Ixazomib Citrate (MLN9708)

For research use only.

Catalog No.S2181

25 publications

Ixazomib Citrate (MLN9708) Chemical Structure

CAS No. 1201902-80-8

Ixazomib Citrate (MLN9708) immediately hydrolyzed to Ixazomib (MLN2238), the biologically active form, on exposure to aqueous solutions or plasma. Ixazomib (MLN2238) inhibits the chymotrypsin-like proteolytic (β5) site of the 20S proteasome with IC50/Ki of 3.4 nM/0.93 nM in cell-free assays, less potent to β1 and little activity to β2. Ixazomib (MLN2238) induces autophagy. Phase 3.

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Selleck's Ixazomib Citrate (MLN9708) has been cited by 25 publications

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Biological Activity

Description Ixazomib Citrate (MLN9708) immediately hydrolyzed to Ixazomib (MLN2238), the biologically active form, on exposure to aqueous solutions or plasma. Ixazomib (MLN2238) inhibits the chymotrypsin-like proteolytic (β5) site of the 20S proteasome with IC50/Ki of 3.4 nM/0.93 nM in cell-free assays, less potent to β1 and little activity to β2. Ixazomib (MLN2238) induces autophagy. Phase 3.
Features The 1st oral proteasome inhibitor in early stage clinical trials for Multiple Myeloma.
Targets
20S proteasome [1]
(Cell-free assay)		 20S proteasome [1]
(Cell-free assay)
0.93 nM(Ki) 3.4 nM
In vitro

MLN9708 is a selective, orally bioavailable, second-generation proteasome inhibitor. MLN9708 has a shorter proteasome dissociation half-life and improved pharmacokinetics, pharmacodynamics, and antitumor activity compared with bortezomib, which we believe plays an important role in its improved tissue distribution. MLN9708 has a larger blood volume distribution at steady state, and analysis of 20S proteasome inhibition and markers of the unfolded protein response confirms that MLN9708 has greater pharmacodynamic effects in tissues than bortezomib. MLN9708 is a second-generation small-molecule proteasome inhibitor being developed for the treatment of a broad range of human malignancies. [1] Upon exposure to aqueous solutions or plasma, MLN9708 rapidly hydrolyzes to its biologically active form MLN2238. [2] MLN2238 is the biologically active form of MLN9708. [3]
Assay
Methods Test Index PMID
Western blot
PARP / Cleaved PARP / Caspase-3 / Cleaved Caspase-3 ; 

PubMed: 27687684     


(a-f) IMR-32 (a) NGP (b) NB-19 (c) SH-SY5Y (d) SK-N-AS (e) and LA-N-6 (f) cells were treated with 10 μM of ixazomib for various time points (0-24 hrs). The cells were then harvested at the end of the treatment, subjected to SDS-PAGE, and immunoblotted with PARP, Caspase-3, and β-actin primary antibodies. β-actin was used as a loading control for whole cell extracts in all samples.

Mcl-1 / Bcl-2 ; 

PubMed: 29348495     


Dose-dependent effects of MLN2238 treatment on Mcl-1 and Bcl-2 expression determined by western blot analysis. Cells exposed to the specified MLN2238 concentrations for 24 h.  

p53 / p21 / NOXA / PUMA / pRb / E2F / Cyclin D1 / CDK6 ; 

PubMed: 21724551     


(D and E) MM.1S cells were treated with MLN2238 (12 nM) for 24h and harvested; protein lysates were subjected to immunoblotting using indicated Abs. (F) MM.1R cells were treated with MLN2238 (12 nM) for 24h and harvested; protein lysates were subjected to immunoblotting using indicated Abs.

27687684 29348495 21724551
Growth inhibition assay
IC50; 

PubMed: 29416618     


The effect of ixazomib in a concentration-dependent manner for 72 h on viability of 28 representative DLBCL cell lines (10 non-GCB subtype and 18 GCB subtype) was assessed. The IC50 value for each cell line was calculated and plotted. * denotes double-hit DLBCL cell lines. 

29416618
In vivo MLN9708 shows superior antitumor activity in both solid tumor and hematologic preclinical xenograft models when administered via multiple dosing routes and regimens. [1] Recent preclinical pharmacology studies shows that MLN9708 has a shorter proteasome dissociation half-life than bortezomib, as well as improved pharmacokinetics, pharmacodynamics, and antitumor activity in xenograft models [2] MLN9708 has shown antitumor efficacy in a wide range of tumor xenografts. [4]

Protocol

Kinase Assay:[1]
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Kinase assay:

Calu-6 cells are cultured in MEM containing 10% fetal bovine serum and 1% penicillin/streptomycin and plated 1 day before the start of the experiment at 1 × 104 cells per well in a 384-well plate. Proteasome activity is assessed by monitoring hydrolysis of the chymotrypsin-like substrate Suc-LLVY-aminoluciferin in the presence of luciferase using the Proteasome-Glo assay reagents according to the manufacturer's instructions. Luminescence is measured using a LEADseeker instrument.
Cell Research:[1]
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  • Cell lines: Calu-6 cells
  • Concentrations: ~10 nM
  • Incubation Time: 1 hour or 30 minutes
  • Method: Calu-6 cells are cultured in MEM containing 10% FBS and 1% penicillin/streptomycin and plated 1 day before the start of the experiment at 1 × 104 cells per well in a 384-well plate. For IC50 determinations, cells are treated with varying concentrations of Bortezomib or MLN2238 in DMSO (0.5% final, v/v) for 1 hour at 37 °C. For reversibility experiments, cells are treated with either 1 μM Bortezomib or MLN2238 for 30 minutes at 37 °C and then washed thrice in medium to remove the Bortezomib or MLN2238. Cells are incubated for an additional 4 hours at 37 °C, after which the medium is removed and replaced with fresh medium.
    (Only for Reference)
Animal Research:[2]
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  • Animal Models: CB-17 SCID mice are subcutaneously inoculated with MM.1S cells
  • Dosages: 11 mg/kg
  • Administration: Twice weekly for 3 weeks (i.v.)
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 100 mg/mL (193.37 mM)
Water Insoluble
Ethanol Insoluble
In vivo Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
0.5% hydroxyethyl cellulose
For best results, use promptly after mixing. 		30 mg/mL

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 517.12
Formula

C20H23BCl2N2O9
CAS No. 1201902-80-8
Storage powder
in solvent
Synonyms N/A
Smiles B1(OC(=O)CC(O1)(CC(=O)O)C(=O)O)C(CC(C)C)NC(=O)CNC(=O)C2=C(C=CC(=C2)Cl)Cl

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)
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Clinical Trial Information

NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT03422874 Withdrawn Drug: MLN9708|Drug: Nelfinavir Neoplasms|Lymphoma Dartmouth-Hitchcock Medical Center August 2016 Phase 1
NCT02582359 Recruiting Drug: MLN9708|Drug: Cytarabine|Drug: Daunorubicin Acute Myeloid Leukemia Massachusetts General Hospital|Millennium Pharmaceuticals Inc. January 2016 Phase 1
NCT02250300 Completed Drug: MLN9708 Allogeneic Hematopoietic Stem Cell Transplantation Mehdi Hamadani|Medical College of Wisconsin November 19 2014 Phase 1|Phase 2
NCT01936532 Active not recruiting Drug: MLN9708|Drug: Lenalidomide|Drug: Dexamethasone Newly Diagnosed Multiple Myeloma Nantes University Hospital November 12 2014 Phase 2
NCT02168101 Completed Drug: MLN9708 Multiple Myeloma SCRI Development Innovations LLC|Millennium Pharmaceuticals Inc. September 2014 Phase 2

Tech Support

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Proteasome Signaling Pathway Map

Proteasome Inhibitors with Unique Features

  • Pan Proteasome Inhibitor

    Ixazomib (MLN2238) : β5 site, IC50=3.4 nM; β1 site, IC50=31 nM; β2 site, IC50=3500 nM.

  • FDA-approved Proteasome Inhibitor

    Carfilzomib (PR-171) : Approved by FDA for multiple myeloma.

  • Newest Proteasome Inhibitor

    Oprozomib (ONX 0912) : Orally bioavailable inhibitor for CT-L activity of 20S proteasome β5/LMP7 with IC50 of 36 nM/82 nM.

  • Classic Proteasome Inhibitor

    ONX-0914 (PR-957) : Selective immunoproteasome inhibitor with minimal cross-reactivity for the constitutive proteasome.

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  • MG-132

    MG132 (Z-Leu-Leu-Leu-al) is a potent cell-permeable proteasome and calpain inhibitor with IC50s of 0.1 μM and 1.2 μM for the inhibition of proteasome and calpain, respectively. MG132 activates autophagy and induces apoptosis in tumor cells.

  • Bortezomib (PS-341)

    Bortezomib (PS-341, LDP-341, MLM341, NSC 681239) is a potent 20S proteasome inhibitor with Ki of 0.6 nM. It exhibits favorable selectivity towards tumor cells over normal cells. Bortezomib (PS-341) inhibits NF-κB and induces ERK phosphorylation to suppress cathepsin B and inhibit the catalytic process of autophagy in ovarian cancer and other solid tumors.

  • Carfilzomib (PR-171)

    Carfilzomib (PR-171) is an irreversible proteasome inhibitor with IC50 of <5 nM in ANBL-6 cells, displayed preferential in vitro inhibitory potency against the ChT-L activity in the β5 subunit, but little or no effect on the PGPH and T-L activities. Carfilzomib activates prosurvival autophagy and induces cell apoptosis.

  • Ixazomib (MLN2238)

    Ixazomib (MLN2238) inhibits the chymotrypsin-like proteolytic (β5) site of the 20S proteasome with IC50 and Ki of 3.4 nM and 0.93 nM in cell-free assays, respectively, also inhibits the caspase-like (β1) and trypsin-like (β2) proteolytic sites, with IC50 of 31 and 3500 nM. Ixazomib (MLN2238) induces autophagy. Phase 3.

    Features:A first-in-class proteasome inhibitor that has improved pharmacokinetics (PK), pharmacodynamics(PD), and antitumor activity in preclinical studies.

  • ONX-0914 (PR-957)

    ONX-0914 (PR-957) is a potent and selective immunoproteasome inhibitor with minimal cross-reactivity for the constitutive proteasome in a cell-free assay.

    Features:The first highly selective, small molecule inhibitor of the immunoproteasome. Potential use in cancer and autoimmune diseases (e.g. rheumatoid arthritis, inflammatory bowel disease, and lupus).

  • Celastrol

    Celastrol (Tripterine) is a potent proteasome inhibitor for the chymotrypsin-like activity of a purified 20S proteasome with IC50 of 2.5 μM. Celastrol induces apoptosis and autophagy via the ROS/JNK signaling pathway. Celastrol inhibits dopaminergic neuronal death of Parkinson's disease through activating mitophagy.

    Features:A potent antioxidant and anti-inflammatory drug.

  • Oprozomib (ONX 0912)

    Oprozomib (ONX 0912, PR-047) is an orally bioavailable inhibitor for CT-L activity of 20S proteasome β5/LMP7 with IC50 of 36 nM/82 nM. Phase 1/2.

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID