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MF-766

Alias: MF766; MF 766; MF-766
Cat No.:V25488 Purity: ≥98%
MF-766 is a potent, selective and orally bioactive EP4 antagonist (inhibitor) with Ki of 0.23 nM.
MF-766
MF-766 Chemical Structure CAS No.: 1050656-06-8
Product category: New1
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
MF-766 is a potent, selective and orally bioactive EP4 antagonist (inhibitor) with Ki of 0.23 nM. MF-766 behaves as a full antagonist in functional assays with IC50 of 1.4 nM (changes to 1.8 nM in the presence of 10% HS). MF-766 may be utilized in cancer and inflammatory disease study.
MF-766 (CAS 1050656-06-8) is a highly potent, selective, and orally active EP4 (prostaglandin E2 receptor 4) antagonist. It belongs to the N-benzyl indole carboxylic acid class and represents a second-generation EP4 antagonist specifically engineered to replace the hydrolytically unstable acylsulfonamide moiety present in first-generation compounds. MF-766 has a binding Ki of 0.23 nM for the EP4 receptor. It behaves as a full antagonist with an IC₅₀ of 1.4 nM (shifted to 1.8 nM in the presence of 10% human serum) in functional assays. MF-766 displays >7,000-fold selectivity for EP4 over all other prostanoid receptor subtypes (EP1, EP2, EP3, DP1, CRTH2/DP2, IP, TP, FP) with Ki values >6,000 nM. The compound has a molecular weight of 478.46 and is soluble in DMSO. It has value for research in cancer and inflammatory diseases. MF-766 is a research compound without regulatory approval for clinical use.
Biological Activity I Assay Protocols (From Reference)
Targets
MF-766 targets the prostaglandin E2 receptor subtype 4 (EP4), a G protein-coupled receptor that mediates the effects of prostaglandin E2 (PGE2). The compound binds to EP4 with a Ki of 0.23 nM. In functional assays, MF-766 behaves as a full antagonist with an IC₅₀ of 1.4 nM (shifted to 1.8 nM in the presence of 10% human serum). MF-766 displays >7,000-fold selectivity for EP4 over all other prostanoid receptor subtypes (EP1, EP2, EP3, DP1, CRTH2/DP2, IP, TP, FP) with Ki values >6,000 nM. By blocking EP4, MF-766 reverses PGE2-induced immunosuppression and inflammation. The EP4 receptor is involved in various physiological and pathological processes, including inflammation, pain, cancer, and immune regulation. MF-766's high potency and selectivity make it a valuable tool for studying the role of EP4 signaling in health and disease.
ln Vitro
In human NK cells, MF-766 (0.01-10 μM; 1 hour off, stimulated with 50 ng/mL IL-2; with and 0.33 μM PGE2; 18 hours) recovers PGE2 and then IFN-γ without inhibition. MF-766 does not influence the activity of NK cells [2].
In vitro, MF-766 demonstrates potent antagonism of EP4-mediated responses. The compound binds to EP4 with a Ki of 0.23 nM and behaves as a full antagonist with an IC₅₀ of 1.4 nM (shifted to 1.8 nM in the presence of 10% human serum) in functional assays. MF-766 displays >7,000-fold selectivity for EP4 over all other prostanoid receptor subtypes. In cellular assays, MF-766 (0.01-10 μM) reverses PGE2-induced suppression of IFN-γ secretion in human NK cells without affecting cell viability. The compound's ability to reverse PGE2-induced immunosuppression suggests potential applications in cancer immunotherapy. MF-766's high potency and selectivity make it a valuable tool for studying the role of EP4 in various cellular and physiological processes. The compound's effects on cell viability, proliferation, and immune function can be assessed in various cell types.
ln Vivo
In the CT26 model, MF-766 (medial gavage; 30 mg/kg; once daily; tumor day 21) showed 49% tumor inhibition. EMT6 and 4T1 tumor models, on the other hand, did not exhibit any appreciable differences [2 MF-766 (oral gavage; 30 mg/kg coupled with anti-PD-1 mDX400; once daily; 21 days; q4dx8) in several preclinical models Shows strong anti-tumor efficacy. Tumor inhibition rates were 89%, 66%, and 40%, respectively, in 4T1 tumor models, EMT6 tumors, and CT26 tumors [2].
In vivo, MF-766 demonstrates efficacy in various animal models of cancer and inflammation. The compound is orally active and has good pharmacokinetic properties. MF-766 exhibits unprecedented in vivo potency in the rat AIA (adjuvant-induced arthritis) model. In the CT26 tumor model, MF-766 (oral gavage; 30 mg/kg; once daily; 21 days) exhibits 49% tumor growth inhibition. In combination with anti-PD-1 antibody, the tumor growth inhibition rate reaches 89%, 66%, and 40% in CT26, EMT6, and 4T1 models, respectively. These results suggest that EP4 antagonism can enhance the efficacy of immune checkpoint blockade. The compound's oral bioavailability and in vivo efficacy make it a valuable tool for studying the role of EP4 signaling in cancer and inflammation and for validating EP4 as a therapeutic target.
Enzyme Assay
In vitro receptor binding assays for MF-766 employ radioligand displacement techniques using membrane preparations from cells expressing the EP4 receptor or other prostanoid receptors. The assay involves incubating MF-766 at varying concentrations with the membrane preparation and a fixed concentration of a radiolabeled prostanoid receptor ligand, such as [³H]-PGE2. Following incubation, bound and free radioligand are separated by rapid filtration through glass fiber filters, and the radioactivity retained on the filters is measured by scintillation counting. Non-specific binding is determined in the presence of a high concentration of unlabeled PGE2 or a prostanoid receptor antagonist. Binding affinity (Ki) values are calculated from competition curves using nonlinear regression analysis. For selectivity profiling, MF-766 is tested against EP1, EP2, EP3, DP1, CRTH2/DP2, IP, TP, and FP receptors using similar methodologies. For functional assays, cells expressing EP4 are stimulated with PGE2 in the presence or absence of MF-766, and downstream signaling such as cAMP accumulation is measured.
Cell Assay
In vitro cellular assays for MF-766 typically employ cell lines expressing the EP4 receptor or primary cells that respond to PGE2. For studies investigating immune modulation, human NK cells are cultured in appropriate media and treated with MF-766 (0.01-10 μM) in the presence or absence of PGE2. IFN-γ secretion is measured by ELISA or flow cytometry. Cell viability is assessed using standard assays such as MTT or resazurin reduction. For studies investigating the role of EP4 in cancer, cancer cell lines are treated with MF-766 alone or in combination with other agents, and cell proliferation, apoptosis, and signaling pathways are assessed. The compound's effects on cAMP accumulation can be measured using ELISA or FRET-based assays. The compound's selectivity for EP4 over other prostanoid receptors can be confirmed using cells expressing each receptor subtype.
Animal Protocol
Animal/Disease Models: Female C57BL/6 J strain mice were subcutaneously (sc) (sc) injected with CT26, EMT6 or 4T1 cells [2]
Doses: 30 mg/kg combined with anti-PD-1 mDX400: po (oral gavage); 10 mg/kg or 30 mg/kg kg in combination with anti-PD-1 mDX400; one time/day; day 21; q4dx8
Experimental Results: Antitumor activity was improved with PD-1 blockade in multiple syngeneic models.
In vivo animal experiments for MF-766 employ various models of cancer and inflammation. For cancer studies, immunocompetent mice bearing syngeneic tumors (CT26, EMT6, 4T1) are treated with MF-766 (oral gavage; 30 mg/kg; once daily) alone or in combination with anti-PD-1 antibody. Tumor growth is measured using calipers, and tumor growth inhibition is calculated. For inflammation studies, the rat AIA (adjuvant-induced arthritis) model is used. Paw swelling and inflammatory markers are assessed. For pharmacokinetic studies, animals are administered MF-766 orally, and plasma concentrations are measured over time. Dosing regimens vary depending on the experimental objectives, with once-daily oral administration being common. The compound's oral bioavailability and in vivo efficacy have been demonstrated in these models.
ADME/Pharmacokinetics
The pharmacokinetic properties of MF-766 are characteristic of an orally active small molecule. The compound is orally bioavailable and has good pharmacokinetic properties. MF-766 has a molecular weight of 478.46 and is soluble in DMSO. It exhibits unprecedented in vivo potency in the rat AIA model. The compound's pharmacokinetic profile in terms of absorption, distribution, metabolism, and excretion is consistent with its use as an oral research tool. MF-766 has been shown to be orally active in animal models, with efficacy observed at doses of 30 mg/kg. The compound's half-life and bioavailability have been characterized in preclinical studies. The compound is a second-generation EP4 antagonist engineered to have improved stability compared to first-generation compounds.
Toxicity/Toxicokinetics
The toxicity profile of MF-766 has not been extensively characterized in the literature, as the compound is primarily used as a research tool. In cellular assays, MF-766 (0.01-10 μM) reverses PGE2-induced suppression of IFN-γ secretion in human NK cells without affecting cell viability. In animal studies, MF-766 has been administered at doses of 30 mg/kg orally without reports of significant toxicity. The compound's safety in humans has not been established, as it has not been developed for clinical use. As with any research compound, appropriate safety precautions should be taken when handling MF-766. The compound's potential for off-target effects or drug-drug interactions has not been extensively studied. The compound is intended for research use only and is not approved for human therapeutic use.
References

[1]. Discovery of 4-[1-[([1-[4-(trifluoromethyl)benzyl]-1H-indol-7-yl]carbonyl)amino]cyclopropyl]benzoic acid (MF-766), a highly potent and selective EP4 antagonist for treating inflammatory pain. Bioorg Med Chem Lett.

[2]. Combination of EP 4 antagonist MF-766 and anti-PD-1 promotes anti-tumor efficacy by modulating both.

Additional Infomation
MF-766 is a highly potent, selective, and orally active EP4 antagonist with a Ki of 0.23 nM. It behaves as a full antagonist with an IC₅₀ of 1.4 nM (shifted to 1.8 nM in the presence of 10% human serum) in functional assays. MF-766 displays >7,000-fold selectivity for EP4 over all other prostanoid receptor subtypes. It has a molecular weight of 478.46 and is soluble in DMSO. In vivo, MF-766 (30 mg/kg; oral; once daily; 21 days) exhibits 49% tumor growth inhibition in the CT26 tumor model; in combination with anti-PD-1 antibody, TGI% reaches 89%, 66%, and 40% in CT26, EMT6, and 4T1 models, respectively. MF-766 is a second-generation EP4 antagonist engineered to replace the hydrolytically unstable acylsulfonamide moiety present in first-generation compounds. It is a research compound for cancer and inflammation studies without regulatory approval.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C27H21F3N2O3
Molecular Weight
478.4712
Exact Mass
478.15
CAS #
1050656-06-8
PubChem CID
25003075
Appearance
Off-white to gray solid powder
Density
1.4±0.1 g/cm3
Boiling Point
711.4±60.0 °C at 760 mmHg
Flash Point
384.1±32.9 °C
Vapour Pressure
0.0±2.4 mmHg at 25°C
Index of Refraction
1.628
LogP
5.12
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
6
Rotatable Bond Count
6
Heavy Atom Count
35
Complexity
783
Defined Atom Stereocenter Count
0
InChi Key
BWXAZFCPGFKANL-UHFFFAOYSA-N
InChi Code
InChI=1S/C27H21F3N2O3/c28-27(29,30)21-8-4-17(5-9-21)16-32-15-12-18-2-1-3-22(23(18)32)24(33)31-26(13-14-26)20-10-6-19(7-11-20)25(34)35/h1-12,15H,13-14,16H2,(H,31,33)(H,34,35)
Chemical Name
4-[1-[[1-[[4-(trifluoromethyl)phenyl]methyl]indole-7-carbonyl]amino]cyclopropyl]benzoic acid
Synonyms
MF766; MF 766; MF-766
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO : ~50 mg/mL (~104.50 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (5.23 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.0900 mL 10.4500 mL 20.9000 mL
5 mM 0.4180 mL 2.0900 mL 4.1800 mL
10 mM 0.2090 mL 1.0450 mL 2.0900 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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