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Description:

IC50: 150, 220, and 70 nM for hJNK1, hJNK2, and hJNK3, respectively

Recent evidence suggests activation of the c-Jun NH2-terminal protein kinase (JNK) signal transduction pathway may play a role in ischemia-induced cell death. Therefore, preventing the activation of JNK, or c-Jun phosphorylation could be neuroprotective. AS601245 is a c-Jun NH2-terminal protein kinase inhibitor.

In vitro: AS601245 demonstrated a nonspecific inhibition of the three JNK human isoforms. AS601245 inhibits isolated hJNK3 in an ATPcompetitive manner. Selectivity of AS601245 was tested against a large panel of kinases. It exhibited 10- to 20-fold selectivity over c-src, CDK2, and c-Raf and more than 50- to 100-fold selectivity over a range of Tyr- and Ser/Thr-protein kinases [1].

In vivo: AS601245 administered i.p. provided significant protection against the delayed loss of hippocampal CA1 neurons in a gerbil model of transient global ischemia. This effect is mediated by JNK inhibition and thus by c-Jun expression and phosphorylation. A significant neuroprotective effect of AS601245 administered either by i.p. injection or as i.v. bolus followed by an i.v. infusion was also observed in rats after focal cerebral ischemia [1].

Clinical trial: Up to now, AS601245 is still in the preclinical development stage.

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