alexa Anti-amyloidogenic property of leaf aqueous extract of Caesalpinia crista.
Pharmaceutical Sciences

Pharmaceutical Sciences

Medicinal & Aromatic Plants

Author(s): Ramesh BN, Indi SS, Rao KS

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Abstract Amyloid beta (Abeta) is the major etiological factor implicated in Alzheimer's disease (AD). Abeta(42) self-assembles to form oligomers and fibrils via multiple aggregation process. The recent studies aimed to decrease Abeta levels or prevention of Abeta aggregation which are the major targets for therapeutic intervention. Natural products as alternatives for AD drug discovery are a current trend. We evidenced that Caesalpinia crista leaf aqueous extract has anti-amyloidogenic potential. The studies on pharmacological properties of C. crista are very limited. Our study focused on ability of C. crista leaf aqueous extract on the prevention of (i) the formation of oligomers and aggregates from monomers (Phase I: Abeta(42)+extract co-incubation); (ii) the formation of fibrils from oligomers (Phase II: extract added after oligomers formation); and (iii) dis-aggregation of pre-formed fibrils (Phase III: aqueous extract added to matured fibrils and incubated for 9 days). The aggregation kinetics was monitored using thioflavin-T assay and transmission electron microscopy (TEM). The results showed that C. crista aqueous extract could able to inhibit the Abeta(42) aggregation from monomers and oligomers and also able to dis-aggregate the pre-formed fibrils. The study provides an insight on finding new natural products for AD therapeutics. Copyright 2010 Elsevier Ireland Ltd. All rights reserved. This article was published in Neurosci Lett and referenced in Medicinal & Aromatic Plants

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