Ionizing Radiation and Chemotherapeutic Drugs Induce Apoptosis in Lymphocytes in the Absence of FAS or Fadd/Mort1 Signaling
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Discussion
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Implication
Randomized trial investigates how radiation and drugs cause cell death in lymphocytes, suggesting alternative pathways are involved.
Key Points
- The study aims to explore how ionizing radiation and chemotherapeutic drugs induce apoptosis in lymphocytes without using Fas signaling.
- Utilized Fas-deficient lpr mice and transgenic mice with mutant FADD/MORT1 to assess lymphocyte sensitivity.
- Examined T cell responses to gamma radiation and various anticancer drugs.
- Analyzed the role of p53 and Bcl-2 in the apoptosis response of lymphocytes.
- Lymphocytes from Fas-deficient lpr mice were as sensitive to ionizing radiation and drugs as normal lymphocytes.
- p53 deficiency and Bcl-2 overexpression increased lymphocyte resistance to radiation and chemotherapy but did not affect Fas-mediated killing.
- Both lpr and wild-type T cells exhibited reduced proliferation after drug treatment, whereas Bcl-2 transgenic or p53-deficient cells maintained clonogenic potential.
Cite This Study
Newton et al. (2000) studied this question.