Open AccessStructure/activity relationship of leukotriene B 4 and its structural analogues in chemotactic, lysosomal‐enzyme release and receptor‐binding assays
Author(s) -
SOYOMBO Olukayode,
SPUR Bernd W.,
SOH Cecilia,
LEE Tak H.
Publication year - 1993
Publication title -
european journal of biochemistry
Language(s) - English
Resource type - Journals
eISSN - 1432-1033
pISSN - 0014-2956
DOI - 10.1111/j.1432-1033.1993.tb18351.x
Subject(s) - leukotriene b4 , chemotaxis , receptor , stereochemistry , chemistry , enzyme , epitope , leukotriene , binding site , biochemistry , biology , antibody , inflammation , immunology , asthma
The biological activities of chemically synthesized leukotriene B 4 and eight structural analogues have been studied using chemotaxis, lysosomal‐enzyme release and receptor‐binding assays on human neutrophils. The results show that increasing the number of double bonds between C14 and C20, having triple bonds at C6 or C14, substitution of the primary carboxyl group at C1, changing the geometry of the double bond at C6 from the cis to trans configuration and changing the chirality of the hydroxyl group at C12 from the R to the S configuration result in substantial loss of both biological activity and the capacity to bind to the LTB 4 recognition site in parallel. We suggest that the functional epitopes of 5 S , 12 R ‐dihydroxy‐6, 14‐ cis ‐8, 10‐ trans ‐icosatetraenoic acid (LTB 4 ) are either the same, or reside in the same domain as the binding site for the LTB 4 receptor. Development of LTB 4 antagonists to the high‐affinity LTB 4 receptor, based on the structure of LTB 4 , is unlikely to be successful.