Effect of complement C1q expression on hepatic ischemia-reperfusion injury in rats

Summary： The effect of the complement Clq expression on total hepatic ischemia-reperfusion （I/R） injury in rats was investigated. Sixty healthy male Sprague Dawley （SD） rats weighing 180-200 g were randomly divided into 5 groups： sham-operation group （S group, n=12）; group of I/R for 1 h （FR 1 h group, n=12）; group of I/R for 3 h （I/R 3 h group, n=12）; group of I/R for 6 h （I/R 6 h group, n=12）; group of UR for 24 h （I/R 24 h group, n=12）. The hepatic I/R model of rats was established, and liver tissues were obtained 1 h, 3 h, 6 h and 24 h after hepatic I/R, respectively. Furthermore, the tissues were stained using hematoxylin-eosin, and the liver injuries of rats were observed using a microscope. The malondialdehyde （MDA） level and superoxide dismutase （SOD） activity in liver tissue were determined Real-time polymerase chain reaction （PCR） and Western blotting were used to detect the expression levels of Clq mRNA and protein, respectively. As compared with the S group, the histopathological changes in I/R 1 h-24 h groups were gradually aggravated with the extension of FR time. As compared with the S group, SOD activity and MDA content in the I/R groups were reduced and increased respec- tively with the extension of UR time （P〈0.01）. Furthermore, the Clq expression at mRNA and protein levels in the I/R groups （especially in the I/R 3 h group） was significantly higher than that in the S group （P〈0.05）. It is suggested that Clq expression may play a principal role in hepatic I/R injury, particularly at the early stage ofperfusion.     

Effect of TLR-4 and HO-1 on acute lung injury induced by hemorrhagic shock in mice

Objective： To examine whether TLR-4 has an ettect on hemorrhage induced changes in lung, and to investigate the change of heme oxygenase-1 （HO-1） on acute lung injury （ALl） induced by hemorrhagic shock in mice.
Methods： Forty-eight male mice, including C3H/HeN mice and C3H/HeJ mice, were randomly divided into sham group （n=12）, hemorrhagic shock group with twelve mice in each phase. Blood pressure （BP） was monitored continuously by attaching carotid artery catheter to a strain gauge pressure transducer/ polygraph. Arterial blood samples were taken for blood gas analysis. A mouse model of non-lethal hemorrhagic shock and resuscitation was used to observe pulmonary myeloperoxidase （MPO） activity and wet/dry weight ratio （W/D）. The expression of HO- 1 was observed by means of RT-PCR and immunohistochemistry. IL-6 and IL-10 in lung tissue homogenate were assayed by enzyme-linked immunosorbent assay （ELISA）. The pulmo- nary pathologic changes were observed under electron microscope and light microscope.
Results： Compared with sham group, the expression of HO- 1 in lung tissue was significantly higher in Hem 24 h and Hem 48 h of C3H/HeN mice （P〈0.01）. The expression of HO-1 mRNA and the levels of IL-6, IL-10 and MPO in lung tissue were markedly increased in Hem 24 h （P〈0.01 or P〈0.05）; Compared with C3H/HeN mice, the expression of HO- 1 rnRNA and the levels of IL-6 and IL-10 in C3H/HeJ mice significantly decreased in Hem 24 h and Hem 48 h （P〈0.01 or P〈O.05）, and the W/D, MPO in C3H/HeJ mice were obvi- ously lower in Hem 24 h （P〈0.05）. The injuries of lung tissues after hemorrhagic shock have been demonstrated by histological examination with electron microscope and light microscope.
Conclusions： TLR-4 and HO-1 might modulate the bal- ance of pro- and anti-inflammatory processes in inflamma- tory reaction of hemorrhagic shock-induced ALl, and the activation of Toll-like receptor might induce the transcrip- tion activity of HO- 1, which may play a k     

盐酸戊乙奎醚对脓毒症小鼠肺血管内皮细胞黏附分子-1和髓过氧化物酶影响

目的:探讨盐酸戊乙奎醚(PHC)对脓毒症小鼠肺组织血管内皮细胞黏附分子-1(VCAM-1)水平、髓过氧化物酶(MPO)活性和β抑制蛋白-1(β-arrestin-1)表达的影响。方法:建立脓毒症小鼠模型,实验动物随机分为假手术组、盲肠结扎穿孔模型组(CLP组)和盐酸戊乙奎醚组(PHC组),每组10只。各组小鼠于造模12h时间点采血检测血乳酸水平,收集肺组织检测VCAM-1水平、MPO活性和β-arrestin-1mRNA的表达。结果:与假手术组比较,CLP组血乳酸值、肺VCAM-1水平和MPO活性升高,β-arrestin-1mRNA表达降低;与CLP组比较,PHC组可降低血乳酸值、肺VCAM-1水平和MPO活性,而增加β-arrestin-1mRNA表达。结论:盐酸戊乙奎醚预处理,可以通过上调β-arrestin-1的表达,从而降低VCAM-1水平和MPO活性,减轻脓毒症小鼠肺损伤。     

氢化泼尼松对全麻女性患者罗库溴铵神经肌肉阻滞效应的影响

目的探讨氢化泼尼松对全麻女性患者罗库溴铵起效时间和恢复时间的影响。方法择期全麻女性患者40例,拟行甲状腺或乳腺手术,年龄18～65岁,ASAⅠ或Ⅱ级,BMI18.5～25kg/m2,随机均分为两组:氢化泼尼松组(H组)和对照组(C组)。H组麻醉诱导前50min给予氢化泼尼松30mg,两组麻醉诱导相似。使用TOF-watch肌松监测仪四个成串刺激模式监测刺激尺神经时TOFr(T4/T1)变化,记录起效时间、TOFr25%及75%的恢复时间(TOF25、TOF75)和TOF25%～75%恢复时间。结果 H组起效时间为(129.30±28.57)s,明显长于C组的(83.55±17.90)s(P<0.05);H组TOF25为(40.95±2.89)min,明显短于C组的(49.55±5.81)min(P<0.05);H组TOF75为(50.65±4.63)min,明显短于C组的(62.50±5.19)min(P<0.05);H组TOF25%～75%恢复时间(9.70±2.83)min,明显短于C组的(12.95±4.65)min(P<0.05)。结论氢化泼尼松能使全麻女性患者罗库溴铵的起效时间延长,而恢复时间缩短。     

电针足三里对严重烫伤致大鼠急性肺损伤的影响

目的 探讨电针足三里对严重烫伤致大鼠急性肺损伤的影响.方法 雄性SD大鼠40只,体重200～250 g,随机分为5组(n=8):对照组、烫伤组、足三里组、非经非穴组和α-银环蛇毒素组(α-BGT组).对照组尾静脉注射生理盐水1 ml.烫伤组、足三里组、非经非穴组和α-BGT组先制备30%总体表面积Ⅲ度烫伤模型,然后烫伤组尾静脉注射生理盐水1 ml;足三里组于双侧足三里穴垂直进针7 mm,给予脉冲电流(电压3V,电流2ms,频率3 Hz)持续刺激12 mim,间隔8 h刺激1次,持续2 d;非经非穴组于双侧足三里穴旁5mm处给予脉冲刺激,方法同足三里组;α-BGT组尾静脉注射α-BGT 1.0 μg/kg,再于双侧足三里穴给予脉冲刺激,方法同足三里组.各组处理结束后,处死大鼠,取肺组织,光镜下观察病理学结果,电镜下观察超微结构,采用ELISA法测定肺组织高迁移率族蛋白B1(HMGBl)含量,采用免疫组化法测定HMGBl蛋白表达,采用RT-PCR法测定HMGBl mRNA表达.结果 烫伤组肺组织光镜下可见肺泡壁崩解,泡内大量渗出液,间质水肿、肥厚和增生,伴大量炎性细胞浸润;电镜下可见细胞核形态不规则,核膜僵硬,部分凸凹不平和核溶解,胞质内板层小体明显减少,肺组织病理损伤程度较对照组减轻.与对照组比较,烫伤组、非经非穴组和α-BGT组肺组织HMGBl含量升高,HMGBl蛋白及其mRNA的表达上调(P<0.05),足三里组各指标差异无统计学意义(P>0.05);与烫伤组比较,足三里组肺组织HMGBl含量降低,HMGBl蛋白及其mRNA的表达下调,非经非穴组和α-BGT组肺组织HMGBl mRNA表达下调(P<0.05);与足三里组比较,非经非穴组和α-BGT组肺组织HMGBl含量升高,HMGBl蛋白及其mRNA的表达上调(P<0.05).结论 电针足三里可减轻严重烫伤致大鼠急性肺损伤,其机制与激活含α7亚基N型胆碱能受体介导的胆碱能抗炎通路,抑制肺组织HMGBl的表达有关.     

乳化异氟烷对兔心肌缺血-再灌注损伤的作用

目的 探讨乳化异氟烷预处理对心肌缺血再灌注损伤的保护作用.方法 雄性新西兰兔32只,体重2.0～2.5 kg,随机分成4组(n=8):心肌缺血再灌注组(对照组,C组)、脂肪乳组(L组)、异氟烷组(I组)和乳化异氟烷组(EI组).每组均缺血1 h,再灌注3 h.实验结束后测定血清磷酸肌酸激酶(CK)和乳酸脱氢酶(LDH)活性,电镜观察心肌组织超微结构的变化.所有数据以均数±标准差(-x±s)表示,采用单因素方差分析,并用Dunnett检验进行两两比较,差异有统计学意义(P＜0.05).结果 与C组比较,I组和EI组血清CK和IDH降(P＜0.05),而L组无明显变化.电镜下C组和L组线粒体水肿,破坏明显,而I组和EI组线粒体损伤较轻.结论 乳化异氟烷预先给药体对兔心肌缺血再灌注损伤有明显的保护作用.     

手术/麻醉对老龄术后谵妄小鼠线粒体动力学的影响

目的:探讨手术/麻醉对老龄术后谵妄(POD)小鼠海马线粒体分裂/融合动力学的影响.方法:健康雌性C57BL/6小鼠36只,18月龄,体质量35～45g,采用随机数字表达法分为2组(n=18):对照组(C组)和麻醉/手术组(S组).S组吸入1.4％异氟醚麻醉下行腹部手术以制备POD模型.C组小鼠置于100％O2中,不接受...     

术后谵妄大鼠血脑脊液屏障的变化

目的:评价术后谵妄大鼠血脑脊液屏障的变化。方法:SPF级健康雌性SD大鼠147只,3月龄,体重240～300 g,采用随机数字表法分成3组( n＝49)：对照组(C组)、单纯麻醉组(A组)和术后谵妄组(P组)。C组大鼠不接受麻醉和手术处理,A组大鼠接受1.4%异氟烷麻醉2 h处理,P组大鼠在1.4%异氟烷麻...     

骨髓间充质干细胞在慢性疼痛治疗中的研究进展

慢性疼痛的发病率逐年升高,严重影响了患者的生活。由于慢性疼痛的发生机制复杂,病因多样,探索新的慢性疼痛治疗措施成为神经科学领域的一大热点。最近的研究表明,骨髓间充质干细胞（BMSCs）能在炎症性疼痛、神经病理性疼痛和癌症性疼痛等慢性疼痛动物模型中产生强大的镇痛作用。本文就骨髓间充质干细胞在慢性疼痛治疗中的研究进展作一综述,并讨论骨髓间充质干细胞在慢性疼痛治疗中的作用前景及存在的问题,为慢性疼痛的治疗提供新的方向。     

高龄患者结肠癌根治术的麻醉与围术期管理

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