Pifithrin-β hydrobromide 是一种 p53 的抑制剂，可逆地阻断 p53 依赖性转录激活和细胞凋亡。IC50值为23 μM。

Pifithrin-β hydrobromide is an inhibitor of p53; reversibly blocks p53-dependent transcriptional activation and apoptosis. Protects against neuronal death in models of stroke and neurodegenerative disorders. Active in vivo; protects mice from the side-effects of Y therapy associated with p53 induction. Supresses self-renewal of embryonic stem cells. Also aryl hydrocarbon receptor (AHR) agonist, causes upregulation of AHR target gene CYP1A1 (EC50 = 1.1 μM).

PFTα molecule could not take a planar conformation required for AhR activation whereas PFTβ showed a conformation similar to those of the prototypical AhR ligand β-naphthoflavone. In both cell lines, PFTα and PFTβ provoked different responses related with AhR activation. However, when cyclization of PFTα to PFTβ was hampered by acetylation of the exocyclic nitrogen, all these responses were not observed. These results lead to the conclusion that the activation of the AhR is probably caused by PFTβ instead of PFTα.

511296-88-1

C16H17BrN2S

349.29

Cyclic PFT-α;Pifithrin-β;Cyclic Pifithrin-α hydrobromide;PFT-β;PFT β (hydrobromide);Pifithrin-β hydrobromide

DMSO:26 mg/mL
Powder: -20°C for 3 years
In solvent: -80°C for 2 years