Objective To observe whether hepatitis B vaccine enhance the treating effect of cyto-kine induced kill(CIK) cells on hepatitis B virus transgenic(HBV-Tg) mice. Methods The HBV-Tg mice were treated with CIK cells by peritoneal injection and hepatitis B vaccine by hypodermic injection. The HBV DNA level were tested by real-time PCR,T lymphocyte subgroup were detected by flow cytometry and the pathological diversify of hepatic tissue were observed by HE staining. Results The HBV DNA loading in peripheral blood of HBV-Tg mice decreased after CIK cells were treated and CD3~+ , CD4~+ and CD8~+ cells increased which were enhanced after CIK cells combined with hepatitis B vaccine. Conclusion Hepa-titis B vaccine enhanced the treating effect of CIK on HBV-Tg mice which may be implemented by increased the blood level of CD3~+, CD4~+ and CD8~+ cells, especially CD8~+ cells level.

OBJECTIVE To investigate the protective effect of curcumin on Aβ1-42 damaged cells. METHODS SH-SY5Y cells were cultured with Aβ1-4210μmol · L-1 in the absence or presence of curcumin 1, 5 or 10 μmol · L-1. Cell viability was assayed by MTT. Cell membrane damage was detected by the concentration of lactate dehydrogenase (LDH) in culture medium. Cell apoptosis was measured by flow cytometry with Annexin Ⅴ-FITC/PI staining. Mitochondrial membrane potential was characterized by fluorescence of JC-1 dye. Enzymatic activity of caspases-9 and-3 was measured by colorimetric assay. Protein expression of caspase-3 was detected by Western blotting. RESULTS Compared with vehicle control, the cell viability, concentration of LDH and both early and late apoptosis in Aβ1-4210 μmol · L-1 damaged group were decreased(P<0.01). However, the cell viability, release of LDH and both early and late apoptosis in curcumin group were promoted compared with that in Aβ1-4210μmol·L-1 damaged group. Curcumin inhibited Aβ1-42-induced depolarization of mitochondrial membrane potential(P<0.01), and attenuated Aβ1-42-induced activation of both caspases9 and caspases3 in a concentration-dependent manner, respectively(r=0.990, P<0.01; r=0.996, P<0.01). There were no significant differences in the above detected indexes between curcumin 10 μmol · L-1 group and vehicle control group. CONCLUSION Curcumin inhibits Aβ1-42-induced cell damage and apoptosis by promoting mitochondrial membrane potential and depressing the activation of caspases.

Objective To explore the application of nanodisc in functional and drug discovery research of G protein-coupled receptor (GPCR).Methods The purified recombinant 5-Hydroxytryptamine 2B receptor (5-HT2BR) was reconstituted into nanodisc complex.Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and size exclution chromatography were performed to evaluate the reconstitution reaction,followed by the use of surface plasmon resonance to validate the ligand-binding activity of 5-HT2BR after reconstitution.Results 5-HT2B R was effectively self-assembled into nanodisc while maintained its binding activity toward the antagonist SB204741.Conclusions The presented study provided potential application of 5-HT2B R-nanodisc for the development of subtype-selective drugs against 5-HT2B R and the fundamental of utilizing nanodisc for GPCR structural and functional studies as well as drug discovery.

Objective:To explore the effects of father-feeding attitudes on feeding status in preterm infants at discharge, and the role of father support breastfeeding self-efficacy, in order to provide a certain reference and basis for the intervention to improve the breastfeeding rate of premature infants.Methods:This was a cross-sectional study. A total of 402 premature infants' fathers were selected from 3 ClassⅢ Grade A hospitals from Zhejiang Province by convenience sampling method from July to November 2020. The basic data questionnaire, Iowa Infant Feeding Attitude Scale and Father Support Breastfeeding Self-Efficacy Scale-Short Form were used in the investigation. A total of 402 questionnaires were distributed, and 376 valid questionnaires were recovered. The recovery rate of effective questionnaires was 93.5%.Results:The score of father-feeding attitude of the 376 premature infants' fathers was (49.80±9.26) , and the score of support breastfeeding self-efficacy was (43.23±8.52) . Father's self-efficacy of breastfeeding support played a mediating role between feeding attitude and feeding status of premature infants at discharge, and the mediating effect accounted for 33.3% of the total effect.Conclusions:The father's feeding attitude can affect the feeding status of premature infants at discharge by influencing their self-efficacy of supporting breastfeeding. Medical staff should help premature fathers pay attention to breastfeeding, adopt practical and diverse health education methods to help premature fathers gradually master specific support behaviors and enhance their self-efficacy in supporting breastfeeding, and ultimately improve the rate of breastfeeding in premature infants.

Objective To detect 17β-hydroxysteroid dehydrogenase type 1(17β-HSD1)expression in malignant epithelial ovarian tumors and analyze its relationship with pathological features and prognosis.Methods The clinical data of 70 patients with malignant epithelial ovarian tumors,70 with borderline epithelial ovarian tumors,and 70 with benign epithelial ovarian tumors were retrospectively analyzed.Immunohistochemistry was used to detect 17β-HSD1 expression.The difference in 17β-HSD1 expression levels among three groups were compared,and the relationship between 17β-HSD1 expression and various clinicopathological features and prognosis was ana-lyzed.Results Malignant epithelial ovarian tumor tissues had high 17β-HSD1 expression that was closely related to FIGO stage,lymph node metastasis,and carbohydrate antigen 125(CA125)and human epididymis protein 4(HE4)levels(P＜0.05),with no significant cor-relation with menopausal status,tumor differentiation degree,pathological type,and ascites(P＞0.05).The 17β-HSD1 expression levels,preoperative CA125 and HE4 levels,tumor differentiation degree,and FIGO stage affected the prognosis of malignant epithelial ovarian tumors.Multivariate Cox regression analysis suggested that the 17β-HSD1 expression levels and FIGO stage were independent risk factors for malignant epithelial ovarian tumor.Conclusion Malignant epithelial ovarian tumors had high 17β-HSD1 expression,which is closely related to the occurrence and development of tumors and among the independent risk factors affecting the overall survival.

Objective? To establish a WeChat online system supporting continued nursing care for patients receiving enteral bladder augmentation and to evaluate its effects on continued nursing care for patients with neurogenic bladder in spinal cord injury who received enteral bladder augmentation. Methods? Totally 60 patients with low-compliant neurogenic bladder in spinal cord injury who received enteral bladder augmentation and were discharged from Zhejiang Provincial People's Hospital between March 2016 and March 2018 were selected by convenient sampling, and divided into the observation group (n=30) and the control group (n=30) according to the random number table. Patients in the control group received conventional nursing care after discharge, while patients in the observation group received nursing care after discharge via the WeChat online support system. The follow-up duration was 3 months. Bladder self-management compliance, urinary catheter-associated complications, bladder function, quality of life and negative emotions at discharge and 3 months after discharge were compared between the two groups. Results? The score of bladder self-management compliance, anxiety score, depression score, and scores of physical function, role function, emotional function and social function in quality of life in the observation group were better than those in the control group 3 months after discharge (P＜0.05); the rates of urinary tract infection and urethral injury of the observation group were 3.3% and 6.7%, while those of the control group were 26.7% and 33.3%, respectively; the incidence rate of urinary catheter-associated complications of the observation group was lower than that of the control group (P＜0.05); and the parameters of bladder function such as bladder volume, bladder compliance, residual urine volume and maximum detrusor pressure of the observation group were better than those of the control group (P＜ 0.05). Conclusions? The WeChat online support system can improve patients' bladder self-management compliance, reduce the urinary catheter-associated complications, enable the recovery of bladder function, ameliorate their negative emotions, and improve their quality of life.

Objective:To investigate the characteristics of functional limitation and associated factors in patients with rheumatoid arthritis (RA).Methods:Consecutive patients with RA were recruited from August 2015 to June 2019 at Department of Rheumatology, Sun Yat-Sen Memorial Hospital. Demographic and clinical characteristics including age, gender, erythrocyte sedimentation rate (ESR), visual analogue scale (VAS) of pain, clinical disease activity index (CDAI), modified total Sharp score were collected. Physical function was assessed by the Stanford health assessment questionnaire disability index (HAQ-DI).Ordered logistic regression was used to analyze the related factors of HAQ-DI.Results:A total of 643 RA patients were finally recruited including 114 males and 529 females with mean age (49.7±12.9) years. There were 399 (62.1%) patients having different degrees of functional limitation, who were classified as mild (293, 45.6%), moderate (73, 11.4%) and severe (33, 5.1%). The prevalence of functional limitation was positively correlated with age and disease activity. The most restricted activity was walking [43.5% (280/643)], followed by gripping [36.1% (232/643)], reaching [35.5% (228/643)], daily activities [33.4% (215/643)], hygiene [33.0% (212/643)], dressing and grooming [29.7% (191/643)] and arising [29.1% (187/643)], and the last eating [18.4% (118/643)]. Multivariate ordered logistic regression analysis showed that age ( OR=1.019, 95% CI 1.004-1.035),pain VAS ( OR=1.820, 95% CI 1.616-2.050), ESR ( OR=1.009, 95% CI 1.001-1.017), CDAI ( OR=1.080, 95% CI 1.059-1.102) and modified total Sharp score ( OR=1.010, 95% CI 1.004-1.015) were associated factors of functional limitation. Conclusion:The majority RA patients have functional limitation. Age, pain and active disease are independent associated factors. Therefore, target treatment and control of pain should be emphasized in RA patients.

Objective To analyze the distribution and antimicrobial resistance profile of clinical bacterial strains isolated from blood culture in China.Methods Clinical bacterial strains isolated from blood culture from participating hospitals of Blood Bacterial Resistance Investigation Collaborative System (BRICS) during January 2014 to December 2015 were collected.Antibiotic susceptibility tests were conducted with agar dilution or broth dilution methods as recommended by US Clinical and Laboratory Standards Institute(CLSI)2018.The data were analyzed with Whonet 5.6 software.Results During the study period,4 801 clinical bacterial isolates were collected from 26 hospitals,of which 1 798 (37.5％) were Gram-positive bacteria and 3 003 (62.5％) were gram-negative bacteria.The top 10 isolates were Escherichia coli (33.8％),coagulase-negative Staphylococcus (19.0％),Klebsiella pneumoniae (11.9％),Staphylococcus aureus (10.1％),Acinetobacter baumannii (4.0％),Pseudomonas aeruginosa (3.8％),Streptococcus (3.0％),Enterobacter sulcus (2.9％),Enterococcus faecium (2.8％) and Enterococcus faecalis (1.8％).Methicillin-resistant Staphylococcus aureus (MRSA) and methicillinresistant coagulase-negative Staphylococcus (MRCNS) accounted for 33.9％ (165/487) and 56.9％ (520/913) of Staphylococcus aureus and coagulase-negative Staphylococcus respectively.No vancomycinresistant Staphylococcus was detected.The resistance rate of Enterococcus faecium to vancomycin was 0.7％ (1/135),and no vancomycin-resistant Enterococcus faecaliss was detected.The positive rates of extendedspectrum β-1actamases(ESBLs)-producing Escherichia coli,Klebsiella pneumoniae and Proteus were 56.9％ (923/1 621),30.1％ (172/572) and 29.2％ (7/24),respectively.The positive rates of carbapenemresistant Escherichia coli,Klebsiella pneumoniae,Enterobacter,Salmonella and Citrobacter were 1.2％ (20/1 621),7.2％ (41/572),4.3％ (6/141),1.5％ (1/67) and 2.9％ (1/34),respectively.The resistance rates of Acinetobacter baumannii to polymyxin and tegacycline were 2.6％ (5/190) and 8.9％ (17/190)respectively,and that of Pseudomonas aeruginosa to polymyxin and fosfomycin were 1.1％ (2/183)and 0.6％ (1/183),respectively.Conclusions The surveillance results from 2014 to 2015 show that the main pathogens of blood stream infection in China are Gram-negative bacteria,while Escherichia coli is the most common pathogen,the detection rate of MRSA is lower than other surveillance data in the same period in China;carbapenem-resistant Klebsiella pneumoniae and Escherichia coli are at a low level as shown in this surveillance.

Objective:To investigate the distribution and antimicrobial resistance profile of clinical bacteria isolated from blood culture in China.Methods:The clinical bacterial strains isolated from blood culture from member hospitals of Blood Bacterial Resistant Investigation Collaborative System (BRICS) were collected during January 2016 to December 2017. Antibiotic susceptibility tests were conducted by agar dilution or broth dilution methods recommended by US Clinical and Laboratory Standards Institute (CLSI) 2019. WHONET 5.6 was used to analyze data.Results:During the study period, 8 154 bacterial strains were collected from 33 hospitals, of which 2 325 (28.5%) were Gram-positive bacteria and 5 829 (71.5%) were Gram-negative bacteria. The top 10 bacterial species were Escherichia coli (34.7%), Klebsiella pneumoniae (15.8%), Staphylococcus aureus (11.3%), coagulase-negative Staphylococci (7.4%), Acinetobacter baumannii (4.6%), Pseudomonas aeruginosa (3.9%), Enterococcus faecium (3.8%), Streptococci (2.9%), Enterobacter cloacae (2.7%) and Enterococcus faecalis (2.5%). Methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant coagulase-negative Staphylococcus (MRCNS) accounted for 34.2%(315/922) and 77.7%(470/605), respectively. No vancomycin-resistant Staphylococcus was detected. The resistance rate of Enterococcus faecium to vancomycin was 0.6%(2/312), and no vancomycin-resistant Enterococcus faecium was detected. The ESBLs-producing rates in Escherichia coli, Klebsiella pneumoniae and Proteus were 55.7%(1 576/2 831), 29.9%(386/1 289) and 38.5%(15/39), respectively. The incidences of carbapenem-resistance in Escherichia coli, Klebsiella pneumoniae were 1.2%(33/2 831), 17.5%(226/1 289), respectively. The resistance rates of Acinetobacter baumannii to polymyxin and tigecycline were 14.8%(55/372) and 5.9%(22/372) respectively, and those of Pseudomonas aeruginosa to polymyxin and carbapenem were 1.3%(4/315) and 18.7%(59/315), respectively. Conclusion:The surveillance results from 2016 to 2017 showed that the main pathogens of blood stream infection in China were gram-negative bacteria, while Escherichia coli was the most common pathogen; the MRSA incidence was lower than other surveillance data in the same period in China; carbapenem-resistant Escherichia coli was at a low level during this surveillance, while carbapenem-resistant Klebsiella pneumoniae is on the rise.

Objective:To investigate the bacterial composition and antimicrobial resistance profile of clinical isolates from bloodstream infections in China.Methods:The clinical bacterial strains isolated from blood culture were collected during January 2020 to December 2020 in member hospitals of Blood Bacterial Resistant Investigation Collaborative System (BRICS). Antibiotic susceptibility tests were conducted by agar dilution or broth dilution methods recommended by Clinical Laboratory Standards Institute(CLSI, USA). WHONET 5.6 was used to analyze data.Results:During the study period, 10 043 bacterial strains were collected from 54 hospitals, of which 2 664 (26.5%) were Gram-positive bacteria and 7 379 (73.5%) were Gram-negative bacteria. The top 10 bacterial species were Escherichia coli (38.6%), Klebsiella pneumoniae (18.4%), Staphylococcus aureus (9.9%), coagulase-negative Staphylococci (7.5%), Pseudomonas aeruginosa (3.9%), Enterococcus faecium (3.3%), Enterobacter cloacae (2.8%), Enterococcus faecalis (2.6%), Acinetobacter baumannii (2.4%) and Klebsiella spp (1.8%). The prevalence of methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant coagulase-negative Staphylococcus aureus were 27.6% and 74.4%, respectively. No glycopeptide- and daptomycin-resistant Staphylococci were detected. More than 95% of Staphylococcus aureus were sensitive to rifampicin and SMZco. No vancomycin-resistant Enterococci strains were detected. Extended spectrum β-lactamase (ESBL) producing Escherichia coli, Klebsiella pneumoniae and Proteus mirabilis were 48.4%, 23.6% and 36.1%, respectively. The prevalence rates of carbapenem-resistance in Escherichia coli and Klebsiella pneumoniae were 2.3% and 16.1%, respectively; 9.6% of carbapenem-resistant Klebsiella pneumoniae strains were resistant to ceftazidime/avibactam combination. The prevalence rate of carbapenem-resistance in Acinetobacter baumannii was 60.0%, while polymyxin and tigecycline showed good activity against Acinetobacter baumannii. The prevalence rate of carbapenem-resistance of Pseudomonas aeruginosa was 23.2%. Conclusions:The surveillance results in 2020 showed that the main pathogens of bloodstream infection in China were gram-negative bacteria, while Escherichia coli was the most common pathogen, and ESBL-producing strains declined while carbapenem-resistant Klebsiella pneumoniae kept on high level. The proportion and the prevalence of carbapenem-resistant Pseudomonas aeruginosa were on the rise slowly. On the other side, the MRSA incidence got lower in China, while the overall prevalence of vancomycin-resistant Enterococci was low.