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Research Article

Effect of adsorbed protein on hydroxyapatite zeta potential and Streptococcus mutans adherence.

E C Reynolds, A Wong
E C Reynolds
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A Wong
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DOI: 
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ABSTRACT

The adherence of Streptococcus mutans PK1 to hydroxyapatite disks pretreated with various acidic and basic proteins in imidazole buffer was studied. Adsorption of a basic protein onto an hydroxyapatite disk enhanced or had no effect on bacterial adherence, whereas adsorption of an acidic protein reduced adherence. The effect of adsorbed protein on bacterial adherence was of both short and long range. The long-range effect of the acidic proteins in reducing the number of bacteria adhering to hydroxyapatite was related to protein adsorption causing an increase in surface net negative charge, as shown by zeta potential measurement. Basic protein produced a net positive surface charge which facilitated adherence. Within the acidic protein group, the acidic residue percentage of the adsorbed protein was negatively correlated with the number of bacteria adhering, whereas the nonpolar residue percentage was positively correlated with bacterial adherence. Within the basic protein group, the basic residue percentage was correlated with the number of cells adhering. These results indicate the involvement of short-range hydrophobic and ionic interactions in bacterial adherence to protein-coated hydroxyapatite.

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Effect of adsorbed protein on hydroxyapatite zeta potential and Streptococcus mutans adherence.
E C Reynolds, A Wong
Infection and Immunity Mar 1983, 39 (3) 1285-1290; DOI:

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Effect of adsorbed protein on hydroxyapatite zeta potential and Streptococcus mutans adherence.
E C Reynolds, A Wong
Infection and Immunity Mar 1983, 39 (3) 1285-1290; DOI:
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