Accession Number : ADA410643
Title : Toxicological Evaluation of Depleted Uranium in Rats: Six-Month Evaluation Point
Descriptive Note : Special rept.
Corporate Author : ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
Personal Author(s) : Fellmar, T. C. ; Hogan, J. B. ; Benson, K. A. ; Landauer, M. R.
Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA410643
Report Date : 01 FEB 1998
Pagination or Media Count : 30
Abstract : The use of depleted uranium (DU) munitions during Desert Storm resulted in a unique type of battlefield casualty DU shrapnel wounds. The toxicity associ- ated with embedded DU may differ significantly from other metals or other routes of uranium administration. This is a 6-month interim report of an 18- month study that is designed to assess the toxicity of implanted DU pellets. This study evaluates kidney behavioral and neural toxicity associated with intra- muscularly implanted DU pellets (1 -mm x 2-mm) and assesses tissues for histological changes and for uranium content. Rats were assigned to five experimental groups: 1) a non-implanted sham-surgical control group 2) rats implanted with 20 tantalum (Ta) to control for fragment implantation 3) rats implanted with low-dose DU (4 DU and 16 Ta pellets) 4) rats implanted with medium-dose DU (10 DU and 10 Ta pellets) and 5) rats implanted with high-dose DU (20 DU pellets). Uranium levels were high and dose-dependent in the kidney, urine and bone. Despite high uranium levels in the kidney no renal toxicity was evident. Between 23-26 weeks body weight in high-DU dose animals was significantly lower than controls. Unexpectedly uranium was found in the brain of DU-implanted animals. No behavioral neurotoxicity was evident. Excitability of hippocampal neurons was reduced in the high DU dose animals at 6 months. These data suggest that at the 6-month time point renal toxicity may be less of a hazard than anticipated. While these results indi- cate that toxicity is not evident at 6 months with exposure to embedded DU, there is a need to further investigate long-term effects in light of the high levels accumulated in some body tissues.
Descriptors : *URANIUM COMPOUNDS, *AMMUNITION FRAGMENTS, *TOXICOLOGY, KUWAIT, TISSUES(BIOLOGY), HAZARDS, RATS, BATTLEFIELDS, TOXICITY, LONG RANGE(TIME), CONCENTRATION(COMPOSITION), CASUALTIES, NERVOUS SYSTEM, NERVE CELLS, HUMAN BODY, WOUNDS AND INJURIES, BEHAVIOR, DEPLETED URANIUM, BODY WEIGHT, URINE, HISTOLOGY, HIPPOCAMPUS, KIDNEYS, NEUROTOXINS, IRAQ, METALS, TEST AND EVALUATION, MILITARY OPERATIONS
Subject Categories : TOXICOLOGY
Distribution Statement : APPROVED FOR PUBLIC RELEASE