产品描述

Resiquimod is an imidazoquinoline amine and Toll-like receptor (TLR) agonist with potential immune response modifying activity. Resiquimod exerts its effect through the TLR signaling pathway by binding to and activating TLR7 and 8 mainly on dendritic cells, macrophages, and B-lymphocytes. This induces the nuclear translocation of the transcription activator NF-kB as well as activation of other transcription factors. This may lead to an increase in mRNA levels and subsequent production of cytokines, especially interferon-alpha (INF-a) and other cytokines, thereby enhancing T-helper 1 (Th1) immune responses. In addition, topical application of resiquimod appears to activate Langerhans' cells, leading to an enhanced activation of T-lymphocytes.

靶点活性

TLR7,

TLR8,

应用领域

Cancer

体外活性

Resiquimod induces the differentiation of myeloid-derived suppressor cells into dendritic cells and macrophages and may improve cancer immunotherapy by reducing immunosuppressive MDSCs. Resiquimod activates immune cells and induces proliferation of wild-type splenocytes via the Toll-like receptor 7 (TLR7)-MyD88-dependent signaling pathway [1]. Resiquimod also modulates dendritic cells to augment HIV-1- and cytomegalovirus-specific T cell responses [2].

体内活性

In wild-type mice, Resiquimod (50 nmol, i.p.) promotes increased serum concentrations of TNF-α, IFN-α, and IL-12, while neither MyD88-deficient mice nor TLR7-deficient mice show an increase in these cytokines [1]. In a murine model of allergic asthma, Resiquimod (i.n., 20 μg/mouse) reduces allergen-induced airway reactivity and inflammation via the reduction in Nrf2 signaling.

激酶实验

For luciferase assay, FG-9307 cells are transfected with the firefly NF-κB-specific luciferase reporter vector pNFκB-Met-Luc2. Transfection efficiency is monitored by co-transfection with the pSEAP2 control vector, which constitutively expresses the human secreted enhanced alkaline phosphatase (SEAP). Then the cells are treated with Resiquimod (R848, 1 µg/mL), CQ (10 µM), CQ plus R848 or PBS and incubated at 22°C for 24 h. The culture medium of the transfectants is then analyzed for luciferase activity and SEAP activity using Luciferase Assay Kit and the Great EscAPe™ SEAP Chemiluminescence Detection Kit, respectively. The assay is performed three times.

细胞实验

Resiquimod is dissolved in DMSO. For inhibition of lysosomal acidification, cells are incubated with 10 µM CQ for 1 h before Resiquimod (R848) treatment. After treatment, 20 µL of 5 mg/mL MTT is added to the plate. The plate is incubated at 22°C for 4 h, and 200 µL dimethyl sulfoxide is added to the plate to dissolve the reduced formazan. The plate is then read at 490 nm with a microplate reader. To determine the effect of Myd88 inhibition on R848-induced cell proliferation, the Myd88 inhibitor Pepinh-MYD and the control peptide Pepinh-Control are added to PBL at the concentration of 50 µM, and the plate is incubated at 22°C for 6 h. After incubation, the cells are treated with R848 and subjected to MTT assay as above. To determine the effect of NF-κB inactivation on R848-induced cell proliferation, BAY-11-7082, an irreversible inhibitor of IκB-α phosphorylation, is added to the cells at the concentration of 1 µM, and the plate is incubated at 22°C for 1 h. After incubation, the cells are treated with R848 and subjected to MTT assay as earlier. All experiments are performed three times.

动物实验

Animal Models: Wild-type mice, TLR7-deficient mice, and MyD88-deficient mice Formulation: saline Dosages: 50 nmol Administration: i.p.

动物模型：Wild-type mice, TLR7-deficient mice, and MyD88-deficient mice

分子量

314.38

分子式

C17H22N4O2

CAS

144875-48-9

溶解度

DMSO: 59 mg/mL (187.7 mM)

Ethanol: 20 mg/mL (63.6 mM)

Water: <1 mg/mL

（ < 1 mg/ml refers to the product slightly soluble or insoluble )

储存条件

3 years  -20℃  powder

2 years  -80℃  In solvent

备注

For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.