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Strawberry extract protects skin against UV
rays
Sunday August 05, 2012 06:07:50 PM,
IANS
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Madrid: A strawberry
extract developed by Italian and Spanish researchers seems to
protect the skin against harmful ultraviolet (UV) radiation and
reduce damage to DNA.
"We have verified the protecting effect of strawberry extract
against damage to skins cells caused by UVA rays," said Maurizio
Battino, researcher at the Universita Politecnica delle Marche in
Italy, who led the joint Spanish and Italian study.
UVA and UVB are two types of ultraviolet radiation emitted by the
sun, which penetrate the earth's atmosphere. They cause premature
aging or wrinkling of the skin. Other damaging effects are
cataracts, weakening of the immune system, and skin cancer, the
Journal of Agricultural Food Chemistry reported.
The team prepared human skin cell cultures (fibroblasts) and added
strawberry extract in different concentrations. Using ultraviolet
light, the samples were then exposed to a dose "equivalent to 90
minutes of midday summer sun in the French Riviera," according to
a statement of FECYT, Spanish Foundation for Science and
Technology.
Data confirm that the strawberry extract, especially at a
concentration of 0.5 mg per millitre, displays photoprotective
properties in those fibroblasts exposed to UVA radiation, it
increases cell survival and viability and decreases damage in the
DNA when compared with control cells.
"These aspects are of great importance as they provide protection
for cell lines subject to conditions that can provoke cancer and
other skin-related inflammatory and degenerative illnesses,"
outlines Battino.
But what molecules give strawberries their photoprotective
properties? Scientists suspect that it could be the anthocyanins,
which are pigments that give leaves, flowers and fruits their red
colour. Analyses have confirmed that extracts are rich in such
substances.
"These compounds have important anti-inflammatory, antioxidant and
anti-tumour properties and are capable of modulating enzymatic
processes," explained study co-author Sara Tulipani from the
University of Barcelona.
"We have not yet found a direct relationship between their
presence and photoprotective properties," she added.
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