Objective To clone and express a novel gene cDNA fragment,pbmag-1,from Plasmodium berghei ANKA strain. Methods The cDNA sequence of pbmag-1 was obtained from the GenBank of P.berghei ANKA genomic databases,with which a pair of primers was designed and RT-PCR was used to get a cDNA fragment of the gene from the parasite. The expanded cDNA 3′ fragment of the gene was obtained by 3′-RACE using the oligo dT primer and a set of specific primers. The intact cDNA 3′ fragment was cloned into a prokaryotic expressional vector and transformed into the BL21-(DE3)-RIL strain of Escherichia coli. The recombinant protein of PbMAg-1 was expressed with an optimized strategy and used to immunize mice. Results The pbmag-1 cDNA fragment obtained was 1 341 bp in length,A/T rich (73%) and with a correct 3′ end sequence. By Western blot,the anti-serum of mice immunized with the recombinant protein of PbMAg-1/GST,which was expressed as inclusion bodies,specifically recognized a band with Mr 64 000 molecule from the protein extracts of P. berghei-infected mouse erythrocytes. Conclusion The pbmag-1 cDNA sequence with intact 3′ has been obtained,which will be used for further study on its role in the immune response of P. berghei infection.

Tangdu hospital of the fourth military medical university explored the aim,method,critical points and effect for organizing a neurosurgical continuous education Journal club and summarized the key factors important for its successful organization and the improvement of its short-term and long-term educational effects in order to discover a Journal club education pattern which could satisfy the demand of for neurosurgical refresher doctors.Paying attention to these factors could better satisfy the demand of for neurosurgical refresher doctors,achieve their participating aims,promote their understanding of the advancing front of the discipline and improve their literature analyzing competence and problem solving ability.The wide application of continuous education Journal club is helpful to improve the level of neurosurgical continuing education in our country.

Objective To detect the DNA damage of ras gene induced by organic concentrate of drinking water using randomized terminal linker-dependent PCR. Methods The single-stranded probes of exons of rass gene in human were prepared. The TK6 cell was treated with organic concentrate of drinking water, then genomic DNA was amplified by RDPCR and detected by Southern hybridization with the probe. Results The clear hybridized band induced by organic concentrate of tap water could be seen in the position of exon 2 of N-ras gene,but in those of exon 1 of N-ras, exon 1 and 2 of H-ras gene it could not be detected. No hybridized bands induced by organic concentrate of raw water were seen in any position. Conclusion The organic concentrate of drinking water can cause the DNA damage of ras gene and it is considered as a kind of genotoxic substance.

Animals ; Humans ; Reference Standards ; Tissue Banks ; standards ; trends

The clinical manifestations of the disease lacked specificity,and the clinical symptoms were nasal obstruction, any blood in snively and slightly swelling pain on face. The neoplasm with unsmooth surface looked taupe and maroon, and was brittle and easy blooding. Paranasal sinus CT:crumbly mass lesion within the shadow filled in the left side of the maxillary sinus,and the sinus stopped up,sinus wall bone was absorpt and thinned, front and rear wall and inner wall bone were boundedness broken off, knuckle partly to the nasal cavity. Direct reinforcement MRI:in addition to the result of paranasal sinus CT,enhance examination found obviously asymmetrical intensify of the focus. The pathological diagnosis of postoperation was malignant melanoma on the left side of the maxillary sinus.
Humans ; Male ; Maxillary Sinus Neoplasms ; Melanoma ; Middle Aged

Journal Club education method is widely used in resident training in foreign countries.Its function in neurosurgery clinical training is gradually focused on.This method will promote the mastery of new concept,new method and new technique by the residents,help them to form good reading habit and improve their ability to solve actual clinical problems.The application of Journal Club education method in neurosurgery clinical training in our country may have positive influence on the standardized training of clinicians and the spreading of evidenced-based medicine.

Objective To investigate the best dignostic cut-off point of non-typical ectopic pregnancy(EP) through the determination of vascular endothelial growth factor(VEGF)in 154 cases of suspected ectopic pregnancy patients.Methods The serum level of VEGF in 154 cases with suspected EP was determined by means of immunossay technique,and the results were made into ROC-Curve.Results The acreage behind the curve was 0.95,illustrating that the VEGF can be as a better marker for early diagnosis of EP.The serum VEGF level of 200pg/ml was the cut-off point for early diagnosis of EP throash ROC-Curve.Condusion The serum VEGF can be considered as an early diagnostic marker of EP,which cut-off point is benifical to reducing misdiagnosis of EP.

Objective To evaluate the clinical efficacy of combined use of Pathfile and Mtwo in the preparation of curved root canals.Methods This study enrolled a total of 90 teeth(313 root canals)that need root canal therapy because of pulpitis or apical periodontitis from December 2013 to February 2014.All root canals were randomly divided into three groups.In group A,both Pathfile and Mtwo NiTi files were used in root canal preparation.In group B,Pathfile and ProTaper were used.ProTaper was employed alone in root canal preparation in group C.The high temperature thermaplasticized inj ectable ver-tical condensation technique was applied in all the three groups.The time of root canal preparation,the number of separated de-vices,root canal transportation and the quality of root canal filling were obtained and compared among the 3 groups.Results In group A,the time of root canal preparation was shortest,(6.01±1.12)min ;there were no instrument separation and ledge for-mation,and the filling rate was highest in group A.The differences were significantly noted in these indexes between group A and groups B,C.Conclusion Combined use of Pathfile and Mtwo for preparation of curved root canals is fast and safe,and the root canal filling is satisfactory.This method is suitable for clinical application.

Objective To explore the expressions of transforming growth factor(TGF)-?1 and connective tissue growth factor(CTGF) in viral myocarditis(VM) and the intervention effect of valsarta on them.Methods Fifty-four male Balb/c mice were randomly divided into 3 groups:control group,treatment group and model group.Model group and treatment group established VM model by intraperitoned injecting 0.1 ml CVB3.They were killed on days 7,14 and 28,respectively.Histological cross sections of heart were stained with hematoxylin-eosin and myocardial histopathplogic scores were counted under optical microscope.The expressions of typeⅠand Ⅲ myocardial collagen,TGF-?1 and CTGF were examined by immunohistochemical method and analyzed by using SPSS 11.5 software.Results Compared with control group,histopathplogic scores,the expressions of type Ⅰand Ⅲ myocardial collagen,TGF-?1 and CTGF increased markedly in model group (Pa

Objective To investigate the outcome of microsurgical treatment and its influencing factors in patients with aneurysmal subarachnoid hemorrhage.Methods The consecutive patients with aneurysmal subarachnoid hemorrhage treated with the early or ultra-early microsurgery were enrolled retrospectively.The Glasgow outcome scale (GOS) was used to assess the outcomes of patients at discharge.GOS 4-5 was defined as good outcome,and GOS 1-3 was defined as poor outcome.Results A total of 147 patients with aneurysmal subaraclnoid hemorrhage were enrolled.One hundred and twelve patients (76.2％) had good outcomes.There were significant differences in the proportions of preoperative Glasgow Coma Scale (GCS) scores (12.8 ± 2.8 vs.7.5 ± 3.8;t =7.525,P ＜0.001),low Hunt-Hess grade (83.0％ vs.31.4％;x2 =34.318,P ＜ 0.001),size of aneurysm (x2 =9.531,P =0.009),preoperative rebleeding (6.3％ vs.25.7％;x2 =8.506,P =0.003),preoperative brain herniation (4.5％ vs.40.0％;x2 =26.846,P ＜ 0.001),initial CT scan showing intracerebral hemorrhage (19.6％ vs.48.6％;x2 =11.449,P =0.002),and intraventricular hemorrhage (8.9％ vs.40.0％;x2 =18.846,P ＜0.001) between the good outcome group and the poor outcome group.Multivariate logistic regression analysis showed that the larger aneurysm (odds ratio [OR] 3.194,95％ confidence interval [CI] 1.458-6.999;P =0.004),older age (OR 1.054,95％ CI 1.013-1.097;P=0.010),lower preoperative GCS score (OR 0.539,95％ CI 0.410-0.724;P ＜ 0.001),and preoperative brain herniation (OR 3.633,95％ CI 1.039-12.700;P =0.043) were the independent risk factors for poor outcomes.Conclusions After active surgical treatment,most of the patients with aneurysmal subarachnoid hemorrhage have good outcomes,however,patients with older age,larger aneurysms,lower preoperative GCS scores,and preoperative brain herniation usually have poor outcomes.