新型 PrC-210 自由基清除剂显著改善大鼠后肢带血管复合组织同种异体移植物的冷保存效果。
Significantly Improved Cold Preservation of Rat Hind Limb Vascularized Composite Allografts Using the New PrC-210 Free Radical Scavenger.
机构信息
Wisconsin Institute of Medical Research, University of Wisconsin-Madison, 111 Highland Ave., Madison, WI 53705, USA.
Division of Plastic Surgery, Department of Surgery, University of Wisconsin-Madison, 600 Highland Ave., Madison, WI 53705, USA.
出版信息
Int J Mol Sci. 2024 Jan 28;25(3):1609. doi: 10.3390/ijms25031609.
Vascularized composite allotransplantation (VCA) represents a promising reconstructive solution primarily conducted to improve quality of life. However, tissue damage caused by cold-ischemia (CI) storage prior to transplant represents a major factor limiting widespread application. This study investigates the addition of the novel free radical scavenger PrC-210 to UW Organ Preservation Solution (UW Solution) to suppress CI-induced skeletal muscle injury in a rat hind limb amputation model. Lewis rats received systemic perfusion of UW solution +/- PrC-210 (0 mM control, 10 mM, 20 mM, 30 mM, or 40 mM), followed by bilateral transfemoral amputation. Limbs were stored in 40 mL of the same perfusate at 4 °C for 48 h. Muscle punch biopsies were taken at set times over the 48 h cold-storage period and analyzed for caspase-3,7 activity, cytochrome C levels, and qualitative histology. A single 15 s perfusion of PrC-210-containing UW Solution conferred a dose-dependent reduction in CI-induced muscle cell death over 48 h. In the presence of PrC-210, muscle cell mitochondrial cytochrome C release was equivalent to 0 h controls, with profound reductions in the caspase-3,7 apoptotic marker that correlated with limb histology. PrC-210 conferred complete prevention of ROS-induced mitochondrial lysis in vitro, as measured by cytochrome C release. We conclude that the addition of 30 mM PrC210 to UW Solution conferred the most consistent reduction in CI limb damage, and it warrants further investigation for clinical application in the VCA setting.
血管化复合组织同种异体移植(VCA)代表了一种有前途的重建解决方案,主要用于提高生活质量。然而,在移植前冷缺血(CI)储存引起的组织损伤是限制广泛应用的主要因素。本研究探讨了在大鼠后肢截肢模型中,将新型自由基清除剂 PrC-210 添加到 UW 器官保存液(UW 溶液)中,以抑制 CI 诱导的骨骼肌损伤。Lewis 大鼠接受 UW 溶液 +/- PrC-210(0 mM 对照组、10 mM、20 mM、30 mM 或 40 mM)全身灌注,随后进行双侧股骨干截断。肢体在 4 °C 下用 40 mL 相同的灌流液储存 48 h。在 48 h 的冷储存期间的设定时间点采集肌肉活检,并分析 caspase-3、7 活性、细胞色素 C 水平和定性组织学。单次 15 s 灌注含 PrC-210 的 UW 溶液可在 48 h 内降低 CI 诱导的肌肉细胞死亡,呈剂量依赖性。在 PrC-210 的存在下,肌肉细胞线粒体细胞色素 C 的释放与 0 h 对照相当,caspase-3、7 凋亡标志物的显著减少与肢体组织学相关。PrC-210 在体外通过细胞色素 C 释放完全阻止了 ROS 诱导的线粒体溶解。我们得出结论,在 UW 溶液中添加 30 mM PrC210 可最大程度地减少 CI 肢体损伤,值得进一步研究以将其应用于 VCA 环境中。