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Abstract Title:

Kinase inhibitors from Polygonum cuspidatum.

Abstract Source:

J Nat Prod. 1993 Oct;56(10):1805-10. PMID: 8277318

Abstract Author(s):

G S Jayatilake, H Jayasuriya, E S Lee, N M Koonchanok, R L Geahlen, C L Ashendel, J L McLaughlin, C J Chang

Article Affiliation:

Department of Medicinal Chemistry and Pharmacognosy, School of Pharmacy and Pharmacal Sciences, Purdue University, West Lafayette, Indiana 47907.

Abstract:

Bioassay-directed fractionation of a medicinal plant, Polygonum cuspidatum (Polygonaceae), has led to the discovery of a hydroxystilbene, resveratrol [1], as an inhibitor of a protein-tyrosine kinase (p56lck) partially purified from bovine thymus. Both trans and cis isomers of resveratrol possess comparable protein-tyrosine kinase inhibitory activity. Comparison of the IC50 values of resveratrol for protein-tyrosine kinase inhibitory activity with those of piceid (resveratrol-O3-beta-glucoside) [2] and resveratrol-O4'-beta-glucoside [3] shows the requirement of free hydroxyl groups on both phenyl rings for the protein-tyrosine kinase inhibition. Protein kinase C inhibitory analysis suggests the requirements of two free hydroxyl groups on one phenyl ring only.

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Sayer Ji
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