial subset of CD4+ helper T cells, undergo a precisely regulated differentiation process. Naïve CD4+ T cells recognize the MHC class II-peptide complex on the surface of antigen-presenting cells through their T cell receptor, receiving the first signal; simultaneously, they obtain the second signal through costimulatory molecules such as CD28, thereby completing the dual-signal activation.

IFN - γ, as the only member of type II interferon, plays a central regulatory role in the immune system. Its biological function far exceeds the initially discovered antiviral effect, and it has been confirmed that IFN - γ is involved in regulating multiple immune response processes, including innate and adaptive immunity.