Synergistic Effect of Detection and Separation for Pathogen Using Magnetic Clusters

Yong Tae Kim, Kook Han Kim, Eun Sung Kang, Geoncheol Jo, Se Young Ahn, Seon Hwa Park, Sung Il Kim, Saem Mun, Kyuwon Baek, Byeongyoon Kim, Kwangyeol Lee, Wan Soo Yun, Yong Ho Kim

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Early diagnosis of infectious diseases is important for treatment; therefore, selective and rapid detection of pathogenic bacteria is essential for human health. We report a strategy for highly selective detection and rapid separation of pathogenic microorganisms using magnetic nanoparticle clusters. Our approach to develop probes for pathogenic bacteria, including Salmonella, is based on a theoretically optimized model for the size of clustered magnetic nanoparticles. The clusters were modified to provide enhanced aqueous solubility and versatile conjugation sites for antibody immobilization. The clusters with the desired magnetic property were then prepared at critical micelle concentration (CMC) by evaporation-induced self-assembly (EISA). Two different types of target-specific antibodies for H- and O-antigens were incorporated on the cluster surface for selective binding to biological compartments of the flagella and cell body, respectively. For the two different specific binding properties, Salmonella were effectively captured with the O-antibody-coated polysorbate 80-coated magnetic nanoclusters (PCMNCs). The synergistic effect of combining selective targeting and the clustered magnetic probe leads to both selective and rapid detection of infectious pathogens.

Original languageEnglish
Pages (from-to)59-65
Number of pages7
JournalBioconjugate Chemistry
Issue number1
Publication statusPublished - 2016 Jan 20

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) grants funded by the Korea government (No. 2009-0083540, NRF-2015M3C1A3002152, NRF-2013R1A1A2065629) and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2014R1A1A2055647).

Publisher Copyright:
© 2015 American Chemical Society.

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering
  • Pharmacology
  • Pharmaceutical Science
  • Organic Chemistry


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