[Objective] To observe the clinical effects of Zhishang Jiaonang on soft tissue injury of chest wall.[Method] A randomized,positive-controlled trial was adopted,120 cases was divide into trial group(n=90) and the control group(n=30).[Result] 60 cases were cured(66.7%),29 better(32.2%),1 had no effect(1.1%) in trial group;14 cases were cured(46.7%),15 better(50.0%),1 had no effect(3.3%) in control group. With marked difference after statistical dealing,P

0.05). The scaffolds produced no effect on the cell proliferation and had a low cytotoxicity, with chondrocytes tiled and lots of microspikes and matrixes secreted on the surface. Conclusion: The PCL-b-PLLA scaffold has a good compatibility with cells and is suitable for cartilage tissue engineering.

How to reduce immune response is an unprecedented challenge for rAAV gene medicine. Recent studies suggested that lowering dosage of the vector used could reduce immune response caused by rAAV gene medicine. Nevertheless, it would also decrease the transgene expression, leading to failure of gene treatment. It is therefore important to take appropriate steps to maintain high gene expression level and pharmacodynamic, while the dosage of rAAV used is reduced. Here, steps to enhancing gene therapy, such as optimization of the administration, reconstruction of the viral vector and selection of the promoter, are discussed in order to achieve maximum outcome.

Objective To investigate the effects of different doses of dexmedetomidine pretreat-ment on cardiac toxicity of bupivacaine in rats.Methods Forty eight adult male SD rats weighing 250-300 g were randomly divided into 4 groups (n=12):saline control group (group C),dexmedetomi-dine 5 μg/kg group(group D5),dexmedetomidine 10 μg/kg group(group D10)and dexmedetomidine 1 5 μg/kg group(group D1 5 ).A Ⅱ-lead electrocardiogram(ECG)was continuously monitored,the femoral artery was cannulated for direct measurement of MAP and the femoral vein was cannulated for infusion of drugs.Groups D5,D10 and D1 5 were received infusion of dexmedetomidine 5,10 and 1 5μg/kg respectively 1 5 minutes before administration of bupivacaine,while the equal volume of saline was given in group C,then all rats received infusion 0.75% bupivacaine at the rate of 2 mg·kg-1· min-1 until asystole occurred.The doses of bupivacaine and the times of bupivacaine-induced convul-sions,arrhythmia and asystole were recorded respectively,and the myocardial concentration of bupiv-acaine was observed.Results Compared with group C,the doses of bupivacaine and the times of bupivacaine-induced convulsions,arrhythmia and asystole were all increased in groups D5,D10 and D1 5 (P <0.05).Compared with group D5,the above parameters were increased in groups D10 and D1 5 (P <0.05 ).There was no statistical significance of the above parameters between groups D10 and group D1 5.Conclusion Dexmedetomidine pretreatment can raise the threshold toxic dose of bupi-vacaine,delay the time of occurrence of cardiotoxicity of bupivacaine,so that to prevent the cardiac toxicities of bupivacaine in rats,and it produces a dose-dependent protective effect within a certain dose range.

Objective To investigate the role of Rho/Rock signaling pathways in ventilator-in-duced lung injury in rats.Methods Ninety-six male SD rats,weighing 300-350 g,were equally and randomly divided into four groups using a random number table (n =24 each):control group (group C),fasudil group (group F),high tidal volume group (group H)and high tidal volume + fasudil group (group HF).Rats in group C and group F received no mechanical ventilation,rats in group H and group HF were intubated and mechanically ventilated (VT = 40 ml/kg,RR = 40 beats per minutes,FiO 2 =40%)for 4 h.The animals in group F and group HF were given intraperitoneal in-jection of fasudil 10 mg/kg at the time 1 h before mechanically ventilated.Six rats were chosen in each group at the time before ventilation (T0 )and at 4,8,24 h after ventilation (T1-T3 ),and blood sam-ples were taken for determination of the levels of serum tumor necrosis factor-α (TNF-α),IL-6 and IL-10,lungs were removed,bronchoalveolar lavage fluid (BALF)was collected to examine protein content,wet/drying (W/D)ratio was determined,which were then stained with haematoxylin and e-osin and examined under microscope,the pathological changes of lungs were scored.Myeloperoxidase (MPO)activity in lung tissue was determined by spectrophptometry.Protein and gene expression of RhoA and Rock2 in the lung tissue were detected by Western blot and reverse transcription PCR (RT-PCR).Results Compared with group C,the serum TNF-α,IL-6 and IL-10,BALF protein content, W/D ratio,the pathological scores,MPO activity,the expression of RhoA,Rock2 protein and mR-NA were significantly increased in group H and HF at T1-T3 (P <0.05 ).Compared with group H, the serum TNF-αand IL-6,BALF protein content,W/D ratio,the pathological scores,MPO activi-ty,the expression of RhoA,Rock2 protein and mRNA were significantly decreased,and the serum IL-10 was significantly increased in group HF at T1-T3 (P <0.05).Conclusion Fasudil can attenuate ventilator-induced lung injury in rats,and the mechanism may be associated with inhibition of the Rho/Rock signaling pathways reducing the inflammatory response.

Objective To investigate the effects of penehyclidine hydrochloride(PHC)precon-ditioning on hepatic ischemia-reperfusion injury (HIRI)in rats.Methods Fifty-four male Sprague-Dawley rats,weighing 230-250 g,were randomly divided into three groups (n =18 each):sham op-eration group (group S),HIRI group (group HR)and penehyclidine hydrochloride group (group PHC).In group S,the hepatoduodenal ligaments of rats were only pulled and separated,then abdo-mens were closed.In group HR,an atraumatic vascular clip was placed on the vessels blocking the portal venous blood supply to the median and left lateral lobes of the liver for 45 minutes,which re-sulted in approximately 70% rat liver ischemia injury.In group PHC,the rats were treated with 0.45 mg/kg penehyclidine hydrochloride at 30 minutes before the portal venous and hepatic arterial were blocked like group HR.Animals were killed at 2 h (T1 ,n =6),4 h (T2 ,n =6),24 h (T3 ,n =6) after HIRI or sham surgery.Liver tissues and blood samples were taken for analysis.The serum con-centration of ALT and AST were measured as the markers of hepatic functional damage.The TNF-a and IL-1βconcentration were measured by the enzyme linked immunosorbent assay (ELISA)tech-nique.The endothelial nitric oxide synthase (eNOS ) and hypoxia-inducible factor (HIF-1α) expression were measured by immunohistochemical staining.Results Compared with group S,the expressions of ALT,AST,TNF-αand IL-1βin groups HR and PHC increased at T1-T3 (P <0.05), which were similar to the change trend of HIR-1αand eNOS expressions (P <0.05).Compared with group HR,the expression of ALT,AST,TNF-αand IL-1βin group PHC decreased at T1-T3 (P <0.05).Nevertheless expression of HIF-1αand eNOS of groups HR and HPC were increased than that of group S,and experssion of HIF-1αand eNOS of group HPC were increased than that of group HR at T1 and T2 (P < 0.05 ).Conclusion PHC preconditioning can protect the liver from HIRI.The mechanism may be associated with the up-regulation of eNOS and HIF-1α,as well as reducing the in-flammatory response.

A safe and effective targeting viral vector is the key factor for successful clinical gene therapy. microRNA, a class of small, single-stranded endogenous RNAs, act as post-transcriptional regulators of gene expression. The discovery of these kind regulatory elements provides a new approach to regulate gene expression more accurately. In this review, we elucidated the principle of microRNA in regulation of targeting viral vector. The applications of microRNA in the fields of elimination contamination from replication competent virus, reduction of transgene-specific immunity, promotion of cancer-targeted gene therapy and development of live attenuated vaccines were also discussed.
Gene Expression Regulation ; Genetic Therapy ; Genetic Vectors ; genetics ; Humans ; MicroRNAs ; genetics ; Viruses ; genetics ; metabolism

Objective To evaluate the effect of perioperative administration of dexmedetomidine on postoperative ileus after laparocolectomy.Methods Sixty patients scheduled for abdominal surgery were randomly divided into two groups,30 in each group.Group D received dexme-detomidine administeration at a loading dose of 0.6 μg/kg for 10 minutes before induction,followed by an infusion rate of 0.5 μg·kg-1 ·h-1 to 30 min before the end of surgery.The control group re-ceived saline instead of Dex.After the surgery,Group C received intravenous sufentanyl 2 μg/kg, while group D sufentanyl 2 μg/kg combined with Dex 2 μg/kg.Heart rate variability (HRV)were detected before Dex infusion (T0 ),10 minutes after intubation (T1 ), 10 minutes after CO 2 insufflation (T2 ),1 hour after CO 2 insufflation (T3 ),10 minutes after CO 2 desufflation (T4 ),and 10 minutes after extubation(T5 ).The plasma concentrations of epinephrine(E)and norepinephrine (NE)were determined at T0 ,T3 ,T5 ,T7 and T1 0.The recovery of bowel function was evaluated in terms of the first time to fart and intake food.Results Compared with T0 ,HRV of power (TP), high-frequency (HF)power,low-frequency (LF)power and the ratio of LF/HF power were signifi-cantly decreased at T1-T4 in group C and at T1-T5 in group D.The plasma concentrations of E and NE were higher at T3 ,T5 ,T7 and T1 0 in both group C and group D (P <0.05).Compared with T1 ,TP, LF and the ratio of LF/HF were increased at T2-T4 (P <0.05).Compared with group C,TP,LF and the ratio of LF/HF were decreased at T2-T5 ,The plasma concentrations of E and NE were decreased at T3 ,T5 ,T7 and T10 and the time of first flatus was earlier(P <0.05).Conclusion The perioperative ad-ministration of dexmedetomidine during laparocolectomy facilitated the early recovery of bowel func-tion after surgery and decreasede the time of postoperative ileus.

Objective To evaluate the role of C-Jun N-Terminal kinase (JNK) signaling pathway in dexmedetomidine-induced reduction of spinal neurotoxicity induced by lidocaine in rats.Methods Seventy-two adult male Sprague-Dawley rats, weighing 280-320 g, in which intrathecal catheters were successfully implanted without complications, were randomly divided into 6 groups (n =12 each) using a random number table: control group (group C);SP600125 (JNK signaling pathway blocker) group (group SP);dexmedetomidine group (group D);lidocaine group (group L);dexmedetomidine + lidocaine group (group DL);SP600125+lidocaine group (group SPL).Dimethyl sulfoxide (DMSO) 20 μl was injected intrathecally in group C.SP600125 30 μg and 10％ lidocaine 20 μl were injected intrathecally in SP and L groups, respectively.At 20 min after intrathecal injection of 10％ lidocaine, dexmedetomidine 75 μg/kg was injected intraperitoneally in group DL, and SP600125 30 μg was injected intrathecally in group SPL.Dexmedetomidine 75 μg/kg was injected intraperitoneally in group D.The mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) were measured before intrathecal catheters were implanted (T0), before intrathecal administration (T1), and at 4, 8 and 12 h and 1, 2, 3, 4, 5 and 6 days after intrathecal administration (T2-10).At 24 h after intrathecal administration, 6 rats randomly selected from each group were sacrificed.The lumbar segment (L4-5) of the spinal cord was removed for detection of cell apoptosis (by TUNEL) and phosphorylated JNK (p-JNK) expression (by Western blot).The apoptotic index was calculated.Results Compared with group C, no significant change was found in the MWT, TWL, apoptotic index and expression of p-JNK in SP and D groups (P＞0.05), the MWT at T2-8 in group L, at T2-6 in group DL and at T2-5 in group SPL were significantly increased, the TWL at T2-8 in group L, at T2-5 in group DL and at T2-4 in group SPL were prolonged, and the apoptotic index and expression of p-JNK were increased in DL, SPL and L groups (P＜0.05).Compared with group L, the MWT was significantly decreased, and the TWL was shortened at T2-8, and the apoptotic index and expression of p-JNK were decreased in DL and SPL groups (P＜0.05).Conclusion The mechanism by which dexmedetomidine mitigates spinal neurotoxicity induced by lidocaine is related to inhibited activation of JNK signaling pathway in rats.