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ViriChip: a solid phase assay for detection and identification of viruses by atomic force microscopy

Saju R Nettikadan1,4, James C Johnson1,3, Srikanth G Vengasandra1, James Muys1 and Eric Henderson1,2

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Bionanotechnology can be viewed as the integration of tools and concepts in nanotechnology with the attributes of biomolecules. We report here on an atomic force microscopy–immunosensor assay (AFMIA) that couples AFM with solid phase affinity capture of biological entities for the rapid detection and identification of group B coxsackievirus particles. Virus identification is based on type-specific immunocapture and the morphological properties of the captured viruses as obtained by the AFM. Representatives of the six group B coxsackieviruses have been specifically captured from 1 µl volumes of clarified cell lysates, body fluids and environmental samples. Concentration and kinetic profiles for capture indicate that detection is possible at 103 TCID50 µl−1 and the dynamic range of the assay spans three logs. The results demonstrate that the melding of a nanotechnological tool (AFM) with biotechnology (solid phase immunocapture of virus particles) can create a clinically relevant platform, useful for the detection and identification of enterovirus particles in a variety of samples.


PACS

87.85.Qr Nanotechnologies-design

82.39.-k Chemical kinetics in biological systems

87.64.Dz Scanning tunneling and atomic force microscopy

87.14.-g Biomolecules: types

Subjects

Medical physics

Biological physics

Chemical physics and physical chemistry

Dates

Issue 3 (March 2004)

Received 24 October 2003

Published 19 January 2004



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