RESUMEN
Soluble, small amyloid-ß oligomers (AßO) are recognized as significant contributors to the pathology of Alzheimer's disease (AD). Although drugs for treating AD symptoms have been approved, no therapy targeting amyloid-ß (Aß) capable of modifying the course of the disease is available. In an effort to develop a label-free method for screening new anti-AD therapeutic agents, we show the use of a surface-enhanced Raman scattering (SERS) active substrate for detecting the interactions between Aß peptides and spin-labeled fluorine (SLF), a peptide aggregation inhibitor. Changes in the peak positions and intensity ratios of two spectral peaks near 1600cm-1 and 2900cm-1 can be used to monitor the molecular interactions between SLF and Aß. This study demonstrates the potential of SERS spectroscopy for rapidly screening and identifying new anti-Aß therapeutic agents.