检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]山西医科大学第二医院麻醉科,太原030001
出 处:《中华急诊医学杂志》2011年第1期35-38,共4页Chinese Journal of Emergency Medicine
基 金:国家自然科学基金资助项目(30471656)
摘 要:目的 观察吗啡、曲马多预先给药对急性心肌缺血大鼠背根神经节内P物质mRNA(SP mRNA)和降钙素基因相关肽mRNA(CGRPmRNA)表达的影响.方法 健康成年雄性SD大鼠24只,体质量270~300 g,随机(随机数字法)分为四组(n=6):假手术组(S组)、单纯冠状动脉结扎组(Ⅰ组)、吗啡干预冠状动脉结扎组(M组)和曲马多干预冠状动脉结扎组(T组).S组大鼠开胸后在冠状动脉左前降支下穿线不结扎;Ⅰ组大鼠开胸后结扎冠状动脉左前降支;M组和T组大鼠经尾静脉分别注射吗啡1.25 mg·kg^-1、曲马多12.5 mg·kg^-1,15 min后结扎冠状动脉左前降支.各组在穿线或结扎冠状动脉左前降支3 h后开胸快速取脊髓胸段(T1-5)背根神经节采用反转录-聚合酶链反应法(RT-PCR)观察各组大鼠背根神经节内SPmRNA和CGRPmRNA的表达.应用单因素方差分析进行统计学分析.结果 Ⅰ组大鼠背根神经节内SPmRNA(0.93±0.02),α-CGRP mRNA(0.98±0.02)和β-CGRP mRNA (0.83±0.02)的表达均较S组(0.84±0.04),(0.86±0.01),(0.45±0.03)明显上调(P<0.05);M组和T组SP mRNA(0.88±0.03),(0.88±0.04),α-CGRP mRNA(0.90±0.02),(0.90±0.01)和β-CGRP mRNA(0.67±0.02),(0.66±0.01)的表达均明显低于Ⅰ组(P<0.05),但仍高于S组(P<0.05);M组和T组二者间比较差异无统计学意义(P>0.05).结论 吗啡、曲马多预先给药可降低急性心肌缺血大鼠背根神经节内SP mRNA和CGRP mRNA的表达.Objective To investigate the effects of morphine and tramadol pre-emptive use on the expressions of substance P mRNA (SPmRNA) and calcitonin gene-related peptide mRNA (CGRPmRNA) in dorsal root ganglia (DRG) following acute myocardial ischemia in the rats. Method Twenty-four adult male SD rats weighing 270 to 300 g were randomly (random number) divided into four groups (n = 6, in each): group Ⅰ(sham operation), group Ⅱ (myocardial ischemia), group Ⅲ (morphine pre-emptive use) and group Ⅳ (tramadol pre-emptive use). The left anterior descending branch of coronary artery was occluded (CAO) for 3 hours in rats of group Ⅱ and Ⅳ.In group Ⅲ morphine 1.25 mg·kg^-1 was injected through caudal vein 15 minutes before CAO.In group Ⅳ,tramadol 12.5 mg·kg^-1 was daministered via caudal vein 15 minutes before CAO.In 3 hours after myocardial ischemia, the tissue of DRG (T1-5) were taken for detecting the expressions of SPmRNA and CGRPmRNA by using RT-PCR. One-way ANOVA was used for statistical analysis. Results In the tissue of DRG, the expressions of SPmRNA(0.93±0.02) ,α-CGRP mRNA(0.98±0.02) and β-CGRP mRNA(0.83 ± 0.02)were up-regulated in group Ⅱ compared with those in group Ⅰ (0.84±0.04),(0.86±0.01),(0.45±0.03) (P 〈0.05),and decreased markedly in group Ⅲ (0.88 ± 0.03) ,(0.90 ± 0.02), (0.67 ± 0.02) (P 〈 0.05) and group Ⅳ (0.88±0.04) ,(0.90 ± 0.01),(0.66±0.01) (P 〈 0.05), but showed no difference between group Ⅲ and Ⅳ (P 〉 0.05). Conclusions Morphine and tramadol pre-emptive use can significantly inhibit the expressions of SPmRNA and CGRPmRNA in rat's dorsal root ganglia after CAO.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.38