Lymphocyte depletion by ionizing radiation

Lymphocyte depletion by ionizing radiation refers to the decrease in lymphocyte (T cells, B cells, and NK cells) numbers following exposure to ionizing radiation, a recognized consequence of both therapeutic and accidental irradiation[7]. Lymphocytes are among the most radiosensitive cells in the body and can undergo rapid apoptosis due to DNA damage and oxidative stress caused by ionizing radiation[6][7]. The extent and persistence of depletion depend on the dose and duration of exposure; higher doses cause more pronounced and prolonged lymphopenia[3][5]. While this process can contribute to the immunosuppressive effects of radiation therapy (such as increased risk of infection), selective modulation of lymphocyte survival or function by radioprotective agents (e.g., taurine) is under investigation[6]. Lymphocyte depletion can also alter the balance and function of immune cell subtypes, with downstream effects on immune surveillance, inflammation, and potentially cancer development or progression[1][3][5]. Absolute lymphocyte count and lymphocyte functional assays may serve as biomarkers for monitoring these effects[1][4][5]. Summary: "Lymphocyte depletion by ionizing radiation" describes an *effect*, not a molecular target or receptor, and cannot be mapped to canonical drug target designations[3][5][6][7].

Other names

Lymphocyte reduction by ionizing radiationRadiation-induced lymphopeniaRadiation-related lymphocyte depletion

Radioprotectants: scavenging of free radicals, protection against apoptosis