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Asanuma, T.

Protection against malonate-induced ischemic brain injury in rat by a cell-permeable peptidic c-Jun N-terminal kinase inhibitor, (L)-HIV-TAT48-57-PP-JBD20, observed by the apparent diffusion coefficient mapping magnetic resonance imaging method.

The present experiments were carried out to provide direct in vivo evidence for the involvement of c-Jun N-terminal kinase (JNK) in the induction of ischemic brain injury. Malonate, which produces lesions similar to those of focal ischemia-reperfusion by a reversible inhibition of succinate dehydrogenase in mitochondria, was injected into the left striatum in the rat brain without or with the simultaneous injection of a cell permeable peptidic JNK inhibitor, (L)-HIV-TAT48-57-PP-JBD20. Two regions of malonate-induced brain injury were visualized as a hyperintense region with surrounding hypointense regions by apparent diffusion coefficient mapping magnetic resonance imaging. The JNK inhibitor significantly counteracted both hyper- and hypointense regions at the early stage of brain injury. Histological examination clarified that the inhibitor suppressed the induction of coagulation necrosis and spongy degeneration at early and late stages.[1]

References

Protection against malonate-induced ischemic brain injury in rat by a cell-permeable peptidic c-Jun N-terminal kinase inhibitor, (L)-HIV-TAT48-57-PP-JBD20, observed by the apparent diffusion coefficient mapping magnetic resonance imaging method. Asanuma, T., Inanami, O., Tabu, K., Waki, K., Kon, Y., Kuwabara, M. Neurosci. Lett. (2004)

Protection against malonate-induced ischemic brain injury in rat by a cell-permeable peptidic c-Jun N-terminal kinase inhibitor, (L)-HIV-TAT48-57-PP-JBD20, observed by the apparent diffusion coefficient mapping magnetic resonance imaging method.

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