Use of multiparameter analysis to quantitate hematological damage from exposure to a chemical (ethylene oxide)
Mice exposed to 255 ppm ethylene oxide (EtO) for 6 h/d were removed for analysis after 1,2,4,8 and 14 d (sequential exposure) and 4,6,8 and 10 wk (5 d/wk). Prior to sacrifice, blood was removed from the orbital sinus for blood cell counts, hemoglobin determination, and hematocrit. A blood film was made for differential leukocyte counts. Bone marrow was flushed from femurs and tibias and counted, and aliquots were used for stem-cell assay (CFU-S) or flow cytometry (FCM) analysis. One aliquot of marrow was stained with propidium iodide for cell-cycle analysis and another was reacted with fluorescein-conjugated monoclonal antibody for B-cell analysis. The preparations were analyzed for forward and 90/sup 0/ scatter and fluorescence on an Ortho 50H cytofluorograph. Perturbations of peripheral leukocytes occurred after one exposure. After multiple exposures, hematocrit, red-cell number, and hemoglobin were generally depressed, with transient compensatory bursts, and bone marrow cellularity and CFU-S were below normal. However, white-cell numbers fluctuated dramatically during the exposure period. There was a shift in differential toward granulocytes, at times resulting in severely depressed numbers of lymphocytes in the peripheral blood. The FCM analysis showed an early depletion of granulocytes in the bone marrow followed by replacement and a relative lymphocyte deficit, especially pronounced at 10 wk. The B-cell changes reflected general lymphocyte perturbations. Shifts in numbers of cells in S and G/M were observed, consistent with a moderate bone marrow response to cell loss.
- Research Organization:
- Oak Ridge National Lab., TN
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5001564
- Journal Information:
- J. Toxicol. Environ. Health; (United States), Vol. 18:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ETHYLENE
TOXICITY
MICE
BLOOD CHEMISTRY
BLOOD FORMATION
BONE MARROW
CELL FLOW SYSTEMS
CFU
EXPERIMENTAL DATA
LEUKOCYTES
LYMPHOCYTES
MONOCLONAL ANTIBODIES
OXIDES
PARAMETRIC ANALYSIS
STEM CELLS
ALKENES
ANIMAL CELLS
ANIMAL TISSUES
ANIMALS
ANTIBODIES
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY
BODY FLUIDS
CHALCOGENIDES
CONNECTIVE TISSUE CELLS
DATA
HEMATOPOIETIC SYSTEM
HYDROCARBONS
INFORMATION
MAMMALS
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANS
OXYGEN COMPOUNDS
RODENTS
SOMATIC CELLS
TISSUES
VERTEBRATES
560305* - Chemicals Metabolism & Toxicology- Vertebrates- (-1987)