North JR et al. (MAY 2016)
Journal of biotechnology 226 24--34
A novel approach for emerging and antibiotic resistant infections: Innate defense regulators as an agnostic therapy.
Innate Defense Regulators (IDRs) are short synthetic peptides that target the host innate immune system via an intracellular adaptor protein which functions at key signaling nodes. In this work,further details of the mechanism of action of IDRs have been discovered. The studies reported here show that the lead clinical IDR,SGX94,has broad-spectrum activity against Gram-negative and Gram-positive bacterial infections caused by intracellular or extracellular bacteria and also complements the actions of standard of care antibiotics. Based on in vivo and primary cell culture studies,this activity is shown to result from the primary action of SGX94 on tissue-resident cells and subsequent secondary signaling to activate myeloid-derived cells,resulting in enhanced bacterial clearance and increased survival. Data from non-clinical and clinical studies also show that SGX94 treatment modulates pro-inflammatory and anti-inflammatory cytokine levels,thereby mitigating the deleterious inflammatory consequences of innate immune activation. Since they act through host pathways to provide both broad-spectrum anti-infective capability as well as control of inflammation,IDRs are unlikely to be impacted by resistance mechanisms and offer potential clinical advantages in the fight against emerging and antibiotic resistant bacterial infections.
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70025
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冻存的人外周血单个核细胞
冻存的人外周血单个核细胞
冻存的人外周血单个核细胞
冻存的人外周血单个核细胞
Kechaou N et al. (MAR 2013)
Applied and environmental microbiology 79 5 1491--9
Identification of one novel candidate probiotic Lactobacillus plantarum strain active against influenza virus infection in mice by a large-scale screening.
In this study,we developed a large-scale screening of bacterial strains in order to identify novel candidate probiotics with immunomodulatory properties. For this,158 strains,including a majority of lactic acid bacteria (LAB),were screened by two different cellular models: tumor necrosis factor alpha (TNF-α)-activated HT-29 cells and peripheral blood mononuclear cells (PBMCs). Different strains responsive to both models (pro- and anti-inflammatory strains) were selected,and their protective effects were tested in vivo in a murine model of influenza virus infection. Daily intragastric administrations during 10 days before and 10 days after viral challenge (100 PFU of influenza virus H1N1 strain A Puerto Rico/8/1934 [A/PR8/34]/mouse) of Lactobacillus plantarum CNRZ1997,one potentially proinflammatory probiotic strain,led to a significant improvement in mouse health by reducing weight loss,alleviating clinical symptoms,and inhibiting significantly virus proliferation in lungs. In conclusion,in this study,we have combined two cellular models to allow the screening of a large number of LAB for their immunomodulatory properties. Moreover,we identified a novel candidate probiotic strain,L. plantarum CNRZ1997,active against influenza virus infection in mice.
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Zeng J et al. (MAY 2012)
The Journal of Immunology 188 9 4297--4304
Enhancing Immunostimulatory Function of Human Embryonic Stem Cell-Derived Dendritic Cells by CD1d Overexpression
Human embryonic stem cell-derived dendritic cells (hESC-DCs) may potentially provide a platform to generate off-the-shelf" therapeutic cancer vaccines. To apply hESC-DCs for cancer immunotherapy in a semiallogeneic setting�
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