Novel synthetic inhibitors of selectin-mediated cell adhesion: synthesis of 1,6-bis[3-(3-carboxymethylphenyl)-4-(2-alpha-D- mannopyranosyloxy)phenyl]hexane (TBC1269).
Reports of a high-affinity ligand for E-selectin, sialyl di-Lewis(x) (sLe(x)Le(x), 1), motivated us to incorporate modifications to previously reported biphenyl-based inhibitors that would provide additional interactions with the protein. These compounds were assayed for the ability to inhibit the binding of sialyl Lewis(x) (sLe(x), 2) bearing HL-60 cells to E-, P-, and L-selectin fusion proteins. We report that dimeric or trimeric compounds containing multiple components of simple nonoligosaccharide selectin antagonists inhibit sLe(x)-dependent binding with significantly enhanced potency over the monomeric compound. The enhanced potency is consistent with additional binding interactions within a single selectin lectin domain; however, multivalent interaction with multiple lectin domains as a possible alternative cannot be ruled out. Compound 15e (TBC1269) showed optimal in vitro activity from this class of antagonists and is currently under development for use in the treatment of asthma.
Kogan
T P
TP
Department of Chemistry & Biophysics, Texas Biotechnology Corporation, Houston 77030, USA. tkogan@tbc.com
Dupré
B
B
Bui
H
H
McAbee
K L
KL
Kassir
J M
JM
Scott
I L
IL
Hu
X
X
Vanderslice
P
P
Beck
P J
PJ
Dixon
R A
RA
D018927:Anti-Asthmatic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D001249:Asthma / Q000188:drug therapy; D001713:Biphenyl Compounds / Q000138:chemical synthesis* / Q000494:pharmacology; D002448:Cell Adhesion / Q000187:drug effects*; D018922:HL-60 Cells / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D008358:Mannose / Q000031:analogs & derivatives; D008362:Mannosides / Q000138:chemical synthesis* / Q000494:pharmacology; D008958:Models, Molecular; D019087:Selectins / Q000378:metabolism*
D018927:Anti-Asthmatic Agents; D001713:Biphenyl Compounds; D008362:Mannosides; D019087:Selectins; C108700:bimosiamose disodium; D008358:Mannose