Characterization of TRIF selectivity in the AGP class of lipid A mimetics: Role of secondary lipid chains
摘要:
TLR4 agonists that favor TRIF-dependent signaling and the induction of type 1 interferons may have potential as vaccine adjuvants with reduced toxicity. CRX-547 (4), a member of the aminoalkyl glucosaminide 4-phosphate (AGP) class of lipid A mimetics possessing three (R)-3-decanoyloxytetradecanoyl groups and D-relative configuration in the aglycon, selectively reduces MyD88-dependent signaling resulting in TRIF-selective signaling, whereas the corresponding secondary ether lipid 6a containing (R)-3-decyloxytetradecanoyl groups does not. In order to determine which secondary acyl groups are important for the reduction in MyD88-dependent signaling activity of 4, the six possible ester/ether hybrid derivatives of 4 and 6a were synthesized and evaluated for their ability to induce NF-kappa B in a HEK293 cell reporter assay. An (R)-3-decanoyloxytetradecanoyl group on the 3-position of the D-glucosamine unit was found to be indispensable for maintaining low NF-kappa B activity irrespective of the substitutions (decyl or decanoyl) on the other two secondary positions. These results suggest that the carbonyl group of the 3-secondary lipid chain may impede homodimerization and/or conformational changes in the TLR4-MD2 complex necessary for MyD88 binding and pro-inflammatory cytokine induction. (C) 2014 Elsevier Ltd. All rights reserved.
The ‘Ethereal’ nature of TLR4 agonism and antagonism in the AGP class of lipid A mimetics
摘要:
To overcome the chemical and metabolic instability of the secondary fatty acyl residues in the AGP class of lipid A mimetics, the secondary ether lipid analogs of the potent TLR4 agonist CRX-527 (2) and TLR4 antagonist CRX-526 (3) were synthesized and evaluated along with their ester counterparts for agonist/antagonist activity in both in vitro and in vivo models. Like CRX-527, the secondary ether lipid 4 showed potent agonist activity in both murine and human models. Ether lipid 5, on the other hand, showed potent TLR4 antagonist activity similar to CRX-526 in human cell assays, but did not display any antagonist activity in murine models and, in fact, was weakly agonistic. Glycolipids 2, 4, and 5 were synthesized via a new highly convergent method utilizing a common advanced intermediate strategy. A new method for preparing (R)-3-alkyloxytetradecanoic acids, a key component of ether lipids 4 and 5, is also described. (C) 2008 Elsevier Ltd. All rights reserved.
[EN] TLR4 COMPOUNDS OR PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF, CORRESPONDING PHARMACEUTICAL COMPOSITIONS OR FORMULATIONS, METHODS OF PREPARATION, TREATMENT OR USES<br/>[FR] COMPOSÉS TLR4 OU SELS PHARMACEUTIQUEMENT ACCEPTABLES DE CEUX-CI, COMPOSITIONS OU FORMULATIONS PHARMACEUTIQUES CORRESPONDANTES, PROCÉDÉS DE PRÉPARATION, TRAITEMENT OU UTILISATIONS
申请人:GLAXOSMITHKLINE IP DEV LTD
公开号:WO2020007760A1
公开(公告)日:2020-01-09
The present invention relates to novel pharmaceutically acceptable salts of TLR4 agonist compounds and forms thereof, corresponding pharmaceutical compositions or formulations, processes or methods of compound preparation and uses or treatment methods for cancers, which includes associated cancer immunotherapies (i.e., also known as immuno-oncology).
作者:Juhienah K. Khalaf、Laura S. Bess、Lois M. Walsh、Janine M. Ward、Craig L. Johnson、Mark T. Livesay、Konner J. Jackson、Jay T. Evans、Kendal T. Ryter、Hélène G. Bazin-Lee
DOI:10.1021/acs.jmedchem.3c00724
日期:2023.10.26
synthetic toll-like receptor 4 (TLR4) agonists are carbohydrate-based lipid-A mimetics containing several fatty acyl chains, including a labile 3-O-acyl chain linked to the C-3 position of the non-reducing sugar known to undergo cleavage impacting stability and resulting in loss of activity. To overcome this inherent instability, we rationally designed a new class of chemically more stable synthetic TLR4
Certain aminoalkyl glucosaminide phosphate compounds and their use
申请人:Johnson A. David
公开号:US20050227943A1
公开(公告)日:2005-10-13
Compounds that are adjuvants and immunoeffectors are described and claimed. The compounds augment antibody production in immunized animals as well as stimulate cytokine production and activate macrophages. Compositions and methods for using the compounds as adjuvants and immunoeffectors are also disclosed.