Objective To investigate mother-to-child transmission of HIV-1 and the factors that affect transmission. Methods 136 children who were born to HIV positive mothers in a high HIV prevalence region were interviewed and blood samples were examined for anti-HIV anti-HGV and HIV RNA or HIV DNA. Results Among 136 children who were born to HIV positive mothers, 50 were infected with HIV. The MTCT rate was 36.8% (50/136). Thirty eight DNA fragments of HIV-1 gag gene P17 obtained from HIV-1 seropositive mothers were amplified by PCR from uncultured peripheral blood mononuclear cells (PBMCs). Sequence analyses showed that all of them were HIV-1 B subtype. The HIV vertical transmission rate among mothers with AIDS (67.4%, 31/46) was significantly greater than among those with HIV alone (21.1%, 19/90), P

Objectives:To compare the susceptibility of serum lipoproteins to oxidation and the effects of high-density lipoprotein on oxidative stress in patients with lipid turbulence.　Methods:VLDL, LDL and HDL were isolated using sequential ultracentrifugation from serum of patients with chronic renal failure (CRF) (n=45), myocardial infarction survivor (MIS) (n=33) , cerebral infarction(CI)(n=33) ,type 2 diabetes mellitus(DM)(n=53) and normal individuals (n=44). The degree of lipid peroxidation was estimated using the thiobarbituric acid-reactive substances (TBARS) value and the susceptibilities of lipoproteins to oxidation were assessed by measuring the increased absorbance value at 234 nm due to the conjugated dinene formation. Lipid levels and lipoprotein fractions were measured using standard methods.　Results: VLDL obtained from the patient groups showed significant increase in TBARS values, especially from the patients with MIS (compared with control group, P<0.001). In addition, LDL from MIS and DM groups and HDL from CI and DM groups also showed markedly increase in TBARS content. Significant decrease in lag time was observed in both VLDL and LDL fractions from the four patient groups. However, no change was found in the lag time in HDL fraction from the patient group compared with control group. In addition, HDL from the four patients exhibited significantly decreased inhibitory effects on in vitro oxidation of LDL, with the most significant decrease in HDL from CRF and MIS groups.　 Conclusions:The oxidative modification of lipoproteins in vivo in patients with serum lipid turbulence might be involved in the development of atherosclerosis in these patients.

Associations between "lipid-related" candidate genes, blood lipid concentrations and coronary artery disease (CHD) risk are not clear. We aimed to investigate the effect of three newly identified lipids loci from genome-wide association studies on CHD and blood lipid levels in Chinese Han population. The genotypes of SNPs at three newly identified lipid loci and blood lipids concentrations were examined in 1360 CHD patients and 1360 age- and sex-frequency matched controls from an unrelated Chinese Han population. Allele T of rs16996148 occurred less frequently in CHD patients with the odds ratio (OR) being 0.64 (95% CI 0.50 to 0.81), after adjusting for conventional risk factors and was associated with a 33% decreased CHD risk (P<0.01) comparing with the major allele G. Individuals with GT genotype had the lowest CHD risk. No associations were found between the polymorphisms of other two loci with CHD risk and all three SNPs had no effect on lipid profile in this population. SNP rs16996148 on chromosome 19p13 is significantly associated with lower risk for CHD in Chinese Han population. However, it remains unresolved why these lipid-related loci had significantly less effects than the correspondingly expected effects on blood lipids levels in this population.

Objective To study the status of anxiety and depression on clinical decision-making participation of laryngeal cancer patients.Methods A total of 82 laryngeal cancer patients participated in the investigation by questionnaire to study the clinical decision-making participation by control preferences scale.The degree of anxiety and depression was investigated by self-rating anxiety scale and self-rating depression scale.Results During the clinical decision-making process,40.24％ of the patients were passive,29.27％ had their families as absolute representatives,20.73％ took part collaborating with their families and only 9.76％ were active.47.56％ had anxiety and 64.63％ depression,and the anxiety and depression influenced their participation in clinical decision-making postively and passively relatively.Conclusions Patients with laryngeal cancer are passive in clinical decision-making and most of them have anxiety and depression.Doctors should enhance the communication with patients,which can help to eliminate adverse psychological emotions and make satisfying clinical decision-making.

Child, Preschool ; Combined Modality Therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Gastrointestinal Diseases ; drug therapy ; Humans ; Infant ; Male ; Phytotherapy ; Plant Extracts ; therapeutic use

DNA Damage ; DNA Glycosylases ; genetics ; metabolism ; DNA Repair Enzymes ; genetics ; metabolism ; Humans ; Phosphoric Monoester Hydrolases ; genetics ; metabolism

Neural stem cells in brains have capacities of proliferation and differentiation, which is very critical to rebuild the cerebral cortex functions. Therefore, it is of great importance to find key targets and network pathways that regulate the proliferation of neural stem cells, which is also a pressing problem in the medical circle. With the Notch pathway as the core of the network, this paper summarized the advance of the bimolecular network system composed of Wnt, Shh, EGFR, cytokines and Notch signal, and analyzed such key nodes as Notch receptor, CBF1, NICD, Hesl, which may become potential targets of new-type drugs in the future. With the multi-component, multi-target, multi-lever characteristics, traditional Chinese medicines have many common grounds with the network pharmacology. The active component groups or active ingredients in traditional Chinese medicines are one of the material bases for showing their network pharmacological effect, which is worth exploring. This paper aims to provide a new strategy for the treatment of neurodegenerative disease and nerve injury with traditional Chinese medicines.
Animals ; Cell Proliferation ; Humans ; Neural Stem Cells ; cytology ; metabolism ; Signal Transduction ; Systems Biology

Objective To systematically evaluate the effect of routine insertion of double-J stents to prevent major urological complications(MUCs)in kidney transplant recipients.Methods Medline,Embase,Cochrane Library,and Chinese Biomedicine database were searched to locate relevant randomized controlled trials(RCT).Data extraction and assessment of methodologic quality were performed independently by two reviewers.Meta-analysis was performed by Revman 5.0 software.Results Ten RCT(including 1616 patients)were identified.By comparing the routine stent group with the no stent group,the meta-analysis showed:(1)incidence of urine leak,urinary obstruction and UTI was 4 times lower,6 times lower,increased by 52 % respectively(P＜0.0001);(2)Patient and graft survival,rate of acute rejection,delayed graft function and hematuria were of no significant difference.In subgroup analysis,it was found:(1)Compared with the no stent group,the group in which stent duration was≤ 4 weeks had a lower incidence of MUCs and a higher incidence of UTI;meanwhile,the group in which stent duration was ＞ 4 weeks had a much lower incidence of MUCs and the rate of UTI was increased without significant difference;(2)In the RCT of which urethral catheter duration was ＜ 5 days,there were no significant differences between the two groups in MUCs and UTI.In the RCT of which urethral catheter duration was ≥5 days,the stent group had a lower incidence of MUCs and a higher incidence of UTI.Conclusion Routine stenting reduces the incidence of MUCs.Although the double-J stent increases the risk of UTI,it seems that UTI doesn't affect the outcome of transplantation.The stent duration should be within 4 weeks.For the stent recipients,the longer duration of urethral catheter,the lower incidence of MUCs,the higher incidence of UTI;thus,it is up to clinicians to decide the optimal duration of urethral catheter.Long term prescription of 480 mg cotrimoxazole once daily,from the operation day till after stent removal,effectively reduces the risk of UTI associated with stent placement.

Objective This study was performed to assess the clinical feasibility of video-assisted mediastinoscopic lymphadenectomy in the treatment of resectable lung cancer.Methods Between March 2011 and May 2012,we retrospectively analyzed the data from 56 patients who underwent video-assisted mediastinoscopic lymphadenectomy(VAMLA).In patients receiving tumour resection subsequently,radicality of the previous mediastinoscopic dissection was controlled during thoracotomy.Results Mean operative time of video-assisted mediastinoscopic lymphadenectomy was(42.0 ± 13.5) min(range of 26-86 min).Mean number of resected lymph nodes was 12.4 ± 6.7 (range of 5-24).In video-assisted mediastinoscopic lymphadenectomy,the rates of lymph node dissection of stations 2,4,5,7,8 were 54.5％,92.7％,58.2％,100％,61.8％,respectively,there was no operative mortality and morbility.90.9％ patients achieved radical dissection.Conclusion Video-assisted mediastinoscopic lymphadenectomy is a clinically feasible procedure and provides more accurate staging of mediastinal node in lung cancer patients.It also plays an important role in minimal invasive surgery and neoadjuvant therapy.

Immobilized penicillin acylase was used for bioconversion of penicillin G into 6-APA in aqueous two-phase systems consisted of a light-sensitive polymer PNBC and a pH-sensitive polymer PADB.Partition coefficients of 6-APA was found to be:about 5.78,in the presence of 1% NaCl.Enzyme kinetic showed that reaction reached equilibrium at 7h or so.The 6-APA mole yields were 85.3%(pH 7.8,and 20 ℃) and this value was about 20%higher than control in reaction of single aqueous phase buffer.Partition coefficient of penicillin G(Na) washardly changeable,while partition coefficient of product,6-APA and phenylacetate acid was significantly changeable.Reason is due to Donnan effect of phase systems andhydrophobicity of products.The change of partition coefficients of products also affects bioconversion yield of products.In the aqueous two-phase systems,substrate,penicillin G,products 6-APA and phenylacetate acid are biased in top phase,while immobilized penicillin acylase is completely partitioned in bottom.Substrate,penicillin G enters into bottom phase,and it is catalyzed into 6-APA and phenylacetate acid,then the products enter into top phase.Finally,inhibition of substrate and products is removed to result in improvement of products yield.Moreover,immobilized enzymehashigher efficiency than immobilized cells and occupy smaller volume.Comparing with free enzyme,immobilized enzymehashigher stability,longer use life,completely partitioned in bottom phase and recycle.Bioconversion in two-phase systems using immobilized penicillin acylase showed outstanding advantage.The light-sensitive copolymer forming aqueous two-phase systems could be recovered by laser radiation at 488 nm or filtrated 450 nm light,while pH-sensitive polymer PADB could be recovered by isoelectric point(pH 4.1).The recovery of the two copolymers was 95%~99%.