Neuroprotective effects and mechanisms of Chuanxiong Chatiao pulvis against MPTP-induced dopaminergic neurotoxicity in mice model of parkinson‘s disease Cardioprotective effects of Yiqi Yangyin Huoxue Injection against ischemia-reperfusion injury in isolated hearts of rats Effects of scorpion venom heat-resistant protein on intracerebral NO synthase of mice with Parkinson‘s disease Effects of protocatechuic acid on expression of D2DR, iNOS, and TH in striatum and midbrain of Parkinson‘s disease model mice