title: Chromosome aberrations in B lymphocytes of atomic bomb survivors.
abstract: Although chromosome aberrations in T lymphocytes and bone marrow cells have been reported in atomic bomb survivors, the presence of chromosome abnormalities has not been demonstrated in B lymphocytes because of the technical difficulties involved in B-lymphocyte separation. A method for detecting chromosome aberrations in B lymphocytes was established by "stimulation" of B lymphocytes with Epstein-Barr virus (EBV) instead of "separation" of B lymphocytes by rosette formation. The EBV-stimulated lymphocytes were isolated as single colonies in soft agar and transferred to liquid culture for further cell growth. The EBV-stimulated B lymphocytes of two heavily exposed survivors showed 50% and 12.5% chromosome abnormalities 30 yr after exposure to the effects of the atomic bomb. The former patient seemed to have a karyotypically abnormal clone of B lymphocytes in vivo. The method used in this study and the evidence of chromosome aberrations in B lymphocytes for long periods after radiation exposure will be useful and important in elucidating the malignant processes of acute lymphocytic leukemia, B-cell lymphoma, and multiple myeloma among high-risk groups having a history of accidental or therapeutic exposure to radiation or radiomimetic drugs.
mesh_terms: D000293:Adolescent; D000328:Adult; D001402:B-Lymphocytes / Q000528:radiation effects*; D001853:Bone Marrow / Q000528:radiation effects; D002869:Chromosome Aberrations; D005260:Female; D004854:Herpesvirus 4, Human; D006801:Humans; D007621:Karyotyping; D008297:Male; D009689:Nuclear Warfare; D013601:T-Lymphocytes / Q000528:radiation effects