title: Studies of long-term continuous irradiations using daily doses ranging from 0.07 to 0.30 Gy on the B lymphoid system of the rat.
abstract: The effects of a continuous exposure to cobalt gamma rays administered to rats at a daily dose of 0, 0.07, 0.12, 0.20 or 0.30 Gy for a period of up to 90 or 135 days, have been observed on their B lymphocyte populations and on their immunoglobulin serum levels. The effects increase with the daily dose and the duration of irradiation. At a daily dose of 0.07 Gy, no clear effect was observed. The depletion was almost negligible after 30 days at a daily dose of 0.12 Gy, but visible after all other doses and durations. However, a clear difference in susceptibility was observed between the marginal zone B compartment and the follicular one, the former being much more affected by the radiation than the second.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000528:radiation effects*; D002452:Cell Count; D004307:Dose-Response Relationship, Radiation; D005455:Fluorescent Antibody Technique; D006651:Histocytochemistry; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D008297:Male; D010950:Plasma Cells / Q000528:radiation effects; D051381:Rats; D011919:Rats, Inbred Strains; D013154:Spleen / Q000166:cytology / Q000528:radiation effects; D013997:Time Factors
chemical_list: D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M