Inhibitory activity against urease of quercetin glycosides isolated from Allium cepa and Psidium guajava

  • Biosci Biotechnol Biochem. 2010;74(4):878-80. doi: 10.1271/bbb.90895.
Samah Shabana  1 ,  Azusa Kawai ,  Kenji Kai ,  Kohki Akiyama ,  Hideo Hayashi
Affiliations
  • 1. Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan.
PMID: 20378972 DOI: 10.1271/bbb.90895
Abstract

Methanolic extracts of edible Plants and seaweeds were tested for their inhibitory activity against Jack bean Urease. Quercetin-4'-O-beta-D-glucopyranoside was isolated from Allium cepa as a Urease Inhibitor with an IC(50) value of 190 microM-. Quercetin and two quercetin glycosides, avicularin and guaijaverin, were isolated from Psidium guajava as Urease inhibitors with respective IC(50) values of 80 microM-, 140 microM-, and 120 microM-.

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