Analysis of the neuropathological mechanism by using calpain mutant mice

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In this study, we have analyzed the motor abnoromality in calpain-1 and calpain-2 double knockout mice. Neuron-specific deleted knockout showed abnormalities in motor and/or visual capacity in Morris water maze test. Then, we identified several substrates of calpain-1 and calpain-2, which relate the functional abnormalities, by masspectrometic technique and the iTRAQ method. However, some of the substrates were not cleaved so much by calpain. Thus, we are trying to identify calpain substrates in cell culture system using calcium ionophores.