Objective To screen differentially expressed genes in placentas with hepatitis B virus (HBV)infection and to discuss the molecular mechanism of HBV intrauterine infection.Methods Thirty placenta tissue specimens from HBsAg and HBV DNA positive pregnant women were used as the study group and 30 placenta tissue specimens from normal pregnant women with HBsAg and HBV DNA negativity were served as the control group.The suppression subtractive hybridization(SSH)technique was used.Total RNAs of placenta tissue of the study group were mixed as the tester,and total RNAs of placenta tissue of the control group were mixed as the driver.A subtractive cDNA library was constructed by PCR-selective cDNA subtraction systems.Amplifications of the library were carried out with E.coil strain DH5? by reverse spot hybridization.RT-PCR confirmed that phosphatidylinositol 3-kinase(PI3K)was up-regulated in placenta tissue with HBV infection.Results Colony PCR showed that the clones contained 200-1000 bp inserts. Thirty five clones were confirmed by reverse spot hybridization and analyzed by sequencing and bioinformatics.Thirty three known genes and 2 genes with unknown function were obtained.RT-PCR preliminarily confirmed that PI3K gene was up-regulated in HBV infected placenta.Conclusions The differentially expressed genes in placentas with hepatitis B virus(HBV)infection using SSH technique has been screened out successfully.These differentially expressed genes encoding proteins participating in cell vital metabolism and malformation,and signal conduction-antiapoptosis pathway.This finding brings some new clues for studying the mechanisms of HBV intrauterine infection.

OBJECTIVE: To investigate the methods for verifying and comparing performance of HIV testing methods and procedure analysis in blood station laboratories so as to meet the requirements of ISO15189 accreditation. METHODS: The performance of HIV test was verified by the automatic ELISA analyzer, the intra- and inter-assay precision was analyzed and evaluated by intra- and inter-assay repeat tests, the compliance rate was verified by the test results of the standard serum plate and the external quality assessment from the Ministry of Health in the past 2 years, the limit of detection was verified through continuous dilution of a known amount of reference serum for internal quality control, the status of the instrument was evaluated by testing one HIV-negative specimen, one HIV-negative with other positive markers, one strong HIV-positive specimen and two weak HIV-positive specimens. RESULTS: The intra- and inter-assay precisions were 5.12% and 16.81% respectively, the compliance rate of the serum plate test was 100%, the compliance of the external quality assessment results was 100%, the limits of detection for HIV was 1.42 NCU/ml, and the consistency of the detection systems was 100%. CONCLUSION The analytical performance of the HIV test methods and procedures accords with the requirements of the reagent instructions, the comparison of the test systems meets the verification requirements.
Enzyme-Linked Immunosorbent Assay ; HIV ; Mass Screening ; Quality Control ; Serologic Tests

DNA mismatch repair gene mutS (2.56 kb) was PCR modified and cloned into a secretive prokaryotic expression vector pET32a (+) which carries a N-terminal His.tag + and thioredoxin sequence. MutS protein was expressed with high level after IPTG induction using the strain E. coli AD494(DE3). SDS-PAGE revealed that the expected protein with a molecular weight of 108 kD which is about 35% of the total bacterial proteins is almost soluble. The expected protein was purified directly by immobilized metal (Ni2+) chelation affinity chromatography and the purity is over 90%. MutS protein activity verified using mismatch DNA showed that the expression product can recognize and bind to base-pair mismatch specifically.
Adenosine Triphosphatases ; biosynthesis ; genetics ; isolation & purification ; Bacterial Proteins ; Base Pair Mismatch ; Chromatography, Affinity ; DNA ; metabolism ; DNA Repair ; DNA-Binding Proteins ; Escherichia coli Proteins ; biosynthesis ; genetics ; isolation & purification ; Magnesium ; pharmacology ; Molecular Weight ; MutS DNA Mismatch-Binding Protein ; Recombinant Proteins ; biosynthesis

OBJECTIVETo investigate the effects of treadmill exercise on central hemodynamics in patients with coronary artery disease.

METHODSSixty-eight consecutive patients below 60 years of age with the diagnosis of coronary artery disease (CAD) between July, 2013 and April, 2014 underwent treadmill exercise test following the standard Bruce protocol. Ninety-seven individuals without CAD served as the control group. Central hemodynamics of the subjects, including the central aortic blood pressure (cSBP), augmentation index (AI) and augmentation pressure (AP), were examined before and after the exercise.

RESULTScSBP increased significantly after acute exercise in both groups (P<0.001). Immediately after treadmill exercise, AI showed no significant changes in CAD patients (P=0.561) but decreased significantly in the control subjects (P<0.001). AI before exercise and cSBP after exercise were significantly higher in CAD group than in the control group (P=0.009 and 0.009, respectively). Stepwise regression analysis showed that the maximal heart rate after exercise was the main factor that affected cSBP increment in CAD group (P=0.012), and the occurrence of ischemia after exercise was associated with a lower cSBP increment (P=0.048).

CONCLUSIONAI does not decrease significantly after acute exercise in patients with CAD, suggesting that AI is closely associated with coronary artery blood perfusion after exercise and may serve as a potential target for improving ischemic threshold during rehabilitation of the patients.

Blood Pressure ; Case-Control Studies ; Coronary Artery Disease ; physiopathology ; Exercise Test ; Heart Rate ; Hemodynamics ; Humans ; Middle Aged

OBJECTIVETo investigate the coping strategies of the community-based population in Shenzhen.

METHODSTotally 5,940 subjects from the communities in Shenzhen were sampled and tested with the Simplified Coping Style questionnaire.

RESULTSThe most common coping strategies adopted by the community residents in Shenzhen were "consoling themselves" (33.1%) and "looking at the bright side of things" (31.4%), and the least adopted coping strategy was "relieving distress by smoking, drinking, taking medicine and eating" (57.8%); the strategies left out from their choices were mostly negative strategies. The scores for positive coping strategy factors of community residents in Shenzhen were greater than those of negative ones, with a mean difference of 0.43. The scores of both positive and negative coping strategy factors of these residents were significantly lower than those of general population in other mainland cities (P<0.001), with mean differences of 0.12 and 0.36, respectively.

CONCLUSIONThe community residents in Shenzhen adopt mostly positive strategies for coping with frustration, which benefit their status of self-rated health.

Adaptation, Psychological ; Adolescent ; Adult ; Aged ; China ; Emotions ; Female ; Humans ; Male ; Middle Aged ; Residence Characteristics ; Self Care ; methods ; psychology ; Social Support ; Stress, Psychological ; psychology ; Surveys and Questionnaires

OBJECTIVETo explore the expression of the family with sequence similarity 135 member B (FAM135B) and K(lysine) acetyltransferase 5 (KAT5) in esophageal squamous cell carcinoma (ESCC) in Uygur patients.

METHODSThe expression of FAM135B and KAT5 in ESCC tissues and paired adjacent tissues from 40 Uygur patients were detected using Roche Benchmark XT. The correlation of FAM135B and KAT5 and their correlation with the clinicopathological characteristics of the patients were analyzed.

RESULTSThe positivity rates of FAM135B and KAT5 in ESCC tissues were 92.50% (37/40) and 15.00%(6/40) in these patients, respectively. The ESCC tissues showed a significantly higher rate of strong FAM135B expression than the adjacent tissues [45.00% (18/40) vs 22.50% (9/40); Χ=4.528, P=0.033], but the rates of negative KAT5 expression was similar between ESCC and adjacent tissues [85.00% (34/40) vs 87.50% (35/40); Χ=0.105, P=0.745]. Strong expressions of FAM135B in ESCC tissues and the paired adjacent tissues were well correlated (Kendall's coefficient = 0.707, P<0.001). In ESCC tissues, a strong expression of FAM135B showed a significant negative correlation with KAT5 expression (Kendall's coefficient=-0.946, P<0.001). Neither FAM135B nor KAT5 expression was associated with the patients' gender, age, tumor site, tumor differentiation, invasion, lymph node metastasis and clinical stage (all P>0.05).

CONCLUSIONA strong expression of FAM135B may be an important molecular basis for the occurrence of ESCC in Uygur patients and plays its role by negatively regulating the expression of KAT5.

Adult ; Aneurysm, Dissecting ; therapy ; Angioplasty, Balloon ; methods ; Female ; Humans ; Male ; Mesenteric Artery, Superior ; surgery ; Mesenteric Vascular Occlusion ; therapy ; Middle Aged ; Treatment Outcome

Objective To test the reliability and validity of Chinese version of Illness Cognition Questionnaire(ICQ)in women with breast cancer. Methods From October,2016 to May,2017,297 women with breast cancer were investigated with the Chinese version of the ICQ and Brief Illness Perception Questionnaire(B-IPQ).The reliability and validity of the Chinese version of ICQ were tested. Results The Cronbach's α of three subscales of ICQ(helplessness,acceptance and perceive benefits)were 0.855,0.857, 0.878,and the test-retest reliability of three subscales were 0.946,0.963,0.901(P<0.001).A confirmatory factor analysis was tested,χ2/df=2.500,SRMR=0.063,CFI=0.920.The factor load capacity of each subscales was 0.37 to 0.84 and the correlation of helplessness,acceptance and perceive benefits was-0.49 to 0.81(P<0.001).The correlation coefficient of criterion-related validity of the helplessness subscale of ICP with B-IPQ was 0.727(P<0.001). Conclusion The Chinese version of ICQ has good reliability and validity,which is a valuable research tool in clinical studies of psychological cognition of patients with breast cancer.

OBJECTIVETo evaluate the quality of life (QOL) in patients with esophageal carcinoma after thoracoscopic and laparoscopic esophagectomy and circular stapled cervical esophagogastric anastomosis via retrosternal route or three-incision open surgery.

METHODSA total of 63 patients with middle-upper esophageal carcinoma who underwent radical surgical resection from January 2009 to October 2010 were enrolled in this study. Thirty-three patients underwent combined laparoscopic and thoracoscopic surgery and 30 three-incision open surgery. The EORTC questionnaire QLQ-C30 and QLQ-OES18 were used to evaluate the QOL.

RESULTSThere were no significant differences in the clinical data between the two groups except for anastomosis method(P>0.05). In the endoscopy group, there was one patient developed anastomotic leakage(3.0%, 1/33), 1 postoperative wound infection in the neck (3.0%, 1/33), and 1 anastomotic stricture(3.0%, 1/33). In the open group, 8 patients had anastomotic leakage (26.7%, 8/30), 2 had anastomotic stricture (6.7%, 2/30), 1 had wound infection in the neck (3.3%, 1/30), and 6 had pulmonary infection (20.0%, 6/30). All the complications were managed by conservative treatment. The two groups differed in dysphagia, food intake, pain, obstruction, dyspnea, anorexia, fatigue, financial condition, physical function, role function, emotional function, cognitive function, social function and global health level and were more favorable in the endoscopy group(P<0.05), while there were no significant differences in the other dimensions.

CONCLUSIONSThe postoperative complication rate is low after thoracoscopic and laparoscopic esophagectomy. Stapled anastomosis is associated with lower rate of anastomotic leak. QOL is better in patients following thoracoscopic and laparoscopic esophagectomy as compared to those following three-incision open surgery.

Aged ; Anastomosis, Surgical ; methods ; Esophageal Neoplasms ; surgery ; Esophagectomy ; methods ; Esophagus ; surgery ; Female ; Follow-Up Studies ; Humans ; Laparoscopy ; Male ; Middle Aged ; Quality of Life ; Stomach ; surgery ; Thoracoscopy

OBJECTIVETo investigate the effect of postischemic treatment with endomorphin-1 (EM-1) against myocardial ischemia/reperfusion (IR) injury in rats and on extracellular signal regulated kinase 1/2 (Erk1/2)-dependent signaling pathway.

METHODSSprague-Dawley rats were randomly divided into 5 groups, namely the sham-operated group, IR group, EM-1 post-treatment group (EM50 group), EM-1 post-treatment group with PD98059 treatment (EM50+PD group), and PD98059 post-treatment group (PD group). The hemodynamic indexes of the rats were recorded. After reperfusion, CK-MB, LDH, CTnI, MDA, IL-6, TNF-α, and SOD activities or contents were measured, the infarct size was determined, and the expression levels of Erk1/2, P-Erk1/2 and cleaved caspase-3 were detected using Western blotting.

RESULTSCompared with the sham group, the IR group showed significantly decreased heart rate and mean arterial pressure (P<0.05), which were increased obviously by EM-1 post-treatment (P<0.05). EM-1 post-treatment also resulted in significantly decreased LDH, CK-MB, CTnI, MDA, IL-6, and TNF-α activities or contents (P<0.05), increased SOD activity (P<0.05), reduced the infarct size (P<0.05), and increased the expression level of P-Erk protein (P<0.05). Compared with EM50 group, EM50+PD group showed significantly decreased heart rate and mean arterial pressure (P<0.05), increased LDH, CK-MB, CTnI, MDA, IL-6, and TNF-α activities or contents (P<0.05), decreased SOD activity, increased infarct size (P<0.05), and lowered expression of P-Erk protein (P<0.05).

CONCLUSIONPostischemic treatment with EM-1 protects the heart against IR injury by improving the cardiac function, inhibiting inflammation, and inhibiting oxidative stress and myocardial apoptosis, and Erk1/2 signaling pathway may be involved in this process.