Construction of a caries diagnosis model based on microbiome novelty score / 华西口腔医学杂志

OBJECTIVES@#This study aimed to analyze the bacteria in dental caries and establish an optimized dental-ca-ries diagnosis model based on 16S ribosomal RNA (rRNA) data of oral flora.@*METHODS@#We searched the public databa-ses of microbiomes including NCBI, MG-RAST, EMBL-EBI, and QIITA and collected data involved in the relevant research on human oral microbiomes worldwide. The samples in the caries dataset (1 703) were compared with healthy ones (20 540) by using the microbial search engine (MSE) to obtain the microbiome novelty score (MNS) and construct a caries diagnosis model based on this index. Nonparametric multivariate ANOVA was used to analyze and compare the impact of different host factors on the oral flora MNS, and the model was optimized by controlling related factors. Finally, the effect of the model was evaluated by receiver operating characteristic (ROC) curve analysis.@*RESULTS@#1) The oral microbiota distribution obviously differed among people with various oral-health statuses, and the species richness and species diversity index decreased. 2) ROC curve was used to evaluate the caries data set, and the area under ROC curve was AUC=0.67. 3) Among the five hosts' factors including caries status, country, age, decayed missing filled tooth (DMFT) indices, and sampling site displayed the strongest effect on MNS of samples (P=0.001). 4) The AUC of the model was 0.87, 0.74, 0.74, and 0.75 in high caries, medium caries, low caries samples in Chinese children, and mixed dental plaque samples after controlling host factors, respectively.@*CONCLUSIONS@#The model based on the analysis of 16S rRNA data of oral flora had good diagnostic efficiency.

Analysis of research hot-spots and development trends of county-level TCM hospitals in China based on CiteSpace / 国际中医中药杂志

Objective:To analyze the current development status, research hot-spots and development trends of county-level Chinese hospitals in China.Methods:By retrieving the papers of county-level Traditional Chinese Medicine (TCM) hospitals in China National Knowledge Infrastructure (CNKI), Chinese Science and Technology Periodicals Full-text Database (VIP), Wanfang and China Biomedical Database (SinoMed ) with CiteSpace 5.5.R2 software to draw maps of the author, institution and keyword and make analysis.Results:A total of 598 papers are included in this study, and the trend of publications shows an upward trend and then a downward trend. Researchers conduct research in the form of forming research teams. The research institutions are mainly medical colleges and scientific research institutions. The most frequently showed keyword is "medical reform". The keyword knowledge map shows that the research content mainly involves medical reform, problem analysis and countermeasures, economic operation efficiency, TCM service capability, data envelopment analysis and so on.Conclusions:The county-level TCM hospitals generally show sound development trend in China. The research trend is dominated by county-level TCM hospitals. Scale development has been transformed into the study of hospital operation efficiency. County-level TCM hospitals need to start from their own actual conditions, strengthen cooperation in the form of teams and strengthen academic cooperation among institutions, so as to realize the basic TCM services for ordinary people.

Function, structure and catalytic mechanism of sucrose phosphate synthase: a review / 生物工程学报

Sucrose is a natural product occurs widely in nature. In living organisms such as plants, sucrose phosphate synthase (SPS) is the key rate-limiting enzyme for sucrose synthesis. SPS catalyzes the synthesis of sucrose-6-phosphate, which is further hydrolyzed by sucrose phosphatase to form sucrose. Researches on SPS in recent decades have been focused on the determination of enzymatic activity of SPS, the identification of the inhibitors and activators of SPS, the covalent modification of SPS, the carbohydrate distribution in plants regulated by SPS, the mechanism for promoting plant growth by SPS, the sweetness of fruit controlled by SPS, and many others. A systematic review of these aspects as well as the crystal structure and catalytic mechanism of SPS are presented.

Clinical significance of mycoplasma pneumoniae-DNA load detection in alveolar lavage fluid of children with refractory mycoplasma pneumoniae pneumonia / 中国小儿急救医学

Objective:To investigate the clinical significance of mycoplasm pneumoniae-DNA(MP-DNA) load detected in bronchoalveolar lavage fluid of children with refractory mycoplasma pneumoniae pneumonia(RMPP) in the assessment of the condition.Methods:A total number of 98 hospitalized children with RMPP diagnosed in the Department of Pediatric Respiratory of Shengjing Hospital of China Medical University from May to November in 2018 were selected as the subjects.Bronchoscopy was performed on each subject and the alveolar lavage fluid was collected to detect the MP-DNA load quantitatively.According to the test results, all children were divided into three groups: high-load group(>10 6/ml, 28 cases), medium-load group(10 3 to 10 6/ml, 54 cases), and low-load group(≤10 3/ml, 16 cases). The clinical manifestations, relevant laboratory data, imaging data, and bronchoscopy findings of the children in different load groups were compared. Results:Compared with the low-load group and medium-load groups, the level of C-reactive protein was the highest in the high-load group with statistical significance( P<0.05). The difference of lactate dehydrogenase levels among the three groups was statistically significant( P=0.001). The positive incidences of nodular protuberances, mucosal erosion and necrosis, bronchial inflammatory stenosis and mucus plugs occlusion in the high-load group were 35.7%, 32.1% and 64.3%, respectively, which were significantly higher than those in the medium-load group(13.0%, 5.6%, 38.95) and low-load group(0, 0, 12.5%), and the differences were statistically significant( P<0.05). The imaging manifestation of large areas consolidation/lung atelectasis and pleural effusion in the high-load group were 100% and 60.7%, respectively, which were significantly higher than those in the medium-load group(61.1%, 27.8%)and low-load group(25.0%, 12.5%), and the differences were statistically significant( P<0.05). Compared with the low-load group and medium-load group, the hospitalization days was the longest in the high-load group, and the fever clearance time after the application of macroclides was also the longest( P<0.05). Conclusion:The MP-DNA load of children with RMPP is closely related with the clinical features.The clinical manifestations of children with higher DNA-load are more serious.The level of local MP-DNA load can guide clinicians to use drugs rationally, better predicting the outcome of the disease.

Application of the Nivolumab in the treatment of advanced non-small cell lung cancer / 国际肿瘤学杂志

Lung cancer has the highest morbidity and mortality among malignant tumors in our country.The treatment researches related to non-small cell lung cancer (NSCLC) such as targeted therapy and immunotherapy are the research hotspots in recent years.Nivolumab is the first programmed death-1 (PD-1)inhibitor which is allowed to enter clinical trials,and it is also the first approved drug for tumor immunotherapy in China.In June 2018,Nivolumab injection was marketed in China,and it was used in the second-line treatment for the patients with advanced NSCLC,opened up a new era of the lung cancer treatment in our country.Review the clinical research related to the Nivolumab and NSCLC,summarizing usage,dosage,adverse reactions,will provide a help for clinical application,bring more benefits for patients at the same time.

Research progress of MP-DNA load in Mycoplasma pneumoniae pneumonia / 国际儿科学杂志

Mycoplasma pneumoniae pneumonia is one of the most common community-acquired pneu-monia in children. Local MP-DNA load objectively reflects the balance of the immune clearance between the pathogen and host. In recent years,scholars have used different quantitative detection of MP-DNA to conduct a lot of research on different objects. It has been found that MP-DNA load can contribute to the early diagnosis of Mycoplasma infection and has association with the severity of the disease,it may guide the rational administra-tions for clinicians and can better predict the prognosis.

Value of ultrasonic calcifications in differential diagnosis of thyroid papillary carcinoma in Hashimoto's thyroiditis background / 中国基层医药

Objective To study the clinical value of ultrasonic calcifications in differential diagnosis of thyroid papillary carcinoma in Hashimoto''s thyroiditis background,to provide basis for clinical diagnosis and treatment.Methods The clinical data of 800 patientss with thyroid nodules who were examined by pathological examination were retrospectively analyzed.All patients underwent ultrasound examination,180 cases with Hashimoto''s thyroiditis were included in the study group,620 cases without Hashimoto''s thyroiditis were included in the control group.The gold standard was the result of pathology.The value of ultrasonography and calcifications for the identification of Hashimoto''s thyroiditis and thyroid papillary carcinoma was compared.Results The average diameter of the study group was (10.78±2.16)mm,which of the control group was (11.98±3.25)mm,there was no significant difference(t=2.153,P=0.083).The accurate rate of ultrasound in the differential diagnosis of benign thyroid nodules and papillary thyroid carcinoma in the study group was 76.67％(138/180),which in the control group was 80.81％(501/620),the difference was not statistically significant(χ2=0.898,P=0.098).There was no significant difference in coarse calcification rate and micro calcification rate of malignant nodules between the two groups(χ2=0.558,P=0.175).In the study group,the rate of micro calcification in malignant nodules was 12.07％,which was significantly higher than 53.13％ in benign nodules(χ2=32.142,P=0.001).In the control group,the micro calcification rate and coarse calcification rate of malignant nodules were 49.28％ and 12.08％,respectively,which were higher than 19.13％ and 6.05％ of benign nodules (χ2=67.368,7.056,P=0.001,0.009).The coarse calcification rate of benign nodules and malignant nodules in the study group were 6.25％ and 11.21％,respectively,there was no significant difference(χ2=1.098,P=0.062).Conclusion Whether associated with Hashimoto''s thyroiditis has no influence in the ultrasound differential diagnosis of thyroid papillary carcinoma,more micro calcification occurs in malignant nodules,but without the background of Hashimoto''s thyroiditis,coarse calcification can also be seen in malignant nodules.

Determination of Content and Related Substances of Troxipite Tablets by HPLC / 中国药师

Objective:To establish a method for the determination of content and related substances of troxipite tablets by HPLC. Methods:A Waters Symmetry-C18 (150 mm × 4. 6 mm,5 μm) column was used. The mobile phase was methanol -0. 4% phosphoric acid solution (50∶50). The flow rate was 1. 0 ml·min-1. The detection wavelength was 260nm. The column temperature was 35℃and the injection volume was 20 μl. Results:The linear range of troxipite was 3-75 μg·ml-1(r=0.999 7). The average recovery was 99. 7%,RSD=0. 95%(n=9). Conclusion:The method is simple, accurate and specific, and can be used in the quality control of troxipite tablets.

The expression of circulating microRNA-595 in patients with hepatitis B virus-related liver failure and its relationship with disease prognosis / 中华传染病杂志

Objective To measure the expression of circulating microRNA (miRNA)in patients with hepatitis B virus (HBV)-related liver failure and its relationship with disease prognosis.Methods The miRNA expressions in serum of 5 patients with HBV-related liver failure and 5 healthy control subjects were compared using Exiqon miRCURY LNATM miRNA microarray.The sera from 20 patients with chronic hepatitis B (CHB),20 patients hepatitis B related cirrhosis,50 patients with HBV-related liver failure and 40 healthy persons in Ruijin Hospital were collected.The relative expression of miRNA-595 was measured using quantitative real-time polymerase chain reaction (PCR).The relative expressions of miRNAs among groups were analyzed using student t test,the correlations were analyzed by Pearson and Spearman correlation.Results Microarray informed that 92 miRNAs changed significantly in patients with HBV-related liver failure,and miRNA-595 increased most significantly.The results of real-time PCR showed that the relative expressions of miRNA-595 ,miRNA-300 and miRNA-122 were 6.03 (t=3.134, P =0.003),3.12 (t=7.221 ,P <0.01)and 2.77 (t=2.671 ,P =0.021),which were higher compared to those in healthy control group.In the analysis of the relationship between miRNA-595 expression and disease prognosis in patients with HBV-related liver failure,the relative expressions of miRNA-595 in patients with CHB,hepatitis B related cirrhosis and HBV-related liver failure were 2.26 (t =3.780,P =0.001),3.32 (t = 6.111 ,P < 0.01)and 6.03 (t = 3.134,P = 0.003),respectively,which were all increased compared to that of the healthy control.The relative expression of miRNA-595 of patients with HBV-related liver failure was 2.66 times (t=2.450,P =0.043)higher than that of patients with CHB. When dividing patients according to prothrombin activity,miRNA-595 increased significantly in patients with early stage liver failure.When dividing patients according to model of end-stage liver disease (MELD) score,MELD score was positive correlated with the expression of miRNA-595 when MELD score was under 30 (r=0.673,P =0.004).The expression of serum miRNA-595 in survival group (11 .08,n=23) was higher than that in non-survival group (3.67,n = 27,t =4.309,P =0.041).Conclusions The expressions of miRNA595 ,miRNA-300 and miRNA-122 are all increased in patients with HBV-related liver failure,especially the expression of circulating miRNA-595 at early stage of the disease.The miRNA-595 may be used as a new serum biomarker for monitoring the severity of disease.