Objective    To explore an effective and safe drainage method, by comparing open thoracic drainage and conventional thoracic drainage for lung cancer patients after thoracoscopic pneumonectomy. Methods    The clinical data of 147 patients who underwent thoracoscopic pneumonectomy from January 2015 to March 2018 in our hospital were retrospectively analyzed, including 128 males and 19 females. Based on drainage methods, they were divided into an open drainage group (open group) and a conventional drainage group (regular group). The incidence of postoperative complications, chest tube duration, drainage volume at postoperative 3 days, postoperative hospital stay, hospitalization cost and quality of life were compared between the two groups. Results    Postoperative complication rate was lower in the open group than that in the regular group (10.20% vs. 23.47%, P=0.04). The chest tube duration of the open group was longer compared with the regular group (5.57±2.36 d vs. 3.22±1.23 d, P<0.001). The drainage volume at postoperative 3 days was less in the regular group. In the open group, ambulation was earlier, thoracocentesis was less and re-intubation rate was lower (all P<0.001). The postoperative hospital stay in the regular group was significantly longer than that in the open group (8.37±2.56 d vs. 6.35±1.87 d, P<0.001) and hospitalization cost was significantly higher (66.2±5.4 thousand yuan vs. 59.6±7.3 thousand yuan, P<0.001). Besides, quality of life in 1 and 3 months after operation was significantly better than that in the open group (P<0.001). Conclusion    Compared with the regular chest drainage, the effect of open thoracic drainage is better, which can help reduce postoperative complications, shorten the length of hospital stay, reduce the hospitalization cost and improve the quality of postoperative life. It is worthy of clinical promotion.

Objective To investigate the clinical effect of precise percutaneous radiofrequency ablation of semilunar ganglion through fo -ramen ovale under the three-dimensional CT for the treatment of trigeminal neuralgia .Methods A total of 80 patients with primary trigeminal neuralgia in our hospital from August 2013 to December 2015 were selected,and they were randomly divided into two groups with 40 cases in each group .The control group was implemented blind detective radiofrequency ablation ,while the observation group was carried out under the three-dimensional CT positioning radiofrequency ablation .All the patients were followed up for 3 months after treatment .Compared the overall clinical results , and recorded the time of targeting the trigeminal nerve and the complications within 1 week after treatment between the two groups.The pain condition at different time points (before treatment,1 week and 3 months after treatment) between the two groups were com-pared.Results The positioning time of observation group was shorter than that of the control group ,the difference was significant (P<0.05). The VAS score of the observation group 1 week and 3 months after surgery was lower than the control group ,the difference was significant (P<0.05).The ratio of masticatory muscle weakness ,hypoacusis,facial swelling and congestion and corneal anesthesia of the observation group within 1 week postoperatively were lower than those of the control group ,the difference was significant (P<0.05).The effective rate of the observation group was higher than that of the control group ,the difference was significant (P<0.05).Conclusion Percutaneous radiofre-quency ablation of semilunar ganglion through foramen ovale under the three -dimensional CT for the treatment of trigeminal neuralgia has the advantages of more accurate positioning of the foramen ovale ,shorter operation time , and less complications ,which can relieve the pain of pa-tients and improve the overall clinical effect .

OBJECTIVETo prepare the trimeric subunits of recombinant human mannan-binding lectin (MBL) with biological activities.

METHODSA prokaryotic expression vector containing human MBL N-terminal deletant (rhMBLδN) gene we previously constructed was transformed into E. coli for efficient expression of rhMBLδN fusion protein. Based on the principle that the collagen polypeptides tend to self-assembly into the tertiary structure of proteins by forming a triple helix due to the characteristic properties of the collagen proteins, rhMBLδN fusion protein was limitedly hydrolyzed with thrombin. The obtained rhMBLδN polypeptide was repeatedly dialyzed in 50 mmol/L PBS (pH7.2) and ddH(2)O, and the final product was analyzed for its bioactivities using a ligand-binding assay and a C4d deposition assay.

RESULTSrhMBLδN polypeptide with a relative molecular mass of about 20 000 was obtained by limited proteolysis of rhMBLδN fusion protein with thrombin. Repeated dialyses of rhMBLδN polypeptides in 50 mmol/L PBS and ddH(2)O resulted in the isolation of the trimeric subunit trhMBLδN (with a relative molecular mass of about 50 000), which contained a collagen-like helix. The trhMBLδN protein had a higher ligand-binding activity than rhMBLδN polypeptide, and acquired the activity to initiate the lectin pathway of complement activation, but the activities were lower than those of natural MBL.

CONCLUSIONWe have successfully obtained the bioactive trimeric subunit of rhMBL, trhMBLδN, and this structural subunit is also the functional subunit of the MBL molecule.

Complement Activation ; Escherichia coli ; metabolism ; Genetic Vectors ; Humans ; Mannose-Binding Lectin ; biosynthesis ; genetics ; isolation & purification ; Recombinant Proteins ; biosynthesis

Aim To explore the effects of curcumin on inflammatory reaction and blood-brain barrier permeability in rats following cerebral ischemic injury,and to further investigate its potential mechanisms.Methods SD rats underwent the cerebral ischemia/reperfusion injury by the sutrure occlusion model were randomly divided into sham-control,cerebral ischemia and curcumin-treatment groups.Neurological deficit scores,cerebral infarction volume,brain water content and blood-brain barrier (BBB) permeability were measured,myeloperoxidase(MPO)activities in rat brain were measured as an index of neutrophil infiltration;content of tumor necrosis factor-α(TNF-α)in rat brain was detected by ELISA;expression of matrix metalloproteinase-9(MMP-9) in rat brain was determined by Western blot.Results Neurological deficit and cerebral infarction volume was decreased in curcumin-treatment group.The degree of neutrophilicgranulo cyte infiltration in cerebral tissues was decreased and the integrity of BBB was improved.Curcumin could also inhibit TNF-α and MMP-9 expression.Conclusion Curcumin exerts the neuroprotective effect on cerebral ischemia/reperfusion injury in rats through inhibiting the inflammatory reaction and improving BBB integrity,which may be associated with the inhibiton of TNF-α and MMP-9.

Preventing and curing emergency infectious diseases,such as A H1N1 influenza,is a public health practice,and its relevant ethical problems are pubic health ethical problems,mainly manifesting as the conflicts between individual interests and public interests,individual freedom and quarantine,individual privacy right and releasing partial medical information,and choosing one's own doctors and compulsory treatment.The core of the issue is that individual interests should be submitted to the public interests,and at the same time government and society should respect individual's freedom,privacy and right of health.

Objective To investigate the effect of 5-hydroxytryptamine(5-HT) and the plasticity of 5-HT3 and 5-HT4 receptors in the myenteric plexus on the pathogenesis of irritable bowel syndrome(IBS) subgroups.Methods Twenty-seven male rats were randomly divided into three groups: IBS with diarrhea(IBS-D) group,IBS with constipation(IBS-C) group and blank control group.IBS-D model was made in rats by intracolonic instillation with acetic acid.IBS-C model was made in rats by gastric instillation with cool water.After rats in each group were killed,a colon segment was removed for detecting enteric neuron and excitatory neurotransmitter in the myenteric plexus using 5-HT and 5-HT3,5-HT4 receptors immunohistochemistry method.Results ① The number of 5-HT positive neurons in the myenteric plexus of IBS-D group(4.37?0.88) group was significantly higher than that in control group(2.99?0.41,P0.05).② The results of the experiment showed that there was no difference in the number of 5-HT3 receptor positive neurons in the myenteric plexus among each group(F=0.082,P=0.922).③ The positive value of 5-HT4 receptor immunoreactive neurons in the myenteric plexus of IBS-D group(141.98?6.96) group was significantly higher than that in control group(159.90?2.55)(P0.05).Conclusion Increased number of 5-HT and 5-HT4 receptor positive neurons in the myenteric plexus may be related to the pathogenesis of IBS-D rat model.