Objective To inactivate Death-associated protein kinase 1 gene (DAPK1) by transfecting complementary methylated oligonucleotides and studies its effect on the proliferation of myelogenous leukemia cell line K562. Methods Methylated oligonucleotides complementary to DAPK1 gene promoter were transfected into K562 cells by Iipo2000. Methylation specific PCR (MSP) and Reverse transcription PCR (RT-PCR) were applied to detect DAPK1 gene promoter methylation status and its mRNA expressions respectively. MTT was used to detect the proliferation of K562 cells pre- and post- oligonucleotides transfection. Results DAPK1 gene promoter in non-treated and control groups were unmethylated with detectable mRNA expressions, but it became methylated with inhibited mRNA expressions after methylated oligonucleotide transfection. Proliferation in methylated oligonucleotide treatment group was significantly higher than that in non-treated and control groups. Conclusion Complementary methylated oligonucleotides could inactivate DAPK1 gene and inhibit its expression in K562 cells, which could promote its proliferation.

Objective To analyze the effect of bifrontal decompressive craniectomy on patients with refractory diffusing of brain swelling after severe traumatic brain injury.Methods The clinical data of 68 patients with refractory diffusing of brain swelling after severe traumatic brain injury were analyzed retrospectively.Thirty-five patients were performed with bifrontal decompressive craniectomy as observed group,continued intracranial pressure monitoring after surgery.Thirty-three patients were treated conservatively to reduce intracranial pressure as control group,continued intracranial pressure monitoring.The Glasgow outcome scale after discharge 6 months were assessed.The efficacy,the incidence of complications were observed in observed group.Results The admission intracranial pressure in observed group was significantly higher than that after surgery [(35.9 ±6.9) mmHg (1 mmHg =0.133 kPa) vs.(17.5 ±5.2) mmHg,P ＜0.05].The admission intracranial pressure in control group was (34.2 ± 8.6) mmHg,after admission 10.5 h was (32.0 ±4.8) mmHg (P ＜0.05),difference was no statistically significant (P＞ 0.05).The intracranial pressure after admission 10.5 h in control group was significantly higher than that in observed group after surgery (P ＜0.05).Two cases of subdural effusion,1 case of postoperative hydrocephalus in observed group.The better prognosis rate in observed group was significantly higher than that in control group [45.7％ (16/35) vs.18.2％ (6/33),P ＜ 0.05].Conclusions Bifrontal decompressive craniectomy is a suitable measure to decrease the intracranial pressure in the patients with refractory diffusing of brain swelling.If carried out early,it could provide better outcome for these patients.

Objective To investigate the characteristics of HBsAg and HBcAg in combination pulsed monocyte-derived DCs(MoDC) derived from patients with HBV-associated hepatocellular carcinoma(HCC).Methods MoDCs were generated from 20 HBV-associated HCC patients,and pulsed with recombinant human serum albumin(rHSA)as conDC(control DC),or pulsed with HBsAg andHBcAg in combination as scDC.Phenotypic patterns of MoDCs were characterized by flow cytometry,and the levels of cytokines releasedby MoDCs were analyzed by ELISA,and frequencies of IFN-γ-producing antigen-specific autologous T cells were measured by Elispotassay.HBV-specific CD8 T cells proliferation was determined by pentamer staining.Results 1.The levels of MHC and costimulatorymolecules expressed on scDC were significantly higher than those on immature MoDC(imaDC)in two groups,and the levels of MHC andcostimulatory molecules expressed on imaDC,conDC and scDC in HBsAg+,anti-HBe+,anti-HBc+patients(1-4-5 positive group)were significantly higher than those in HBsAg+,anti-HBc+patients(1-5 positive group);2.The levels of IL-12 and IL-10 produced byscDC were higher than those produced by imaDC and conDC in both groups,and the levels of IL-12 produced by imaDC,conDC and scDCin 1-4-5 positive group were higher than those in 1-5 positive group.3.The frequencies of IFN-γ-producing T cells induced by scDC werehigher than those by conDC in 1-4-5 positive group.4.scDCs from 4 cases of HLA-A2+patients in 1-4-5 positive group could induceautologous T cells to generate HBVcore18-27-specific CD8 T cells.Condusions HBsAg and HBcAg pulse in combination couldsubstantially reverse the impaired function of MoDCs in HBv-associated HCC patients,and boost MoDC to induce HBV-specific T cellsresponse,especially in HBsAg+,anti-HBe+ and anti-HBe+ patients.

Objective To have knowledge of the exact cause of massive osteolysis. Methods Hair of patients from Xinjiang province was collected and 14 trace elements were determined by inductively coupled plasma mass spectrometryICP-MS. Results Trace elements imbalance in the body of patients was disturbed. Chromium and zinc which are benefit to the growth of the bones were only 0.5 ?g/g and 40 ?g/g respectively that were much lower compared with the healthy persons cadmium was much higher than the limit level in healthy person. Moreover the quantity and ratio of potassium and sodium in the patients were obvious abnormal. Conclusion According to the result of the present paper may be the environmental and dietary factors play an important role in pathogenesis of this disease.

Humans ; Occupational Diseases ; prevention & control ; Occupational Health Services ; organization & administration ; Trichloroethylene ; adverse effects

Objective:The significant role of long non-coding RNAs (lncRNAs) in early diagnosis and predicting prognosis has been recognized in various cancers recently.However,the prognostic value of HOXA transcript at the distal tip (HOTTIP),a vital lncRNA in tumorigenesis,remains unclear.In this study,we evaluated its prognostic value by analyzing the correlation of HOTTIP expression with overall survival (OS),lymph node metastasis (LNM) and distant metastasis (DM) in different cancer types by meta-analysis.Methods:We performed a systematic search in PUBMED,MEDLINE,Web of Science and Cochrane Library update to November of 2016.A total of 604 patients from 6 studies were included in final analysis and went through a quantitative meta-analysis by Review manager 5.3.Results:We demonstrated that high expression of HOTTIP had a significant correlation with poor OS (hazard ratio [HR] =2.37,95％ confidence interval [CI] =1.81-3.10,p＜0.001),high LNM rate (odds ratio [OR]=2.29,95％CI=1.54-3.40,p＜0.001) as well as more DM occurrence (OR=3.30,95％CI=1.78-6.12,p＜0.001).Conclusion:Our results indicated that long non-coding RNA HOTTIP may serve as a potential prognostic biomarker in cancer progression.

Objective To study the diagnostic value of serologic intestinal-fatty acid binding protein (i-FABP) in neonatal necrotizing enterocolitis (NEC).Method The standard search strategy included electronic search and manual search.Electronic search was carried out in databases including PubMed,Ovid,Cochrane Library,Chinese Biomedicine Database (CBM),CNKI,WANFANG DATA and VIP database.As a supplement,relevant references from previous reviews and studies were examined by manual search.Two independent reviewers assessed the quality of included studies and extracted data,and performed further meta-analysis.RevManS.3.5 and Meta-Disc1.4 and Stata12.0 were used in the statistical analysis.Result A total of 11 studies with 700 cases were identified,including 308 NEC cases and 392 control cases.The blood samples collected at the time of suspected NEC stage showed pooled sensitivity 0.56 (95％ CI 0.44 ～ 0.67),pooled specificity 0.93 (95 ％ CI0.87 ～ 0.97),area under curve (AUC) =0.8282,and Q* =0.7610,respectively.The blood samples collected after clinical diagnosis of NEC showed pooled sensitivity 0.78 (95％ CI 0.72 ～ 0.83),pooled specificity 0.81 (95％ CI 0.76 ～ 0.86),AUC =0.8680,and Q* =0.7985,respectively.Conclusion i-FABP is a valid serologic biomarker for early diagnosis of NEC in neonatal infants.

OBJECTIVE To discuss a highly effective method to immobilize probe on the surfaces of piezoelectric DNA sensors.METHODS Pseudomonas aeruginosa probe was immobilized on the gold surface of gene sensor(array) with routine self-assembly method(SAM)(non-reduction method) and SAM with deoxidized probe((reduction) method),respectively.The changes in frequency and time-cost were compared in reactions with(different) concentrations of probe.RESULTS Reduction method had the advantage of more probe immobilization;less time consumed in testing and higher changes in frequency during the reaction than non-reduction method.CONCLUSIONS Reduction method has a better ability to immobilize probe on the surfaces of piezoelectric DNA sensors.

OBJECTIVE To establish a SNP detection method by DNA piezoelectric biosensor and detect a SNP relative to HBV infection. METHODS To establish a model experiment with synthesis DNA sequences as target and find the lowest sensitivity. After extraction of genome DNA from inpatient blood sample, the SNP sites located in ESR1 gene region in samples were detected by SNP detecting method established. RESULTS The frequency shift of target-A was 416.0?21.5Hz, the frequency shift of target-G was 9.4?5.0Hz. And it could be detected that the lowest sensitivity of target-A was 2?10-11 mol/L. The three genotypes of blood samples, TT, TC and CC, had different frequency shifts, 109.4?13.4Hz, 52.0?11.4Hz and 7.2?4.5Hz, respectively. CONCLUSIONS SNP in blood sample could be detected specifically and sensitively by DNA piezoelectric biosensor.