Abstract:
:Thymic lymphoma/leukemia is the major cause of death in B6C3F1 mice chronically exposed to 1,3-butadiene (BD). Similar to radiation-induced murine thymic lymphoma, the bone marrow is also a major target organ. Because of the association of murine thymic lymphoma with endogenous type-C murine leukemia retroviruses (MuLV) present in the germ line of most strains of laboratory mice, including B6C3F1 and its parent strains, we examined the effects of BD exposure on NIH Swiss mice which do not possess intact endogenous ecotropic MuLV. Male NIH Swiss mice exhibited a macrocytic-megaloblastic anemia following inhalation of 1250 ppm BD for 6 weeks. Treatment-related changes included decreases in circulating erythrocytes, total hemoglobin, and hematocrit and an increase in mean corpuscular volume. An eightfold increase in circulating micronuclei was also observed. The anemia was not accompanied by a significant alteration in mean corpuscular hemoglobin concentration, an increase in circulating reticulocytes, or an increase in circulating nucleated erythrocytes. These findings are consistent with a treatment-related macrocytic-megaloblastic anemia and indicate that the bone marrow is an important target for BD toxicity in mice independent of MuLV background and expression.
journal_name
Toxicol Appl Pharmacoljournal_title
Toxicology and applied pharmacologyauthors
Irons RD,Smith CN,Stillman WS,Shah RS,Steinhagen WH,Leiderman LJdoi
10.1016/0041-008x(86)90352-2subject
Has Abstractpub_date
1986-09-30 00:00:00pages
450-5issue
3eissn
0041-008Xissn
1096-0333journal_volume
85pub_type
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