This paper reviews the recent advances in recombinant expression and purification of defensins, including the choice of host cells, vectors and expression strategies in prokaryotic and eukaryotic cell ex- pression systems, as well as the status of purification processes. By summarizing the problems existed in the production and clinical applications of defensins, the authors here also pointed out the research directions for defensins, and conceived the prospects for its exploitation in the future.

Objective To study the pathogenic bacteria species and drug resistance rate in the intensive care unit(ICU)in county hospital to guide clinical rational use of antibiotics. Methods 263 various specimens were chosen from January 2013 to December 2013 in the ICU of Zigui County People's Hospital in Hubei Province,these were applied to perform the bacterial culture and identification,and disc AGAR diffusion method was used to test the in vitro drug susceptibility and observe the specimens distribution,pathogenic distribution and the rate of drug resistance. Results In the 263 specimens,the top three isolated were 131 sputum(49.8%),49 blood(18.6%) and 38 ascites specimens(14.4%)respectively,and the pleural effusion was the least isolated with 5(1.9%). A total of 125 strains bacteria were isolated with positive detection rate of 47.5%(125/263). In the 125 strains,80(64.0%) were Gram-negative(G-)bacilli at the pioneer position,and the top four were:Klebsiella pneumonia 23(18.4%), Acinetobacter Baumanni 19(15.2%),Escherichia coli 18(14.4%)and Pseudomonas aeruginosa 12 strains(9.6%). There were 33 strains(26.4%)of Gram positive(G+)cocci including mainly Staphylococcus aureus 25 strains(20.0%);fungi strains were 12,the least(9.6%). The drug resistance rates of the top four G- bacillus were as follows:the rate of Klebsiella pneumoniae to ampicillin sodium was the highest(100%),while its rate to imipenem,meropenem and ciprofloxacin was 0;the rates of Acinetobacter baumannii to tobramycin and ceftriaxone were very high(100%, 92.3%),while to imipenem,meropennem were much lower respectively(26.3%,15.4%);the rates of Escherichia coli to ampicillin sodium and piperacillin were relatively high(88.9%,83.3%),while the rates to amikacin,imipenem, meropennem respectively were 0;the rates of Pseudomonas aeruginosa to ceftriaxone,cefotaxime sodium were very high(both 100%),while the resistant rate to levofloxacin was 0. The G+ cocci had no drug-resistance to linezolid, teicoplanin and vancomycin;the rates of Staphylococcus aureus to azithromycin,clindamycin,erythromycin and penicillin were higher than 80%,and those of Excrement enterococcus to erythromycin,gentamycin,levofloxacin were also higher than 80%. Conclusions The ICU infection of our hospital is primarily respiratory tract infection, the pathogenic bacteria are mainly G- bacilli and the antibacterial drug resistance is very serious. Therefore it is necessary to monitor the trend of bacterial resistance closely,and according to the results of bacteria identification and drug susceptibility,the antimicrobial agents are reasonably chosen to effectively reduce and control the ICU hospital infection.

The cell-impedance substrate sensor,which is mainly used to detect the shapes and function ofcells and other micro.organism.is a novel tool based on the technique of BIOMEMS to study the cellular physiologyand clinical Dharmasology.It has drawn attention from both domestic and international scholars as well as compa nies in recent years for its advantages such as innovative design and long-term non-invasive monitoring.This paperintroduces the interfacial model of cell-sensor in detail and gives a sketch of the recent international researchprogress.Then the novel interdigitated array,which was designed in our group recently,is introduced.The fore ground of development is discussed in the end.

Objective　To study the therapeutic effect of hepatic artery and portal vein dual perfusion chemotherapy (AVPC) combined with intratumoral injection of lipiodol-ethanol (ITILE) for unresectable primary hepatic carcinoma (PHC). Methods　138 pathologically proved and unresectable PHC cases were divided into two groups: Group A (80 cases), treated with AVPC through hypodermic implanted drug delivery pumps. Group B (58 cases), treated with AVPC plus ITILE. Results　　The secondary resection rate was 2.5% in group A, while 　 12.1% in group B, (P<0.05); The 0.5, 1, 2 years survival rate in group A was 56.3% 45.0% and 21.2%, in group B 81.0% 61.2% and 39.6% respectively. there were significent difference between two groups in 0.5,1,2 years survival rate respectively (P<0.05); the complication occurrence rate was found no significant difference between two groups (P>0.05). Conclusions　The therapeutic effect of AVPC plus ITILE for unresectable PHC is much better than that of AVPC alone.

China ; Data Collection ; Safety ; Wounds and Injuries ; prevention & control

Cervical Vertebrae ; Dura Mater ; Epidural Space ; Humans ; Spinal Cord Neoplasms ; surgery

Objective To analyse and understand the main reasons for cesarean section,in order to reduce the rate of cesarean section. Methods Clinical analysis was performed in 6781 patients who underwent cesarean section from January 2004 to December 2008. Results ①Cesarean section rate was increasing from 2004 to 2008, which was 32. 00% (840/2625) , 35. 00% (966/2760) , 39. 08% (1186/3035), 45. 98% (1669/3630) and 51. 88% (2120/4086) .respectively. Compared to 2004, the cesarean section rate in 2008 increased significantly (P <0.01). ②The proportion of the main cesarean section indications changed, the proportion of social factors ,fetal factors and maternal factors were increasing gradually. Cephatopelvic disproportion in 2008 decreased significantly compared to that in 2004(x2 = 194. 805 ,P <0. 01). There was significent difference in each indication from 2004 to 2008. Conclusions The cesarean section rate has increased due to medical reasons and social reasons. To ensure the safety of the mothers and children, vaginal delivery should be adopted as far as possible. The cesarean section without medical indication should be prohibited.

Objective To investigate the influence of transient receptor potential canonical 6 (TRPC6) on the proliferation of hUVEC induced by the supematant from human prostate cancer cells (DU145). Methods Experiment group was treated with the mixture of DU145 cells supernatant and DMEM medium in different ratio, control group was treated with DMEM medium. The change of cell proliferation was detected by MTT method, and TRPC6 gene and protein was detected by PCR and Western-blot methods respectively. Results After incubated for 48h with the supematant from cultured DU145 cells,the population of hUVECs increased obviously, and the expression of TRPC6 genes and protein had clearly up-regulation. Conclusion The supernatant from cultured DU145 cells could effectively enhance the proliferation of hUVECs. The mechanisms might be that the proliferation of human umbilical vein endothelial cells was mediated by TRPC6.

Objective To evaluate the feasibility and safety of endoscopic thyroidectomy via anterior chest and breast for the treatment of patients with papillary thyroid carcinoma ( PTC ).Methods Endoscopic thyroidectomy was performed in 85 PTC patients between March 2006 and March 2010. Diagnosis was based on intraoprative frozen section. There were 83 females and 2 males, age averaged at 36. 3 years. Sixty three of 85 cases were diagnosed preoperatively as thyroid carcinoma and US revealed ipsilateral cervical lymph node enlargement suspective of metastasis in 12 cases. Endoscopic thyroidectomy plus selective neck dissection was performed. Results This procedure was carried out successfully in 84patients. There were 51 cases of papillary thyroid microcarcinomas(<1. 0 cm) , 28 cases between 1. 0 cm and<2. 0 cm, and 5 cases with the diameter between 2. 0 cm and 3. 0 cm. Total thyroidectomy, ispilateral lebectomy and ispilateral lebectomy plus contralateral subtotal lobetomy were performed in 4, 6, 74 cases,respectively. Central compartment dissection was performed in all of the 84 cases and ipsilateral neck dissection was also performed in 12 cases that were suspected metastatic lateral neck lymph nodes. The mean operative time was (113. 3 ±46. 5) minutes. No significant blood loss occurred. The mean number of lymph nodes yield in the central compartment and lateral compartment were 6. 5 (range 2 to 14) and 19. 2 (range 9 to 26 ), respectively. Forty-four cases ( 44/84, 52. 4% ) had metastatic lymph nodes in central compartment, while 11 cases (11/12,91.1% ) in lateral compartment. Six patients (6/84,7.14%) had transient vocal cord palsy and recovered after 1-2 months. Postoperative transient hypocalcaemia occurred in 4 cases (4. 8% ) , and there were no other major complications. The average postoperative hospital stay was 3. 7 days (range 3 to 6). No evidence of residual or recurrent disease was found at follow-up. The cosmetic results of this procedure were excellent. Conclusions The anterior chest and breast approach of endoscopic thyroidectomy is feasible and safe and cosmetic worthwhile for selected cases of PTC.

Objective To investigate the mechanism of radiosensitizing effects of endostatin on H-520 human lung squamous cancer cells.Methods H-520 cells was treated with endostatin and/or radiation.Colony-forming assays were used to indicate the radiosensitising effects.Cell cycle distribution and expression of phosphor-p38-MAPK were assayed by FCM,and cyclin D1,cdk2,cdk4 and survivin mRNA leveh were assayed by RT-PCR.Phosphor-Akt was evaluated by Western-blotting.Results Combination of endostatin and irradiation inhibited the proliferation of H-520 cells.According to the colony-forming assays,the D0,Dq,D10 and SF2 values of the combination groups were much lower than those of irradiation groups.The sensitization enhancement ratio(SER)was 1.51.G2/M arrest occurred after 4 Gy irradiation.The gene expression of cyclin D1,cdk2,ckd4 and survivin and phosphor-Akt protein were down-regulated after treatment.The expression of phosphor-p38-MAPK protein was also down-regulated after treatment with 200 μg/ml endostar.Conclusions Endostatin inhibits the growth of H-520 cells and radiosensitizes the cells by induction of G0/G1 arrest,cell apoptosis and down-regulation of gene expression of cyelin D1,cdk2,cdk4 and reduces the phosphorylation of Akt and p38-MAPK.