Search Results - Biotechnology

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This invention provides devices and methods for the interrogation of molecular structure and function of virtually any biological tissue  by allowing histological analyses of large biological tissues with numerous biomarkers (antibodies, RNAs, chemical labels). In addition, this technique maintains the integrity of large tissue samples making it possible to perform multiple rounds of histological staining to resolve 3-D organization of biological structures at the macroscopic and microscope scale.

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This invention provides a new strategy for nucleic acid delivery by using novel cross-linkable and surface-charge modifiable synthetic polymers. The use of the novel polymer system allows for robust nuclecid-polymer complexation, easy removal of cationic moieties of the polymer and self-crosslinking of the polymer in a single step, and stimuli-responsive release of the nucleic acid molecules in the cell.

This invention provides economical, bio-interactive surfaces and surface treatment methods for selective capture of targeted epithelial cells or other cell types from cell mixtures or complex biological fluids. Preparation or fabrication of the engineered surfaces provided by this technology does not require the use of expensive and unstable biomolecular materials, and the resulting surfaces can distinguish different cell types or cells that express different levels of the same surface adhesion marker. Such engineered surfaces can be used as economical tools for assessment of cancer risk, cancer diagnosis, and tracking of the effectiveness of cancer treatments, among other potential applications.

This invention provides economical, renewable surfaces and related methods for selective capture of bacteria in a fluid medium and for killing and/or release of the captured bacteria. The fabrication of these surfaces or surface-treated substrate materials does not require the use of expensive biomolecules and toxic chemicals. The surfaces capture and kill bacteria on contact without leaching any toxic antimicrobial agents. The surfaces can rapidly release captured or killed bacteria via mechanical means, and thus are easily renewable for subsequent round of bacterial capture, killing and release, which makes them ideal for use in on-line bacterial sensor systems. In addition, the surfaces can be engineered to selectively capture bacteria from complex fluid media or selectively capture one bacterial strain over another.

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This invention provides a novel therapeutic platform to combat multidrug-resistant bacterial and biofilm infections using engineered polymeric nanoparticles. The polymeric nanoparticles can penetrate and eradicate pre-formed bacterial biofilms while maintaining high therapeutic indices. The nanoparticles are formed via self-assembly of engineered synthetic polymers in aqueous solutions, without the need to use any organic solvent or purification procedures.

This invention provides miniaturized and portable biosensing devices that employ novel spectrally-filtered photodiode pairs and on-chip ratiometric sensing. The biosensing devices allow for rapid, high-precision detection of biomolecules of interest, and can be used for point-of-care and therapeutic screening applications.