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Characterization of human gene encoding SLA/LP autoantigen and its conserved homologs in mouse,fish,fly,and worm

World Journal of Gastroenterology 2006年第6期12卷 902-907页

作者： Chun-Xia Wang Andreas Teufel uta cheruti Joachim Groetzinger Peter R Galle Ansgar W Lohse Johannes Herkel I. Department of Medicine University Medical Centre Hamburg-Eppendorf Hamburg Germany Shandong University Shandong Provincial Hospital Jinan Shandong Province China I. Department ofMedicine Johannes Gutenberg University Mainz Germany Institute of Biochemistry Christian-Albretchts-University Kiel Germany

AIM： To approach the elusive function of the SLA/LP molecule, we have characterized genomic organization and conservation of the major antigenic and functional properties of the SLA/LP molecule in various species. METHODS： By means of computational biology, we have characterized the complete SLA/LP gene, mRNA and deduced protein sequences in man, mouse, zebrafish, fly, and worm. RESULTS： The human SLA/LP gene sequence of approximately 39 kb, which maps to chromosome 4p15.2, is organized in 11 exons, of which 10 or 11 are translated, depending on the splice variant. Homologous molecules were identified in several biological model organisms. The various homologous protein sequences showed a high degree of similarity or homology, notably at those residues that are of functional importance. The only domain of the human protein sequence that lacks significant homology with homologous sequences is the major antigenic epitope recognized by autoantibodies from autoimmune hepatitis （AIH） patients. CONCLUSION： The SLA/LP molecule and its functionally relevant residues have been highly conserved throughout the evoluti n, suggesting an indispensable function of the molecule. The finding that the only non-conserved domain is the dominant antigenic epitope of the human SLA/LP sequence, suggests that SLA/LP autoimmunity is autoantigen-driven rather than being driven by molecular mimicry.

关键词： Autoimmune hepatitis Autoantigen Genomics Bioinformatics

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Effects of Physical Parameters on Bacterial Cell Adsorption onto Pre-Imprinted Sol-Gel Films

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Journal of Biomaterials and Nanobiotechnology 2012年第4期3卷 499-507页

作者： Jeanna Starosvetsky Tally Cohen uta cheruti Dragoljub Dragoljub Robert Armon Center for Environmental Earth and Space Studies—Bemidji State University Bemidji USA Faculty of Civil and Environmental Engineering Division of Environmental Water and Agricultural Engineering Technion Haifa Israel

Organically modified silica (ORMOSILS) thin films produced by sol-gel method were imprinted with two bacterial strains as whole cells in order to develop an easy, fast and specific probe to detect and specifically identify these micro-organisms when present in water samples. An important feature of the imprinting process was the molecular finger-prints left by these microorganisms alongside morphology, into imprinted film cavities. The films also showed high selectivity toward the imprinted template and were able to discriminate between two very close bacterial species (E. coli and S. typhimurium). In addition, several central physical parameters of the experimental water solution were examined (i.e., pH, ionic strength and the organic load exemplified by NaCl and TOC concentration, respectively). The method sensitivity to different bacterial concentrations was studied by confocal microscopy (CLSM) and quartz crystal microbalance (QCM) tools. Results showed that increased bacterial concentrations favor rapid adsorption onto imprinted sol-gel films with high affinity, while low pH, increased organic load and high ionic concentrations (i.e., seawater) interfere with bacteria re-adsorption, reducing detection capability. Under average drinking water chemical composition the method proved to be highly efficient.

关键词： Detection Imprinting Sol-Gel Bacteria QCM E. coli O157:H7 S. typhimurium Sphaerotilus natans CLSM

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