Abstract
The β-amyloid peptide (1-42) is a molecule capable of aggregating into neurotoxic structures that have
been implicated as potential etiological factors of Alzheimer’s Disease. The aim of this study was to evaluate the
inhibition of β-amyloid aggregation of ethyl acetate and ethanolic extracts obtained from Ugni molinae leaves on
neurotoxic actions of β-amyloid aggregates. Chemical analyses were carried out with the extracts in order to
determine their phenolic profile and its quantification. Both extracts showed a tendency to reduce neuronal deaths
caused by β-amyloid. This tendency was inversely proportional to the evaluated concentrations. Moreover, the
effect of EAE and ETE on β-amyloid aggregation was studied by fluorimetric T Thioflavin assay and transmission
electronic microscopy (TEM); the extracts showed a modulation in the aggregation process. Partly, it is
believed that these effects can be attributed to the polyphenolic compounds present in the extracts.
Keywords:
Ugni molinae, β-amyloid aggregation, T Thioflavin, polyphenols, β-amyloid disaggregation, fluorimetric.
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