P4359 Sigma-Aldrich


≥95% (HPLC), powder

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



Related Categories Antitumor Agents, Apoptosis Inhibitors, Apoptosis and Cell Cycle, Bioactive Small Molecule Alphabetical Index, Bioactive Small Molecules,
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



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


5, 10 mg in glass bottle

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

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Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis


Certificate of Origin


Milli-Q® Water Purification Solutions
Protocols & Articles


Discover Bioactive Small Molecules for Apoptosis

Apoptosis, or programmed cell death (PCD), is a selective process for the removal of unnecessary, infected or transformed cells in various biological systems. As it plays a role in the homeostasis of...
Keywords: Apoptosis, Bioactive small molecules, Cancer, Clinical, Diseases, Ligands, Neurodegenerative Diseases

Discover Bioactive Small Molecules for Cell Cycle Research

In proliferating cells, the cell cycle consists of four phases. Gap 1 (G1) is the interval between mitosis and DNA replication that is characterized by cell growth. Replication of DNA occurs during t...
Keywords: Apoptosis, Bioactive small molecules, Cancer, Cell division, Cell proliferation, DNA replication, Diseases, Genetic

Oncogenes and Tumor Suppressors Reprogram Metabolism

Proliferating cells require the biosynthesis of structural components for biomass production and for genomic replication. This requires a reprogramming of the metabolic pathways to ensure nutrients s...
Keywords: Aerobic, Antitumor agents, Apoptosis, Biofiles, Cancer, Citric Acid Cycle, Degradations, Environmental, Events, Gene expression, Glycolysis, Growth factors, Metabolic Pathways, Metabolism, Metabolites, Nucleotide Synthesis, PAGE, Pentose phosphate pathway, Phosphorylations, Support

Peer-Reviewed Papers


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