Skunk musk causes methemoglobin and Heinz body formation in vitro. (13th September 2013)

• Record Type: Journal Article
• Authors: Fierro, Brittney R.; Agnew, Dalen W.; Duncan, Ann E.; Lehner, Andreas F.; Scott, Michael A.
• Is Part Of: Veterinary clinical pathology. Volume 42:Number 3(2013)
• Page Start: 291
• Page End: 300
• Publication Date: 2013-09-13
• Subjects: Veterinary pathology -- Periodicals; 636.089607
• DOI: 10.1111/vcp.12074
• Languages: English
• ISSNs: 0275-6382

Abstract

<abstract abstract-type="main" id="vcp12074-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="vcp12074-sec-0001" sec-type="section"> <title>Background</title> <p>A captive Red Panda developed a regenerative anemia with Heinz bodies after being sprayed by a skunk. A definite cause‐and‐effect relationship between skunk musk and oxidative erythrocyte damage has not been reported, but it was suspected in one reported case of a dog with Heinz body hemolytic anemia.</p> </sec> <sec id="vcp12074-sec-0002" sec-type="section"> <title>Objective</title> <p>The objective was to determine whether skunk musk induces oxidative HGB damage in vitro.</p> </sec> <sec id="vcp12074-sec-0003" sec-type="section"> <title>Methods</title> <p>Plasma and RBC were harvested from heparinized blood of 3 dogs, 3 cats, and a Red Panda. Skunk musk was solubilized in ethanol and mixed with plasma from each species to make stock solutions of 4% musk and 4% ethanol. Aliquots of RBC were resuspended in autologous stock solutions and solvent controls to yield musk concentrations of 0%, 0.04%, and 0.4% (by volume). Aliquots were incubated at 37°C for 4–72 hours and assessed for oxidative damage by visual inspection, optical absorbance spectroscopy, transmission electron microscopy, and light microscopy after Wright and vital New Methylene Blue staining.</p> </sec> <sec id="vcp12074-sec-0004" sec-type="section"> <title>Results</title> <p>Dose‐dependent brown color and absorption changes characteristic of methemoglobin were present by 4 hours and increased over 24 hours (Red Panda) and 72 hours (dog and cat). Similarly, there were time‐dependent (all species) and dose‐dependent (dog and cat) increases in the number of Heinz bodies, which were present by 4 hours and numerous by 24 hours.</p> </sec> <sec id="vcp12074-sec-0005" sec-type="section"> <title>Conclusions</title> <p>In vitro, skunk musk causes Heinz body and methemoglobin formation in canine, feline, and Red Panda RBC, supporting the clinical association between Heinz body hemolytic anemia and skunk spray exposure.</p> </sec> </abstract>