脂多糖增强芬太尼诱导离体兔肺动脉舒张反应

目的 探讨阿片受体激动剂芬太尼对正常及内毒素休克时肺动脉血管反应性的影响,从而指导临床用药.方法 应用血管环张力检测技术,观察芬太尼对正常及脂多糖(lipopolysaccharide,LPS)孵育的肺动脉血管环反应性的影响.结果 在正常肺动脉组,芬太尼终浓度(0.1、1、10、100 μmol/L)使去氧肾上腺素(Phenylephedrine,PE)预收缩的肺动脉舒张(EC50=1.699);在LPS孵育的肺动脉组,芬太尼终浓度(1、10、100 μmol/L)使PE预收缩的肺动脉舒张(EC50=2.496),芬太尼终浓度(0.1 μmol/L)对肺动脉并没有影响;LPS组与正常组对照比较,LPS组芬太尼使肺动脉舒张反应Emax增加,在小剂量芬太尼终浓度(0.1、1 μmol/L)时肺动脉的敏感度下降,在大剂量浓度(10、100 μmol/L)时却使其敏感度增加.结论 LPS可以增强芬太尼对肺动脉的最大舒张反应;并且LPS可使小剂量的芬太尼对肺动脉的敏感度下降,大剂量的芬太尼敏感度增加;LPS还可使芬太尼对肺动脉舒张反应的EC50增大.     

舒芬太尼复合丙泊酚全身麻醉在脐血间充质干细胞移植治疗脊髓损伤中的应用

BACKGROUND:Sufentanil and propofol are both found to have good neuroprotective effects on neurological damage in clinical practice. OBJECTIVE:To investigate the effect of propofol combined with sufentanil in umbilical cord blood mesenchymal stem cells transplantation for the treatment of spinal cord injury. METHODS:Sixty-five Wistar rats were selected to make animal models of acute spinal cord injury using Allen’s method. Six hours after modeling, these rats were randomly assigned into combined group (injection of 2×10⁷/L human umbilical cord blood mesenchymal stem cell suspension (0.5 mL) plus injection of 1.0-1.5 mg/kg propofol and 0.5 μg/kg sufentanil via the tail vein), stem cell group (injection of 2×10⁷/L human umbilical cord blood mesenchymal stem cell suspension (0.5 mL) via the tail vein), or control group (injection of 30 μL of LDMEM containing 5% fetal bovine serum). S100β protein level in serum was detected in each group at 15 and 60 minutes after injection. Motor function of rat in each group was assessed by Basso Beattie Bresnahan (BBB) scoring and incline plane test at 1, 2, 4, 6, 8 weeks after modeling. Pathological changes of the spinal cord were observed at 4 weeks after modeling. Expression of vascular endothelial growth factor was detected using western blot assay at 1 and 2 weeks after modeling. RESULTS AND CONCLUSION:After 15 and 60 minutes of intervention, S100β protein level was lowest in the combined group followed by the stem cell and control groups (P < 0.05). At 2, 4, 6, 8 weeks after modeling, scores on the incline plane test and BBB were ranked as follows: combined group > stem cell group > model group (P < 0.05). At 4 weeks after modeling, severe damage to the spinal cord and few nerve fibers were found in the control group; spinal cord hyperplasia and a few of regenerated axons and PKH-26-positive stem cells appeared in the stem cell group; while in the combined group, there were a large amount of PKH-26-positive stem cells and nerve axon-like structures. At 1 and 2 weeks after modeling, the highest protein level of vascular endothelial growth factor was found in the combined group followed by the stem cell group and control group (P < 0.05). To conclude, these findings indicate that propofol and sufentanil in umbilical cord blood mesenchymal stem cell transplantation therapy can promote the recovery of hindlimb function after spinal cord injury, thereby promoting the functional recovery of rats from spinal cord injury.     

布托啡诺对脂多糖诱导离体兔肺动脉反应性变化的影响

Objective To explore the regulatory roles of butorphanol on isolated rabbit pulmonary arteries by lipopolysaccharide(LPS)pre-incubation and assay the protective effect of ketamine on clinic sep tic shock patients.Methods Vascular ring tension detection technique was applied to observe the effect of butorphanol on the normal or lipopolysaccharide incubated pulmonaryvascular.Results In normal group, the final concentration of butorphanol(0.1 μmol,1μmol,10μmol,100μmol)were used to make pretreat ment- phenylephrine(PE)pulmonary artery relaxation.In LPS group,the effect of vasodilation of butor phanol was enhanced.Conclusions LPS can enhance the effect of butorphanol on pulmonary artery relaxa tion reaction.And the direct effect of butorphanol on pulmonary arteries was vasodilation.     

不同浓度依托咪酯对内毒素孵育前后兔离体肺、体动脉环张力的影响

目的研究不同浓度依托咪酯(Etomidate,Eto)对内毒素(Lipopolysaccharide,LPS)孵育前后的离体兔肺动脉和主动脉环张力的影响,为临床脓毒性休克麻醉药选择提供依据。方法制备兔离体肺动脉环和主动脉环,随机分为4组:正常肺动脉环组、LPS孵育后肺动脉环组、正常主动脉环组、LPS孵育后主动脉环组,观察Eto在去氧肾上腺素预收缩动脉环的作用下,Eto剂量分别为1.0、2.0、10.0μmol/L时,对4组肺动脉和主动脉环的张力作用。结果 Eto的给药量为1.0μmol/L时,LPS孵育前后肺、主动脉环张力无明显变化(P>0.05);2.0μmol/L时,正常肺、主动脉环和LPS孵育后主动脉环张力明显上升(P<0.05);10.0μmol/L时,LPS孵育的肺、主动脉环的张力较正常肺、主动脉环明显下降(P<0.05)。结论低浓度Eto收缩机制占主导,但随着浓度增加,Eto引起内毒素孵育后肺动脉舒张的程度比体动脉更明显,可能与高浓度Eto抑制血管收缩功能有关。     

不同浓度依托咪酯对内毒素孵育前后兔离体肺、体动脉环张力的影响

目的研究不同浓度依托咪酯（Etomidate,Eto）对内毒素（Lipopolysaccharide,LPS）孵育前后的离体兔肺动脉和主动脉环张力的影响,为临床脓毒性休克麻醉药选择提供依据。方法制备兔离体肺动脉环和主动脉环,随机分为4组：正常肺动脉环组、LPS孵育后肺动脉环组、正常主动脉环组、LPS孵育后主动脉环组,观察Eto在去氧肾上腺素预收缩动脉环的作用下,Eto剂量分别为1.0、2.0、10.0μmol/L时,对4组肺动脉和主动脉环的张力作用。结果 Eto的给药量为1.0μmol/L时,LPS孵育前后肺、主动脉环张力无明显变化（P〉0.05）;2.0μmol/L时,正常肺、主动脉环和LPS孵育后主动脉环张力明显上升（P〈0.05）;10.0μmol/L时,LPS孵育的肺、主动脉环的张力较正常肺、主动脉环明显下降（P〈0.05）。结论低浓度Eto收缩机制占主导,但随着浓度增加,Eto引起内毒素孵育后肺动脉舒张的程度比体动脉更明显,可能与高浓度Eto抑制血管收缩功能有关。