Objective: To investigate the antagonistic effect of diallyl sulfide (DAS) against peripheral nerve injury induced by n-hexane in rats. Methods: A total of 68 adult male Wistar rats were selected, among which 50 were randomly selected and divided into blank control group, DAS control group (100 mg/kg·bw) , n-hexane model group, low-dose DAS intervention group (50 mg/kg·bw) , and high-dose DAS intervention group (100 mg/kg·bw) . A rat model of peripheral nerve injury was established by n-hexane exposure, and the rats were treated with DAS at different doses. The changes in pyrrole adducts and behavior were observed, a metabolic analysis was performed for serum pyrrole adducts, and the intervention effect was evaluated. The remaining 18 rats were randomly assigned to the n-hexane model group, the low-dose DAS intervention group, and the high-dose DAS intervention group, with 6 rats in each group, as satellite groups used for the toxicokinetic analysis of serum pyrrole adducts. Results: Compared with the blank control group, the n-hexane model group and low-and high-dose DAS intervention groups had a significant reduction in body weight since week 2 (P<0.01) . Compared with the n-hexane model group at the end of the experiment at week 7, the high-dose DAS intervention group had a significantly higher body weight (P<0.05) , while there was no significant difference in body weight between the n-hexane model group and the low-dose DAS intervention group (P>0.05) . The n-hexane model group developed gait abnormality at week 2 of poisoning, while the low-and high-dose DAS intervention groups developed gait abnormality at weeks 3 and 5 of poisoning, respectively. At the end of the experiment, the n-hexane model group and the low-and high-dose DAS intervention groups had a significantly higher gait score than the blank control group (P<0.01) . At the end of the experiment, the n-hexane model group and the low-dose DAS intervention group had significantly shorter latency in rotarod test than the blank control group (P<0.01) , while there was no significant difference in latency between the DAS control group and the high-dose DAS intervention group (P>0.05) . Compared with the n-hexane model group, the low-and high-dose DAS intervention groups had a significant increase in latency in rotarod test (P<0.01) . Compared with blank control group, the n-hexane model group and the low-dose DAS intervention group had a significant increase in mean nerve conduction velocity (P<0.01) , while there was no significant difference between the blank control group and the DAS control group or high-dose DAS intervention group (P>0.05) , and compared with the n-hexane model group, the low-and high-dose DAS intervention groups had a significant increase in nerve conduction velocity (P<0.01) . Compared with the blank control group at the end of the experiment at week 7, the n-hexane model group and the low-and high-dose DAS intervention groups had significant increases in the concentration of pyrrole adducts in serum, urine, and hair (P<0.01) , while there was no significant difference between the blank control group and the DAS control group (P>0.05) , and the high-dose DAS intervention group had a significantly lower concentration of pyrrole adducts in serum, urine, and hair than the low-dose DAS intervention group (P<0.05) . Serum pyrrole adducts reached the peak level at 9-12 hours and then started to decrease. Compared with the n-hexane model group, the high-and low-dose DAS intervention groups had a significantly shorter half-life period of serum pyrrole adducts (P<0.01) . Compared with the n-hexane model group, the high-and low-dose DAS intervention groups had a significant reduction in the area under the curve of serum pyrrole adducts (P<0.05) . Conclusion: DAS can antagonize peripheral nerve injury induced by n-hexane.
目的： 探讨二烯丙基一硫（DAS）对正己烷中毒大鼠周围神经损伤的干预效果。 方法： 成年雄性Wistar大鼠68只，随机选取50只分为5组：空白对照组、DAS对照组（100 mg/kg·bw）、正己烷模型组、DAS低剂量干预组（50 mg/kg·bw）、DAS高剂量干预组（100 mg/kg·bw）。正己烷染毒建立大鼠周围神经损伤模型，使用不同剂量的DAS进行干预，监测大鼠的行为学改变及吡咯加合物变化，并进行血清吡咯加合物的代谢分析，评价干预效果。另选18只大鼠随机分配到正己烷模型组、DAS低剂量干预组、DAS高剂量干预组中，每组各6只，作为卫星组，于第4周进行血清吡咯加合物的代谢动力学研究。 结果： 从第2周开始，与空白对照组比较，正己烷模型组、DAS低剂量干预组、DAS高剂量干预组大鼠体重均降低，差异均有统计学意义（P<0.01）。在第7周实验终点，与正己烷模型组比较，DAS高剂量干预组体重增加（P<0.05），DAS低剂量干预组体重差异无统计学意义（P>0.05）。正己烷模型组、DAS低剂量干预组、DAS高剂量干预组大鼠依次在染毒第2、3、5周开始出现步态异常。在实验终点，与空白对照组比较，正己烷模型组、DAS低剂量干预组、DAS高剂量干预组大鼠步态评分均增高（P<0.01），正己烷模型组、DAS低剂量干预组大鼠转棒潜伏期均缩短（P<0.01）。与DAS对照组比较，DAS高剂量干预组大鼠转棒潜伏期差异无统计学意义（P>0.05）。与正己烷模型组比较，DAS低剂量和DAS高剂量组大鼠转棒潜伏期均增加，差异均有统计学意义（P<0.01）。与空白对照组比较，正己烷模型组、DAS低剂量干预组大鼠的平均神经传导速度均提高，差异均有统计学意义（P<0.01）。与空白对照组比较，DAS对照组和DAS高剂量干预组神经传导速度差异均无统计学意义（P>0.05）。与正己烷模型组比较，DAS低剂量和高剂量干预组大鼠神经传导速度均提高，差异均有统计学意义（P<0.01）。在第7周实验终点，与空白对照组比较，正己烷模型组、DAS低剂量干预组、DAS高剂量干预组大鼠血清、尿、毛发吡咯加合物浓度均升高（P<0.01），DAS对照组大鼠血清、尿、毛发吡咯加合物浓度差异均无统计学意义（P>0.05）。在第7周实验终点，与DAS低剂量干预组比较，DAS高剂量干预组大鼠血清、尿、毛发吡咯加合物浓度均降低，差异均有统计学意义（P<0.05）。大鼠血清吡咯加合物在9~12 h达到峰值，之后开始下降。与正己烷模型组比较，DAS低剂量和高剂量干预组大鼠血清吡咯加合物的半衰期变短、曲线下面积减少，差异均有统计学意义（P<0.05）。 结论： DAS可能拮抗正己烷引起的大鼠周围神经病变。.
Keywords: Diallyl sulfide; N-hexane; Nerve injury; Peripheral nerves; Poisoning; Pyrrole adducts; Rats.