The role of human salivary acidic proline-rich proteins in the formation of acquired dental pellicle in vivo and their fate after adsorption to the human enamel surface

Archives of Oral Biology
A BennickG Madapallimattam

Abstract

The pellicles formed on fragments of human dental enamel worn on a palatal appliance for 1 min to 24 h were removed by acid extraction and the total amounts of protein and of acidic proline-rich proteins were determined. The percentage of total extracted protein constituted by the proline-rich proteins increased during the first hour of formation to about 37 per cent. Little difference was seen in total proline-rich protein between pellicles formed in a 1 and a 24-h period, but there was a gradual degradation of the proteins. There was no preferential retention of the N- or C-terminal parts of the proteins. Extracts of old acquired dental pellicle contained less than 0.1 per cent proline-rich proteins and pellicles more than 24 h old showed degradation of the adsorbed proline-rich proteins; there is no indication that the N-terminal part which contains the known biological activities was retained to a greater extent than the C-terminal part.

References

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