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P4359

Sigma-Aldrich

Pifithrin-α

≥95% (HPLC), powder

Synonym(s):

2-(2-Imino-4,5,6,7-tetrahydrobenzothiazol-3-yl)-1-p-tolylethanone hydrobromide, PFT-α

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About This Item

Linear Formula:
C16H18N2OS·HBr
CAS Number:
63208-82-2
Molecular Weight:
367.30
MDL number:
MFCD00417851
UNSPSC Code:
12352200
PubChem Substance ID:
24898529
NACRES:
NA.77

Assay

≥95% (HPLC)

form

powder

storage condition

protect from light

color

off-white

mp

192.1-192.5 °C (lit.)

solubility

DMSO: 20 mg/mL

shipped in

wet ice

storage temp.

−20°C

SMILES string

Br[H].Cc1ccc(cc1)C(=O)CN2C(=N)SC3=C2CCCC3

InChI

1S/C16H18N2OS.BrH/c1-11-6-8-12(9-7-11)14(19)10-18-13-4-2-3-5-15(13)20-16(18)17;/h6-9,17H,2-5,10H2,1H3;1H

InChI key

HAGVCKULCLQGRF-UHFFFAOYSA-N

Application

Pifithrin-α has been used:
  • to study the effect of specific p53 inhibitor on p53-upregulated modulator of apoptosis (PUMA) expression after transient global cerebral ischemia (tGCI)
  • as p53 inhibitor to treat PA1 cells
  • as a tumor protein p53 (TRP53) inhibitor, to treat mouse lung epithelial-12 (MLE-12) cells

Biochem/physiol Actions

Pifithrin-α is a reversible inhibitor of p53-mediated apoptosis and p53-dependent gene transcription such as cyclin G, p21/waf1, and mdm2 expression. Pifithrin-α enhances cell survival after genotoxic stress such as UV irradiation and treatment with cytotoxic compounds including doxorubicin, etopoxide, paclitaxel, and cytosine-β-D-arabinofuranoside. Pifithrin-α protects mice from lethal whole body γ-irradiation without an increase in cancer incidence. The protective effect is not seen in p53-null mice or cells expressing a dominant negative mutant of the p53 gene. Protection is conferred by the transient expression of p53 in p53-deficient cell lines.

Features and Benefits

This compound is a featured product for Apoptosis research. Click here to discover more featured Apoptosis products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Potential role of PUMA in delayed death of hippocampal CA1 neurons after transient global cerebral ischemia
Niizuma K, et al.
Stroke, 40(2), 618-625 (2009)
E A Komarova et al.
Biochemistry. Biokhimiia, 65(1), 41-48 (2000-03-07)
The p53 protein is traditionally believed to be a tumor suppressor. Activation of p53-dependent apoptosis in response to damage to cell DNA provides for the elimination of possible tumor cell precursors. However, in some cases the activity of p53 can
Inhibition of regulatory-associated protein of mechanistic target of rapamycin prevents hyperoxia-induced lung injury by enhancing autophagy and reducing apoptosis in neonatal mice
Sureshbabu A, et al.
American Journal of Respiratory Cell and Molecular Biology, 55(5), 722-735 (2016)
Ahmed Malki et al.
Bioorganic chemistry, 72, 57-63 (2017-04-04)
Small molecules that can target human cancers have been highly sought to increase the anticancer efficacy, the present work describes the design and synthesis of novel series of five quinuclidinone derivatives (2a-2e). Their anticancer activities were investigated against breast cancer
Cory J Smith et al.
Nucleic acids research, 48(9), 5183-5195 (2020-04-22)
To extend the frontier of genome editing and enable editing of repetitive elements of mammalian genomes, we made use of a set of dead-Cas9 base editor (dBE) variants that allow editing at tens of thousands of loci per cell by
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