Host response to tumors
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The immune response to foreign antigens consists of
Humoral mechanisms (eg, antibodies)
Cellular mechanisms(See also Tumor Antigens.)
Most humoral responses cannot prevent tumor growth. However, effector cells, such as T cells, macrophages, and natural killer cells, have relatively effective tumoricidal abilities. Effector cell activity is induced by cells that present tumor-specific antigens (TSAs) or tumor-associated antigens (TAAs) on their surface (these cells are called antigen-presenting cells) and is supported by cytokines (eg, interleukins, interferons). Despite the activity of effector cells, host immunoreactivity may fail to control tumor occurrence and growth.
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