Objective To study genotyping and molecular epidemiology distribution of GBS pathogenic strains of GBS positive pregnant women in Guangzhou,for GBS pathogenic strains of rapid molecular diagnosis and epidemiological surveillance pro-vide certain theoretical basis and method.Methods In the Guangzhou area,used multi stage stratified sampling method col-lecting GBS positive pregnant women’s reproductive tract specimens from January to December 2015,drug sensitivity quality control standard strains:Streptococcus pneumoniae (ATCC49619)and Staphylococcus aureus (ATCC25923),took culture of bacterial,strain,identification,DNA extraction,PCR,gene detection method,through the relevant software for data analy-sis,analyzed GBS strains of gene and molecular epidemiology.Results In the study,collected 2 812 samples of secretions,af-ter identification of strains isolated from 178 strains of pathogenic GBS strains,the detection rate was 6.33%.GBS patho-genic strains to linezolid vancomycin,penicillin,nitrfurantion and other antimicrobial drug resistance rate was 0,GBS parho-genic strains to ampicillin,ciprfloxacin moxifloxacin and levofloxacintesistant parts,the restance rates were 1.1%,16.9%, 18.0% and 22.5%,but GBS pathogenic strains to erythromycin,clindamycin tetracydine antibiotics showed a high resistance rate,the resistance rates were 50.6%,47.8%(of which 20 cases of erythromycin induced clindamycin resistance accouted for 23.5%)and 73.0%.Among them,65 strains of GBS detected the mreA gene,56 strains of GBS detected the ermB gene,36 strains of GBS detected the mefA gene,28 strains of GBS detected the mefE gene,5 strains of GBS detected the ermA gene, ermC gene was not detected in the gene.Among them,carried five multidrug resistance gene of 3 strains (1.6 9%)and 4 kinds of resistant gene carried with 15 strains (8.43%),carried three resistance genes of 19 strains (10.67%),2 kinds of resistant gene carrying a 25 strains (14.04%),carried the resistance gene of 5 strains (2.81%),did not carry resistance gene of 1 strain (0.56%).The nucleotide sequences of the five drug resistance genes were 100%,and no gene mutation oc-curred.Conclusion The main GBS disease resistant gene was mreA,ermA,ermB,mrfA,mefE and its nucleotide sequence homology was 100%.The clinical need to strengthen the detection of resistant gene and molecular level and guide clinical more scientific and rational drug use.

Objective To investigate the effects of early parenteral feeding with glutamine on nitrogen balance and clinieal prognosis in Pationts with acute severe pancreatitis.Methods120 acute severe pancreatitis patients with Ranson scale≥3 were studied.Patients were randomized to receive either an early parenteral diet(control group,n=60) or the same formula with glutamine added(study group,n=60).The diets were isocaloric and isonitrogenous [35 kcal ? kg-1 ? day-1 and 1.5g of protein/(kg-1 ? d)].Main outcome measures were the APACHE-Ⅱ scale,incidence of infection,the length of stay in the intensive care unit and the number of days requiring mechanical ventilation,and monitor the nitrogen balance.ResultsThe two groups were homogeneous in gender,age,nutritional status and admission.There was no mortality during the study period.The two group have no statistic defference in nitrogen balance of 4.7 day.The median(range) number of infections per patient was significantly greater(P

Objective To study the effects and related mechanism of low-dosed methyl-mercury chloride (MMC) on the epithelial apoptosis of fetal mice intestine. Methods Pregnant mice on E12.5 d and E13.5 d were injected with different doses of MMC (0, 1, 2, 4 mg/kg) intraperitoneally. After 48 h, their duodenum and colon were dissected out and sliced into the paraffin sections. Some sections were stained with HE to count the numbers of apoptotic bodies (NAB) with stereological method. The others were stained with the immunohistochemical method to observe the expression of apoptosis-associated proteins Bcl-2, Bax and immediate early gene c-fos. Results ①In all experimental groups, the NAB in the epithelium were higher than that of control groups (P

Objective To analyse distribution and antibacterial resistance status of pathogenic bacteria isolated from blood cul‐tures of hospitalized infants ,in order to provide references for rational use of antimicrobial agents in the treatment of bloodstream infection .Methods A total of 299 strains of pathogenic bacteria isolated from positive blood culture specimens from infants(3 or less than 3 months of age) suspected with bloodstream infections in this hospital from January 2011 to May 2015 were collected ,the bacteria identification and drug sensitivity test were carried out by using the VITEK 2 Compact automatic microorganism analyzer . The composition and antibacterial resistance of these isolates were analyzed .Results Among the 299 strains of pathogenic bacteria , there were 169 strains of gram‐positive cocci(accounted for 56 .5% ) ,including 95 strains of coagulase negative Staphylococcus (ac‐counted for 31 .8% ) which was the main isolates ,and followed by 28 strains of Staphylococcus aureus(accounted for 9 .4% );there were 120 strains of gram‐negative bacilli (accounted for 40 .1% ) and mainly were Escherichia coli (53 strains ,accounted for 17 .7% );otherwise ,there were 8 strains of fungi (accounted for 2 .7% ) and 2 strains of gram‐positive bacillus (accounted for 0 .7% ) .The results of drug susceptibility test indicated that the gram‐positive cocci had multiple drug resistance to antibacterial a‐gents except for vancomycin and linezolid;the gram‐negative bacilli shown multiple drug resistance except for amikacin ,imipenem and meropenem .The fungus ,however ,displayed high sensitivty to all antifungal drugs .Conclusion Gram‐positive and gram‐nega‐tive bacteria are the main pathogens of hospitalized infants with bloodstream infection ,and are severely resistant to antibacterial a‐gents .Rational use of antimicrobial agents should be recommend for improving clinical efficacy and prohibiting the emergence of drug‐resistant strains .

Objective To investigate the efficacy of different adding times,treatment courses and doses of bifidobacterium and lactobacillus triple live bacteria in Helicobacter pylori (Hp) eradication.Methods A total of 280 patients Hp-infected were enrolled and randomly assigned to five groups.Group A received lansoprazole 30 mg,clarithromycin 500 mg and amoxicillin 1,000 mg bid for 14 days;group B received bifidobacterium and lactobacillus triple live bacteria 2,000 mg tid for 14 days followed by regimen of group A for another 14 days;group C1 received regimen of group A with addition of bifidobacterium and lactobacillus triple live bacteria 2,000 mg bid for 14 days;group C2:regimen of group A with addition of bifidobacterium and lactobacillus triple livc bacteria 2,000 mg tid for 14 days;and group D received regimen of group C2 followed by bifidobacterium and lactobacillus triple live bacteria 2,000 mg tid for another 14 days.4 weeks after end of treatment,Hp eradication was assessed by 13C-urea breath test.Adverse effects during the courses of treatment were recorded.Results A total of 252 (90.0％) patients completed the treatment.The completion rate in group A,B,C1,C2,and D were 78.6％ (44/56),92.9％ (52/56),87.5％ (49/56),96.4％ (54/56),and 94.6％ (53/56) respectively;the completion rate was significantly higher in group B,C2 and D than in group A (P ＜ 0.05),but there were no differences among groups B,C2 and D (P ＞ 0.05).According to intention-to-trcat (ITT) analysis,the eradication rate was 62.5％,80.4％,69.6％,85.7％,and 87.5％ in groups A,B,C1,C2,and D respectively.The eradication rate in groups B,C2 and D was significantly higher than that in group A (x2 =4.375,P =0.036;x2 =7.864,P =0.005;x2 =9.333,P =0.002),and the eradication rate was higher in group C2 than in group C1 (x2 =4.171,P =0.041),but there were no differences among groups B,C2 and D (P ＞0.05).As for per-protocol (PP) analysis,the eradication rate was 79.5％,86.5％,79.6％,88.9％ and 92.5％ in groups A,B,C1,C2,and D respectively,but no significant statistical differences were found among the five groups (P ＞ 0.05).Adverse effects included nausea,bloating,taste distortion,anorexia and constipation.The rate of adverse effects in groups A,B,C1,C2 and D was 67.9％ (38/56),26.8％ (15/56),35.7％ (20/56),21.4％ (12/56),and 17.9％ (10/56) respectively.The incidence rate was significantly lower in groups B,C2 and D than in group A (P ＜ 0.05),but no significant statistical differences were found among groups B,C2,and D (P ＞ 0.05).Conclusions The triple therapy combined with bifidobacterium and lactobacillus triple live bacteria can obviously decrease the adverse effects and improve patient compliance,thereby increasing the rate of Hp eradication.14-day therapy with probiotics is the best regimen.

Background:With the emergence of bacterial resistance,the efficacy of Helicobacter pylori(Hp)eradication therapy is decreasing in recent years. After the previous failed course of eradication therapy,the possibility of failure of re-eradication therapy is greater. Therefore,choosing the rescue therapy for Hp re-eradication is particularly important. Aims:To investigate the efficacy of levofloxacin-based triple therapy combined with probiotics as a rescue therapy for Hp re-eradication. Methods:A total of 192 patients with a previous failed course of standard triple therapy for Hp eradication were enrolled and randomly assigned into four groups. Group A:lansoprazole 30 mg + amoxicillin 1 000 mg + levofloxacin 200 mg bid for 14 days;group B:regimen of group A with the addition of bismuth potassium citrate 600 mg bid for 14 days;group C:bifidobacterium and lactobacillus triple live bacteria 2 000 mg tid for 14 days followed by regimen of group A for 14 days;group D:regimen of group A with the addition of bifidobacterium and lactobacillus triple live bacteria 2 000 mg tid for 14 days. At 4 weeks after end of treatment,Hp eradication was assessed by 13 C-urea breath test. Adverse effects during the course of treatment were recorded. Results:A total of 177(92. 2% )patients completed the study,the completion rates in group A,B,C and D were 87. 5%(42 / 48),83. 3%(40 / 48),97. 9%(47 / 48)and 100% , respectively;the completion rates in group C and D were significantly higher than those in group A and B(P < 0. 05). By intention-to-treat(ITT)analysis,the eradication rates of group A,B,C and D were 60. 4% ,68. 8% ,81. 3% and 83. 3% ,respectively;the eradication rates in group C and D were significantly higher than that in group A(χ2 = 5. 042, P = 0. 045;χ2 = 6. 235,P = 0. 013). By per-protocol(PP)analysis,the eradication rates of group A,B,C and D were 69. 0% ,82. 5% ,83. 0% and 83. 3% ,respectively;no statistically significant differences were found among the four groups(P > 0. 05). Adverse effects included constipation,taste distortion,bloating and anorexia,the incidences of adverse effects in group A,B,C and D were 79. 2% ,95. 8% ,29. 2% and 22. 9% ,respectively;the incidences in group C and D were significantly lower than those in group A and B(P < 0. 05). Conclusions:Levofloxacin-based triple therapy combined with bifidobacterium and lactobacillus triple live bacteria can decrease the adverse effects of traditional triple and quadruple therapies and improve the patient compliance,thus increases the efficacy of rescue therapy for Hp re-eradication.

OBJECTIVE: To study the radition injury of tracheal mucous membrane tissue after interstitial implanted radioactive 125I in normal rabbit,improve the safety of clinical application. METHOD: Sixty New Zealand rabbits, weighing 2.15-2.30 kg, were randomly divided into 1 w, 1 m, 2 m, 4 m and the control group, the control group was further divided into four subgroups. The 0.8mCi 125I seeds were implanted into the tissue by the first tracheal ring in the treatment groups and nonradioactive seeds were implanted in the control group. Taking the tracheal mucous membrane tissue for pathological examination by HE staining to observe the mucosal injury and VEGF, Pan-Cadherin immunohistochemical staining to observe the expression in differernt time. RESULT: Immunohistochemical staining: VEGF and Pan-Cadherin have statistically significant differences in the expression on different time, the expression is dynamic. CONCLUSION The expression of VEGF and Pan-Cadherin reflect the radioactive 125I seed has little influence on normal trachea tissue and the damage can be repaired by the regeneration of the basal cell.
Animals ; Brachytherapy ; adverse effects ; Iodine Radioisotopes ; adverse effects ; Rabbits ; Radiation Injuries ; pathology ; Trachea ; pathology ; radiation effects

Objective: As a gate-keeper enzyme link, pyruvate dehydrogenase E1 subunit alpha (PDHA1) functions as a key regulator during glycolysis and the mitochondrial citric acid cycle, which has been reported in several tumors. Nevertheless, the effects of PDHA1 on biological behaviors and metabolism remain unclear in cervical cancer (CC) cells. The study aims to explore the PDHA1 effects on glucose metabolism in CC cells and its possible mechanism. Methods: We first determined the expression levels of PDHA1 and activating protein 2 alpha (AP2α) as a PDHA1 potential transcription factor. The effects of PDHA1 in vivo were evaluated through a subcutaneous xenograft mouse model. Cell Counting Kit-8 assay, 5-ethynyl-2′-deoxyuridine (EdU) labeling assay, Transwell invasion assay, wound healing assay, Terminal deoxynucleotidyl transferase dUTP nick end labeling assay and flow cytometry were performed in CC cells. Oxygen consumption rate (OCR) levels were determined to reflect aerobic glycolysis level in gastric cancer cells. Reactive oxygen species (ROS) level was measured with 2′, 7′-dichlorofluorescein diacetate kit. The relationship between PDHA1 and AP2α was examined by conducting chromatin immunoprecipitation assay and electrophoretic mobility shift assay. Results: In CC tissues and cell lines, PDHA1 was downregulated, while AP2α was upregulated. Overexpression of PDHA1 remarkedly inhibited the proliferation, invasion and migration of CC cells, and tumor growth in vivo, as well as promoted OCR, apoptosis and ROS production. Moreover, AP2α directly bound to PDHA1 within suppressor of cytokine signaling 3 promoter region to negatively regulate PDHA1 expression level. What is more, PDHA1 knockdown could effectively reversed the AP2α silencing-mediated suppressive effects on cell proliferation, invasion, migration, and the promotive effects of AP2α knockdown on OCR, apoptosis and ROS production. Conclusions Our findings demonstrate that AP2α negatively regulated PDHA1 via binding to PDHA1 gene promoter to promote malignant CC cell behaviors, which may provide a potential approach for CC therapeutics.

OBJECTIVE：To establ ish artificial neural netw orks（ANN）model to predict the interferon in the treatment of chronic hepatitis B （CHB），and to provide evidence for selecting suitable CHB therapy plan in clinic. METHODS ：The clinical data of 92 CHB patients treated by interferon ，from Guangzhou Eighth People ’s Hospital were retrospectively analyzed from Jul. 2011 to Dec. 2019. The basic information ，biochemical indexes ，blood routine indexes and virological markers of patients were collected. According to the effect of interferon ，the patients were divided into response group （73 cases）and non-response group （19 cases）. Minitab 18.0 software was used for multivariate Logistic regression analysis to screen the factors influencing the efficacy of interferon. Neurosolutions 5.0 software was used to randomly select 30％ of patients with CHB （27 cases）as the test group to establish and verify the ANN model. RESULTS ：The mean platelet volume ，platelet distribution width ，direct bilirubin ， hepatitis B e antigen and hepatitis B virus DNA more than 4×107 IU/mL had significant effect on interferon response （P＜0.05）. The accuracy ，specificity and area under characteristic curve of ANN test group were significantly higher than those of Logistic regression（P＜0.05）. CONCLUSIONS ：ANN model is accurate in predicting the efficacy of interferon in the treatment of CHB.

OBJECTIVESince 1986, the reference of birth weight for gestational age has not been updated. The aim of this study was to set up Chinese neonatal network to investigate the current situation of birth weight in China, especially preterm birth weight, to develop the new reference for birth weight for gestational age and birth weight curve.

METHODA nationwide neonatology network was established in China. This survey was carried out in 63 hospitals of 23 provinces, municipalities and autonomous regions. We continuously collected the information of live births in participating hospitals during the study period of 2011-2014. Data describing birth weight and gestational age were collected prospectively. Newborn's birth weight was measured by electronic scale within 2 hours after birth when baby was undressed. The evaluation of gestational age was based on the combination of mother's last menstrual period, ultrasound in first trimester and gestational age estimation by gestational age scoring system.

STATISTICAL ANALYSISthe growth curve was drawn by using LMSP method, which was conducted in GAMLSS 1.9-4 software package in R software 2.11.1.

RESULTA total of 159 334 newborn infants were enrolled in this study. There were 84 447 male and 74 907 female. The mean birth weight was (3 232 ± 555) g, the mean birth weight of male newborn was (3 271 ± 576) g, the mean weight of female newborn was (3 188 ± 528) g. The test of the variables' distribution suggested that the distribution of gestational age and birth weight did not fit the normal distribution, the optimal distribution for them was BCT distribution. The Q-Q plot test and worm plot test suggested that this curve fitted the distribution optimally. The male and female neonatal birth weight curve was developed using the same method.

CONCLUSIONUsing GAMLSS method to establish nationwide neonatal birth weight curve, and the first time to update the birth weight reference in recent 28 years.