title: Aryl O- and S-galactosides and lactosides as specific inhibitors of human galectins-1 and -3: role of electrostatic potential at O-3.
abstract: Phase transfer catalyzed reaction was used for the high yielding synthesis of aryl 1-thio-beta-d-galacto- and lacto-pyranosides carrying a panel of substituents on the phenyl groups. Best galectin-1 inhibitors were simple p-nitrophenyl thiogalactoside 5a for the monosaccharide and o-nitrophenyl thiolactoside 6f or napthylsulfonyl lactoside 8c, both being 20 times better relative to natural ligands. Relative inhibitory properties as low as 2500 and 40 microM were observed, respectively. The electronic effects of the lactoside aglycons directly influenced the electrostatic potential at O-3, which was associated with the inhibitory potencies against galectin-1.
authors.affiliation: Departement of Chemistry, Université du Québec à Montréal, PO Box 8888, Succ. Centre-Ville Montreal, Québec, Canada H3C 3P8.
authors.forename: Denis
authors.initials: D
authors.lastname: Giguère
authors.forename: Sachiko
authors.initials: S
authors.lastname: Sato
authors.forename: Christian
authors.initials: C
authors.lastname: St-Pierre
authors.forename: Suzanne
authors.initials: S
authors.lastname: Sirois
authors.forename: René
authors.initials: R
authors.lastname: Roy
mesh_terms: D018360:Crystallography, X-Ray; D005697:Galactosides / Q000494:pharmacology*; D037483:Galectin 1 / Q000037:antagonists & inhibitors*; D037502:Galectin 3 / Q000037:antagonists & inhibitors*; D006027:Glycosides / Q000494:pharmacology*; D006801:Humans; D015394:Molecular Structure; D055672:Static Electricity; D013329:Structure-Activity Relationship
chemical_list: D005697:Galactosides; D037483:Galectin 1; D037502:Galectin 3; D006027:Glycosides; C445499:LGALS1 protein, human; C008245:lactosides