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Preparation and evaluation of spore-specific affinity-augmented bio-imprinted beads

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Abstract

A novel, affinity-augmented, bacterial spore-imprinted, bead material was synthesized, based on a procedure developed for vegetative bacteria. The imprinted beads were intended as a front-end spore capture/concentration stage of an integrated biological detection system. Our approach involved embedding bead surfaces with Bacillus thuringiensis kurstaki (Bt) spores (as a surrogate for Bacillus anthracis) during synthesis. Subsequent steps involved lithographic deactivation using a perfluoroether; spore removal to create imprint sites; and coating imprints with the lectin, concanavalin A, to provide general affinity. The synthesis of the intended material with the desired imprints was verified by scanning electron and confocal laser-scanning microscopy. The material was evaluated using spore-binding assays with either Bt or Bacillus subtilis (Bs) spores. The binding assays indicated strong spore-binding capability and a robust imprinting effect that accounted for 25% additional binding over non-imprinted controls. The binding assay results also indicated that further refinement of the surface deactivation procedure would enhance the performance of the imprinted substrate.

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Acknowledgments

We gratefully acknowledge the Laboratory Directed Research and Development program for funding this research through the Homeland Security Initiative at Pacific Northwest National Laboratory. We also acknowledge the assistance of Catherine E. Petersen in collecting MALDI spectra. Pacific Northwest National Laboratory is a multi-program national laboratory operated by the Battelle Memorial Institute for the U.S. Department of Energy under contract DE-AC06-76RLO 1830.

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Authors and Affiliations

  1. Pacific Northwest National Laboratory, P.O. Box 999/MSIN P8-50, Richland, WA, 99352, USA

    Scott D. Harvey, Gary M. Mong, Richard M. Ozanich, Jeffrey S. Mclean, Shannon M. Goodwin, Nancy B. Valentine & Jim K. Fredrickson

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  1. Scott D. Harvey
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  2. Gary M. Mong
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  3. Richard M. Ozanich
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  4. Jeffrey S. Mclean
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  6. Nancy B. Valentine
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  7. Jim K. Fredrickson
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Correspondence to Scott D. Harvey.

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Harvey, S.D., Mong, G.M., Ozanich, R.M. et al. Preparation and evaluation of spore-specific affinity-augmented bio-imprinted beads. Anal Bioanal Chem 386, 211–219 (2006). https://doi.org/10.1007/s00216-006-0622-z

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  • DOI: https://doi.org/10.1007/s00216-006-0622-z

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