Objective In order to obtain small molecule compounds with novel structure and good biological activity, the secondary metabolites of polar sponge-symbiotic Streptomyces sp. LHW11-07 were studied. Methods The fermentation product of Streptomyces sp. LHW11-07 was isolated and purified by gel column chromatography, silica gel column chromatography, reversed-phase medium pressure column chromatography and high performance liquid chromatography. The structures of the monomeric compound were identified by modern spectroscopic methods such as mass spectrometry, nuclear magnetic resonance and related literature reports. Results A total of nine compounds were isolated from the fermentation of this strain, which were cyclo-(L-Tyr-L-Trp) (1), cyclo-(L-Trp-L-Ser) (2), cyclo-(D-Tyr-D-Pro) (3), cyclo-(L-Tyr-L-Phe) (4), cyclo-(L-Tyr-L-Leu) (5), albaflavenol B (6), β-adenosine (7), N-formylantimyic acid methyl ester (8) and conglobatin A (9). Conclusion Compounds 1 and 2 were isolated from Streptomyces sp. for the first time.

Objective:To investigate the immune effects of Clostridium difficile toxoid B (CdtB) vaccine formulated with different mucosal adjuvants through microneedle immunization, and to provide ideas for the prevention and treatment of Clostridium difficile infection. Methods:CdtB vaccine was prepared with purified Clostridium difficile toxin B(TcdB) after formaldehyde detoxification. Female BALB/c mice were immunized with different doses of vaccine alone or in combination with mucosal adjuvants. The titers of specific serum IgG and fecal IgA were detected at 0 d, 7 d, 14 d, 28 d and 42 d after immunization. The protective effects of CdtB vaccine were evaluated by cell neutralization assay and Clostridium difficile challenge infection. Results:(1) With the increase of immune dose, the mice immunized with CdtB vaccine alone by microneedle not only produced better serum specific IgG, but also had higher level of IgA in feces. (2) When the mice were immunized with CdtB vaccine containing LT or CTB adjuvant by microneedle, the trend of serum specific IgG titer in each group increased with the increase of immune dose, especially in the group containing LT adjuvant. There were significant differences in the trend of specific IgA titer in feces between the adjuvant groups and the group without adjuvant, but the adjuvant effect was not obvious. (3) No significant difference in serum IgG titer was observed between the mice immunized with 10 μg CdtB by microneedle or intraperitoneal injection, but microneedle immunization significantly increased fecal IgA level. (4) The neutralization titers of specific antibodies in mouse serum after immunization and the test results of challenge protection in mice confirmed that the use of CdtB vaccine had certain protective effects.Conclusions:CdtB vaccine had better immune effects in mice through microneedle immunization, but the adjuvant effects of LT and CTB were not significant.

Objective:To explore the application value of enhanced recovery after surgery (ERAS) in colorectal cancer patients.Methods:From January 2017 to December 2018, 60 patients with colorectal cancer who admitted to the Second People′s Hospital of Lianyungang were selected and divided into ERAS group and control group according to the random digital table method, with 30 patients in each group.The inflammation, nutritional indicators, immune indicators and clinical manifestations before and after surgery in the two groups were compared.Results:At 1 d and 3 d after surgery, the C-reactive protein (CRP) levels in the ERAS group were (70.2±10.3)mg/L, (82.5±8.2)mg/L, respectively, which were lower than those in the control group [(81.5±9.9)mg/L, (110.2±12.9)mg/L] ( t=4.324, 9.911, all P<0.05). On the third day after operation, the levels of albumin and prealbumin in the ERAS group were (31.6±4.8)g/L, (196.8±40.6)g/L, respectively, which were higher than those in the control group [(28.0±5.8)g/L, (172.1±38.8)g/L]( t=2.621, 2.409, all P<0.05). The immune parameters(IgA, IgM, IgG, CD 4+, CD 4+ /CD 8+) in the ERAS group were higher than those in the control group( t=2.132, 2.223, 6.063, 4.253, 2.828, all P<0.05). The number of cases with thirsty and hunger on the day of surgery in the ERAS group was 3 cases and 7 cases, respectively, which were less than 21 cases and 25 cases of the control group(χ 2=22.500, 21.696, all P<0.05). The first exhaust time, defecation time and hospital stay time in the ERAS group were (36.2±12.1)h, (63.4±13.4)h and (9.5±3.2)d, respectively, which were shorter than those in the control group [(54.7±13.8)h, (96.5±18.8)h and (12.1±4.0)d] ( t=5.513, 7.845, 2.761, all P<0.05). The incidence of complications between the two groups had no statistically significant difference ( P>0.05). Conclusion:ERAS can significantly reduce the physical and psychological traumatic stress of patients with colorectal cancer, achieve rapid recovery, improve the treatment effect, shorten the length of hospital stay, reduce social and family burden, and provide a basis for the choice of clinical treatment program.

Objective: To investigate the characteristics of hemolysis, resistance and homology of Staphylococcus cohnii urealyticum. Methods: A retrospective study was carried out on thirteen clinical strains of Staphylococcus cohnii urealyticum. They were re-identified by MALDI-TOF MS. Their colony and hemolytic characteristics on blood agar plates were observed. The co-hemolysis between Staphylococcus cohnii urealyticum and Staphylococcus aureus was demonstrated. The hemolysin genes and drug resistance genes were detected by PCR. Pulsed field gel electrophoresis and mass spectrometry were used to analyze the homology of strains. The susceptibility of strains to antimicrobial agents was detected by agar dilution. Results: The confirmed 13 strains of Staphylococcus cohnii urealyticum showed various levels of hemolysis and had enhanced synergistic hemolysis with Staphylococcus aureus. All strains were susceptible to vancomycin and tigecycline. There were 12 strains which carried mecA gene, 7 strains carried cfr gene, 7 strains carried ermC gene. The 13 strains were divided into 3 groups by MALDI-TOF MS, and 6 types by pulsed field gel electrophoresis. Conclusions Clinical strains of Staphylococcus cohnii urealyticum demonstrated various levels of hemolysis which could be enhanced by Staphylococcus aureus. Although they carried different drug resistance genes, they were all susceptible to vancomycin and tigecycline.

Objective The aim of this study was to investigate the expression of miR-455-5p in epithelial ovarian cancer and its effect on the development of epithelial ovarian cancer. Methods The miRNA expression data of normal ovarian epithelial tis-sues and epithelial ovarian cancer tissues GSE83693 were downloaded from the GEO database. Differential expression analysis was used to obtain differential expression data of miRNAs in epithelial ovarian cancer. The expression of miR-455 -5p was analyzed whether there is difference expression between normal ovarian epithelium and epithelial ovary cancer tissues; qRT-PCR was used to verify the differential expression prediction results; bio-informatics software was used to analyze the KEGG pathway enrichment and GO gene function annotation of miR-455-5p target genes,and to explore the disorders of dyregulated miR-455-5p in the devel-opment of epithelial ovarian cancer. Results A total of 101 cases of differentially expressed miRNAs were screened,34 cases were up-regulated and 67 cases were down-regulated. Among them,miR-455-5p was down-regulated significantly(P<0. 01),and the different fulds were -2. 9019. The results of qRT-PCR showed that the expression of miR-455-5p in epithelial ovarian cancer cells(SKOV-3,OVCAR-3 and A2780)was significantly lower than that in normal ovarian epithelial cells(IOSE-80),and the dif-ferential expression was statistically significant(P<0. 05). The results of KEGG pathway enrichment analysis showed that miR-455-5p regulated target genes mainly involved in five pathways,including TGF-β signaling pathway,Hippo signaling pathway,ECM-receptor interaction,transcriptional dysregulation pathway in cancer,and chronic granule cellular leukemia,which were associated with tumors. GO functional annotation analysis showed that the target genes regulated by miR-455-5p in the above pathway was mainly involved in protein phosphorylation,promoted cell proliferation and migration,inhibited apoptosis,promoted epithelial-mesenchymal transition,regulated transcription and regulated cell cycle,etc. ,which associated with tumorigenesis. Conclusion The expression of miR-455-5p is down-regulated in epithelial ovarian cancer. The miR-455-5p target genes are involved in the pathogenesis and function of epithelial ovarian cancer,and are associated with the development of epithelial ovarian cancer.

Objective: To compare the effects of laparoscope and open complete mesocolic excision (CME) in the treatment of right colon cancer. Methods: The retrospective case-control study was adopted.The clinical data of 139 patients with right colon cancer who underwent CME at the Second People's Hospital of Lianyungang from January 2014 to November 2017 were collected.The patients were divided into laparoscopy group(55 cases) and open group(84 cases). The postoperative recovery and oncology efficacy were compared. Results: The operation time in the laparoscopy group[(172.8±25.9)min]was longer than that in the open group[(142.3±20.6)min](t=7.387, P<0.05), but the blood loss of the laparoscopy group[(111.6±36.7)mL] was less than that in the open group[(150.1±61.1)mL](t=4.017, P<0.05). There was no statistically significant difference in numbers of lymph nodes harvested.Compared with open group, there were advantages in the laparoscopy group such as less anal exhaust time, less postoperative eating liquid diet time and shorter hospitalization time, the differences were statistically significant (t=4.695, 5.517, 4.642, all P<0.05). There was no statistically significant difference in postoperative complication rate (P>0.05). There were no statistically significant differences in the cumulative recurrence rate, cumulative survival rate and cumulative survival rate between the two groups after 3 years (all P>0.05). Conclusion Laparoscopic CME is minimally invasive and quick recovery, and laparoscopic CME has the same oncologic clearance effects, and is worthy of clinical application.

Objective: To explore the application effect of preoperative administration of immunomodulating enteral nutrition for gastric cancer. Methods: From January 2016 to December 2017, 90 cases with gastric cancer in the Second People′s Hospital of Lianyungang were selected and randomly divided into observation group, control group A and control group B, with 30 cases in each group.The observation group was given enteral nutrition emulsion(TPFT, Ruineng) before and after operation, the control group A was given Ruineng before operation and the enteral nutrition emulsion(TP, Ruisu) after operation, the control group B was given Ruisu before operation and Ruineng after operation.The recovery, serum markers of nutritional status and immune function were evaluated and compared, and the postoperative situations were observed. Results: There were no statistically significant differences in the total protein, albumin, prealbumin and transferrin among the three groups during admission, 1 day before operation and 5 days after operation(all P>0.05). There was no statistically significant difference in immune indicators among the three groups during admission and 1 day before operation(all P>0.05). At 5 days after operation, IgA, IgM, IgG, CD₄⁺ and CD4/CD8 in the observation group were (2.9±0.6)g/L, (1.4±0.4)g/L, (12.4±0.9)g/L, (37.4±5.1)%, (2.2±0.7), respectively, which were significantly higher than those in the control group A[(2.3±0.8)g/L, (1.1±0.6)g/L, (10.8±0.8)g/L, (34.2±4.8)%, (1.7±0.8), respectively, t=3.324, 2.250, 7.100, 2.506, 2.660, all P<0.05], the IgA and CD4/CD8 in the observation group were higher than those in the control group B[(2.6±0.8)g/L, (1.9±0.7), t=2.021, 2.127, all P<0.05]. The postoperative exhaust time of the observation group, control group A and control group B were (56.4±7.8)h, (78.6±10.4)h, (60.7±10.6)h, respectively, and the postoperative exhaust time of the observation group was significantly shorter than that of the control group A(t=9.323, P<0.05). There was no statistically significant difference in the gastrointestinal symptoms and postoperative complications among the three groups (P>0.05). Conclusion In perioperative period, immunomodulating enteral nutrition has little effect on the nutritional indicators of patients with gastric cancer and the incidence of postoperative complications, but it can improve the immune function.

OBJECTIVETo analyze the proportion and associated factors of taking subsequent confirmation test among men who have sex with men (MSM) after being tested positive in oral fluid HIV antibody test.

METHODSBy using successive sampling, 1 003 MSM, who were tested positive in oral fluid HIV antibody test in China-Bill & Melinda Gates Foundation AIDS prevention Program (Extension program) in Beijing during May 1 to December 31, 2013, were recruited. The inclusion criteria included: the objects were men who reported having sex with men; the objects aged more than 18 years old; the objects were tested positive in oral fluid HIV antibody test; the objects had not been reported as HIV positives in China Information System for Disease Control and Prevention previously. According to the program strategy, MSM grassroots organizations transferred the respondents to seek subsequent confirmation tests in specific Center for Disease Control and Prevention (CDCs) or hospitals. The subsequent confirmation tests included: fingertip blood HIV antibody rapid test, venous blood Enzyme Linked Immunosorbent Assay (ELISA) HIV antibody test and venous blood Western Blot (WB) HIV antibody test. Chi-square test was adopted to compare the proportion of taking subsequent confirmation tests in different groups. Nonconditional multivaritae binarylogistic regression analysis was taken to identify the associated factors with whether taking subsequent confirmation tests and to calculate the OR (95% CI) values.

RESULTSThe 1 003 respondents were (30.9 ± 9.1) years old. Among all objects, 87.8% (881/1 003) of them took fingertip blood HIV antibody rapid tests and the positive rate was 85.4% (752/881). 98.0% (737/752) of those who were identified as positive in fingertip blood HIV rapid tests took ELISA and WB tests, and the positive rate was 94.4% (696/737). Comparing with those who were expected to seek subsequent confirmation tests in CDCs, the OR (95% CI) value of those who were expected to seek tests in hospitals was 5.10 (1.69-15.36). The OR (95% CI) values of those who used condom sometimes and those who never used condom in anal sex were 5.81 (2.14-15.77) and 3.45 (2.00-5.97) respectively, in comparison with those who reported not having anal sex or using condom consistently in anal sex during the past 6 months. Comparing with the respondents recruited from the internet, the OR (95% CI) values of those recruited in bathrooms, parks/toilets and bars were 0.17 (0.05-0.53), 0.10 (0.04-0.29) and 0.22 (0.06-0.79) respectively. The likelihood of taking subsequent confirmation test decreased with the increase of number of male sexual partners in the past 3 months, and the OR (95% CI) value was 0.92 (0.86-0.99).

CONCLUSIONThe potential HIV positive MSM in the bathroom, park/toilet and bars are less likely to take subsequent confirmation test. Those who do not use condom consistently during anal sex are more likely to seek subsequent confirmation test. Medical organization conducting subsequent confirmation tests is more likely to increase the confirmation test rate of potential HIV positive MSM. The number of male sexual partners has negative correlation with whether to accept the subsequent confirmation test.

Beijing ; Condoms ; HIV Antibodies ; analysis ; HIV Seropositivity ; diagnosis ; Homosexuality, Male ; Humans ; Male ; Mass Screening ; Patient Acceptance of Health Care ; Risk-Taking ; Sexual Behavior ; Sexual Partners ; Surveys and Questionnaires

Objective To evaluate the effects of oral motor interventions on feeding performance of preterm infants with feeding and swallowing disorders. Methods According to the bed number, the premature infants were divided into two groups in equal number: the control group received non-nutritive sucking for 30 minutes before feeding , while the experiment group infants received oral motor interventions. The proficiency and volume transfer were observed and recorded. Result The proficiency and volume transfered in the experiment group were significantly better than those of the control group (P<0.05). Conclusion The oral motor interventions can effectively improve the feeding performance in preterm infants with feeding and swallowing disorders.

OBJECTIVETo investigate the current supply and use of personal protective equipment (PPE) among rural-to-urban migrant workers in small and medium enterprises (SMEs) in Zhongshan and Shenzhen, China and the influential factors for the use of PPE, and to provide a basis for better occupational health services and ensuring the health of migrant workers.

METHODSMulti-stage sampling was used to select 856 migrant workers from 27 SMEs in Zhongshan and Shenzhen, and face-to-face questionnaire survey was conducted in these subjects. Statistical analysis was performed by one-way analysis of variance, chi-square test, and logistic regression.

RESULTSOf all migrant workers, 38.67%were supplied with free PPE by the factory, and this rate varied across industries (furniture industry: 45.81%; electronic industry: 31.46%) and SMEs (medium enterprises: 42.13%; small enterprises: 39.20%; micro enterprises: 22.16%); 22.43% insisted on the use of PPE. The logistic regression analysis showed that factors associated with the use of PPE included sex, age, awareness of occupational health knowledge, and the size of enterprise.

CONCLUSIONThe rates of supply and use of PPE among migrant workers are low. The larger the enterprise, the better the supply of PPE. Male gender, being elder, and high occupational health knowledge score were favorable factors for the use of PPE, while small enterprise size was the unfavorable factor for the use of PPE.

Adult ; China ; Female ; Humans ; Male ; Occupational Health Services ; statistics & numerical data ; Protective Devices ; statistics & numerical data ; Rural Population ; statistics & numerical data ; Transients and Migrants ; statistics & numerical data