CB-1158 analog 1345810-21-0_Others_Signaling Pathways_Products

CB-1158 analog (CB-1158, INCB01158 or Numidargistat analog) is a potent and orally bioavailable small-molecule inhibitor of the arginase with potential immunomodulating activities. Myeloid cells are an abundant leukocyte in many types of tumors and contribute to immune evasion. Expression of the enzyme arginase 1 (Arg1) is a defining feature of immunosuppressive myeloid cells and leads to depletion of L-arginine, a nutrient required for T cell and natural killer (NK) cell proliferation. CB-1158 has shown high anti-cancer activity in renal cell cancer, breast cancer, non-small cell lung cancer, acute myeloid leukemia, and other tumor types where arginase-secreting MDSCs are known to play an immunosuppressive role. Arginase blockade by CB-1158 may be an effective therapy in multiple types of cancer, also the combination of CB-1158 with standard-of-care chemotherapy or other immunotherapies that target T-cell activation, such as CTLA-4 and PD-1 antibodies may yield improved clinical responses. CB-1158 is currently in a Phase I clinical trial as a single agent and in combination with immune checkpoint therapy in patients with advanced/metastatic solid tumors.

Physicochemical Properties

Molecular Formula

C18H27BCL2N2O4

Molecular Weight

417.13

Exact Mass

416.144

CAS #

1345810-21-0

Related CAS #

2095732-06-0 ;1345810-21-0;

PubChem CID

66832679

Appearance

Typically exists as solid at room temperature

Hydrogen Bond Donor Count

Hydrogen Bond Acceptor Count

Rotatable Bond Count

Heavy Atom Count

Complexity

480

Defined Atom Stereocenter Count

InChi Key

ISYBHIALKUAHGV-UHFFFAOYSA-N

InChi Code

InChI=1S/C18H27BCl2N2O4/c20-15-4-3-13(16(21)11-15)12-23-9-5-14(6-10-23)18(22,17(24)25)7-1-2-8-19(26)27/h3-4,11,14,26-27H,1-2,5-10,12,22H2,(H,24,25)

Chemical Name

2-amino-6-borono-2-(1-(2,4-dichlorobenzyl)piperidin-4-yl)hexanoic acid

Synonyms

INCB01158,CB-1158,INCB 01158,CB 1158,INCB-01158; CB1158

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)

Biological Activity

ln Vitro

In vitro activity: CB-1158 (previously known as INCB01158) is a potent and orally-bioavailable small-molecule inhibitor of the arginase. Myeloid cells are an abundant leukocyte in many types of tumors and contribute to immune evasion. Expression of the enzyme arginase 1 (Arg1) is a defining feature of immunosuppressive myeloid cells and leads to depletion of L-arginine, a nutrient required for T cell and natural killer (NK) cell proliferation. CB-1158 has shown high anti-cancer activity in renal cell cancer, breast cancer, non-small cell lung cancer, acute myeloid leukemia, and other tumor types where arginase-secreting MDSCs are known to play an immunosuppressive role. Arginase blockade by CB-1158 may be an effective therapy in multiple types of cancer, also the combination of CB-1158 with standard-of-care chemotherapy or other immunotherapies that target T-cell activation, such as CTLA-4 and PD-1 antibodies may yield improved clinical responses.

Kinase Assay: Recombinant human arginase 2 (Arg2) comprising amino acids 23–254 was purchased from US Biological (Salem, MA). Activity assays using 2 nM Arg1 or 4 nM Arg2 were performed in reaction buffer (137 mM NaCl, 2.7 mM KCl, 8 mM Na2HPO4, 2 mM KH2PO4, 0.005% Triton X-100, 0.5 mM DTT, 0.5 mM MgCl2, 0.1 mM CaCl2, and 160 μM or 20 mM L-arginine, pH 7.4) at 37 °C for 30 min with a dose-titration of CB-1158. Activity was determined by a spectrophotometric assay using the QuantiChrom Urea Assay Kit (BioAssay Systems, Hayward, CA) or by quantification of the generation of 13C(5)-L-ornithine from 13C(6)-L-arginine using a SCIEX API4000 mass spectrometer. Urea produced or 13C(5)-L-ornithine peak areas were plotted and fitted to a four-parameter equation using GraphPad Prism software (San Diego, CA) to determine IC50 values.

Cell Assay: T cells or NK cells were purified from healthy donor human blood or from murine splenocytes using a negative selection kit for the appropriate cell type and species from Stemcell Technologies. Isolated T cells or NK cells were loaded with carboxyfluorescein succinimidyl ester (CFSE, Thermo Fisher) and stimulated for 72–96 h in complete growth medium containing a minimum of either 50 μM L-arginine (NK cells) or 100 μM L-arginine (T cells). For T cell stimulation, a solution of 10 μg/mL anti-CD3 (human clones UCHT1 or OKT3; murine clone 145-2C11) was used to coat the wells of a 96-well plate and then T cells were stimulated on immobilized anti-CD3 in the presence of 2 μg/mL soluble anti-CD28 (human clone CD28.2; murine clone 37.51). NK cells were stimulated with recombinant IL-2. Proliferation was quantified by analyzing CFSE dilution by flow cytometry.

ln Vivo

Female wild-type C57BL/6 and Balb/c mice (5–6 weeks old) were purchased from Charles River Laboratories (Hollister, CA). Severe combined immune deficient (SCID, B6.CB17-PrkdcSCID/SzJ) and Pmel-1 TCR transgenic (B6.Cg-Thy1a/Cy Tg(TcraTcrb)8Rest/J) mice (5–6 weeks old) were purchased from The Jackson Laboratory (Bar Harbor, ME). All mice were housed and treated in accordance with Institutional Animal Care and Use Committee guidelines. For the 4T1 tumor model, 105 cells were injected orthotopically into the mammary fat pad; for all other tumor models, 106 cells were injected subcutaneously (s.c.) in the right flank. For all studies, CB-1158 was administered by oral gavage twice per day at 100 mg/kg starting on study day 1 (1 day after tumor implant). Control groups received vehicle (water) twice daily by gavage. Tumor volume measured by digital caliper (length × width × width/2) and body weight were recorded three times per week. Animals were euthanized when tumors necrotized or volumes reached 2000 mm3. For the CT26 model, anti-PD-L1 antibody (5 mg/kg, clone 10F.9G2, BioXCell, West Lebanon, NH) was injected intraperitoneally (i.p.) on days 5, 7, 9, 11, 13, and 15. For the 4T1 model, anti-CTLA-4 antibody (5 mg/kg, clone 9H10, BioXCell) was injected i.p. on days 2, 5, and 8; anti-PD-1 antibody (5 mg/kg, clone RMP1–14, BioXCell) was injected i.p. on days 3, 6, and 9. 4T1 tumors were harvested on study day 25 into Fekete’s solution and tumor nodules were enumerated visually. Gemcitabine was dosed 50 mg/kg i.p. on days 10 and 16 for the CT26 model, 60 mg/kg i.p. on days 6 and 10 for the LLC model, or 30 mg/kg i.p. on day 5 for the 4T1 model. With these regimens, gemcitabine modestly reduces tumor growth and spares most tumor-infiltrating immune cells, allowing for the evaluation of combination activity with CB-1158. For CD8+ cell depletion, mice were injected i.p. with anti-CD8 antibody (25 mg/kg, clone 2.43, BioXCell) on days −1, 0, + 5, and +10. For NK cell depletion, mice were injected i.p. with anti-NK1.1 antibody (25 mg/kg, clone PK136, BioXCell) in the LLC and B16 models or with anti-Asialo GM1 sera (20 μL) in the CT26 model, per the same schedule as anti-CD8.

Animal Protocol

CB-1158 was administered by oral gavage twice per day at 100 mg/kg starting on study day 1

Female wild-type C57BL/6 and Balb/c mice (5–6 weeks old)

References

J Immunother Cancer.2017 Dec 19;5(1):101;WO 2017075363 A1.

Solubility Data

Solubility (In Vitro)

DMSO: > 10mM

Water: N/A

Ethanol:N/A

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)

Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders

Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

(Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.3973 mL	11.9867 mL	23.9733 mL
	5 mM	0.4795 mL	2.3973 mL	4.7947 mL
	10 mM	0.2397 mL	1.1987 mL	2.3973 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.

PeptideDB

CB-1158 analog 1345810-21-0

CAS No.: 1345810-21-0

Physicochemical Properties

Biological Activity

Solubility Data