Effect of various pH values, ionic strength, and temperature on papain hydrolysis of salivary film.

Abstract:

:Stimulated human whole saliva (WS) was used to study the dynamics of papain hydrolysis at defined pH, ionic strength, and temperature with the view of reducing an acquired pellicle. A quartz crystal microbalance with dissipation (QCM-D) was used to monitor the changes in frequency caused by enzyme hydrolysis of WS films, and the hydrolytic parameters were calculated using an empirical model. The morphological and conformational changes of the salivary films before and after enzymatic hydrolysis were characterized by atomic force microscopy (AFM) imaging and grazing-angle Fourier transform infrared (GA-FTIR ) spectra, respectively. The characteristics of papain hydrolysis of WS films were pH-, ionic strength-, and temperature-dependent. The WS films were partially removed by the action of papain, resulting in thinner and smoother surfaces. The infrared data suggested that hydrolysis-induced deformation did not occur on the remnants of salivary films. The processes of papain hydrolysis of WS films can be controlled by properly regulating pH, ionic strength, and temperature.

journal_name

Eur J Oral Sci

authors

Yao JW,Xiao Y,Lin F

doi

10.1111/j.1600-0722.2012.00942.x

subject

Has Abstract

pub_date

2012-04-01 00:00:00

pages

140-6

issue

2

eissn

0909-8836

issn

1600-0722

journal_volume

120

pub_type

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