PJ34 hydrochloride (Synonyms: PJ 34 Hydrochloride)

PJ34 is a novel and potent inhibitor of poly(ADP-ribose) polymerase (PARP), an enzyme involved in DNA repair and cell proliferation, that dose-dependently inhibits purified PARP enzyme in a cell-free assay with half maximal effective concentration EC₅₀ value of 20 nM. Unlike other PARP inhibitors (such as 3-AB), PJ34 does not possess any antioxidant properties but exhibits 10,000 times greater PARP inhibition than 3-AB (EC₅₀ = 200 μM). PJ34 has been found to have neuro-protective effects and enhance the chemotherapeutic effects in several tumor types. Study results have shown that PJ34 inhibits peroxynitrite-induced cell necrosis with EC₅₀ value of 20 nM and dose-dependently suppresses the growth of HepG2 cells.

Reference

[1].Sheng-Hui Huang, Min Xiong, Xiao-Ping Chen, Zhen-Yu Xiao, Yin-Feng Zhao and Zhi-Yong Huang. PJ34, an inhibitor of PARP-1, suppresses cell growth and enhances the suppressive effects of cisplatin in liver cancer cells. Oncology Reports 20: 567-572, 2008
[2].Galaleldin E. Abdelkarim, Karen Gertz, Christoph Harms, Juri Katchanov, Ulrich Dirnagl, Csaba Szabo and Matthias Enders. Protective effects of PJ34, a novel, potent inhibitor of poly(ADP-ribose) polymerase (PARP) in in vitro and in vivo models of stroke. International Journal of Molecular Medicine 7: 255-260, 2001