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T-Cell Activation

Meaning

T-Cell Activation is the crucial process by which quiescent T lymphocytes of the immune system are stimulated to proliferate, differentiate, and execute their specific effector functions, such as killing infected cells or assisting B-cells. This highly regulated event is essential for a robust and targeted adaptive immune response against pathogens and abnormal cells. The hormonal milieu, particularly glucocorticoids and sex steroids, profoundly influences the threshold and outcome of T-cell activation.