Purpose To clone and express Trypanosoma Leucyl-tRNA synthetase (LeuRS) gene and to complete the purification and activity assay of LeuRS. Methods We cloned the LeuRS gene from T. Brucei genomic DNA,and cloned it into pBS-T and then into the expression vector pET21a( + ) .The expression of T. Brucei LeuRS was carried out in E. coli BL21 (DE3) RIPL host by optimizing the expression conditions. The products are purified by His-Bind affinity column and verified by Western blot . Enzymatic activity was detected by isotope labeling. Results A DNA fragment at length of 3.2 kb was amplified. Both restriction analysis and sequencing analysis proved that recombinant plasmid pET21a( + )/LeuRS was correctly constructed. The expressed product contained about 20% of total somatic soluble protein and reached a purity of 85% after purification . It was verified by the Western blot. Enzyme unit per millilitre of purified products was about 72. Conclusion Here we report the successful clone, expression and purification of LeuRS from Trypanosoma Brucei ( T. Brucei) in bacterial host. In addition, we tested its enzymatic activity by isotope labeling.This work would be helpful to the design and in vitro screening of Trypanosoma LeuRS inhibitors.

Effects of glucose concentration and pH\|control upon production of exopolysaccharides of Grifola frondosa was studied.The results showed that glucose at concentration of 5% was favorable to exopolysaccharides production,and the pellets benefited from the controlled start pH as well as the controlled final pH of 3 5～4 0 to produce exopolysaccharides.Attempt on the exopolysaccharides production with recycled pellets in the saccharoid solution was also made in this work.

A pregnant lady in her third trimester presented with a rapidly growing right-sided nasal mass associated with epistaxis and nasal obstruction for six months. Examination showed a non tender, protruding mass completely occluding her right nostril. Wide surgical excision was done under anaesthesia. Histopathology revealed capillary haemangioma. In a gravid patient with a rapidly growing intranasal lesion, capillary haemangioma should be considered as a differential diagnosis.
Diagnosis, Differential ; Epistaxis ; Female ; Hemangioma, Capillary ; diagnosis ; pathology ; Humans ; Nasal Cavity ; physiopathology ; Nasal Obstruction ; pathology ; Nose Neoplasms ; diagnosis ; pathology ; Pregnancy ; Pregnancy Complications, Neoplastic ; diagnosis ; pathology

Objective To study and compare the effects and mechanisms between the Xuebijing injection and Danshen injection on ischemic-reperfusion injury of rabbit limb .Methods 30 New Zealand rabbits were randomly divided into control group ,Xuebi-jing group and Danshen group ,with 10 in each group .The Crinnion model of ischemic-reperfusion injury of rabbit limb was used . Each group was treated correspondingly after the blood flow was restored .Xuebijing group and Danshen group were treated with 4 mL/kg Xuebijing injection 2 mL/kg Danshen injection in saline with 10 mL total volume .Control group was treated with 10 mL sa-line .Before releasing clip and 1 h ,2 h and 4 h after reperfusion ,the blood samples were collected for detecting clotting function (APTT ,FIB ,PT-INR ,PT) ,biochemistry items (ALB ,LDH ,CK) ,MDA level and SOD level .Results Compared with control group ,the APTT of Xuebijing group in 1 h and 2 h and Danshen group in 4 h after reperfusion improved significantly (P<0 .05) . The PT of Xuebijing group after reperfusion extended significantly compared with the PT before reperfusion (P<0 .05) .The FIB level of Xuebijing group and Danshen group in 4 h after reperfusion was much higher than before (P<0 .05) .The LDH and CK level of Xuebijing group after reperfusion was much lower than that of control group (P< 0 .05) .The MDA level of Xuebijing group in 2 h and Danshen group in 1 h ,2 h after reperfusion was much lower than that of control group (P<0 .05) .The SOD activ-ity of Xuebijing group in 1-4 h and Danshen group in 2 h after reperfusion was much higher than that of control group (P<0 .05) .Conclusion Xuebijing injection and Danshen injection have the relieving effect on the limb ischemic-reperfusion injury by ad-justing clotting function and decreasing free oxygen radicals .In terms of relieving the injury of muscle tissue ,the effect of Xuebijing injection might be better than Danshen .

Objective To observe the therapeutic effect of Tianwang Buxin Decoction for delirium after hip joint replacement in senile femoral neck fracture patients. Methods A total of 57 senile patients with femoral neck fracture induced by falling were enrolled from the department of arthropathy of Zhongshan Hospital of Traditional Chinese Medicine admitted from September of 2009 to February of 2014. The patents were aged over 65 years, and had delirium after hip joint replacement. Random number method was used to divide the patients into Chinese medicine group ( 29 cases) and western medicine group ( 28 cases) , which were given oral use of Tianwang Buxin Decoction and Olanzapine separetely. Before and after treatment, we observed the scores of Delirium Rating Scale (DRS), time for delirium disappearing, and incidence of indifferent mind and somnolence.Results (1) After treatment, DRS scores were obviously decreased in both groups (P<0.01 compared with those before treatment), but the difference was insignificant between the two groups (P>0.05). (2) The difference of time for delirium disappearing was insignificant between the two groups after treatment ( P>0.05). ( 3) After treatment, 7 cases of the control group had indifferent mind or somnolence, accounting for 25%. No case of the treatment group had indifferent mind or somnolence. The difference between the two groups was significant ( P<0.01). Conclusion Oral use of Tianwang Buxin Decoction has the same effect as Olanzapine for the treatment of delirium after hip joint replacement in falling-induced senile femoral neck fracture patients, and has the advantages of having no adverse reaction of indifferent mind or somnolence, and can realize comprehensive treatment by modification of the recipe according to the symptoms.

Objective To study the clinical, radiologic and pathologic characteristics and diagnostic methods of telangiectatic osteosarcoma for further improving the diagnostic ability.Methods The data of 10 patients with histologically proved telangiectatic osteosarcomas were retrospectively reviewed, and the clinical, radiologic and pathologic characteristics were further analysed in combination with the literature.All 10 patients were examined with X-ray and MRI, and 2 patients with CT.Results Telangiectatie osteosarcomas originated from inferior femur in 5 patients, femur neck in 1 patients, superior humerus in 2 patients and superior segment of tibia in 2 patients.The lesions showed osteolytic bone destruction on X-ray films (n = 10) and CT images ( n = 2), with mild bone expansion in 4 patients.The majority of the edge of the destroyed bone areas was unclear but without sclerotic rim.There were Codman's triangle and soft tissue mass in each patient but no obvious neoplastic bone forming.On MRI, all the lesions were mostly or completely constituted by the multiple cysts with periostnal reaction, and several scatteredly smaller liquid-liquid levels were found within cystic cavity in 7 patients.In all 10 cases, there were pathologic hemocoele similar to aneurysmal bone cysts (ABC), but malignant tumor cells and some neoplastic bones were found in cystic walls or septations.Only a small number of neoplastic bone tissue were seen by microscopy in 6 patients.Conclusions The radio-pathologic characteristics of telangiectatic osteosarcoma include the similar imaging findings of ABC, the common growth patterns of malignant tumors,and the pathologic hemocoele, malignant tumor cells within cystic wails or septations.The comprehensive analysis of clinical, radiologic and pathological data may help clinicans to make a correct diagnosis for telangiectatic nsteosareoma.

Objective To investigate the clinical effects of transurenthral resection of muscleinvasive bladder tumor (TURBT) in senile. Methods This study was clinical prospective random research.46 senile cases with muscle-invasive bladder cancer treated by TURBT was divided into 2 groups:control group and observed group.The observed group was treated with TURBT combined with intravesical instillation of pirarubi 30 mg immediately after TURBT,the bladder wall around tumor was resected thoroughly.The control group underwent radical cystectomy and pelvic lymph node dissection. Results The clinical improvement rate was higher in observed group than control group (85.7％ s.63.6％,X2 =5.3008,P=0.021).There was not difference in 3 years recurrence rate between observed group(25.0％) and control group(13.6％) (x2 =S.3008,P＞0.05).The 1 year survival rate were 95.8％,90.9％ and 3 years survival rate were 79.2％,72.7％ in observed group and control group,respectively,and there were no differences between the two groups(X2 =0.262,P=0.609). Conclusions TURBT combined with intravesical instillation of pirarubi can enhance clinical effect and reduce recurrence rate in the treatment of the elderly with muscle-invasive bladder cancer.

Objective:To explore the epidemiological characteristics and clinical outcomes of patients diagnosed with novel coronavirus (COVID-19) pneumonia (NCP), and to provide clinical reference for subsequent epidemic prevention and control.Methods:The pathogenesis, clinical characteristics and clinical outcomes of 62 patients with imported novel coronavirus COVID-19 pneumonia in Qingdao area from January 21, 2020 to April 6, 2020 were analyzed.Results:There were 24 males and 38 females, aged from 5 to 91 (52.5±15.7)years. Among them, 31 cases (31/62, 50%) were family cluster disease, 11 cases (17.74%) were nosocomial cross infection, 14 cases (22.58%) came back from Wuhan to Qingdao and community contact infection, and 6 cases (9.68%) were imported from abroad. The longest time from fever to diagnosis was 26 days. Clinical classification: 40 cases were mild, 13 were general, 7 were severe, 2 were critically ill. 61 cases were discharged from hospital, and 1 was dead. The clinical cure rate was 98.39%. The average stay was (18.5±4.8)days. All patients were treated combined with Chinese medicine on the basis of symptomatic treatment.Conclusions:The clinical symptoms of imported NCP are relatively mild, and mild cases were more, the recovery rate was higher. The intervention strategy of traditional Chinese medicine is conducive to rehabilitation. The external input cases and symptomless infected patients are important for epidemic situation in the future.

Objective To investigate the correlation between cytochrome P450(CYP) 2C19 gene polymorphism with major adverse cardiovascular events(MACE) after PCI in the patients with coronary heart disease(CHD).Methods A total of 233 patients with CHD undergoing PCI in the cardiology department of our hospital from January 2014 to January 2015 were selected.All patients were given the standardized dual anti-platelet therapy of aspirin and clopidogrel.The occurrence situation of MACE within 1 year(unstable angina pectoris,cardiac death,in-stent restenosis,non-fatal myocardial infarction) was obtained by follow up.All patients were divided into the MACE group and non-MACE group.The PCR solubility curve was adopted to detect the CYP2C19 gene polymorphism.Results Among 233 cases of CHD,37 cases (15.88％) developed cardiovascular events and 196 cases (84.12 ％) did not develop vascular events;the age,sex,hypertension and diabetes mellitus had no statistical differences between the two groups(P＞0.05).The frequency of CYP2C19 * 1 in the included cases was 68.45％,which of CYP2C19 * 2 was 28.33％ and which of CYP2C19 * 3 was 3.22％.The extensive-metabolism,intermediate metabolism and slow metabolism types in the cardiovascular events group accounted for 5.41 ％,64.86 ％ and 29.73 ％ respectively,while which in the non event group were 59.69 ％,29.08％ and 11.22％ respectively,the CYP2C19 genotype distribution had statistically significant difference between the two groups(P＜0.05).The multivariate Logistic regression analysis showed that CYP2C19 intermediate metabolism type [OR 2.562,95％CI(2.825,7.350),P=0.021 0],slow metabolism type [OR 5.139,95％CI(1.289,5.232),P＜0.01],hypertension [OR 2.480,95 ％CI(1.079,5.698),P=0.032 4],smoking[OR 4.802,95％CI(1.082,18.371),P=0.029 0] were the independent risk factors for the occurrence of cardiovascular events in the patients with CHD.Conclusion CYP2C19 * 2 and CYP2C19 * 3 gene polymorphism are the independent risk factors for MACE occurrence after PCI in the patients with CHD.

Objective To explore the effect of the intestinal ischemia/reperfusion injury on paracrine patterns of BM-MSCs in order to provide evidence for BMSCs repair.Methods BMSCs were isolated,cultured,characterized,and stained.The rat intestine ischemia/reperfusion model (IRI) was established.Intestinal epithelial mucosal extracts were obtained either from IRI rat or normal rat.Those two type extracts were added into the culture medium,and BM-MSCs were cultured with the two conditioned medium respectively.The culture medium was collected at 0 h and 24 h after culturing with intestinal epithelial mucosal extracts.The levels of TGF-ot,VEGF,FGF and IGF-1 in the medium were assayed by ELISA.Results The contents of all the growth factors detected in cultured medium with intestinal extracts from IRI rats were significantly higher than in regular rats (P ＜ 0.05).The levels of TGF-α,VEGF in culture medium containing IRI epithelium extracts were significantly higher than that in the medium containing normal intestinal epithelium extracts (P ＜ 0.05)Conclusion BM-MSCs can secret TGF-α,VEGF,FGF,and IGF-1 in the presence of intestinal extracts from IRI rat in the culture.These factors might stimulate the differentiation and proliferation of intestinal epithelial cells through paracrine mechanism.