A resorcinarene for inhibition of A beta fibrillation

作者：Han Xu; Park Jiyong; Wu Wei; Malagon Andres; Wang Lingyu; Vargas Edgar; Wikramanayake Athula; Houk K N^*; Leblanc Roger M^*

来源：Chemical Science, 2017, 8(3): 2003-2009.

DOI：10.1039/c6sc04854d

Amyloid-beta peptides (A beta) fibrillation is the hallmark of Alzheimer's disease (AD). However, it has been challenging to discover potent agents in order to inhibit Ab fibrillation. Herein, we demonstrated the effect of resorcinarene on inhibiting A beta fibrillation in vitro via experimental and computational methods. Ab were incubated with different concentrations of resorcinarene so as to monitor the kinetics by using thioflavin T binding assay. The results, which were further confirmed by far-UV CD spectroscopy and atomic force microscopy, strongly indicated that the higher concentration of resorcinarene, the more effective the inhibition of A beta fibrillation. A cytotoxicity study showed that when sea urchin embryos were exposed to the resorcinarene, the majority survived due to the resorcinarene low toxicity. In addition, when the resorcinarene was added, the formation of toxic A beta 42 species was delayed. Computational studies of A beta fibrillation, including docking simulations and MD simulations, illustrated that the interaction between inhibitor resorcinarene and A beta is driven by the non-polar interactions. These studies display a novel strategy for the exploration of promising antiamyloiddogenic agents for AD treatments.

• 出版日期2017