Chemical and biochemical characterization of lignan analogs as novel PAF receptor antagonists.

Abstract:

:Various derivatives and isosteres of neolignans of the 2,5-diaryl tetrahydrofuran type have been synthesized as antagonists of platelet-activating factor (PAF). A detailed analysis of their structure-activity relationship (SAR) has revealed a clear preference for an asymmetrical molecular configuration with a high degree of stereo and chiral specificity associated with greater potency. The trans-2S,5S enantiomers are generally 10-200 times more potent in vitro than their corresponding cis or trans-2R,5R isomers. A similar stereochemical preference is indicated by the recently reported PAF antagonist MK-287 which has undergone clinical evaluation. An azido derivative L-662,025 has been characterized as a photolabile irreversible antagonist of PAF for the investigation of solubilized and partially purified PAF binding proteins from cell membranes. The biological justification for concomitant inhibition of both PAF receptor and 5-lipoxygenase in inflammation is well recognized. The feasibility of developing such dual-functional agents has been demonstrated by a group of dithiolane analogs of neolignans and several derivatives of futoenone.

journal_name

Lipids

journal_title

Lipids

authors

Shen TY

doi

10.1007/BF02536521

subject

Has Abstract

pub_date

1991-12-01 00:00:00

pages

1154-6

issue

12

eissn

0024-4201

issn

1558-9307

journal_volume

26

pub_type

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