Objective To investigate the relationship betweenthe stability of carotid artery plaque and cystatin C,homocysteine. Methods A total of 1 50 cerebral infarction patients with carotid artery plaque treated in Hospital of the First Electricity Authority in Guangdong were selected as the research subjects.According to Color Doppler ultrasound scanning,the patients were divided into the observation group (86 unstable plaque patients)and control group(64 stable plaque patients).Peripheral venous blood from the patients of both groups were collected for the detection of cystatin C,homocysteine,serum total cholesterol and fibrinogen levels and the results of detection were compared between the two groups.Results The levels of cystatin C,homocysteine,serum total choles-terol and fibrinogen in the observation group were significant higher than those of the control group(t =48.760,20.530,29.860, 33.720,P <0.05).The level of cystatin C was weak positive correlated with homocysteine(r =0.21,P <0.003).Multivariate lo-gistic regression analysis showed cystatin C,homocysteine,serum total cholesterol and fibrinogen were independent risk factors for carotid artery plaque instability in patients with cerebral infarction.Conclusion Cystatin C,homocysteine,serum total cholesterol and fibrinogen are important risk factors for carotid plaque instability,the cerebral infarction is closely related to the carotid artery plaque stability,so controlling the risk factors is the focus of prevention and treatment of cerebral infarction.

OBJECTIVETo evaluate the application of small intestine double stoma and succus entericus reinfusion in the patients with severe intra-abdominal infection.

METHODSTen patients with high intestinal perforation from February 2005 to November 2014 were enrolled in the study. All the cases received emergency operation. Small bowel with intestinal perforation was resected, and double stoma was applied in the proximal and distal small intestine. When abdominal infection under control, total enteral nutrition was successfully administered from nasogastric tube. The succus entericus from the proximal intestine was collected and transfused back to the distal intestine. Stool was collected and fecal nitrogen, fat and carbohydrate contents were determined. Related serum protein levels were measured.

RESULTSAs compared to pre-reinfusion, the absorption rate of carbohydrate [(90.9±7.8)% vs. (82.7±15.2)%], fat [(87.6±6.4)% vs. (59.1±10.8)%], and nitrogen [(82.4±9.8)% vs. (67.2±15.4)%] increased after succus entericus reinfusion (P<0.05). The serum protein levels increased significantly as well[fibronectin: (285.6±3.6) vs. (157.0±22.6) mg/L, P<0.01; transferrin: (4.86±0.21) vs. (3.60±0.25) g/L, P<0.05; pre-albumin: (291.3±112.5) vs. (199.1±53.3) mg/L, P<0.05].

CONCLUSIONSmall intestine double stoma and succus entericus reinfusion are effective in improving the absorption of carbohydrate, fat and nitrogen in the patients with severe intra-abdominal infection.

Enteral Nutrition ; Humans ; Intestinal Perforation ; Intestinal Secretions ; Intestine, Small ; Intraabdominal Infections ; Surgical Stomas

Bacterial ghost is intact envelope of Gram-negative bacteria, which is produced by the function of the lysis gene E from bacteriophage PhiX174. The expression of the lysis gene E is usually controlled by the thermosensitive lambdapL/pR-cI857 promoter. In this study, we described a mutation (T --> C) at the ninth nucleotide of the OR2 in the lambdapR promoter of the lambdapL/pR-cI857 system by overlap PCR. The bacteriolytic assay showed that the mutation in the lambdapL/pR-cI857 system enhanced the temperature of repressing the expression of gene E up to 37 degrees C. The lysis efficiency of altered lambdapR promoter in Escherichia coli DH5a and avian pathogenic E. coli DE17 was up to 99.9%. The expanded range of temperature will benefit for the production of bacterial ghost.
Bacteriolysis ; physiology ; Bacteriophage lambda ; genetics ; Base Sequence ; Cell Membrane ; physiology ; DNA, Bacterial ; analysis ; Escherichia coli ; genetics ; growth & development ; physiology ; virology ; Gene Expression Regulation ; genetics ; Molecular Sequence Data ; Mutation ; Promoter Regions, Genetic ; genetics ; Viral Proteins ; genetics ; metabolism

Objective:To screen genetic and epigenetic expression differences associated with pulmonary embolism through integrated bioinformatics analysis.Methods:Four patients with pulmonary embolism and healthy physical examination in the Third Affiliated Hospital of Xinjiang Medical University in 2019 were selected as the research objects, using high-throughput sequencing technologies and methylation chip technology to detect, screening and integrated peripheral blood difference genomes and the epigenome data to identify the pathogenesis of pulmonary embolism caused by methylation of drive and differentially expressed genes, GO and KEGG enrichment analysis were performed.Results:Coexpression analysis of DNA methylation and gene expression data between the pulmonary embolism group and the healthy control group showed that differential methylation in the upstream region of genes was negatively correlated with gene expression. Among them, 8 significantly methylated genes in the upstream region of genes were screened out, and independent sample t-test and Pearson correlation analysis were done. In the pulmonary embolism group, there were 6 significant methylated genes of TSS1500, namely TSPO2, C1QA, AQP1, TNFSF9, MIA and STAB1, and the differential expression multiple log2FC of corresponding genes was 1.298, 1.629, 1.024, 2.746, 2.539, 1.060, respectively. The correlation between gene expression and gene methylation were -0.908, -0.900, -0.824, -0.784, -0.783, -0.779, respectively, and the methylation differences between the two groups were -0.049, -0.053, -0.048, -0.057, -0.050, respectively. -0.053 ( P < 0.05). There were three significantly methylated genes in the TSS200 region, namely TSPO2, SLC9A, and SIGLEC1. The gene expression differential multiple log2FC was 1.298, -2.252, and 1.866, respectively. The correlation between gene expression and gene methylation was -0.860, -0.774, and -0.739, respectively. The methylation difference between the two groups was -0.051, 0.027, -0.048 ( P < 0.05). In the pulmonary embolism group, 7 genes, including TSPO2, C1QA, AQP1, TNFSF9, MIA, STAB1 and SIGLEC1, showed hypomethylation and high expression in the TSS region. SLC9A3 gene showed high methylation and low expression. In the analysis of GO function, significant enrichment was obtained in complement activation, immune response and activation protein cascade. In the KEGG signaling pathway, the immune system, bacterial infection, and signaling molecules and interactions are significantly enriched, thereby regulating the occurrence of pulmonary embolism. Conclusions:Based on the combined analysis of DNA methylation and gene expression, a new idea of the occurrence and development of pulmonary embolism has been found, which can be further studied in the future.

Objective: To study the specific killing effect of CD4 membrane protein targeted chimeric antigen receptor modified T (CAR-T) cell. Methods: The second generation CD4 targeted chimeric antigen receptor containing 4-1BB costimulation domain was insert into lentiviral vector through recombinant DNA technology. Lentivirus was prepared and packaged by 293T cells with four plasmids. Beads activated T cells were transduced with lentivirus and the transduction efficiency was checked with Protein L and flow cytometry. T cell subsets and IFN-γ concentrations were detected with probe-tagged antibody and cytometric bead assay. Results: ①The transduction efficiency of activated T cells with prepared lentivirus were 50.0%-70.0%. A subset of CD8⁺ T cell acquired dim expression of CD4 membrane protein after activation. CD4⁺T cell and CD8⁺CD4^dim T cell were gradually killed by CD4 targeted CAR-T post lentivirus transduction. ②The kill efficacy of CD4 targeted CAR-T cell and control T cell toward KARPAS 299 T cell at an E∶T ratio of 8∶1 for 24 h was (96.9±2.1)% and (11.2±3.1)%, CAR-T cell has a higher killing efficacy than control T cell (t=7.137, P=0.028). The IFN-γ concentrations in culture supernatant of CAR-T cell with K562-CD4 cell, CAR-T cell with K562 cell and CAR-T cell alone were (15 648±2 168), (1 978±354) and (1 785±268) pg/ml, CAR-T cell cocultured with K562-CD4 cell produced more IFN-γ than the other two controls (P<0.01). Conclusions CD4 targeted CAR-T has an immunophenotype of CD8⁺CD4^-T cell. CD4 targeted CAR-T cell has killing efficacy toward normal CD4⁺T cell and CD4⁺T lymphoma cell. CD4 targeted CAR-T cell also has a killing efficacy toward CD4^dim target cell.

During coronavirus disease 2019 epidemic, the treatment of severe trauma has been impacted. The Consensus on emergency surgery and infection prevention and control for severe trauma patients with 2019 novel corona virus pneumonia was published online on February 12, 2020, providing a strong guidance for the emergency treatment of severe trauma and the self-protection of medical staffs in the early stage of the epidemic. With the Joint Prevention and Control Mechanism of the State Council renaming "novel coronavirus pneumonia" to "novel coronavirus infection" and the infection being managed with measures against class B infectious diseases since January 8, 2023, the consensus published in 2020 is no longer applicable to the emergency treatment of severe trauma in the new stage of epidemic prevention and control. In this context, led by the Chinese Traumatology Association, Chinese Trauma Surgeon Association, Trauma Medicine Branch of Chinese International Exchange and Promotive Association for Medical and Health Care, and Editorial Board of Chinese Journal of Traumatology, the Chinese expert consensus on emergency surgery for severe trauma and infection prevention during coronavirus disease 2019 epidemic ( version 2023) is formulated to ensure the effectiveness and safety in the treatment of severe trauma in the new stage. Based on the policy of the Joint Prevention and Control Mechanism of the State Council and by using evidence-based medical evidence as well as Delphi expert consultation and voting, 16 recommendations are put forward from the four aspects of the related definitions, infection prevention, preoperative assessment and preparation, emergency operation and postoperative management, hoping to provide a reference for severe trauma care in the new stage of the epidemic prevention and control.