Synthesis and immunostimulatory activity of sugar-conjugated TLR7 ligands
作者:Akihito Baba、Masahiro Wakao、Hiroyuki Shinchi、Michael Chan、Tomoko Hayashi、Shiyin Yao、Howard B. Cottam、Dennis A. Carson、Yasuo Suda
DOI:10.1016/j.bmcl.2019.126840
日期:2020.2
Toll-like receptors (TLRs) are a type of pattern recognition receptors (PRRs), which are activated by recognizing pathogen-associated molecular patterns (PAMPs). The activation of TLRs initiates innate immune responses and subsequently leads to adaptive immune responses. TLR agonists are effective immuomodulators in vaccine adjuvants for infectious diseases and cancer immunotherapy. In exploring hydrophilic small molecules of TLR7 ligands using the cell-targeted property of a vaccine adjuvant, we conjugated 1V209, a small TLR7 ligand molecule, with various low or middle molecular weight sugar molecules that work as carriers. The sugar-conjugated 1V209 derivatives showed increased water solubility and higher immunostimulatory activity in both mouse and human cells compared to unmodified 1V209. The improved immunostimulatory potency of sugar-conjugates was attenuated by an inhibitor of endocytic process, cytochalasin D, suggesting that conjugation of sugar moieties may enhance the uptake of TLR7 ligand into the endosomal compartment. Collectively our results support that sugar-conjugated TLR7 ligands are applicable to novel drugs for cancer and vaccine therapy.
[EN] NEW CONJUGATES FOR THERAPEUTIC PURPOSES AND/OR AS DIAGNOSIS AND/OR IMAGING AGENTS AND METHOD FOR PREPARING THE SAME<br/>[FR] NOUVEAUX CONJUGUES, UTILISABLES A DES FINS THERAPEUTIQUES, ET/OU A TITRE D'AGENT DE DIAGNOSTIC ET/OU D'IMAGERIE ET LEUR PROCEDE DE PREPARATION
申请人:INST NAT SANTE RECH MED
公开号:WO2008074960A2
公开(公告)日:2008-06-26
[EN] The invention relates to a method for preparing a conjugate of the general formula (I) or a derivative thereof, in which : P is a physiologically acceptable chemical or biological substrate selected from proteins, polysaccharides, liposome-type vectors or nano- and micro-particles or biocompatible polymers; and Q is a physiologically acceptable chemical or biological entity different from P and of interest in the field of therapy, diagnosis and/or imaging and selected from targeting ligands, markers, marker-chelating agents and/or marker-chelating agents-marker pairs. The invention also relates to the use of such derivatives in the medical field and essentially for diagnosis and/or imaging purposes. [FR] La présente invention concerne un procédé utile pour la préparation d'un conjugué de formule générale (I) ou l'un de ses dérivés: Formule (I) dans laquelle: -P représente un substrat, chimique ou biologique, physiologiquement acceptable choisi parmi les protéines, les polysaccharides, les vecteurs de type liposome, ou nano-et microparticules ou encore les polymères biocompatibles, et -Q représente une entité, chimique ou biologique, physiologiquement acceptable différente de P et d intérêt dans le domaine thérapeutique, du diagnostic et/ou de l'imagerie choisi parmi des ligands de ciblage, des marqueurs, des chélatants de marqueur(s) et/ou des couples de chélatant de marqueur(s) -marqueur, Elle vise en outre l'utilisation de tels dérivés dans le domaine médical et notamment à des fins de diagnostic et/ou d'imagerie.