Caffeic acid phenethyl ester exhibiting distinctive binding interaction with human serum albumin implies the pharmacokinetic basis of propolis bioactive components

Journal of Pharmaceutical and Biomedical Analysis
Hongliang LiFuliang Hu

Abstract

Caffeic acid phenethyl ester (CAPE), as one of the major bioactive components present in propolis, exhibits versatile bioactivities, especially for its potent cytotoxic effects on several cancer cell models. To understand the pharmacokinetic characteristics of CAPE, the binding interaction between CAPE and human serum albumin (HSA) was investigated in vitro using multiple spectroscopic methods and molecular docking. The results reveal that CAPE exhibits a distinctive binding interaction with HSA comparing with other propolis components. The association constant K(A) (L mol(-1)) of the binding reaches 10(6) order of magnitude, which is significantly stronger than the other components of propolis. Based on the theory of fluorescence resonance energy transfer, the binding distance was calculated as 5.7 nm, which is longer than that of the other components of propolis. The thermodynamic results indicate that the binding is mainly driven by hydrogen bonds and van der Waals force. The docking and drugs (warfarin and ibuprofen) competitive results show that CAPE is located in the subdomain IIA (Sudlow's site I, FA7) of HSA, and Gln196 and Lys199 contribute to the hydrogen bonds. Circular dichroism spectra suggest an alteration of the ...Continue Reading

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Citations

Apr 17, 2020·Food Science and Biotechnology·Hyunnho ChoHye Young Kim
Jan 20, 2021·International Journal of Radiation Biology·Xin ZhangYuhui Hao
Dec 22, 2020·Frontiers in Physiology·Henrique Silva, Nuno Miguel F Lopes
Aug 19, 2017·International Journal of Biological Macromolecules·Anali MansouriMojtaba Falahati

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