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Characterization of collagen fibers in Bruch’s membrane using chemical force microscopy

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Abstract

Bruch’s membrane is a layer composed of collagen fibers located just beneath the retina. This study validates a strategy used to map the morphological and adhesion characteristics of collagen fibers in Bruch’s membrane. Atomic force microscopy tips were functionalized with different chemical groups and used to map the hydrophilic and hydrophobic regions on the surface of the eye tissue. The largest adhesion forces were observed when tips functionalized with NH2 groups were used. The trend in the adhesion forces was rationalized based on the distribution of different functional groups in the triple-helical structure of the collagen fibers. The results of this study can be used to design more effective strategies to treat eye diseases such as age-related macular degeneration.

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Acknowledgements

This work was supported by the Bindley Biosciences Center at Purdue. We thank the veterinary staff of the Weldon School of Biomedical Engineering for extracting the eyes after pig surgery. SB thanks NSF for support through the REU program (EEC-0353901).

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Authors and Affiliations

  1. Department of Physics, Purdue University, West Lafayette, IN, 47907, USA

    Shrestha Basu Mallick

  2. Department of Biomedical Engineering, University of Miami, Coral Gables, FL, 33124, USA

    Sandhya Bhagwandin

  3. Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA

    Albena Ivanisevic

  4. Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA

    Albena Ivanisevic

Authors
  1. Shrestha Basu Mallick
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  2. Sandhya Bhagwandin
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  3. Albena Ivanisevic
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Correspondence to Albena Ivanisevic.

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Mallick, S.B., Bhagwandin, S. & Ivanisevic, A. Characterization of collagen fibers in Bruch’s membrane using chemical force microscopy. Anal Bioanal Chem 386, 652–657 (2006). https://doi.org/10.1007/s00216-006-0538-7

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  • DOI: https://doi.org/10.1007/s00216-006-0538-7

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