Lipopolysaccharide(LPS) can induce cell inflammation through interacting with TLR4. Recent studies have revealed that MD-2 participate in the process of LPS induced signal transduction pathway by forming a complex with TLR4. After binding to the MD-2 of the TLR4/MD-2 complex, LPS can induce TLR4- oligomerization and activate the downstream signal pathway. After being synthesized, most MD-2 can bind to TLR4 at the endoplasmic reticulum /Golgi apparatus and expresse as TLR4/MD-2 complex at the cellular surface. Therefore MD-2 not only can regulate the distribution of TLR4 in the cytoplasm, but also help TLR4 to recognize LPS. Another part of MD-2 can be released into plasma as soluble MD-2(sMD-2). With the help of CD14, sMD-2 would interact with LPS in the plasma to constitute LPS-sMD-2 complex, helping cell who express only TLR4, to recognize LPS, however excessive expressed sMD-2 would repress the LPS signal transduction pathway. In conclusion, MD-2 plays a crucially modulating role in the process of TLR4 mediated endotoxin recognition and signal transduction.

Objective To assess the therapeutic effect and safety of radiofrequency catheter ablation of atrial fibrillation.Methods We analyzed the clinical data of 47 patients with atrial fibrillation who underwent radiofrequency catheter ablation between March 2013 and January 2008,in the First Affiliated Hospital of Xi'an Jiaotong University.In the average 32 months’follow-up,Holter monitering and echocardiography were reviewed for the left atrial diameter.Results The immediate success rate of catheter ablation for atrial fibrillation was 82.6%.The long-term success rate was 65%,the rate of paroxysmal atrial fibrillation was 69.7%,and the rate of longstanding persistent atrial fibrillation was 42.9%.After ablation,the left atrial diameter were markedly reduced compared with that before treatment [(36.3 ± 4.3 )mm vs .(38.1 ± 5.9 )mm)(P < 0.001 ).The patients with recurrent atrial fibrillation were older than those without recurrence,their left atrial diameter was bigger,and the prevalence rate of hypertension was higher (P <0.05).The average atrial fibrillation load was 14.9% after ablation compared with 46.1% before (P <0.05).Conclusion Radiofrequency catheter ablation is an effective and safe treatment of atrial fibrillation,especially for paroxysmal atrial fibrillation.The left atrial diameter was significantly decreased after radiofrequency catheter ablation compared with that before the ablation.

Objective Using serum pharmacology method to assess the optimal dose of Rhodiolasachalinensis extract (RSE)and Codonopsispilosula extract (CPE)combination as well as the effects of the combination on the immune function of mice.Methods Using the 3×3 facterial design,nine medicated serum of CPE and RSE mixture were made to assess the optimum combinational dose of CPE and RSE by detecting the T,B lymphocyte proliferation abilities and NK cell activity in vitro .Using the optimum combinational dose and reducing 2.5,5 and 10 times as high,middle and low doses of RSE+CPE groups,and the T,B lymphocyte proliferation abilities and the activity of NK cells in the mice were detected in vivo .Results The result of serum pharmacology indicates that compared with control group,the proliferation abilities of T,B lymphocytes and the activity of NK cells inducing by ConA and LPS in 200 mg· kg-1 RSE + 790 mg· kg-1 CPE group were increased (P < 0.05).The result of in vivo experiment indicated that compared with cyclophosphamide group,the spleen indexes (SI)in middle and high doses of RSE+CPE groups were significantly increased (P <0.05);compared with low dose of RSE+CPE group,the WBC number in middle dose of RSE + CPEgroup was significantly increased (P < 0.05 ). Compared with cyclophosphamide group,the T and B cell proliferation abilities induced with ConA and LPS and killing activities of NK cells in low,middle and high doses of RSE+CPE groups and positive drug CVT-200 group were significantly increased (P <0.05).Compared with CVT-200 group,low and high doses of RSE+CPE groups,the T and B cell proliferation abilities induced with ConA and LPS and the activity of NK cells in middle dose of RSE+CPE group were significantly increased (P <0.05).Conclusion RSE and CPE mixture can enhance the immune function of mice;RES 200 mg·kg-1 and CPE 790 mg·kg-1 are the optimal doses.

Objective To evaluate the usefulness of functional magnetic resonance imaging (fMRI) as a noninvasive method in recording the activities of the human brain as excited by low frequency current(LFC) stimulator. Methods The right common peroneal nerves of 6 healthy volunteers were stimulated with LFC (NMR-II stimulator). The activities of the brain were then recorded and evaluated during the scanning by the fMRI technique. Data obtained during the study were dealt with with the software SPM99. Results In both cerebral hemispheres, the area where the postcentral and superior temporal gyrus, inferior parietal lobule met were excited, and so were the operculum at both sides. Postcentral gyrus, superior parietal and paracentral lobule, and the precuneus in the left cerebral hemisphere, as well as the superior occipital gyrus and the superior parietal lobule in the right hemisphere,were involved as the excited areas. Conclusion fMRI is a useful tool for recording and evaluating the brain activities excited by LFC.

Objective To investigate the expression of LOXL2 protein (lysyl oxidase like-2 protein) and epithelial-mesenchymal transition (EMT) related markers in cholangiocarcinoma tissues and its relation with the malignant features. Methods The expression of LOXL2、E-cadherin and Vimentin protein in 48 cases of cholangiocarcinoma tissues was detected by immunohistochemistry and compared with the clinicopathological data of cholangiocarcinoma. Results The positive expression rate in cholangiocarcinoma was 71% ( 34/48 ) for LOXL2 and 46% ( 22/48 ) for Vimentin, the absent expression rate was 52% (25/48) for E-cadherin. The positive expression rate of LOXL2 was significantly associated with the absent expression of epithelium markers E-cadherin ( r = 0. 394, P < 0. 05 ) and the positive expression of fibroblast markers Vimentin ( r = 0. 406, P < 0. 05 ). There was no correlation between the expression of LOXL2 and patients gender, age, and cancer differentiation, but a significant correlation with tumor metastasis was found ( P < 0. 05 ). Conclusions LOXL2 protein overexpression in cholangiocarcinoma may accelerate invasion of cholangiocarcinoma through induced EMT.

Objective To investigate the correlation of the expression of KAI1/CD82 and laminin receptor (LNR) in cholangiocarcinoma, and study its role in the invasion and metastasis of cholangiocarcinoma. Methods The expressions of KAI1/CD82 and LNR in 48 cholangiocarcinoma tissue samples were detected by SP immunohistochemistry, and their relationships with clinicopathological factors were analyzed. Results The positive expression rates of KAI1/CD82 and LNR in cholangiocarcinoma were 31% (15/48) and 54% (26/48), respectively. In highly differentiated cholangiocarcinoma, the positive expression rate of KAI1/CD82 was high (χ2=3.911, P<0.05), while that of the LNR was low (χ2=6.970, P<0.05). The positive expression rate of KAI1/CD82 in cholangiocarcinoma with metastasis was significantly lower than that in cholangiocarcinoma without metastasis (χ2=5.765, P<0.05), while the positive expression rate of LNR in cholangiocarcinoma with metastasis was significantly higher than that in cholangiocarcinoma without metastasis (χ2= 9.952, P<0.05). The expression level of KAI1/CD82 was negatively correlated with that of the LNR ( r = -0.462, P < 0.01 ). Conclusions The up-regulated expression of LNR in cholangiocarcinoma correlates with the decreased expression of KAI1/CD82, and plays an important role in the invasion and metastasis of cholangio-carcinoma.

ObjectiveTo identify the effect of Xianlinggubao Tablet on the osteoporosis bone pain and bone density in a population of 50 cases at age of 50 and above. MethodsIn a prospective study, the changes of the clinic bone pain and bone density were observed before and after 4—8 weeks treatment. Results & ConclusionsThe bone pain in 36 of 50 was relieved, but no significant difference was observed in bone density. Therefore, Xianligubao Tablet can relieve the osteoporosis bone pain, which may change the space structure of bone trabecula.

Objective:To investigate the effect of fibrinogenase combined with aspirin on blood viscosity and clinical efficacy in patients with acute cerebral infarction.Methods:Senventy patients with mild to moderate acute cerebral infarction from October 2016 to June 2020 were collected from the Third People′s Hospital of Dalian. Patients were divided into control group and treatment group according to the random number table method, with 35 cases in each group. The control group was given oral aspirin plus an intravenous drip of normal saline equal to the treatment group, while the treatment group was given aspirin plus fibrinogenase by intravenous drip. Both groups were given symptomatic treatment such as management of blood glucose, blood pressure, arteriosclerosis plaque stabilization and improvement of circulation for 10 d. Blood viscosity and neurological deficit score were measured before and after treatment.Results:Compared with baseline values, WBV showed a slight decrease in all shear rates in the control group after treatment compared with that before treatment, but the difference was not statistically significant ( P>0.05). In the treatment group, all shear rates decreased compared with that before treatment ( P<0.05), and the effect of WBV was significant compared with that of the control group ( P<0.05). The improvement of neurological function in the treatment group was better than that in the control group. The significant efficiency and the total effective rate in the treatment group were significantly higher than those in the control group: 34.3% (12/35) vs. 25.7% (9/35), 88.6% (31/35) vs.71.4% (25/35). Conclusions:Fibrinogenase combined with aspirin in the treatment of acute cerebral infarction patients can safely and effectively reduce blood viscosity and improve clinical symptoms.

Objective To explore the effects of rehabilitation on radial nerve injury.Methods 20 patients with radial nerve injury were included.The involved muscles were stimulated with NMR-muscular restorer for 10～15 min per muscle combined with kinesitherapy for 20～30 min.The patients were followed up for 12～30 months.Results 15 cases with no-operation recovered to 16 marks,which means excellent,3.5～18 months after rehabilitation.3 case after nerve exploration recovered to 16 marks in 1 case and 15 marks in 2 cases.1 case after neuro-anastomosis recovered to 6 marks,which means improved,6 months after rehabilitation.1 case after radial nerve graft recovered to 4 marks,which means no-improved after 12 months follow-up.Conclusion Neuromuscular electrotherapy combined with kinesitherapy is effective on radial nerve injury.

ObjectiveTo measure cortical areas involved ankle dorsiflexion and planter flexion.MethodsSix-health subjects performed ankle dorsiflexion and planter flexion. While, functional MRI at 1.5 T was made.ResultsWhen ankle dorsiflexion, the excited cortical areas included bilateral primary motor cortex (MⅠ) and primary somatosensory cortex (SⅠ), but area on contralateral side bigger than that on ipsilateral side, as well as chief visual cortexes and vermis of cerebellum. Inhibited areas included area 19, area 20 and area 39. When ankle planter flexion, the excited areas included contralateral secondary motor area (MⅡ) and striate body, ipsilateral supplementary motor area (SMA) and limbic system. Inhibited areas included bilateral upper middle precentral gyrus and postcentral gyrus, superior parietal lobule, inferior parietal lobule and prefrontal cortex.ConclusionThere is a great difference in the brain function images respectively in ankle dorsiflexion and planter flexion.