Open AccessREGENERATION OF CFUs IN THE MARROW OF MICE EXPOSED TO 300 RADS AFTER HAVING RECOVERED FROM 950 RADS
Author(s) -
KEDO A.,
BARONE JUDITH,
FRIED W.
Publication year - 1976
Publication title -
cell proliferation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.647
H-Index - 74
eISSN - 1365-2184
pISSN - 0960-7722
DOI - 10.1111/j.1365-2184.1976.tb01303.x
Subject(s) - haematopoiesis , population , irradiation , nuclear medicine , andrology , regeneration (biology) , bone marrow , chemistry , medicine , pathology , biology , stem cell , microbiology and biotechnology , physics , environmental health , nuclear physics
Exposure to 950 rads 60 Co radiation has been reported to cause long‐lasting damage to the hematopoietic stroma (HS), although the size of the CFUs population recovers to pre‐irradiation levels. In these studies HS damage was detected only after subcutaneously implanting the femurs of the irradiated mice into syngeneic hosts. To exclude the possibility that what was considered to be HS damage was merely caused by artifacts due to the process of implantation in a new host, we compared the rate of regeneration of CFUs in mice which had recovered from 950 rads prior to receiving 300 rads 60 Co radiation (950 + 300 rads group) with that of mice which received only 300 rads (0 + 300 rads group). The CFUs population in the 950 + 300 rads group grew exponentially for 2 weeks at a rate which did not differ significantly from that of CFUs in the 0 + 300 rads group. However, the rate of CFUs growth reached a plateau before full recovery was achieved in contrast to that in the 0 + 300 rads mice. We therefore conclude that the incomplete regeneration of CFUs in the marrows of 950 + 300 rads mice was most likely caused by X‐irradiation‐induced damage to the HS rather than damage to the inherent repopulating potential of the CFUs per se.