Name: Pifithrin-μ
Brand: Selleck Chemicals
SKU: S2930
Availability: InStock
Rating: 5 (27 reviews)

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Quality Control

Batch: Purity: 99.93%

99.93

Related Targets	Bcl-2 Caspase K-Ras PD-1/PD-L1 Ferroptosis Apoptosis related Synthetic Lethality STAT TNF-alpha Ras
Other p53 Inhibitors	Eprenetapopt (APR-246) Pifithrin-α (PFTα) Hhydrobromide Serdemetan (JNJ-26854165) RITA CBL0137 Hydrochloride PRIMA-1 NSC 319726 (ZMC1) Tenovin-1 Tenovin-6 NSC348884

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description
Saos-2 cells	Function assay	10 μM	48 h	Binding affinity to p53 transfected in human Saos-2 cells harboring pLV-53 assessed as reduction of p53 protein in mitochondria at 10 uM after 48 hrs
human T293 cells	Function assay	15 μM	48 h	Binding affinity to p53 transfected in human T293 cells assessed as reduction in p53 bound-Bcl-2 at 15 uM after 48 hrs
WI38 cells	Function assay	10 μM	24 h	Inhibition of p53-mediated apoptosis in human WI38 cells assessed as cell survival at 10 uM after 24 hrs by methylene blue assay
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 36 mg/mL (198.66 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 36 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection 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.
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.
Clear solution	5%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	2.000mg/ml (11.04mM)	Taking the 1 mL working solution as an example, add 50 μL of 40 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.

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.

Chemical Information, Storage & Stability

Molecular Weight	181.21	Formula	C₈H₇NO₂S	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	64984-31-2	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	NSC 303580, PFTμ, 2-Phenylethynesulfonamide			Smiles	C1=CC=C(C=C1)C#CS(=O)(=O)N

Mechanism of Action

Targets/IC₅₀/Ki	p53
In vitro	Pifithrin-μ interferes with p53 binding to mitochondria and inhibits rapid p53-dependent apoptosis of primary cell cultures of mouse thymocytes in response to gamma radiation. This compound, as an inhibitor of inducible HSP70, significantly inhibited cell viability with IC50 values ranging from 2.5 to 12.7 μM in acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL) cell lines, as well as in primary AML blasts. It is also highly active in primary AML blasts with a median IC50 of 8.9 μ M(range 5.7-37.2 μ M) and induces apoptosis and cell cycle arrest in a dose-dependent fashion. In addition, this chemical also increases the active form of caspase-3 and reduces AKT and ERK1/2 in NALM-6 cells. It increases Annexin V(+) cells in both caspase-dependent and -independent manners and promotes TRAIL-induced apoptosis and arrested cancer cell growth.
In vivo	Pifithrin-μ (40 mg/kg, ip) produces protective effect from p53-dependent apoptosis in C57B1/6J mice of 8 or 9 Gy of total body gamma radiation. In a xenograft mouse model, this compound significantly enhances the inhibition of TRAIL on MiaPaca-2 tumor growth.
References	[1] https://pubmed.ncbi.nlm.nih.gov/16862141/ [2] https://pubmed.ncbi.nlm.nih.gov/22829184/ [3] https://pubmed.ncbi.nlm.nih.gov/23371857/

Applications

Methods	Biomarkers	PMID
Western blot	p-LIMK / RhoA / p-4EBP1 c-Myc / Cyclin D1 / p21(WAF1/Cip)	20386595
Immunofluorescence	p53	26958937
Growth inhibition assay	Cell viability	24244355