Functional cholesteryl binding agents: synthesis, characterization, and evaluation of antibody binding to modified phospholipid vesicles
摘要:
A series of functionalized cholesteryl derivatives were synthesized. The various lipophilic protein modification agents were analyzed for their protein binding ability. The binding of human IgG, labeled with 125I, to modified phospholipid vesicles was ascertained. Two agents performed well. These were cholest-5-en-3 beta-yl 5-carboxypentyl ether succinimido ester and cholest-5-en-3 beta-yl 6-carboxyhexyl ether succinimido ester.
Cell-specific ligands comprising conjugates of saccharides and amino acids or peptides are synthesized from amino acids such as ornithine, lysine, peptides such as dilysine, diornithine or oligolysine and selected saccharides having reactive functional groups protected by appropriate blocking groups. Such glycopeptides are useful as tissue specific substances, which when coupled with bioactive materials through metabolizable or hydrolyzable linkages, deliver such bioactive materials to the selected site. In this manner, antiinflammatory drugs such as dexamethasone are linked through a metabolizable or hydrolyzable linkage and on administration to an animal suffering from inflammatory disease carries the drug to the site of inflammation for intracellular release. Other examples include the macrophage ligand N.sup.2 -N.sup.2, N.sup.6 -Bis-[3-(.alpha.-D-mannopyranosylthio)propionyl]-6-lysyl-N.sup.6 -[3-(.alpha.-D-mannopyranosylthio)propionyl]-L-lysine, 5, which when coupled to .beta.-glucocerebrosidase, can deliver the enzyme selectively to kupffer cells. This is useful in the enzyme replacement therapy of Gaucher's disease.
Cell-specific ligands for selective drug delivery to tissues and organs
作者:Mitree M. Ponpipom、Robert L. Bugianesi、James C. Robbins、T. W. Doebber、T. Y. Shen
DOI:10.1021/jm00144a004
日期:1981.12
Various numbers of D-mannose residues have been attached via spacer arms to lysine, dilysine, and oligolysine backbones. These D-mannosyl peptide analogues were found to be potent competitive inhibitors of the uptake of 125I-labeled D-mannose-bovine serum albumin conjugate by rat alveolar macrophages. The inhibitory potency of these synthetic ligands increased with increasing number of carbohydrate moieties. The chirality of the peptide backbone did not appear to play a major role in binding, whereas variations of the length and linkage of the spacer arm notably affected the inhibitory activities. The saccharide specificity of the macrophage receptor was demonstrated by the inactivity of the corresponding D-galactosyl peptide analogues. The L-fucosyl peptide derivative was only weakly active. The trimannosyldilysine ligand (KI = 3.9 microM) and its analogues are potentially useful in selective delivery of therapeutic agents to macrophages.
Functional cholesteryl binding agents: synthesis, characterization, and evaluation of antibody binding to modified phospholipid vesicles
作者:Timothy R. Carroll、Alan Davison、Alun G. Jones
DOI:10.1021/jm00160a004
日期:1986.10
A series of functionalized cholesteryl derivatives were synthesized. The various lipophilic protein modification agents were analyzed for their protein binding ability. The binding of human IgG, labeled with 125I, to modified phospholipid vesicles was ascertained. Two agents performed well. These were cholest-5-en-3 beta-yl 5-carboxypentyl ether succinimido ester and cholest-5-en-3 beta-yl 6-carboxyhexyl ether succinimido ester.
Self-organizing behaviour of glycosteroidal bolaphiles: insights into lipidic microsegregation
作者:R. Xu、F. Ali-Rachedi、N. M. Xavier、S. Chambert、F. Ferkous、Y. Queneau、S. J. Cowling、E. J. Davis、J. W. Goodby
DOI:10.1039/c4ob02191f
日期:——
The synthesis of glycosteroidal bolaphile biomimics are described along with the liquid-crystalline behaviours as a function of increasing aliphatic composition.