Tetraspanin 2-A(SjTsp2-A) gene was amplified by PCR.pcDNA3.1(+)/SjTsp2-A recombinant plasmids were constructed and transformed into E.coli DH5?.Twenty four BALB/c mice were randomly divided into pcDNA3.1(+) /SjTsp2-A group(A),pcDNA3.1(+)/SjGST group(B) and pcDNA3.1(+) group(C).Each mouse was injected through musculus quadriceps femoris by three times(two weeks interval) respectively with 100 ?g pcDNA3.1(+)/SjTsp2-A,pcDNA3.1(+)/SjGST,or pcDNA3.1(+).At two weeks after the final inoculation,mice were each challenged by 40?2 cercariae of S.japonicum.Forty-five days after infection,all mice were sacrificed,the number of worms collected and eggs in liver tisssue was counted.Anti-pcDNA3.1(+)/SjTsp2-A antibody was detected by ELISA and protein expression in quadriceps muscle by immunohistochemical staining.The worm reduction rate(44.4%) and egg reduction rate(28.4%) of group A was higher than those of group B and C(P

Objective To understand the current situation and requirements of laboratory quality control of blood diseases in Chongqing .Methods A self‐designed questionnaire was designed ,and the investigation was carried out in 60 hospitals of Chongqing district .The main contents of the investigation were related to the instruments of work environment ,the regulations ,the conditions of the personnel ,etc .Results A total of 60 questionnaires were distributed ,57 questionnaires were valid .In the study ,only 14 .04%laboratories were the blood disease specialist laboratory ,most hospitals could complete the basic inspection items .66 .67% hospitals had all the experimental procedures and SOP documents .Most of staffs were with intermediate professional titles and undergraduate education .A total of 35 .08% experimental equipments with the value of over 5 million RMB ,45 .61% equipments had a special in‐spection records .About 45 .61% test reports would refer to the clinical performance ,and had a strict signing guideline .Most of the research objects reflected the problems ,including the backward equipments and the lack of personnel ,and hoped to set up telemedi‐cine indemnity system and carry out further education .Conclusion The overall quality of the laboratory for blood diseases in Chongqing is better ,it is recommended to strengthen the full quality control ,to establish emergency system ,and to improve the quality and level of laboratory .

Objective To investigate the feasibility and clinical effect of one-stage total knee arthroplasty for old femoral condyle fractures combined with knee osteoarthritis.Methods From January 2003 to December 2010,11 patients with old femoral condyle fracture combined with knee osteoarthritis,including 4males and 7 females,aged from 38 to 77 years (average,58.3 years),underwent one-stage total knee arthroplasty.There were 8 cases of supracondylar fracture,and 3 cases of intercondylar fracture.Moreover,there were 2 cases of knee fibrous ankylosis with mild amyotrophy,3 cases of collateral ligaments injury of the knee,2 cases of fibrous union,and 2 cases of infective nonunion.Results All patients were followed up for 6 to 72 months (average,41.3 months).The HSS score improved from preoperative 6.65±7.01 (range,0-13)to 88.5±6.18 (range,81-95) at final follow-up.The range of motion of the knee improved from preoperative 32.7°±17.6° (range,0°-50°) to 101.3°±9.8° (range,85°- 115°) at final follow-up.One case underwent knee disarticulation 6 years after operation owing to infection.For other patients,there were no complications such as infection,deep vein thrombosis,knee instability,component loosening and inequality of lower limb.Conclusion One-stage total knee arthroplasty is a technically difficult but effective method for patients with old femoral condyle fracture and knee osteoarthritis.

Objective To construct markless gene deletion mutant at the clpP loci on the chromosome of Streptococcus mutans(S.mutans).Methods ASp resistance gene was amplified by PCR,to construct the Sp resistance cassette where the Sp resistance gene was flanked with two loxP site.After the clpP gene was cloned into the pGEM-T-Easy TA cloning vector,it was digested and linked with the Sp resistance cassette,yielding homologous recombination vector pIB △ clpP-Sp.The vector was linearized and used for the transformation of S.mutans UA159,with transformants selected on TPY plates containing Sp.The selected strain was transformed with the thermosensitive plasmid pCrePA to excise the Sp resistance gene.The pCre-PA was then easily eliminated at nonpermissive temperature,resulting in a markless mutant strain carrying a deletion at the clpP loci,which was verified by PCR and DNA sequencing.Results The result of the PCR analysis and DNA sequencing indicated that a part of the clpP gene was deleted.There was a loxP at this loci without the Sp resistance gene.Conclusion The markless clpP-deletion mutant of S.mutans was constructed successfully,which laid a foundation for further study of its biological function and its influence on the cariogenicity of S.mutans.

Genomics ; Medicine, Chinese Traditional

Retinopathy of prematurity (ROP) is a proliferative vascular retinal disease. Cryotherapy, laser photocoagulation, intravitreal injection of anti-vascular endothelial growth factor, scleral buckling surgery and vitrectomy are the main treatments. Treated with cryotherapy or laser photocoagulation or intravitreal injection of anti-vascular endothelial growth factor, patients with a history of ROP have thicker foveas, and the morphology of the fovea and the development of the retinal vessels in the macular area are affected, resulting in abnormal vision development. However, the specific mechanisms by which different treatments of ROP affecting the development of the macula are not yet clear. It still need further study with large samples to verify and explore, whether changes in the levels of intraocular vascular endothelial growth factor changing the process of normal macular development and how the abnormal development of the macula affects visual function.

Objective · To investigate the correlation between proportion of natural killer (NK) cells and dendritic cells (DCs) and liver injury in patients with chronic hepatitis B virus (HBV) infection. Methods · Peripheral blood samples were collected from 65 patients with chronic HBV infection and 10 healthy volunteers (HCs group). Flow cytometry was used to detect the proportion of peripheral NK cells and DCs. The patient were divided into asymptomatic HBV carrier (AsCs) group, chronic hepatitis B in low or moderate grade (CHB-LM) group, and chronic severe hepatitis B (CSHB)group.The relationship of the proportion of NK cells, the proportion of DCs, and the ratio of NK/DC with the degree of liver injury was analyzed. Results · The proportion of peripheral NK cells was significantly lower in CHB-LM group (9.29%±1.20%) and CSHB group (3.60%±0.79%) than that in HCs group (14.77%±2.90%) and AsCs group (14.05%±2.32%) (P=0.000). And the proportion of peripheral DCs was significantly higher in CHB-LM group (4.10%±1.18%) than that in HCs (1.67%±0.31%), AsCs (2.05%±0.46%) and CSHB groups (2.08%±0.41%) (P=0.000). The ratio of NK/DC was decreased in CSHB and CHB-LM groups compared to that in HCs and AsCs groups (P=0.000). The correlation analysis indicated the proportion of NK cells was negatively correlated with the levels of ALT, AST, TB and DB (r=-0.50, r=-0.49, r=-0.53, r=-0.51, P=0.000 for all) in patients with chronic HBV infection. Conclusion · The proportion of peripheral NK cells and the ratio of NK/DC in patients with chronic hepatitis B were decreased. The decrease of the frequency of NK cells and the ratio of NK/DC were associated with liver injury in patients with chronic HBV infection.

Shanghai district and county health system performance evaluation conceptual frameworkwas proposed based on health services system performance assessment frameworks raised by some countries and international organizations,and combined with Shanghai district and county health system characteristics.This framework contains two first grade indices and seven second grade indices:In the long term goals,'health','satisfaction' and 'disease risk protection' are the county's longterm effects of health system performance assessment dimensions; in the medium-term goals,the'accessibility','cost',' efficiency' and 'quality' are the county' s medium-term effects of health system performance assessment dimensions.This study aimed to evaluate Shanghai county health system's overall performance.Further study is needed in constructing its third grade indices.

Objective: To analyze the circulating endothelial cells (CECs) and circulating endothelial precursors (CEPs) in peripheral blood of tumor patients. Methods: CECs and CEPs were enumerated in 57 tumor patients and 15 healthy controls by 3-color flow cytometry. The serum level of angiogenesis related cytokines(VEGF, bFGF)was determined by ELISA method. Results: In tumor patients, mean value of CECs and CEPs was (0.378?0.047)% and (0.059?0.013)% respectively. The serum level of VEGF and bFGF were (295.58?59.56) ng/L and (28.73?7.40) ng/L. The amount of CECs/CEPs positively correlated with the serum level of VEGF and bFGF. Conclusions: The CECs/CEPs and serum level of VEGF and bFGF of tumor patients was higher than those of normal controls. VEGF and bFGF may participate into the course of endothelial progenitors mobilization.

Objective To explore the creation and control of measurement technique error on digital subtraction angiography (DSA). Methods The data was obtained from Advantx LCV Plus DSA system made by GE Corporation. We divided the screen into three areas, per area account for 1/3, ie, central area, middle area and outlying area. The enlargement rate or reduction rate of the target object was respectively calculated according to the different calibration, different height of the bed and different X-ray source to image distance (SID). Results The target object was enlarged gradually from the central area to the outlying area, and the lengthwise enlargement rate was more obvious than transverse. The different of target object measured by coin (diameter was 20.4 mm) with steel ball (diameter was 7.7 mm) was not significance, but the target object was underestimated significantly used the calibration by 4F catheter. When the target object was measured by the calibration in same area and same axis, the error of measurement technique was controlled rang from 1.0% to-2.5%. Conclusion This systematic investigation suggest that the screen was divided into the central area, middle area and outlying area will be beneficial to control DSA measurement error for the interventional physician. The target object was close to real size when it measured by transverse of the calibration, and the error was better controlled when the calibration was in the same area and same axis as the target object.