Changes in the composition of intestinal microbiota in mice with acute liver failure induced by D-galactosamine / 中华肝脏病杂志

Objective@#To investigate the changes in the composition of intestinal microbiota in mice with acute liver failure and identify characteristic bacteria, and to provide a basis for the diagnosis and treatment of acute liver failure with intestinal microbiota disorders.@*Methods@#A total of 30 specific pathogen-free male BALB/c mice were used in this study, including 25 mice in the model group and 5 mice in the control group. An acute liver failure model was induced by D-galactosamine. Microbial DNA was extracted from intestinal contents in different segments of the lower digestive tract (ileum and colon) and feces and then were amplified using PCR. The regions of 16S V3-V4 were subjected to high-throughput sequencing, followed by bioinformatics analyses, including OTU hierarchical clustering, species annotation, alpha-diversity analysis, and LEfSe (LDA Effect Size) analysis. Comparison of continuous data was made using t-test, while comparison of categorical data was made using χ2 test.@*Results@#A total of 10 mice survived in the two groups, with 80% mortality rate in the model group. The alpha-diversity analysis revealed increased bacterial diversity and abundance in the ileum, increased bacterial diversity and reduced bacterial abundance in the colon, and reduced bacterial diversity and insignificantly changed bacterial abundance in feces in the model group compared with the control group. Based on the optimized classification level, significantly reduced abundance of Clostridiaceae (44.95% ± 19.28% vs 7.51% ± 16.57%, P = 0.011) in the ileum, whereas significantly increased abundance of Rikenellaceae (1.08% ± 1.01% vs 4.18% ± 2.39%, P = 0.028), S24-7 (4.75% ± 4.87% vs 22.77% ± 13.05%, P = 0.020), and F16 (0.24% ± 0.28% vs 2.18% ± 1.61%, P = 0.029) in the colon were found in model group compared with the control group. The LEfSe analysis demonstrated that there were significant differences in Staphylococcaceae and S24-7 between the two groups, and S24-7 could be defined as the characteristic bacteria.@*Conclusion@#Intestinal microbiota disorders, especially the excessive growth of microbes in the ileum, are observed in mice with acute liver failure. Moreover, acute liver failure may be closely associated with the excessive growth of S24-7.

Genomics in Organ Transplantation / 한양의대학술지

The understanding of genetic diversities in humans by applying the state of the art genomic technologies has been accumulated and enriched since the last decades. Even in organ transplantation, these genomic technologies have not yet been widely applied and have less impact, except Human Leukocyte Antigen (HLA) matching. Pre- and post-operative care including surgical techniques in organ transplantation has improved reducing morbidity and mortality, but there are limitations and obstacles due to personal diversities coming from genetic variation. For this reason, the therapy combined with genomic information would be promising and beneficial in organ transplantation and would expect to give a new paradigm in personalized medicine in the near future. In this review, we introduce Next Generation Sequencing (NGS) technology and summarize potential benefits of these technologies in organ transplantation.

Applications and advances of flow fluorescence microbeads array / 国际生物医学工程杂志

Flow fluorescence microbeads array is a novel high throughput technique based on the combina tion of use of flow cytometry and use of fluorescence encoded microbeads as the solid phase for conventional im munoassay,affinity assay and DNA hybridization assay,.which offers a new approach to multiplexed assays for ap plications of large-scale screening.By utilizing appropriate fluorescence encoded micron-sized polymer particles, flow fluorescence microbeads array can be created to enable highly muhiplexed analysis of complex samples.Indi vidual sets of microbeads can be modified with reactive components such as antigens,antibodies or oligonu eleotides,then mixed with each other to form a multiplexed assay set.Flow fluorescence microbeads array com bines the specificity of fluorescence-encoded microbeads and the high sensitivity of flow cytometry,bears signifi cant potential as a general analysis platform for both research and clinical applications.Recent applications and advances are reviewed in this article.