Objective; To study estrogen receptor gene Xbal and Pvu Ⅱ polymorphisms in patients with aggressive periodontitis (AgP). Methods; Xbal and Pvu Ⅱ DNA was extracted by Chelex-100 and amplified by PCR from buccal swabs of 48 cases of AgP patients and 60 normal controls. The PCR products were analyzed by polymerase chain reaction linked fragment length polymorphism (PCR-RFLP) assay. Results: There were significant differences of the distribution of Xba I genotype between AgP group and control group, female AgP group and female control group, male AgP group and male control group(P<0.05). There was no difference of Pvu D genotype distribution between patient group and control group (P>0.05). Multivariate Logistic Regression Analysis showed that male group was less susceptible to AgP than female group(OR =0. 352), the older was less susceptible to AgP than the younger(OR =0.950), and the xxXx genotype was less susceptible to AgP than XX genotype [OR(Xx) =0.224, OR(xx) = 0.678). Conclusion: Specific relationship is found between the susceptibility of AgP and the ER gene-Xbal polymorphism. People with XX genotype is more susceptive to AgP than xx, Xx genotypes.

OBJECTIVE To explore the canonical prevention and management method to improve the control quality and safety against hospital infection in outpatient operating room. METHODS To strengthen infection institution,nosocomial control,and operating room management actually,constitute effective disinfection,isolation,and deal of measure. RESULTS By strengthening quality of hospital outpatient operating room,to improve the medical care quality. CONCLUSIONS According to canonical scientific management,to favor the quality and safety of infection prevention in operating room.

OBJECTIVE To learn about the factors affecting the quality of the air in operating-rooms and discuss the methods of improving their air quality.METHODS The dynamic and static air bacteriology between laminar air flow operating-room and normal operating-room of a fertiary care level hospital of grade Ⅰ in Changchun were observed.RESULTS The passing rate of samples for air static bacteriology between two types of operating rooms at the begining of selective operations(T0) was without difference.At the begining of emergency operations,there was a disparity.The total number of bacteria in normal operating-room increased with the operating-time,but in the laminar flow operating-room,the total number of bacteria increased in fluctuations during the(T2) time(60 ming since operation begain),and descended dramatically during the(T3) time(90 min since operation).CONCLUSIONS The emergency and operation-time are the main factors affecting the air quality in operating-room and the cleaning air-condition could improve the air quality.

Objective To discuss the effect of dry powder from stone of Garcinia oblongifolia in south of the Five Ridges on refractory Ⅲ and Ⅳ stage bedsore.Methods 120 cases of patients with refractory Ⅲ and Ⅳ stage pressure sore were randomly divided into the treatment group and the control group with 60 cases in each group.The treatment group applied dry powder from stone of Garcinia oblongifolia in south of the Five Ridges,while the control group used conventional infrared irradiation plus chloramphenicol powder treatment method.The treatment effect was compared between two groups.Results There were significnat differences in clinical efficacy,pain relief and cure time between the treatment group and the control group,and the treatment group acquired better effect than the control group.Conclusions The clinical efficacy,pain relief and healing time of the treatment group in the treatment of refractory Ⅲ and Ⅳ stage pressure ulcer was superior to the control group,and without skin lesions and human adverse reaction,and with the advantages of simple operation,quick,good curative effect,no pain to the patient,easy to accept and no toxic side effect.

Objective How to examine the function of transplanted kidney more accurately and sensitively has become a fo?cus of clinical attention.This study was to investigate the value of 99Tcm?DTPA renal dynamic imaging in evaluating the function of trans?planted kidney by glomerular filtration( GFR) after transplantation. Methods Patients were collected from August 2015 to January 2016 in Nanjing General Hospital of Nanjing Military Region. GFR was measured in 74 cases of kidney transplantation patients using the 99Tcm?DTPA renal dynamic imaging.According to the range of serum creatinine,we divided the 74 cases into two groups:the normal group( n=17) and abnormal group( n=57) . We analysed the GFR between two groups and the correlation of GFR and serum creatinine .Transplanted kidney puncture biopsy was operated in 55 patients. We analysed the pathological results and compared the GFR. Results Compared with the abnormal group (GFR=37.7±15.4 mL/min),the average GFR was higher in the normal group(GFR =61.7±15.6 mL/min)(P<0.001). The average GFR(43.2±18.4 mL/min) measured by 99Tcm?DTPA renal dynamic imaging in 74 cases was positive correlated with average serum creatinine(1.84±0.82 mg/dL)(r=-0.673, P<0.001).Compared with patients with abnormal pathological results(GFR=39.6±16.5mL/min), normal people had higher average GFR ( GFR=59. 2 ± 8. 5 mL/min ) ( P=0. 040 ) . Conclusion 99 Tcm?DTPA renal dynamic imaging can reflect the function of transplanted kidney sensitively, it is one of the noninvasive examination to monitor the function in transplanted kidney.

OBJECTIVETo establish a rapid method of loop-mediated isothermal amplification (LAMP) for detecting enterohemorrhagic Escherichia coli (EHEC) O157:H7.

METHODSSix primers that specifically recognized the rfbE gene of EHEC O157:H7 were designed. Under the optimized reaction conditions, LAMP and PCR were evaluated for the sensitivity and specificity in the detection of 39 laboratory samples of EHEC O157:H7 strains, and their detection results of contaminated fresh pork samples were compared.

RESULTSLAMP assay correctly identified all the 7 EHEC O157:H7 strains and showed negative results for all the 32 non-EHEC O157:H7 strains. The detection limit of LAMP was much lower than that of rfbE-PCR (10 vs 100 cfu/ml). In the detection of the contaminated pork samples, both LAMP and PCR yielded results consistent with those by the conventional detection method.

CONCLUSIONThe rfbE-based LAMP assay can serve as a rapid, sensitive, specific and low-cost means for detecting EHEC O157:H7 strain.

DNA, Bacterial ; Escherichia coli O157 ; isolation & purification ; Nucleic Acid Amplification Techniques ; methods ; Polymerase Chain Reaction ; methods ; Sensitivity and Specificity

Objective:To explore the effect of a new teaching mode, which includes bridge-in, outcome, pre-test, participation, post-test and summary (BOPPPS), on the online teaching of radiobiology related knowledge for cancer radiotherapy practitioners.Methods:Taking the cell survival curve, cell cycle and radiosensitivity as examples, the radiotherapy practitioners in multiple university-affiliated hospitals were organized to carry out a multicenter prospective randomized control study. All practitioners were randomly divided into BOPPPS group and control group. The courses for BOPPPS group were designed as an online classroom, consisting of pre-class preparation, online teaching and post-class stages. The online teaching stage included video viewing, basic knowledge learning, literature discussion, group discussion and others. The control group employed the traditional teaching mode. The χ2 test was used to compare the consistency of general conditions between the two groups, and nonparametric test was used to compare the differences in scores between two or more groups. Results:The score of the pre-class test was 58.56 ± 0.99. Post-class average score for BOPPPS group was 85.48±0.85 and for control group 77.79±1.10, with the former being higher 7.69 ( Z=5.31, P<0.001) than the latter. The average answer time was (296.62±15.40) s for BOPPPS group and (386.41±21.27) s for control group, with the former being shorter 89.79 s ( Z=3.34, P=0.001) than latter. Subgroup analysis shown that the scores of BOPPPS group were significantly rising, regardless of whether or not the students had studied radiobiology courses. Among the students who have not studied these courses, the scores were rising greatly. Moreover, From the analysis of different positions, it was found that both the scores of BOPPPS group and control group have risen, especially for doctors, deputy chief doctors, physicists and technicians. There were also statistically differences between different degrees, with significantly rise in scores for undergraduate and doctoral students ( Z=3.64, 4.18, P<0.001). Conclusions:The flexible application of BOPPPS teaching mode to the online education of such boring disciplines, like radiobiology, is of great significance to raise the theoretical basis of radiotherapy practitioners.

OBJECTIVE To study the effects of bergapten in the treatment of liver fibrosis and its mechanism based on serum metabolomics. METHODS Forty mice were divided into normal control group （0.5% carboxymethyl cellulose sodium solution）， model group （0.5% carboxymethyl cellulose sodium solution）， and BP low-dose and high-dose groups （50， 100 mg/kg）， with 10 mice in each group. Except for the normal control group， the other three groups were all treated with carbon tetrachloride to induce liver fibrosis model； they were given relevant medicine/solution intragastrically， once a day， for consecutive 8 weeks. After the last medication， the levels of alanine aminotransferase （ALT） and aspartate aminotransferase （AST） in serum were detected， and liver pathological changes were observed； the expressions of α-smooth muscle actin （α-SMA） and Collagen Ⅰ were detected in liver tissue； the serum of the mice was collected for metabolomics analysis. RESULTS Compared with the model group， serum levels of ALT and AST and protein expressions of α-SMA and Collagen Ⅰ in liver tissue were decreased significantly in BP high-dose and low-dose groups （P＜0.05）， while liver fibrosis was improved significantly. Meanwhile， metabolomics analyses showed that there were a total of 175 serum differential metabolites in the BP high-dose group and model group， of which 18 substances were upregulated and 157 substances were downregulated； the main metabolic pathways involved in bergapten intervention were pyrimidine metabolism， butanoate metabolism， fatty acid synthesis， tyrosine metabolism， β-alanine metabolism， nicotinic acid and nicotinamide metabolism， glutathione metabolism， etc. CONCLUSIONS BP is effective in the treatment of liver fibrosis by regulating pyrimidine metabolism， butanoate metabolism， glutathione metabolism and so on in rats with liver fibrosis.