国家自然科学基金青年基金31201045;四川省应用基础研究计划2012JY0113;四川省教育厅科研项目13ZB0094;成都医学院自然科学基金CYZ11-007Supported by the National Natural Science Foundation for Young Scholars of China 31201045,the Project of Applied Basic Research Program of Sichuan Province 2012JY0113,the Project of Sichuan Committee of Education 13ZB0094 and the Natural Science Foundation of Chengdu Medical College CYZ11-007.