Crystal Medical Life|🏥| on Instagram: "CD4+ T helper cells activate CD8+ T cells by producing cytokines like IL-2, which stimulate CD8+ T cell proliferation and differentiation. They also "license" antigen-presenting cells (APCs) to present antigens more effectively to CD8+ T cells through enhanced expression of co-stimulatory molecules. This process is crucial for the adaptive immune response, enabling CD8+ T cells to become cytotoxic T lymphocytes that can directly kill infected or malignant

Future Biotechnology on Instagram: "How T Cells Kill Cancer Cells T cells, especially cytotoxic CD8+ T lymphocytes, play a central role in the body’s immune defense against cancer. When a T cell recognizes a cancer cell through its T cell receptor (TCR), it forms a specialized junction called the immune synapse. This structure allows the T cell to deliver lethal proteins, such as perforin and granzymes, directly into the cancer cell. Perforin creates pores in the target cell membrane, while gran