Name: BIIB021
Brand: Selleck Chemicals
SKU: S1175
Rating: 5 (30 reviews)

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Quality Control

Batch: Purity: 99.89%

99.89

Related Targets	Akt Wnt/beta-catenin PKC ROCK Microtubule Associated Integrin Bcr-Abl Actin FAK Kinesin
Other HSP Inhibitors	Tanespimycin (17-AAG) Elesclomol (STA-4783) Luminespib (NVP-AUY922) Ganetespib (STA-9090) Alvespimycin (17-DMAG) Hydrochloride VER-155008 Onalespib (AT13387) Zelavespib (PU-H71) HSP990 (NVP-HSP990) NVP-BEP800

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description	PMID
MCF7	Function assay			Inhibition of HSP90-mediated client protein HER2 degradation in human MCF7 cells, IC50=0.038μM	20055425
BT474	Function assay			Binding affinity to Hsp90 nucleotide binding domain in human BT474 cells, IC50=0.14μM	20608738
MCF7	Function assay			Inhibition of HSP90alpha in human MCF7 cells assessed as degradation of Her-2, EC50=0.038μM	22938030
NCI-H295	Cytotoxicity assay	120 mg/kg	5 days	Cytotoxicity against human NCI-H295 cells overexpressing PGP xenografted in athymic mouse assessed as inhibition of tumor growth at 120 mg/kg, po qd for 5 days per week for 4 weeks	22938030
Sf9	Function assay		3 hrs	Binding affinity to human N-terminal polyHis-tagged HSP90alpha (D9 to E236) alpha-helix conformation expressed in insect sf9 cells after 3 hrs by fluorescence polarization assay, Ki=0.002μM	24332488
Sf9	Function assay		3 hrs	Binding affinity to human N-terminal polyHis-tagged HSP90beta (D9 to E236) expressed in insect sf9 cells after 3 hrs by fluorescence polarization assay, Ki=0.004μM	24332488
NCI-H1299	Function assay		12 hrs	Reduction in oxygen consumption rate in human NCI-H1299 cells incubated for 12 hrs	25383915
HeLa	Function assay	10 uM	6 hrs	Inhibition of HSP90 in human HeLa cells assessed as induction of chk1 degradation at 10 uM after 6 hrs by Western blot method	28816449
HeLa	Function assay	10 uM	6 hrs	Inhibition of HSP90 in human HeLa cells assessed as induction of Akt degradation at 10 uM after 6 hrs by Western blot method	28816449
HeLa	Function assay	10 uM	6 hrs	Inhibition of HSP90 in human HeLa cells assessed as induction of HSP70 protein expression at 10 uM after 6 hrs by Western blot method	28816449
PC3	Function assay	10 uM	6 hrs	Inhibition of HSP90 in human PC3 cells assessed as induction of chk1 degradation at 10 uM after 6 hrs by Western blot method	28816449
PC3	Function assay	10 uM	6 hrs	Inhibition of HSP90 in human PC3 cells assessed as induction of Akt degradation at 10 uM after 6 hrs by Western blot method	28816449
PC3	Function assay	10 uM	6 hrs	Inhibition of HSP90 in human PC3 cells assessed as induction of HSP70 protein expression at 10 uM after 6 hrs by Western blot method	28816449
TC32	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for TC32 cells	29435139
SJ-GBM2	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SJ-GBM2 cells	29435139
A673	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells	29435139
SK-N-MC	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells	29435139
NB-EBc1	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB-EBc1 cells	29435139
SK-N-SH	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-SH cells	29435139
NB1643	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB1643 cells	29435139
LAN-5	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells	29435139
Rh18	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh18 cells	29435139
OHS-50	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for OHS-50 cells	29435139
Rh41	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh41 cells	29435139
HCT116	Antiproliferative assay		48 hrs	Antiproliferative activity against human HCT116 cells after 48 hrs by sulforhodamine B assay, GI50=0.15μM	29567459
A549	Antiproliferative assay		48 hrs	Antiproliferative activity against human A549 cells after 48 hrs by sulforhodamine B assay, GI50=0.33μM	29567459
NCI-H1975	Antiproliferative assay		48 hrs	Antiproliferative activity against human NCI-H1975 cells after 48 hrs by sulforhodamine B assay, GI50=0.38μM	29567459
HL60	Antiproliferative assay		48 hrs	Antiproliferative activity against human HL60 cells after 48 hrs by sulforhodamine B assay, GI50=0.59μM	29567459
HL60	Function assay	1 uM	24 hrs	Inhibition of HSP90 in human HL60 cells assessed as induction of HSP70 expression at 1 uM after 24 hrs by Western blot analysis	29567459
HL60	Function assay	1 uM	24 hrs	Inhibition of HSP90 in human HL60 cells assessed as downregulation of phosphorylated Akt expression at 1 uM after 24 hrs by Western blot analysis	29567459
HL60	Function assay	1 uM	24 hrs	Inhibition of HSP90 in human HL60 cells assessed as downregulation of phosphorylated STAT3 expression at 1 uM after 24 hrs by Western blot analysis	29567459
HL60	Function assay	1 uM	24 hrs	Inhibition of HDAC in human HL60 cells assessed as upregulation of acetyl-alpha-tubulin levels at 1 uM after 24 hrs by Western blot analysis	29567459
HL60	Function assay	1 uM	24 hrs	Inhibition of HDAC in human HL60 cells assessed as upregulation of acetylated histone H3 levels at 1 uM after 24 hrs by Western blot analysis	29567459
MCF7	Antiproliferative assay			Antiproliferative activity against human MCF7 cells, IC50=0.31μM	31663736
Click to View More Cell Line Experimental Data

Chemical Information, Storage & Stability

Molecular Weight	318.76	Formula	C₁₄H₁₅ClN₆O	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	848695-25-0	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	CNF2024			Smiles	CC1=CN=C(C(=C1OC)C)CN2C=NC3=C2N=C(N=C3Cl)N

Solubility

In vitro
Batch:

DMSO : 64 mg/mL (200.77 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 12 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
=	×	×

Dilution Calculator Molecular Weight Calculator

In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	30%propylene glycol 1 5%Tween80 2 65%D5W Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	30.000mg/ml (94.11mM)	Taking the 1 mL working solution as an example, add 300 μL of 100 mg/ml clarified propylene glycol stock solution to 50 μL of Tween 80, mix evenly to clarify it; then continue to add 650 μL of D5W to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

In vivo Formulation Calculator (Clear solution)

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

Dosage: mg/kg Average weight of animals: g Dosing volume per animal:μL Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO + % + % Tween 80 + % ddH₂O

%DMSO+ %

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.

Mechanism of Action

Targets/IC₅₀/Ki	HSP90 (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 tumour growth inhibition. This compound inhibits tumour cell (BT474, MCF-7, N87, HT29, H1650, H1299, H69 and H82) proliferation with IC50 from 0.06-0.31 μM. It 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. This chemical inhibits Hodgkin's lymphoma cells (KM-H2, L428, L540, L540cy, L591, L1236 and DEV) with IC50 from 0.24-0.8 μM. It shows low activity in lymphocytes from healthy individuals. This compound inhibits the constitutive activity of NF-κB despite defective IκB. It 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. This chemical 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 enhanced G2 arrest. It is considerably more active than 17-AAG against adrenocortical carcinoma H295R, both in vitro and in vivo. The cytotoxic activity of this compound 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. It is also active in 17-AAG resistant cell lines (NIH-H69, MES SA Dx5, NCI-ADR-RES, Nalm6 and etc.).
Kinase Assay	Hsp90 Binding Assay
Kinase 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, this compound 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 this chemical or no Hsp90, respectively. The data are fit to a four-parameter curve and IC50 is generated.
In vivo	Oral administration of BIIB021 leads to tumour growth inhibition in many tumour xenograft models including N87, BT474, CWR22, U87, SKOV3 and Panc-1. This compound effectively inhibits growth of L540cy tumour at a dose of 120 mg/kg. It significantly enhances antitumor growth effect of radiation in JHU12 xenograft.
References	[1] https://pubmed.ncbi.nlm.nih.gov/19372565/ [2] https://pubmed.ncbi.nlm.nih.gov/19671844/ [3] https://pubmed.ncbi.nlm.nih.gov/19662650/ [4] https://pubmed.ncbi.nlm.nih.gov/19676042/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT01017198	Completed	Advanced Solid Tumors	Biogen	November 2009	Phase 1
NCT01004081	Completed	Breast Cancer	Biogen	November 2009	Phase 2
NCT00618735	Completed	Advanced Solid Tumors	Biogen	February 2008	Phase 1
NCT00618319	Completed	GIST	Biogen	February 2008	Phase 2

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BIIB021 HSP inhibitor

Chemical Structure

Molecular Weight: 318.76