S-20 New molecular targets toward anti-stroke medicine   S20-1. Discovery of prothymosin alpha, which inhibits ischemia-induced neuronal necrosis   S20-2. Neuroprotective function of PACAP and its molecular mechanism   S20-3. Perturbation of intracellular calcium homeostasis during transient ischemic attack in the brain and it's possible protection.   S20-4. Neuroprotective therapy with tPA