摘要
目的 观察硬膜外注射不同剂量的布托啡诺或舒芬太尼对骨癌痛大鼠脊髓细胞和亚细胞结构及血清髓鞘碱性蛋白(myelin basic protein,MBP)的影响. 方法 SD雌性未交配大鼠,体重150~180 g,于L1~L2间隙行硬膜外置管,置管成功3d后,取无运动障碍的大鼠,行假手术及建立胫骨癌痛模型,共64只,按随机数字表法分为8组(每组8只):假手术组(C组)、生理盐水(NS)组(N组)、布托啡诺3组(B1组、B2组、B3组)、舒芬太尼3组(S1组、S2组、S3组).癌痛模型建立后第10~14天,C组和N组硬膜外注射NS 30μl,B1组、B2组、B3组分别硬膜外注射30μl布托啡诺25、50、100 μg(溶于NS),S1组、S2组、S3组硬膜外分别注射30μl舒芬太尼1、2、4μg(溶于NS),1次/d.动物在给药前1 h(T0)及末次给药后6 h(T1)、24 h(T2)、72 h(T3)采血,检测血清MBP.T3时取脊髓腰膨大,在光镜和电镜下观察其神经形态和细胞凋亡的变化. 结果 各时间点各组血清MBP差异无统计学意义(P>0.05).与C组、N组、B1组、B2组、S1组、S2组、S3组比较,B3组光镜下可见的尼氏体阳性表达细胞数量减少[(37.6±3.7)、(39.3±3.6)、(36.1±3.1)、(37.3±2.9)、(38.4±2.9)、(35.7±3.3)、(35.3±3.2)比(22.3±2.7),P<0.05],Bcl-2蛋白表达减少的阳性细胞数明显增加[(9.8±1.5)、(10.1±1.3)、(12.5±1.7)、(13.1±2.2)、(11.5±1.8)、(12.6±1.9)、(13.3±2.3)比(29.8±5.6),P<0.05],Bax蛋白的表达明显增加[(8.6±2.2)、(9.3±1.6)、(10.1±1.7)、(9.9±1.9)、(8.4±2.1)、(10.7±1.3)、(11.3±1.8)比(31.8±5.3),P<0.05],凋亡细胞明显增多[(6.6±2.3)、(6.3±2.6)、(7.1±1.7)、(7.9±1.3)、(8.4±1.1)、(9.7±1.3)、(8.3±1.7)比(15.2±2.3),P<0.05];电镜下可见B3组脊髓髓鞘数量减少,结构破坏. 结论 布托啡诺50μg或舒芬太尼4 μg硬膜外连续给药对骨癌痛大鼠脊髓细胞和亚细胞结构、细胞凋亡及MBP无影响,但布托啡诺100 μg连续硬膜外给药会使骨癌痛大鼠脊髓神经细胞内尼氏体减少、细胞凋亡增加、髓鞘结构破坏,但对MBP没有影响.
Objective To observe the effect of epidural injection with different dose of butorphanol or sufentanil on the rats' spinal cord morphology and serum myelin basic protein (MBP) in bone cancer pain models.Methods APE-530 catheter was inserted into the epidural space of all male Sprague-Dawley rats (not mated,weighting 150-180 g) at L1-L2 level.Three days after operation,64 rats without any motor dysfunction were randomly divided into eight groups (n=8):sham operation group (group C),normal saline group (group N),butorphanol groups(group B1,B2,B3) and sufentanil groups(group S1,S2,S3).Bone cancer pain model was constructed in group N,B and S when rats in group C were sham operated.Rats in group C and N were epidurally injected NS 30 μl each,and rats in group B1,B2 and B3 were respectively epidurally injected butorphanol 25,50,100 μg (all diluted to 30 μl with NS),when rats in group S1,S2 and S3 were respectively epidurally injected sufentanil 1,2,4 μg (all diluted to 30 μl with NS) in time per day 10-14 days after modeling.These serum MBP of rats were measured before injection (T0),6 h(T1),24 h(T2) and 72 h (T3) after the last injection by ELISA examination.At T3,took out the lumbar enlargement of the spinal cord,and detected the H-E,Bcl-2,Bax,tunel and electron microscopy.Results The content of serum MBP did not show any significant difference between groups(P〉0.05).Compared with group C,N,B1,B2,S1,S2 and S3,the number of nissl body in group B3 decreased[(37.6±3.7),(39.3±3.6),(36.1±3.1),(37.3±2.9),(38.4±2.9),(35.7±3.3) and (35.3±3.2) to (22.3±2.7)(P〈0.05)],the number of cells with Bcl-2 in group B3 decreased obviously[(9.8±1.5),(10.1±1.3),(12.5±1.7),(13.1±2.2),(11.5±1.8),(12.6±1.9),(13.3±2.3) to (29.8±5.6)(P〈0.05)],the expression of the Bax in group B3 increased obviously[(8.6±2.2),(9.3±1.6),(10.1±1.7),(9.9±1.9),(8.4±2.1),(9.7±1.3),(11.3±1.8) to (31.8±5.3)(P〈0.05)],the number of the apoptosis neurons in group B3 increased obviously[(6.6±2.3),(6.3±2.6),(7.1± 1.7),(7.9±1.3),(8.4±1.1),(9.7±1.3),(8.3±1.7) to (15.2±2.3)(P〈0.05)].The structure of myelin in group B3 was destroyed but not demyelinated in the electron microscope.Conclusions Repeated epidural injection of butorphanol 50 μg or sufentanil 4 μg have no effect on spinal cord cells and subcellular structures of rats and on the apoptosis of spinal cord in bone cancer pain models,while repeated epidural injection of butorphanol 100 μg could decrease the content of nissl bodies but increase the apoptosis in spinal cord cells and destroy the structure of myelin.Myelin basic protein has no change in all groups.
出处
《国际麻醉学与复苏杂志》
CAS
2016年第6期494-498,529,共6页
International Journal of Anesthesiology and Resuscitation
基金
江苏省卫生厅医学科研招标立项课题(H201355)
关键词
布托啡诺
舒芬太尼
骨癌痛
硬膜外注射
脊髓
细胞结构
髓鞘碱性蛋白
Butorphanol
Sufentanil
Bone cancer pain
Epidural injection
Spinal cord
Cell structure
Myelin basic protein