examined for antimicrobial activity against Gram-positive, Gram-negative bacteria and fungi. The study of their in vitro antimicrobial activity confirms the significant activity of some monoglucosyl diacylglycerol analogues and establishes for the glucose series that the 1,2-disubstitution and the octanoyl chain are the proper structural features for the maximum activity.
Monoglucosyl and monogalactosyl diglycerides (MGDGs) with medium-long length acyl chains, identified as active components in Euphorbiaccae, were synthesized. They were examined for antimicrobial activity against Gram-positive, Gram-negative bacteria and fungi. MGDGs with two octanoyl groups at both 1- and 2-positions showed the most potent activity. The stereoselectivity of pancreatic lipase was investigated in vitro where the preference for the 1 position in MGDGs is strictly related to the length of the acyl chains. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis and anti-herpes simplex viral activity of monoglycosyl diglycerides
Based on the discovery of antiviral beta-galactosyl diglycerides from Clinacanthus nutans leaves, 19 monoglycosyl diglycerides were synthesized and examined for inhibitory effect on herpes simplex virus types I and 2 (HSV-1, HSV-2). A study of the structure-activity relationships of the synthetic monoglycosyl diglycerides indicated that the fatty acyl moieties were critical for inhibitory action with higher activity displayed as the acyl groups became more olefinic in character. The sugar moiety was also important for anti-HSV action; however, the type of sugar (glucose or galactose) did not affect activity. The stereochemistry at C-2 of the glycerol backbone displayed no significant effect on anti-HSV activity. Among the compounds synthesized, 1,2-O-dilinolenoyl-3-O-beta-D-glucopyranosyl-sn-glycerol showed the highest inhibitory activity against HSV-1 and HSV-2 with IC50 values of 12.5 +/- 0.5 and 18.5 +/- 1.5 mug/ml, respectively. (C) 2003 Elsevier Ltd. All rights reserved.
Chemical Synthesis of Marine-Derived Sulfoglycolipids, a New Class of Molecular Adjuvants
作者:Emiliano Manzo、Laura Fioretto、Dario Pagano、Genoveffa Nuzzo、Carmela Gallo、Raffaele De Palma、Angelo Fontana
DOI:10.3390/md15090288
日期:——
here named Sulfavant A (1), which shows promising properties as a new molecular adjuvant in in vitro and in vivo tests. In the present manuscript, we provide full details about a synthetic strategy for the preparation of 1, including a discussion of chemical determinants of the activity and the major technical hurdles we faced during the study. Synthesis of Sulfavant A (1) is achieved by a versatile