BIIB021

Catalog No.S1175 Batch:S117501

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Technical Data

Formula

C14H15ClN6O
Molecular Weight 318.76 CAS No. 848695-25-0
Solubility (25°C)* In vitro DMSO 64 mg/mL (200.77 mM)
Ethanol 2 mg/mL (6.27 mM)
Water Insoluble
* <1 mg/ml means slightly soluble or insoluble.
* 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.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

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Biological Activity

Description BIIB021 (CNF2024) is an orally available, fully synthetic small-molecule inhibitor of HSP90 with Ki and EC50 of 1.7 nM and 38 nM, respectively. Phase 2.
Targets
HSP90 [1]
(Cell-free assay)
1.7 nM(Ki)
In vitro BIIB021 binds in the ATP-binding pocket of Hsp90, interferes with Hsp90 chaperone function, and results in client protein degradation and tumor growth inhibition. BIIB021 inhibits tumor cell (BT474, MCF-7, N87, HT29, H1650, H1299, H69 and H82) proliferation with IC50 from 0.06-0.31 μM. BIIB021 induces the degradation of Hsp90 client proteins including HER-2, Akt, and Raf-1 and up-regulated expression of the heat shock proteins Hsp70 and Hsp27. [1] BIIB021 inhibits Hodgkin's lymphoma cells (KM-H2, L428, L540, L540cy, L591, L1236 and DEV) with IC50 from 0.24-0.8 μM. BIIB021 shows low activity in lymphocytes from healthy individuals. BIIB021 inhibits the constitutive activity of NF-κB despite defective IκB. BIIB021 induces the expression of ligands for the activating NK cell receptor NKG2D on Hodgkin's lymphoma cells resulting in an increased susceptibility to NK cell–mediated killing. [2] BIIB021 enhanced the in vitro radiosensitivity of HNSCCA cell lines (UM11B and JHU12) with a corresponding reduction in the expression of key radioresponsive proteins, increased apoptotic cells and enhance G2 arrest. [3] BIIB021 is considerably more active than 17-AAG against adrenocortical carcinoma H295R, both in vitro and in vivo. The cytotoxic activity of BIIB021 is not influenced by loss of NQO1 or Bcl-2 overexpression, molecular lesions that do not prevent client loss but are nonetheless associated with reduced cell killing by 17-AAG. BIIB021 is also active in 17-AAG resistant cell lines (NIH-H69, MES SA Dx5, NCI-ADR-RES, Nalm6 and etc.). [4]
In vivo Oral administration of BIIB021 leads to tumor growth inhibition in many tumor xenograft models including N87, BT474, CWR22, U87, SKOV3 and Panc-1. [1] BIIB021 effectively inhibits growth of L540cy tumor at a dose of 120 mg/kg. [2] BIIB021 significantly enhances antitumor growth effect of radiation in JHU12 xenograft. [3]

Protocol (from reference)

Kinase Assay:[1]
  • Hsp90 Binding Assay

    For fluorescence polarization competition measurements, the FITC-geldanamycin probe (20 nM) is reduced with 2 mM TCEP at room temperature for 3 hours, after which the solution is aliquoted and stored at -80 °C until used. Recombinant human Hsp90α (0.8 nM) and reduced FITC-geldanamycin (2 nM) are incubated in a 96-well microplate at room temperature for 3 hours in the presence of assay buffer containing 20 mM HEPES (pH 7.4), 50 mM KCl, 5 mM MgCl2, 20 mM Na2MoO4, 2 mM DTT, 0.1 mg/mL BGG, and 0.1% (v/v) CHAPS. Following this preincubation, BIIB021 in 100% DMSO is then added to final concentrations of 0.2 nM to 10 μM (final volume 100 μL, 2% DMSO). The reaction is incubated for 16 hours at room temperature and fluorescence is then measured in an Analyst plate reader, excitation = 485 nm, emission = 535 nm. High and low controls contained no BIIB021 or no Hsp90, respectively. The data are fit to a four-parameter curve and IC50 is generated.
Cell Assay:[1]
  • Cell lines

    BT474, MCF-7, N87, HT29, H1650, H1299, H69 and H82 cells

  • Concentrations

    3 nM - 1 μM

  • Incubation Time

    5 days

  • Method

    A modified tetrazolium salt assay is used to measure the IC50. Tumor cells are added to 96-well plates and propagated for 24 hours before BIIB021 addition. BIIB021 is added to the plated cells. DMSO (0.03-0.003%) is included as a vehicle control. After incubation phenazine methosulfate (stock concentration 1 mg/mL) and 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt (stock concentration 2 mg/mL) are mixed at a ratio of 1:20 and added to each well of a 96-well plate. Reduction of 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt gives rise to a soluble formazan product that is secreted into the culture medium. After 4 hours incubation, the formazan product is quantitated spectrophotometrically at a wavelength of 490 nm. Data are acquired using SOFTmaxPRO software, and 100% viability is defined as the A490 of DMSO-treated cells stained with 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt (the mean A490 of cells treated with DMSO at a range of 0.03-0.003%). Percent viability of each sample is calculated from the A490 values as follows: % viability = (A490 nm sample / A490 nm DMSO-treated cells × 100). The IC50 is defined as the concentration that gives rise to 50% inhibition of cell viabilit
Animal Study:[1]
  • Animal Models

    N87, BT474, CWR22, U87, SKOV3 and Panc-1 tumor models in BALB/c and athymic mice

  • Dosages

    31, 62.5, and 125 mg/kg

  • Administration

    Orally administered once daily

Customer Product Validation

Data from [Acta Pharmacol Sin, 2013, 34(12), 1545-53]

Data from [Acta Pharmacol Sin, 2013, 34(12), 1545-53]

Data from [Acta Pharmacol Sin, 2013, 34(12), 1545-53]

Data from [Acta Pharmacol Sin, 2013, 34(12), 1545-53]

Selleck's BIIB021 has been cited by 33 publications

A novel PET probe to selectively image heat shock protein 90α/β isoforms in the brain [ EJNMMI Radiopharm Chem, 2024, 9(1):19] PubMed: 38436869
m6A modification confers thermal vulnerability to HPV E7 oncotranscripts via reverse regulation of its reader protein IGF2BP1 upon heat stress [ Cell Rep, 2022, 41(4):111546] PubMed: 36288717
deepOrganoid: A brightfield cell viability model for screening matrix-embedded organoids [ SLAS Discov, 2022, 27(3):175-184] PubMed: 35314378
The Disassociation of the A20/HSP90 Complex via Downregulation of HSP90 Restores the Effect of A20 Enhancing the Sensitivity of Hepatocellular Carcinoma Cells to Molecular Targeted Agents [ Front Oncol, 2021, 11:804412] PubMed: 34976842
Heat Shock Protein 90 Triggers Multi-Drug Resistance of Ovarian Cancer via AKT/GSK3β/β-Catenin Signaling [ Front Oncol, 2021, 11:620907] PubMed: 33738259
HSP90 Inhibitor, NVP-AUY922, Improves Myelination in Vitro and Supports the Maintenance of Myelinated Axons in Neuropathic Mice. [ ACS Chem Neurosci, 2019, 10(6):2890-2902] PubMed: 31017387
Mutation Profiles in Glioblastoma 3D Oncospheres Modulate Drug Efficacy. [ SLAS Technol, 2019, 24(1):28-40] PubMed: 30289729
Targeting CDK2 overcomes melanoma resistance against BRAF and Hsp90 inhibitors [ Mol Syst Biol, 2018, 14(3):e7858] PubMed: 29507054
ATM Is Required for the Prolactin-Induced HSP90-Mediated Increase in Cellular Viability and Clonogenic Growth After DNA Damage. [Karayazi Atici, et al. Endocrinology, 2018, 159(2):907-930] PubMed: 29186352
The Toxmatrix: Chemo-Genomic Profiling Identifies Interactions That Reveal Mechanisms of Toxicity [ Chem Res Toxicol, 2018, 31(2):127-136] PubMed: 29156121

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Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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