鞘内注射硫酸镁对骨癌痛小鼠痛行为的影响  被引量:4

Effect of intrathecal injection of magnesium sulfate on pain behavior in bone cancer pain mouse

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作  者:孙玉娥[1] 马正良[1] 郑亚国[1] 张娟[1] 杨许丽[1] 朱洁[1] 顾小萍[1] 

机构地区:[1]南京大学医学院附属鼓楼医院麻醉科,南京210008

出  处:《中华行为医学与脑科学杂志》2012年第4期306-310,共5页Chinese Journal of Behavioral Medicine and Brain Science

基  金:基金项目:国家自然科学基金项目(81070892);国家自然科学基金项目(81171047);江苏省自然科学基金资助项目(BK2009031);江苏省自然基金项目(BK2010105);江苏省麻醉学重点学科项目(XK201140)

摘  要:目的观察鞘内注射硫酸镁(MgSO。)对骨癌痛小鼠痛行为的影响。方法雄性C3H/HeJ小鼠56只,8~10周龄,体质量18~22g,随机分为7组(n=8):假手术Sham组(s组)、癌痛模型对照Con—trol组(C组)和MgSO。及吗啡Treat组(T1—T5组)。C组和T组(T1-T5组)小鼠右侧股骨远端骨髓腔接种含有2×10^5个NCTC2472纤维肉瘤细胞的20μlα—MEM,建立骨癌痛模型;S组小鼠骨髓腔注入不含NCTC2472细胞的20μlα-MEM。在接种肿瘤细胞后第14天s组和C组鞘内注射5μl人工脑脊液,T1-T5组分别鞘内注射溶于人工脑脊液的MgS0414.4μg/5μl、43.2μg/5μl、86.4μg/5μl、吗啡0.36μg/5μl、MgS0414.4μg-吗啡0.36μg/5μl。各组于给药前0.5h及给药后的0.5h、2h、4h、8h检测小鼠的自发抬足次数、机械性缩足反射阈值(PWMT)和热缩足反射潜伏期(PWTL)。结果鞘内给予MgSO4 14.4μg、吗啡0.36μg对骨癌痛小鼠痛行为无影响,鞘内给予MgsO4 43.2μg、86.4μg能剂量依赖性减轻小鼠痛行为反应,同时MgSO。14.4μg.吗啡阈下剂量0.36μg组合也减轻小鼠痛行为反应,给药后0.5h各组小鼠自发抬足次数[(10.08±1.66)次、(7.35±1.36)次、(10.54±1.32)次]比C组[(13.05±2.06)次]降低,PWMT[(0.81±0.22)g、(1.33±0.19)g、(0.93±0.26)g、PWTLI(10.57±1.53)s、(13.12±1.71)s、(11.46±1.83)SI比C组[(0.42±0.23)g、(8.87±1.27)s]升高,差异有统计学意义(P〈0.05)。作用2h达到高峰,维持到4h左右,8h后基本消失。结论鞘内注射MgSO4能够剂量依赖性改善骨癌痛小鼠的痛行为;同时MgSO。可增强阈下剂量吗啡的镇痛作用。Objective To investigate the effect of intrathecal injection of magnesium sulfate ( MgSO4 ) on pain behavior in mouse with bone cancer pain. Methods 56 male 8-10 week old C3H/HeJ mice weighing 18-22 g were divided randomly into 7 groups ( n = 8 ) : sham group ( S group) , control group ( C group) and MgSO4 plus morphine treat groups( T1-T5 group). Group C and T mice were induced bone cancer pain models by intra-right- femur inoculation of osteolytic NCTC2472 cells while group S were injected of only α-MEM. On the 14d after inoc- ulation, group S and C received intrathecal injection of artificial cerebrospinal fluid 5 μl, while group T1-T5 re- ceived intrathecal injection of MgSQ 14.4 μg, 43.2 μg, 86.4μg, morphine 0.36 μg, MgS04 14.4 μg-morphine 0.36μg, which were dissolved in 5μl artificial cerebrospinal fluid. Mice received pain behavior tests including quantification of spontaneous flinches, paw withdrawal mechanical threshold (PWMT) and paw withdrawal thermal latency (PWTL) at 0.5h before and 0.5h,2h,4h,8h after administration. Results Treatment with MgSO4 ( 14.4 μg), morphine (0.36 μg) have no effect on bone cancer pain, while treatment with MgSO4 (43.2 μg, 86. 4 μg)can dose-dependently reverse quantification of spontaneous flinches ,mechanical allodynia and thermal hyper- algesia which were induced by inoculation as well as MgSO4 14.4 μg-morphine 0.36μg. At 0.5 h after administra- tion,the quantification of spontaneous flinches of the three groups( ( 10.08 ± 1.66), (7.35 ± 1.36), ( 10.54 ±1. 32 ) ) were decreased when compared with control group (13.05 ±2.06) ,PWMT ( (0.81 ±0.22) g; (1.33 ± 0. 19 ) g ; (0.93 ± 0.26) g), PWTL( ( 10.57±± 1.53 ) s ; ( 13.12 ±1.71 ) s ; ( 11.46 ± 1.83 ) s ) were increased when compared with control group ( ( 0.42± 0.23 ) g, ( 8.87 ±1.27 ) s) (P〈 0.05 ). The effect reached maximum level at 2h,lasted for at least 4h and disappeared at 8h. Conc

关 键 词:骨癌痛 硫酸镁 吗啡 行为学 小鼠 

分 类 号:R338.3[医药卫生—人体生理学]

 

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