Abstract:
:The protein composition of oral fluid is modulated by environmental factors and physiological states, i.e. chemical, mechanical and pharmacologic stimuli, pathologic conditions, and psychological stress. Secretory protein concentrations in samples of whole saliva (WS) from children were measured and the results were subjected to statistical analysis. Protein expression was determined using electrophoresis and Western blotting. Protein profiles of children were significantly different from those of adults (n = 50, P < 0.05). All samples of saliva from children contained a group of high-molecular-weight (>90 kDa) proteins, whereas fewer than 5% of samples from adults had comparable bands. The ratio of the regulatory subunits (RII) of type II protein kinase A (an enzyme that regulates secretion) to total protein was stable in children's saliva, but variable in saliva from adults. Alpha amylase (alpha-amylase), an enzyme that digests carbohydrates, was less degraded in WS of children than in that of adults. Gingival crevicular fluid of both children and adults did not contain alpha-amylase or RII. No significant gender-based differences were found, but Caucasian children had higher salivary protein levels than children with an African background. Saliva collection is rapid, painless, non-invasive, economical, and yields findings that are reproducible. Objective, biochemical monitoring of secretory proteins in oral fluid of children may reveal responses to stressful stimuli.
journal_name
J Oral Scijournal_title
Journal of oral scienceauthors
Sivakumar T,Hand AR,Mednieks Mdoi
10.2334/josnusd.51.573subject
Has Abstractpub_date
2009-12-01 00:00:00pages
573-80issue
4eissn
1343-4934issn
1880-4926pii
JST.JSTAGE/josnusd/51.573journal_volume
51pub_type
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