Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli County, Taiwan.
Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan City, Taiwan.
Pain. 2019 Jul;160(7):1505-1521. doi: 10.1097/j.pain.0000000000001547.
Chemotherapy-induced peripheral neuropathy (CIPN) is a severe adverse effect that occurs secondary to anticancer treatments and has no known preventive or therapeutic strategy. Therapeutic hypothermia has been shown to be effective in protecting against central and peripheral nervous system injuries. However, the effects of therapeutic hypothermia on CIPN have rarely been explored. We induced lower back hypothermia (LBH) in an established paclitaxel-induced CIPN rat model and found that the paclitaxel-induced impairments observed in behavioral, electrophysiological, and histological impairments were inhibited by LBH when applied at an optimal setting of 24°C to the sciatic nerve and initiated 90 minutes before paclitaxel infusion. Lower back hypothermia also inhibited the paclitaxel-induced activation of astroglia and microglia in the spinal cord and macrophage infiltration into and neuronal injury in the dorsal root ganglia and sciatic nerves. Furthermore, LBH decreased the local blood flow and local tissue concentrations of paclitaxel. Finally, in NOD/SCID mice inoculated with cancer cells, the antiproliferative effect of paclitaxel was not affected by the distal application of LBH. In conclusion, our findings indicate that early exposure to regional hypothermia alleviates paclitaxel-induced peripheral neuropathy. Therapeutic hypothermia may therefore represent an economical and nonpharmaceutical preventive strategy for CIPN in patients with localized solid tumors.
化疗引起的周围神经病(CIPN)是一种严重的不良反应,发生于抗癌治疗后,目前尚无已知的预防或治疗策略。治疗性低温已被证明可有效预防中枢和周围神经系统损伤。然而,治疗性低温对 CIPN 的影响很少被探索。我们在已建立的紫杉醇诱导的 CIPN 大鼠模型中诱导下背部低温(LBH),并发现当 LBH 以 24°C 的最佳温度施加于坐骨神经并在紫杉醇输注前 90 分钟开始时,可抑制紫杉醇引起的行为、电生理和组织学损伤。下背部低温还抑制了紫杉醇诱导的脊髓星形胶质细胞和小胶质细胞的激活以及巨噬细胞浸润和背根神经节和坐骨神经中的神经元损伤。此外,LBH 降低了局部血流量和局部组织中的紫杉醇浓度。最后,在接种癌细胞的 NOD/SCID 小鼠中,LBH 远端应用并不影响紫杉醇的增殖抑制作用。总之,我们的研究结果表明,早期暴露于区域性低温可缓解紫杉醇引起的周围神经病。因此,治疗性低温可能代表了局部实体瘤患者 CIPN 的经济且非药物预防策略。
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