Harry S. Truman Memorial Veterans' Hospital, Columbia, MO, 65201, USA; Departments of Veterinary Medicine & Surgery and Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia, MO, 65211, USA.
Harry S. Truman Memorial Veterans' Hospital, Columbia, MO, 65201, USA; Mason Eye Institute, School of Medicine, University of Missouri, Columbia, MO, 65212, USA.
Exp Eye Res. 2023 Sep;234:109575. doi: 10.1016/j.exer.2023.109575. Epub 2023 Jul 13.
Acrolein is a highly reactive volatile toxic chemical that injures the eyes and many organs. It has been used in wars and terrorism for wounding masses on multiple occasions and is readily accessible commercially. Our earlier studies revealed acrolein's toxicity to the cornea and witnessed damage to other ocular tissues. Eyelids play a vital role in keeping eyes mobile, moist, lubricated, and functional utilizing a range of diverse lipids produced by the Meibomian glands located in the upper and lower eyelids. This study sought to investigate acrolein's toxicity to eyelid tissues by studying the expression of inflammatory and lipid markers in rabbit eyes in vivo utilizing our reported vapor-cap model. The study was approved by the institutional animal care and use committees and followed ARVO guidelines. Twelve New Zealand White Rabbits were divided into 3 groups: Naïve (group 1), 1-min acrolein exposure (group 2), or 3-min acrolein exposure (group 3). The toxicological effects of acrolein on ocular health in live animals were monitored with regular clinical eye exams and intraocular pressure measurements and eyelid tissues post-euthanasia were subjected to H&E and Masson's trichrome histology and qRT-PCR analysis. Clinical eye examinations witnessed severely swollen eyelids, abnormal ocular discharge, chemosis, and elevated intraocular pressure (p < 0.001) in acrolein-exposed eyes. Histological studies supported clinical findings and exhibited noticeable changes in eyelid tissue morphology. Gene expression studies exhibited significantly increased expression of inflammatory and lipid mediators (LOX, PAF, Cox-2, and LTB4; p < 0.001) in acrolein-exposed eyelid tissues compared to naïve eyelid tissues. The results suggest that acrolein exposure to the eyes causes acute damage to eyelids by altering inflammatory and lipid mediators in vivo.
丙烯醛是一种具有高度反应性和挥发性的有毒化学物质,会伤害眼睛和许多器官。它曾多次在战争和恐怖主义中被用于伤害群众,并且在商业上很容易获得。我们之前的研究揭示了丙烯醛对角膜的毒性,并观察到它对其他眼部组织的损伤。眼睑在保持眼睛活动、湿润、润滑和功能方面起着至关重要的作用,它利用位于上下眼睑的睑板腺产生的一系列不同的脂质来实现这一功能。本研究旨在通过利用我们之前报道的蒸气罩模型,在体内研究丙烯醛对兔眼组织的毒性,研究炎症和脂质标志物在兔眼组织中的表达。该研究得到了机构动物护理和使用委员会的批准,并遵循了 ARVO 指南。将 12 只新西兰白兔分为 3 组:对照组(第 1 组)、1 分钟丙烯醛暴露组(第 2 组)或 3 分钟丙烯醛暴露组(第 3 组)。通过定期的临床眼部检查和眼压测量以及死后的眼睑组织进行 H&E 和 Masson 三色组织学和 qRT-PCR 分析,监测丙烯醛对活体动物眼部健康的毒理学影响。临床眼部检查发现,丙烯醛暴露组的眼睛出现严重肿胀的眼睑、异常的眼部分泌物、球结膜水肿和眼压升高(p<0.001)。组织学研究支持了临床发现,并显示了眼睑组织形态的明显变化。基因表达研究显示,与对照组相比,丙烯醛暴露的眼睑组织中炎症和脂质介质(LOX、PAF、Cox-2 和 LTB4)的表达显著增加(p<0.001)。研究结果表明,丙烯醛暴露于眼睛会通过改变体内的炎症和脂质介质,对眼睑造成急性损伤。
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