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RECORD NUMBER: 12 OF 15

OLS Field Name OLS Field Data
Main Title Morphometric Analysis of Osteosclerotic Bone Resulting from Hexachlorobenzene Exposure.
Author Andrews, J. E. ; Jackson, L. D. ; Stead, A. G. ; Donaldson, W. E. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. ;Organon Teknika Corp., Durham, NC. Documentation and Clinical Studies Div. ;North Carolina State Univ. at Raleigh.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/432;
Stock Number PB91-171876
Additional Subjects Hexachlorobenzene ; Toxicity ; Osteosclerosis ; Bones ; Biomechanics ; Organ weight ; Dose-response relationships ; Body weight ; Hyperparathyroidism ; Statistical analysis ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB91-171876 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/04/1991
Collation 11p
Abstract
Hexachlorobenzene (HCB) exposure has been shown to induce hyperparathyroidism and osteosclerosis in rats. Experiments were undertaken to investigate the effects of HCB on femur morphometry as well as breaking strength. Fischer 344 rats were dosed 5 days/wk for 15 wks with 0, 0.1, 1, 10 or 25 mg HCB/kg body weight. Hyperparathyroidism was produced in the two higher dose groups as reported previously (Andrews et al., 1988). Femur weight was significantly increased in the rats receiving 0.1, 1 and 25 mg HCB/kg body weight wheras density was increased significantly at 1, 10 and 25 mg HCB/kg dose levels. Bone strength was also significantly increased at the three higher dose levels. Bone flexibility was significantly increased at the 0.1 mg HCB dose level. Cross sectional area of the midpoint of the femur was significantly increased at the 1 mg/kg HCB dose level. Cortical area, as well as the proportion of the total area of the bone which the cortex occupied, were significantly increased at the three higher dose levels. Medullary cavity area was significantly increased at the 0.1 mg/kg dose level but significantly decreased at the two higher dose levels of HCB.