PubMed · 14424500
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J MOSBECH, H P OSTERGAARD KRISTENSEN. 1960-07-14. [Chronic sialoadenitis caused by autoimmunization].. https://pubmed.ncbi.nlm.nih.gov/14424500/
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Immunoporation is a recently discovered method that is able to transfect various human cell lines efficiently by targeting the cell surface antigens with antibody-coated beads. For this particular study, HL60, a cell line difficult to transfect by other methods, was used as a model to define the various parameters of the cell membrane that determine the efficiency of this method. The level of antigen expression on the cell surface was the first parameter to be analyzed and experiments indicated that there is a close correlation between the level of expression of surface antigens and the efficiency of immunoporation. The mixing speed, the bead to cell ratio, and the mixing time were all found to affect the ability of the antigen-coated beads to pull holes in the cells and it was found that for HL60 cells the optimum mixing speed was 40 rpm and the bead to cell ratio was 20:1 using a mixing time of 6 h.
We use a gold-nanoparticle coated film to achieve highly spatially resolved biosensing that is based on localized surface-plasmon resonance. Unlike the planar gold film employed for conventional surface-plasmon resonance sensing, the gold-nanoparticle film relies exclusively on shifting of the peak extinction wavelength for detection of biointeraction and does not depend critically on the angle of incidence. These characteristics permit integration of surface-plasmon resonance with large-numerical-aperture optics to achieve biosensing with high sensitivity and spatial resolution as high as 25 microm.
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