Immuno-suppressive effect of blocking the CD28 signaling pathway in T-cells by an active component of Echinacea found by a novel pharmaceutical screening method.

Abstract:

:AFTIR (after flowing through immobilized receptor) is a novel method for screening herbal extracts for pharmaceutical properties. Using AFTIR, we identified Cynarin in Echinacea purpurea by its selective binding to chip immobilized CD28, a receptor of T-cells, which is instrumental to immune functioning. The results of surface plasma resonance show that binding between immobilized CD28 and Cynarin is stronger than the binding between CD28 and CD80, a co-stimulated receptor of antigen presenting cells. Cynarin's function was verified by its ability to downregulate CD28-dependent interleukin-2 (IL-2) expression in a T-cell culture line. AFTIR offers promise as an efficient screening method for herbal medicines.

journal_name

J Med Chem

authors

Dong GC,Chuang PH,Forrest MD,Lin YC,Chen HM

doi

10.1021/jm0509039

keywords:

subject

Has Abstract

pub_date

2006-03-23 00:00:00

pages

1845-54

issue

6

eissn

0022-2623

issn

1520-4804

journal_volume

49

pub_type

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