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B lymphocyte differentiation in lethally irradiated and reconstituted mice. I. The effect of strontium-89 induced bone marrow aplasia on the recovery of the B cell compartment in the spleen

Journal Article · · Cell. Immunol.; (United States)
The influence of /sup 89/Sr-treatment on the recovery of the B cell compartment in lethally irradiated, fetal liver reconstituted mice was studied by means of membrane fluorescence, /sup 89/Sr is a bone-seeking radio-isotope which causes in a dose of 3 ..mu..Ci /sup 89/Sr/g body weight a depletion of all nucleated cells, including immunoglobulin-bearing (B) cells, of the bone marrow. Treatment of irradiated and fetal liver reconstituted mice with 3 ..mu..Ci /sup 89/Sr/g body weight immediately and at 17 days after irradiation and reconstitution prevented recovery of the nucleated cell population, including B cells, in the bone marrow. In the spleen of such mice both nucleated cells and B cells reappeared at day 7 and 14 respectively. The B cell population in the spleen did not recover up to normal values during the experimental period of 45 days. It is concluded that B cell differentiation in lethally irradiated, fetal liver reconstituted mice can take place outside the bone marrow. The efficiency of this extra-medullary differentiation is discussed. The conclusion was drawn that mice with a /sup 89/Sr-induced bone marrow aplasia are able to generate B lymphocytes. Consequently the bone marrow microenvironment seems not to be obligate to the differentiation of B lymphocytes. The peripheral lymphoid organs of such mice were found to be unable to compensate completely for the absence of B lymphocyte production in the bone marrow.
Research Organization:
Erasmus Univ., Rotterdam
OSTI ID:
7333949
Journal Information:
Cell. Immunol.; (United States), Journal Name: Cell. Immunol.; (United States) Vol. 24:1; ISSN CLIMB
Country of Publication:
United States
Language:
English

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