Synthesis and anti-tumor-promoting activity of glycoglycerolipid analogues lacking the glycerol backbone
摘要:
Glycoglycerolipid analogues lacking the glycerol backbone were prepared through a lipase catalyzed transesterification Of beta-D-galactosylethylene glycol. The inhibitory effect of the resultant isomeric hexanoates at the primary alcoholic positions, beta-D-galactosylethylene glycol itself and nonyl beta-D-galactopyranoside, was tested on Epstein-Barr virus early antigen (EBV-EA) activation in Raji cells promoted by the tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA), as a primary screening test for inhibitors of tumor promotion. All the compounds assayed were found to be less active than the reference 2-O-beta-D-galactopyranosylglycerol derivatives, of which they are simplified models, indicating that the anti-tumor-promoting activity is very closely related to the presence of a free hydroxymethylene group on the glycerol-like aglycone moiety. (C) 2003 Elsevier Science Ltd. All rights reserved.
Experimental Measurement of Carbohydrate-Aromatic Stacking in Water by Using a Dangling-Ended DNA Model System
作者:Juan C. Morales、José J. Reina、Irene Díaz、Anna Aviñó、Pedro M. Nieto、Ramón Eritja
DOI:10.1002/chem.200800335
日期:2008.9.8
fundamental importance for a large number of biological processes; carbohydrate-aromaticstacking is a widespread, but poorly understood, structural motif in this recognition. We describe, for the first time, the measurement of carbohydrate-aromatic interactions from their contribution to the stability of a dangling-endedDNAmodelsystem. We observe clear differences in the energetics of the interactions
Glycoglycerolipid analogues lacking the glycerol backbone were prepared through a lipase catalyzed transesterification Of beta-D-galactosylethylene glycol. The inhibitory effect of the resultant isomeric hexanoates at the primary alcoholic positions, beta-D-galactosylethylene glycol itself and nonyl beta-D-galactopyranoside, was tested on Epstein-Barr virus early antigen (EBV-EA) activation in Raji cells promoted by the tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA), as a primary screening test for inhibitors of tumor promotion. All the compounds assayed were found to be less active than the reference 2-O-beta-D-galactopyranosylglycerol derivatives, of which they are simplified models, indicating that the anti-tumor-promoting activity is very closely related to the presence of a free hydroxymethylene group on the glycerol-like aglycone moiety. (C) 2003 Elsevier Science Ltd. All rights reserved.