CAJ | 학술논문

目的观察大鼠鞘内注射盐酸利多卡因神经损伤后脊髓钙/钙调蛋白依赖性蛋白激酶Ⅱ(calcium/calmodulin dependent protein kinase Ⅱ,CaMK Ⅱ)的表达变化.方法鞘内成功置管的雄性SD大鼠48只,体质量(230±20)g,用随机数字表法将大鼠分成4组(n=12,其中行为学检测大鼠8只,免疫印迹实验大鼠4只):正常组(C组)、假手术组(S组)、溶媒组(D组)、10％利多卡因组(L组).分别于给药前、给药后2h、4h、8h、12h、1d、2d、3d、4d、5d等时点检测大鼠机械缩腿阈值(Mechanical withdrawal threshold,MWT)和热缩腿潜伏期(thermal withdrawal latency,TWL).并于给药后12h取4只大鼠脊髓腰膨大,免疫印迹检测大鼠脊髓腰膨大CaMKⅡ的表达.结果 C组、S组和D组大鼠MWT的基础值分别为(11.2±3.1)g、(11.8±2.2)g和(11.4 ±2.4)g,其余各时间点与基础值比较差异无统计学意义(n=8,P＞0.05)；L组大鼠MWT在给药后2h、4h、8h、12h、1d、2d、3d、4d时点显著增加(n=8,P＜0.01),分别为(22.0±6.6)g、(22.2 ±5.3)g、(20.5 ±5.8)g、(18.5 ±4.3)g、(16.7 ±3.2)g、(15.2 ±3.1)g、(15.5 ±3.5)g、(13.7±2.4)g.与MWT结果相似,C组、S组和D组大鼠TWL的各时间点比较差异无统计学意义(n=8,P＞0.05)；L组大鼠TWL在给药后2h、4h、8h、12h、1d、2d、3d时点显著增加(n=8,P＜0.01).C组、S组、D组及L组大鼠脊髓CaMK Ⅱ表达分别为0.17±0.03、0.16 ±0.03、0.19 ±0.05、0.42 ±0.11,L组大鼠表达显著增加(n=4,P＜0.01).结论鞘内注射盐酸利多卡因可致脊髓CaMK Ⅱ表达显著增加,提示CaMK Ⅱ可能与盐酸利多卡因所致的神经损伤有关.
목적 관찰대서초내주사염산리다잡인신경손상후척수개/개조단백의뢰성단백격매Ⅱ(calcium/calmodulin dependent protein kinase Ⅱ,CaMK Ⅱ)적표체변화.방법 초내성공치관적웅성SD대서48지,체질량(230±20)g,용수궤수자표법장대서분성4조(n=12,기중행위학검측대서8지,면역인적실험대서4지):정상조(C조)、가수술조(S조)、용매조(D조)、10％리다잡인조(L조).분별우급약전、급약후2h、4h、8h、12h、1d、2d、3d、4d、5d등시점검측대서궤계축퇴역치(Mechanical withdrawal threshold,MWT)화열축퇴잠복기(thermal withdrawal latency,TWL).병우급약후12h취4지대서척수요팽대,면역인적검측대서척수요팽대CaMKⅡ적표체.결과 C조、S조화D조대서MWT적기출치분별위(11.2±3.1)g、(11.8±2.2)g화(11.4 ±2.4)g,기여각시간점여기출치비교차이무통계학의의(n=8,P＞0.05)；L조대서MWT재급약후2h、4h、8h、12h、1d、2d、3d、4d시점현저증가(n=8,P＜0.01),분별위(22.0±6.6)g、(22.2 ±5.3)g、(20.5 ±5.8)g、(18.5 ±4.3)g、(16.7 ±3.2)g、(15.2 ±3.1)g、(15.5 ±3.5)g、(13.7±2.4)g.여MWT결과상사,C조、S조화D조대서TWL적각시간점비교차이무통계학의의(n=8,P＞0.05)；L조대서TWL재급약후2h、4h、8h、12h、1d、2d、3d시점현저증가(n=8,P＜0.01).C조、S조、D조급L조대서척수CaMK Ⅱ표체분별위0.17±0.03、0.16 ±0.03、0.19 ±0.05、0.42 ±0.11,L조대서표체현저증가(n=4,P＜0.01).결론 초내주사염산리다잡인가치척수CaMK Ⅱ표체현저증가,제시CaMK Ⅱ가능여염산리다잡인소치적신경손상유관.
Objective To observe the expression of calcium/calmodulin dependent protein kinase Ⅱ (CaMK Ⅱ) in the spinal cord of the rats followed lidocaine hydrochloride intrathecal injection.Methods 48 male SD rats weight(230 ± 20) g,after intrathecal indwelling catheter,were randomly divided into four groups (n =12,8 rats for behavioral detection and 4 rats for western blotting):normal group (C group),sham group (S group),DMSO group (D group),10％ lidocaine group (L group).Mechanical withdrawal threshold(MWT) and thermal withdrawal latency(TWL) were detected before and after 2 h,4 h,8 h,12 h,1 d,2 d,3 d,4 d and 5 d with drug treatment.Intumescentia lumbalis of the spinal cord were collected to measure the expression of CaMK Ⅱ with western blotting after drug treatment for 12 h.Results The based MWT of the rats in C,S and D group were (11.2 ± 3.1) g,(11.8 ± 2.2) g and (11.4 ± 2.4) g respectively.There were no differences among the every time points (n=8,P＞0.05).The MWT of the rats in L group significantly increased at 2 h,4 h,8 h,12 h,1 d,2 d,3 d and 4 d after treatment with lidocaine hydrochloride,and the data were (22.0 ± 6.6) g,(22.2 ± 5.3) g,(20.5 ±5.8)g,(18.5 ±4.3)g,(16.7 ±3.2)g,(15.2 ±3.1)g,(15.5 ±3.5)g,(13.7 ±2.4)g respectively (n=8,P＜0.01).TWL had no difference among the rats in C,S,and D group(n=8,P＞0.05).The TWL of the rats in L group significantly increased at 2 h,4 h,8 h,12 h,1 d,2 d and 3 d after treatment with lidocaine hydrochloride(n =8,P＜ 0.01).The expression of CaMK Ⅱ of the rats in C group,S group,D group and L group were 0.17 ± 0.03,0.16 ± 0.03,0.19 ± 0.05,0.42 ± 0.11,and significantly upregulated in L goup (n =4,P ＜ 0.01).Conclusion Lidocaine hydrochloride intrathecal injection can increase the expression of the CaMK Ⅱ in the spinal cord of the rats.Those indicate that CaMK Ⅱ may be involved with the nerve damage induced by lidocaine hydrochloride.