How Different Snacks Produce a Distinct Effect in Salivary Protein Composition
Carla Simões1, Inês Caeiro1, Laura Carreira1
1Mediterranean Institute for Agricultural, Environmental and Development, University of Évora, 7002-556 Évora, Portugal.
Molecules (Basel, Switzerland)
|April 30, 2021
Summary
Dietary intake significantly alters saliva composition and flow rate. Specific foods like yogurt and apple cause immediate increases in salivary alpha-amylase and protein levels, impacting oral functions.
Area of Science:
- Oral biology
- Biochemistry
- Nutrition science
Background:
- Dietary components are known to influence saliva, but specific food effects on salivary composition and dynamics are poorly understood.
- Understanding these short-term salivary changes is crucial for insights into oral health and food perception.
Purpose of the Study:
- To investigate the immediate effects of different food types on saliva secretion and protein profiles.
- To analyze how snacks like yogurt, bread, apple, and walnuts impact salivary flow rate and specific protein expressions.
Main Methods:
- Twelve participants consumed four different snacks: yogurt, bread, apple, and walnuts.
- Saliva samples were collected pre-snack and at 0, 5, and 30 minutes post-snack.
- Analysis included salivary flow rate, total protein concentration, alpha-amylase activity, and protein profiling.
Main Results:
- Yogurt and apple consumption led to the most significant salivary changes, including increased flow rate and alpha-amylase activity.
- Immunoglobulin levels decreased across all snack types, while cystatins and proline-rich proteins (PRPs) increased post-yogurt.
- Walnuts induced minimal changes, though one PRP band showed an increase, possibly due to lower consumption amounts.
Conclusions:
- Food type significantly influences short-term salivary secretion and protein composition.
- Specific salivary proteins involved in food processing and perception exhibit variable responses to different dietary intakes.
- These findings highlight the dynamic relationship between diet and oral physiology.
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