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Non-destructive visualisation of protective proteins in the in situ pellicle

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Abstract

Several salivary anti-microbial and buffering components are part of the acquired in vivo pellicle. The purpose of the present in situ study was to visualise these proteins within the in situ formed pellicle and to investigate their distribution with respect to pellicle formation time and intra-oral localisation. Bovine enamel slabs were fixed on individual splints. They were carried by 6 subjects buccally and palatally in the region of the upper first molar teeth over 30 and 120 min, respectively, for in situ pellicle formation. After intra-oral exposure, enamel specimens were processed for transmission electron microscopy. Secretory immunoglobulin A (sIgA), lactoferrin, lysozyme, carbonic anhydrase (CA) I and II were visualised successfully in the in situ pellicle layer by gold immuno-labelling. All components were found to be distributed randomly within all layers of the pellicle. Significantly higher amounts of the proteins were detected after 120 min of formation time. Furthermore, significantly more labelled lactoferrin and lysozyme were found on buccal surfaces compared with palatal sites. For CA I, CA II and sIgA, no significant influence of the localisation was detected. All investigated anti-bacterial and buffering proteins are distributed randomly in the in situ formed pellicle layer and thus could contribute to its protective properties as an early defence barrier.

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Acknowledgement

This study was supported by the German Research Foundation (Projects Ha 2718/3-1, 3-2, 3-3, Ha 5192/1-2) and by a grant from the Research Committee of the Saarland University.

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Authors and Affiliations

  1. Department of Operative Dentistry and Periodontology, Albert Ludwigs University of Freiburg, Freiburg, Germany

    Daniela Deimling, Christian Hannig & Philipp Schmitz

  2. Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, Building 73, 66421, Homburg/Saar, Germany

    Wiebke Hoth-Hannig & Matthias Hannig

  3. Institute of Medical Biometry and Statistics, Albert Ludwigs University of Freiburg, Freiburg, Germany

    Jürgen Schulte-Mönting

Authors
  1. Daniela Deimling
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  2. Christian Hannig
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  3. Wiebke Hoth-Hannig
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  4. Philipp Schmitz
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  5. Jürgen Schulte-Mönting
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  6. Matthias Hannig
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Correspondence to Matthias Hannig.

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Deimling, D., Hannig, C., Hoth-Hannig, W. et al. Non-destructive visualisation of protective proteins in the in situ pellicle. Clin Oral Invest 11, 211–216 (2007). https://doi.org/10.1007/s00784-007-0112-5

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  • DOI: https://doi.org/10.1007/s00784-007-0112-5

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