Addition of Strawberries to the Usual Diet Decreases Resting Chemiluminescence of Fasting Blood in Healthy Subjects – Possible Health Promoting Effect of These Fruits Consumption
PBN-AR
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EN
Czasopismo
JOURNAL OF THE AMERICAN COLLEGE OF NUTRITION
ISSN
0731-5724
EISSN
Wydawca
AMER COLLEGE NUTRITION
DOI
URL
Rok publikacji
2014
Numer zeszytu
4
Strony od-do
274-287
Numer tomu
33
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Słowa kluczowe
angielski
bioactive compounds
diets
general nutrition
preventative nutrition and chronic disease
supplements and functional foods
Open access
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angielski
Treść
Objective: Regular strawberry consumption augmented plasma antioxidant activity and decreased lipid peroxidation suggests preventive potential of these fruits against oxidative stress-dependent disorders. Blood phagocytes are important source of oxidants that may contribute to systemic oxidative stress. We examined the effect of strawberry consumption on the luminol enhanced whole blood chemiluminescence (LBCL) reflecting oxidants generation by circulating phagocytes in healthy subjects. Methods: Thirty-one healthy subjects (being on their usual diet) consumed 500 g of strawberry pulp daily (between 11.00–14.00) for 30 days (1st strawberry course) and after 10 day wash-out the cycle was repeated (2nd strawberry course). Fasting blood and spot morning urine samples were collected before and after each strawberry course for measuring resting and agonist (fMLP)-induced LBCL, various phenolics and plasma antioxidant activity. Twenty subjects served as a control in respect to LBCL changes over the study period. Results: Strawberry consumption decreased median resting LBCL and this effect was more evident after the 1st course (by 38.2%, p < 0.05) than after the the 2nd one (18.7%), while fMLP-induced LBCL was constant. No changes in LBCL were noted in controls. Strawberries increased fasting plasma levels of caffeic acid and homovanillic acid as well as urolithin A and 4-hydroxyhippuric acid in spot urine. Plasma antioxidant activity and the number of circulating phagocytes did not change over the study period. Resting LBCL correlated positively with the number of circulating polymorphonuclear leukocytes at all occasions and negative correlation with plasma 4-hydroxyhippuric acid was noted especially after the first strawberry course (r = −0.46, p < 0.05). Conclusions: The decrease in resting LBCL suggests that regular strawberry consumption may suppress baseline formation of oxidants by circulating phagocytes. This may decrease the risk of systemic imbalance between oxidants and anti-oxidants and be one of mechanisms of health-promoting effect of these fruits consumption.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
606544
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