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Archives of Oral Biology 2011-Jul

Saliva electrophoretic protein profiles in infants: changes with age and impact of teeth eruption and diet transition.

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M Morzel
O Palicki
C Chabanet
G Lucchi
P Ducoroy
C Chambon
S Nicklaus

키워드

요약

OBJECTIVE

The objective of this study was to describe the changes in salivary protein profiles in infants between the ages of 3 and 6 months, and to evaluate the impact of teeth eruption and introduction of solid foods on such profiles.

METHODS

73 infants were followed longitudinally at 3 and 6 months of age. Their whole saliva proteins were separated by SDS-PAGE electrophoresis and semi-quantified by image analysis. Amylase activity was also measured on a sub-sample of the population (n=42 infants). Bands which abundance was significantly different between the two ages according to paired comparisons were identified by mass spectrometry techniques.

RESULTS

Out of 21 bands, 13 were significantly different between 3 and 6 months of age. Two short variants of amylase increased in abundance with age, as did amylase activity. Other changes possibly translated developmental physiological events, for example maturation of the adaptive immune system. The balance between S-type cystatins and cystatins A and B was modified, in favour of S-type cystatins at 6 months of age. Teeth eruption resulted in an increase in albumin abundance, whilst introduction of solid foods was associated with higher levels of β-2 microglobulin and S-type cystatins.

CONCLUSIONS

Salivary profiles were modified substantially between the ages of 3 and 6 months. Both teeth eruption and diet had an impact on abundance changes for some proteins, revealing dynamic interactions between saliva proteome, oral physiology and diet.

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