Effect of embedded metal fragments on urinary metal levels and kidney biomarkers in the Sprague-Dawley rat

被引:8
|
作者
Hoffman, Jessica F. [1 ]
Vergara, Vernieda B. [1 ]
Fan, Anya X. [1 ]
Kalinich, John F. [1 ]
机构
[1] Uniformed Serv Univ Hlth Sci, Armed Forces Radiobiol Res Inst, Internal Contaminat & Met Tox Program, Bethesda, MD USA
关键词
Embedded metals; Rat; Urine; Kidney; Biomarker; DEPLETED URANIUM; INJURY MOLECULE-1; ALUMINUM; EXPOSURE; ALLOY; TOXICITY; CHILDREN; LEAD; WAR;
D O I
10.1016/j.toxrep.2021.02.023
中图分类号
R99 [毒物学(毒理学)];
学科分类号
100405 ;
摘要
Background: Wounds with embedded metal fragments are an unfortunate consequence of armed conflicts. In many cases the exact identity of the metal(s) and their long-term health effects, especially on the kidney, are not known. Aim of study: The aim of this study was to quantitate the urinary levels of metals solubilized from surgically implanted metal pellets and to assess the effect of these metals on the kidney using a battery of biomarker assays. Materials and methods: Using a rodent model system developed in our Institute to simulate embedded fragment injuries, eight metals considered likely components of an embedded fragment wound were individually implanted into the gastrocnemius muscle of male Sprague-Dawley rats. The rats were followed for 12 months post-implantation with urine collected prior to surgery then at 1-, 3-, 6-, 9-, and 12-months post-implantation to provide a within-subjects cohort for examination. Urinary metal levels were determined using inductively coupled plasma-mass spectrometry and urinary biomarkers assessed using commercially available kits to determine metal-induced kidney effects. Results: With few exceptions, most of the implanted metals rapidly solubilized and were found in the urine at significantly higher levels than in control animals as early as 1-month post-implantation. Surprisingly, many of the biomarkers measured were decreased compared to control at 1-month post-implantation before returning to normal at the later time points. However, two metals, iron and depleted uranium, showed increased levels of several markers at later time points, yet these levels also returned to normal as time progressed. Conclusion: This study showed that metal pellets surgically implanted into the leg muscle of Sprague-Dawley rats rapidly solubilized with significant levels of the implanted metal found in the urine. Although kidney biomarker results were inconsistent, the changes observed along with the relatively low amounts of metal implanted, suggest that metal-induced renal effects need to be considered when caring for individuals with embedded metal fragment wounds.
引用
收藏
页码:463 / 480
页数:18
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