Aminoglycoside antibiotic-derived anion-exchange microbeads for plasmid DNA binding and in situ DNA capture

Taraka Sai Pavan Grandhi, Amrita Mallik, Nan Lin, Bhavani Miryala, Thrimoorthy Potta, Yifan Tian, Kaushal Rege

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Plasmid DNA (pDNA) therapeutics are being investigated for gene therapy and DNA vaccines against diseases including cancer, cystic fibrosis and AIDS. In addition, several applications in modern biotechnology require pDNA for transient protein production. Here, we describe the synthesis, characterization, and evaluation of microbeads ("Amikabeads") derived from the aminoglycoside antibiotic amikacin for pDNA binding and in situ DNA capture from mammalian cells. The parental aminoglycoside-derived microbeads (Amikabeads-P) acted as anion-exchange materials, and demonstrated high capacities for binding pDNA. Binding of pDNA was significantly enhanced following quaternization of the amines on the microbeads (Amikabeads-Q). Amikabeads were further employed for the disruption and extraction of DNA from mammalian cells, indicating their utility for in situ DNA capture. Our results indicate that Amikabeads are a novel material, with multiple reactive groups for further conjugation, and can have several applications in plasmid DNA biotechnology.

Original languageEnglish (US)
Pages (from-to)18577-18589
Number of pages13
JournalACS Applied Materials and Interfaces
Issue number21
StatePublished - Nov 12 2014


  • DNA biotechnology
  • bioseparations
  • chromatography
  • microgel
  • plasmid DNA binding
  • whole cell genomic extraction

ASJC Scopus subject areas

  • General Materials Science


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