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Description: Inhibitor of p53-mitochondrial binding
Alternative Names: NSC 303580
Chemical Name: 2-Phenylethynesulfonamide
Purity: ≥99% (HPLC)
Citations (6)
Reviews (1)
Literature (2)
Pathways (1)

Biological Activity for Pifithrin-μ

Pifithrin-μ inhibits p53 binding to mitochondria by reducing its affinity for antiapoptotic proteins Bcl-2 and Bcl-XL. Displays no effect on the transactivational or cell cycle checkpoint control function of p53. Potentially increases reprogramming efficiency of human somatic cells to induced pluripotent stem cells (iPSCs) by silencing p53. Pifithrin-μ reduces cell death induced by γ-radiation in vitro and protects mice from doses of radiation that cause lethal hematopoietic syndrome. Selectively inhibits heat shock protein 70 (HSP70) activity.

Technical Data for Pifithrin-μ

M. Wt 181.21
Formula C8H7NO2S
Storage Store at +4°C
Purity ≥99% (HPLC)
CAS Number 64984-31-2
PubChem ID 327653
Smiles NS(=O)(=O)C#CC1=CC=CC=C1

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

Tocris products are intended for laboratory research use only, unless stated otherwise.

Solubility Data for Pifithrin-μ

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 13.12 100
ethanol 13.12 100

Preparing Stock Solutions for Pifithrin-μ

The following data is based on the product molecular weight 181.21. Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Select a batch to recalculate based on the batch molecular weight:
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 5.52 mL 27.59 mL 55.18 mL
5 mM 1.1 mL 5.52 mL 11.04 mL
10 mM 0.55 mL 2.76 mL 5.52 mL
50 mM 0.11 mL 0.55 mL 1.1 mL

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Product Datasheets for Pifithrin-μ

Certificate of Analysis / Product Datasheet
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References for Pifithrin-μ

References are publications that support the biological activity of the product.

Strom et al (2006) Small-molecule inhibitor of p53 binding to mitochondria protects mice from gamma radiation. Nat.Chem.Biol. 2 474 PMID: 16862141

Leu et al (2009) A small molecule inhibitor of inducible heat shock protein 70 (HSP70). Mol.Cell 36 15 PMID: 19818706

Kawamura et al (2009) Linking the p53 tumor suppressor pathway to somatic cell reprogramming. Nature 460 1140 PMID: 19668186

Steele et al (2009) 2-phenylacetylenesulfonamide (PAS) induces p53-independent apoptotic killing of B-chronic lymphocytic leukemia (CLL) cells. Blood 114 1217 PMID: 19515722

If you know of a relevant reference for Pifithrin-μ, please let us know.

View Related Products by Product Action

View all p53 Inhibitors

Keywords: Pifithrin-mu, Pifithrin-mu supplier, inhibitors, inhibits, p53-mitochondrial, binding, Transcription, Factors, MDM2, p14ARF, Pifithrin-mu, NSC303580, NSC, 303580, p53, Stem, Cell, Reprogramming, Hsp70, 2653, Tocris Bioscience

6 Citations for Pifithrin-μ

Citations are publications that use Tocris products. Selected citations for Pifithrin-μ include:

Kojima et al (2010) The novel tryptamine derivative JNJ-26854165 induces wild-type p53- and E2F1-mediated apoptosis in acute myeloid and lymphoid leukemias. Mol Cancer Ther 9 2545 PMID: 20736344

Li et al (2018) Zinc deficiency causes neural tube defects through attenuation of p53 ubiquitylation. Development 145 PMID: 30545932

Xia et al (2014) EZH2 silencing with RNA interference induces G2/M arrest in human lung cancer cells in vitro. Biomed Res Int 2014 348728 PMID: 24745014

Nemade et al (2018) Cell death mechanisms of the anti-cancer drug EPEG on human cardiomyocytes isolated from pluripotent stem cells. Arch Toxicol 92 1507 PMID: 29397400

Blatzer et al (2015) Blocking Hsp70 Enhances the Efficiency of amphote. B Treatment against Resistant Aspergillus terreus Strains. Antimicrob Agents Chemother 59 3778 PMID: 25870060

Wang et al (2013) Active Constituents from Liriope platyphylla Root against Cancer Growth In Vitro. PLoS One 2013 857929 PMID: 23762164

Do you know of a great paper that uses Pifithrin-μ from Tocris? Please let us know.

Reviews for Pifithrin-μ

Average Rating: 5 (Based on 1 Review.)

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By Anonymous on 07/12/2020
Assay Type: In Vivo
Species: Mouse
Cell Line/Tissue: neural cell

Pifithrin-µ were dissolved in DMSO and used at a final concentration of 50 µM for pifithrin-µ according to previous studies in which 10-50 µM pifithrin-µ were employed.

PMID: 30545932
review image

Literature in this Area

Tocris offers the following scientific literature in this area to showcase our products. We invite you to request* your copy today!

*Please note that Tocris will only send literature to established scientific business / institute addresses.

Cell Cycle and DNA Damage Research Product Guide

Cell Cycle and DNA Damage Research Product Guide

This product guide provides a review of the cell cycle and DNA damage research area and lists over 150 products, including research tools for:

  • Cell Cycle and Mitosis
  • DNA Damage Repair
  • Targeted Protein Degradation
  • Ubiquitin Proteasome Pathway
  • Chemotherapy Targets
Cell Cycle & DNA Damage Repair Poster

Cell Cycle & DNA Damage Repair Poster

In normal cells, each stage of the cell cycle is tightly regulated, however in cancer cells many genes and proteins that are involved in the regulation of the cell cycle are mutated or over expressed. This poster summarizes the stages of the cell cycle and DNA repair. It also highlights strategies for enhancing replicative stress in cancer cells to force mitotic catastrophe and cell death.

Pathways for Pifithrin-μ

p53 Signaling Pathway

p53 Signaling Pathway

p53 signaling plays an important role in the co-ordination of the cellular response different types of stress such as DNA damage and hypoxia. The downstream signals lead to apoptosis, senescence and cell cycle arrest.