2017年6月8日木曜日

Brassinins As Indoleamine Dioxygenase Dioxygenase 2005



Structure−Activity Study of Brassinin Derivatives as Indoleamine 2,3-Dioxygenase Inhibitors


 
J. Med. Chem., 2006, 49 (2), pp 684–692
DOI: 10.1021/jm0508888
Publication Date (Web): December 17, 2005
Copyright © 2006 American Chemical Society

Abstract

Abstract Image
 
 
 
 
A screen of indole-based structures revealed the natural product brassinin to be a moderate inhibitor of indoleamine 2,3-dioxygenase (IDO), a new cancer immunosuppression target. A structure−activity study was undertaken to determine which elements of the brassinin structure could be modified to enhance potency. Three important discoveries have been made, which will impact future IDO inhibitor development:  (i) The dithiocarbamate portion of the brassinin lead is a crucial moiety, which may be binding to the heme iron of IDO; (ii) an indole ring is not necessary for IDO inhibition; and (iii) substitution of the S-methyl group of brassinin with large aromatic groups provides inhibitors that are three times more potent in vitro than the most commonly used IDO inhibitor, 1-methyl-tryptophan.



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Article Views: 2,752 Times
Received 8 September 2005
Published online 17 December 2005
Published in print 1 January 2006
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