Forty-five patients with burn area exceeding 30% TBSA were studied prospectively. Among these 45 patients, 13 developed multiple organ failure (MSOF). Blood superoxide, dismutase (SOD) activity and plasma malondialdehyde (MDA) levels were sequentially determined to assess the role of excessive release of oxygen radicals and lipid peroxidase injury in the mechanism of pathogenesis of postburn MSOF. The results showed that the anti-oxidation capacity of the body was markedly depressed and lipid peroxidase injury markedly increased after a severe burn injury. These changes were not only related to hypovolemic shock after the injury, but also the severity of the burn injury and infection.

This study was aimed to explore the features of clustered regularly interspaced short palindromic repeats (CRISPR) structures in Shigella by using bioinformatics. We used bioinformatics methods, including BLAST, alignment and RNA structure prediction, to analyze the CRISPR structures of Shigella genomes. The results showed that the CRISPRs existed in the four groups of Shigella, and the flanking sequences of upstream CRISPRs could be classified into the same group with those of the downstream. We also found some relatively conserved palindromic motifs in the leader sequences. Repeat sequences had the same group with corresponding flanking sequences, and could be classified into two different types by their RNA secondary structures, which contain "stem" and "ring". Some spacers were found to homologize with part sequences of plasmids or phages. The study indicated that there were correlations between repeat sequences and flanking sequences, and the repeats might act as a kind of recognition mechanism to mediate the interaction between foreign genetic elements and Cas proteins.
Base Sequence ; Clustered Regularly Interspaced Short Palindromic Repeats ; Computational Biology ; Genome, Bacterial ; Plasmids ; Shigella ; genetics

Objective To explore the feasibility of the application of non fasting blood lipid in the hospitalized population.Methods Self-control study was used.608 patients(aged 20~86 years old) were enrolled from April 2015 to October 2016 in lipid center of FuWai hospital.Fasting sample and non-fasting sample(1~4 h after breakfast) were collected from every patient and lipid profile including TG (triglyceride), TC (total cholesterol), HDL-C (high density lipoprotein cholesterol) and LDL-C (low density lipoprotein cholesterol) were measured in clinical laboratory.The results of two tests were compared using the Wilcoxon signed-rank test.Results The differences between non-fasting and fasting lipid test were +0.47 mmol/l (+30%) for TG,-0.03 mmol/l (-2.8%) for HDL-C,-0.09 mmol/l (-3%) for LDL-C and-0.24 mmol/l (-8.7%) for calculated LDL-C (P<0.001 respectively).The differenceswere +0.01 mmol/l for TC and +0.02 mmol/l for non-HDL-C,therefore no statistical difference was observed.When the TG level was stratified,the level of non-fasting LDL-C using directing test method was not significantly different between TG> 4.5 mmol/L and the whole (0.07 vs.0.09),but the level of non-fasting LDL-C using formula method wassignificantly different between TG> 4.5 mmol/L and the whole (0.66 Vs.0.24),andthe drops were 34.9% vs.8.7%.Conclusion Non-fasting lipid test could be an effective routine method for lipid evaluation in the hospitalized population.

Objective: To preliminarily explore the clinical characteristics and gender difference of patients with variant angina (VA) in China. Methods: A total of 312 patients with spontaneous attack of VA admitted in our hospital from 2003-01 to 2009-12 without stimulation test were retrospectively studied. The clinical features were compared between male and female patients to reveal the similarities and differences of VA by genders. Results: The predilection of VA was in male gender (274/312, 87.8%), the common risk factors including smoking, hypertension and hyperlipidemia; 55/312 (17.6%) patients had allergy history. There were 59/312 (18.9%) patients combining arrhythmia while VA attack; coronary angiography (CAG) found that 155/283 (54.8%) patients were with ifxed coronary stenosis and 22/312 (7.1%) combining coronary myocardial bridge. Nitrates, calcium antagonist and stent implantation may effectively control VA attack. Compared with male, female patients had the lower ratio of smokers (10.5% vs 78.8%),P<0.01, higher ratios of family history of coronary artery disease (CAD) (31.6% vs 11.3%),P<0.01, ventricular tachycardia (13.2% vs 3.6%)P<0.05 and ventricular ifbrillation (7.9% vs 1.8%),P<0.05. Conclusion: VA is a cardiac ischemia caused by coronary artery spasm with high incidence for combining arrhythmia, without in time treatment it may incur myocardial infarction even sudden death. VA patients should receive routine CAG and stent implantation according to the severity of stenosis. Female patients were with less smokers while higher ratios in family history of CAD, ventricular tachycardia and ventricular ifbrillation.

Objective:To evaluate the clinical correlation between the CardioChek PA analyzer (CCPA)and a clinical laboratory reference method to use for screening program purposes.Methods:Fasting blood samples were collected on 325 patients (age:23 -86 years).One venous sample was col-lected using a serum tube for the evaluation on a Beckman reference analyzer.A second venous sample was collected in a lithium heparin tube and was evaluated on the CCPA analyzer.Linear regression analy-ses and Bland-Altman method were performed for each measured analyte:total cholesterol (TC),high density lipoprotein-cholesterol (HDL-C),triglycerides (TG)and low density lipoprotein-cholesterol (LDL-C).Results:Our results demonstrated a good clinical agreement for TC,HDL-C,TG and LDL-C (97.0%,92.9%,92.4% and 83.7%)in comparison with the CCPA to the reference analyzer.The correlation coefficients were 0.875,0.81 3,0.91 0,0.864,respectively.P values all <0.001 .There was no significant difference in the detection rate of hyperlipidemia in TC,HDL-C and LDL-C.Conclu-sion:We have identified the pre-analytic phase as an important step to guarantee the quality of results and indicated that the CCPA is a reliable lipid point-of-care testing system that can be used for the appli-cation of clinical screening anywhere.

Objective To investigate the incidence, imaging and clinical characteristics in elderly patients with coronary artery ectasia (CAE). Methods A retrospective analysis was conducted on patients with CAE who underwent coronary angiography between January 2006 and December 2012. According to age, the enrolled patients were divided into two groups (elderly group, age≥ 65 years; non-elderly group, age < 65 years). The clinical feature, imaging characteristics and the 5-year survival rate of the two groups were compared.Results The preva-lence of CAE in elderly patients was 0.33%. Patients in elderly group were found to have significantly higher proportion of female (30.1%vs. 10.1%,P< 0.001), three-vessel disease (60.5%vs. 45.2%,P = 0.003) and localized ectasia (55.0%vs. 40.2%,P = 0.003). In addition, body mass index (20.90 ± 2.71 kg/m2vs. 22.31 ± 2.98 kg/m2,P < 0.001) and percentage of current smokers (45.0%vs. 64.6%,P < 0.001) were significantly lower in elderly group. Cumulative survival curves demonstrated reduced 5-year cumulative survival at the follow-up in the elderly group compared with the non-elderly group (88.0%vs. 96.0%,P = 0.002). But the 5-year event free survival rate failed to show a significant difference between the two groups (31.0%vs. 35.0%,P= 0.311).ConclusionThe prevalence of CAE in elderly patients was 0.33%, which was about 1/3 of the entire numbers of CAE patients. There were significant differences between the elderly and the non-elderly patients with CAE in terms of coronary artery disease risk factors and coronary artery ectatic characteristics. CAE might be asso-ciated with increased mortality risk in the elderly.

Objective: To explore the safety and efficacy of lipoprotein apheresis (LA) in treating the patients with familial hypercholesterolemia (FH).
Methods: A total of 12 FH patients treated in our hospital from 2015-02 to 2016-10 were retrospectively studied. Based on intensive cholesterol lowering therapy with rosuvastatin (10-20) mg Qd and Ezetimibe 10 mg Qd, the patients received LA by double ifltration plasma pheresis (DFPP) via bilateral elbow central vein or femoral vein. The changes of lipid level were compared at before and after LA treatment.
Results: For pre- and immediately after LA treatment, the average total cholesterol (TC) was (9.42±3.65) mmol/L vs (2.84±0.83) mmol/L, low density lipoprotein cholesterol (LDL-C) was (7.31±3.46) mmol/L vs (1.95±0.82) mmol/L; at 1, 3, 7 and 30 days after treatment, TC and LDL-C levels showed increasing trend, while they were still lower than they were before treatment, allP<0.01. For pre- and immediately, 1 day, 3 days after treatment, the average HDL-C level was (0.96±0.31) mmol/L, (0.63±0.17) mmol/L, (0.56±0.15) mmol/L and (0.68±0.22) mmol/L respectively,P<0.05-0.01. For pre- and immediately after LA treatment, the average TG level was (1.90±0.86) mmol/L vs (0.88±0.38) mmol/L,P<0.05. Only 1 patient had the symptoms of hypotension, nausea and sweat, the patient was relieved by expectant treatment.
Conclusion: LA therapy may decrease blood levels of TC and LDL-C at short term in FH patients with good tolerance;even TC and LDL-C could slowly increase after treatment, while combining with lipid lowering therapy, it has been a safe and effective method for treating relevant patients.

The generation of large quantities of novel human T cell clones ex vivo would make a wide range of gene-and immuno-therapies for tumor and AIDS possibly. Although it is well established that T cells are derived from CD34(+) cells, the involvement of thymic fragments from either human or murine fetus makes the in vitro T cell perliferation very cumbersome. In this report, cord blood mononuclear cells were used as accessory cells to support the differentiation of CD34(+) cells into naive T cells stimulated with SCF and IL-2. CD4(+) and CD8(+) T cells, under the cultural conditions, were continuously produced in vitro at least over a period of 3 weeks and their ratios changed gradually. CD4/CD8 double positive T cells and RAG-2 gene were existed, and RAG-2 gene, reponsible for TCR rearrangement, was expressed during the cell proliferation. Our study presents a simple culture system in vitro to acquire large quantities of naive T cell clones.

Transfer of drug resistance genes into hematopoietic cells is an attractive approach to protect hematopoietic system from the toxic effects by chemotherapeutic agents in cancer patients. In this study, transduction of mdr-1 in combination with dihydrofolate reductase (dhfr) gene was performed, and the expression of exogenous genes and chemoprotection capacity in mouse bone marrow cells were observed. The results showed that approximately 15% of bone marrow cells transfected with the retroviral vector expressed mdr-1 as assayed by flow cytometry. Gene transfer resulted in about 0.9 - 13 fold and 0.5 - 2.6 fold increase in the resistance of CFU-GM to taxol and methotrexate in vitro, respectively (P < 0.05). Moreover, seven months after transplantation to syngeneic mice with mdr-1 and dhfr-transfected bone marrow cells, peripheral blood cells in recipients were still positive for gp170 as evaluated by FACS as well as for mdr-1 and dhfr by PCR amplification. These results indicate that hematopoietic progenitors can be transfected by retrovirus containing mdr-1 and dhfr genes, and that functional drug resistance accompanies their expressions. Furthermore, genetic chimerism might exist in hematopoietic stem cells. In conclusion, transfer and expression of mdr-1 and dhfr genes in bone marrow cells might be applicable in gene therapy research in cancer patients.