Regulatory T cells (Tregs) (CD4 CD25 FoxP3 ) are primarily targeted in cancer treatment to reverse their immunosuppressive effects within the tumor microenvironment, which allows tumors to escape immune surveillance. Strategies include depleting intratumoral Tregs, inhibiting their function, or modulating their metabolism to boost anti-tumor immune responses. Key aspects of Treg modulation in cancer treatment: Mechanism of Action: Tumors often show high infiltration of Tregs, which suppress effe