Date published: 2026-4-24

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Pifithrin-μ (CAS 64984-31-2)

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Alternate Names:
2-Phenylacetylenesulfonamide; NSC 303580
Application:
Pifithrin-µ is an inhibitor of p53 activity and HSP 70 activity
CAS Number:
64984-31-2
Purity:
≥98%
Molecular Weight:
181.2
Molecular Formula:
C8H7NO2S
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Pifithrin-μ is a cell-permeable sulfonamide inhibitor of p53 binding and an anti-apoptotic. Direct inhibition of p53 binding to mitochondria as well as to Bcl-xL and Bcl-2 proteins by Pifithrin-mu has been observed. Pifithrin-mu selectively inhibits p53 translocation to mitochondria without affecting the transactivation function of p53. Pifithrin-mu may act to reduce gamma-radiation induced cell death in vitro. Unlike pifithrin-alpha (sc-45050), pifithrin-mu targets only the mitochondrial branch of the p53 pathway without affecting the important transcriptional functions of p53. Pifithrin-mu selectively inhibits HSP 70 (heat shock protein 70) activity. Pifithrin-µ is an artificial substance extensively utilized in diverse scientific investigations. This compound exhibits remarkable versatility, enabling the exploration of numerous biological activities, such as protein-protein interactions, enzyme-substrate interactions, and receptor-ligand interactions.


Pifithrin-μ (CAS 64984-31-2) References

  1. Small-molecule inhibitor of p53 binding to mitochondria protects mice from gamma radiation.  |  Strom, E., et al. 2006. Nat Chem Biol. 2: 474-9. PMID: 16862141
  2. The transcription-independent mitochondrial p53 program is a major contributor to nutlin-induced apoptosis in tumor cells.  |  Vaseva, AV., et al. 2009. Cell Cycle. 8: 1711-9. PMID: 19411846
  3. Do burdens of underweight and overweight coexist among lower socioeconomic groups in India?  |  Subramanian, SV., et al. 2009. Am J Clin Nutr. 90: 369-76. PMID: 19515733
  4. The therapeutic potential of p53 reactivation by nutlin-3a in ALK+ anaplastic large cell lymphoma with wild-type or mutated p53.  |  Drakos, E., et al. 2009. Leukemia. 23: 2290-9. PMID: 19741726
  5. BclxL changes conformation upon binding to wild-type but not mutant p53 DNA binding domain.  |  Hagn, F., et al. 2010. J Biol Chem. 285: 3439-50. PMID: 19955567
  6. Enhancement of cell recovery for dissociated human embryonic stem cells after cryopreservation.  |  Xu, X., et al. 2010. Biotechnol Prog. 26: 781-8. PMID: 20014103
  7. Elevation in body temperature to fever range enhances and prolongs subsequent responsiveness of macrophages to endotoxin challenge.  |  Lee, CT., et al. 2012. PLoS One. 7: e30077. PMID: 22253887
  8. Combretastatin A-4 induces p53 mitochondrial-relocalisation independent-apoptosis in non-small lung cancer cells.  |  Méndez-Callejas, GM., et al. 2014. Cell Biol Int. 38: 296-308. PMID: 24155061
  9. Evaluation of zinc (II) chelators for inhibiting p53-mediated apoptosis.  |  Morita, A., et al. 2013. Oncotarget. 4: 2439-50. PMID: 24280450
  10. Cell death induced by 2-phenylethynesulfonamide uncovers a pro-survival function of BAX.  |  Mattiolo, P., et al. 2014. Cancer Lett. 354: 115-21. PMID: 25111896
  11. The Anti-Inflammatory Effects of the Small Molecule Pifithrin-µ on BV2 Microglia.  |  Fleiss, B., et al. 2015. Dev Neurosci. 37: 363-75. PMID: 25721106
  12. β-asarone inhibited cell growth and promoted autophagy via P53/Bcl-2/Bclin-1 and P53/AMPK/mTOR pathways in Human Glioma U251 cells.  |  Wang, N., et al. 2018. J Cell Physiol. 233: 2434-2443. PMID: 28776671
  13. Rapid LC-MS Based High-Throughput Screening Method, Affording No False Positives or False Negatives, Identifies a New Inhibitor for Carbonic Anhydrase.  |  Imaduwage, KP., et al. 2017. Sci Rep. 7: 10324. PMID: 28871149

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Pifithrin-μ, 10 mg

sc-203195
10 mg
$130.00

Pifithrin-μ, 50 mg

sc-203195A
50 mg
$379.00