Vajragupta O., Boonyarat C., Murakami Y., Tohda M., Matsumoto K., Olson A.J., Watanabe H. A novel neuroprotective agent with antioxidant and nitric oxide synthase inhibitory action.      Free Rad. Res. 32(2): 145-156, 2006

Sumanont Y., Murakami Y., Tohda M., Vajragupta O, Watanabe H., Matsumoto K. Prevention of kainic acid-induced changes in nitric oxide level and neuronal cell damage in the rat hippocampus by manganese complexes of curcumin and diacetylcurcumin.  Life Sci. 78(16): 1884-1891, 2006

Pinna G., Agis-Balboa RC, Zhubi A., Matsumoto K., Grayson D.R., Costa E., Guidotti A. Imidazenil and diazepam increase locomotor activity in mice exposed to protracted social isolation. Proc. Natl. Acad. Sci. USA 103(11): 4275-4280, 2006

Li S., Wang C., Wang M-W., Murakami Y, Matsumoto K. Impairment of the spatial learning and memory induced by learned helplessness and chronic mild stress. Pharmacol Biochem Behav. 83(2):186-193, 2006

Li S., Murakami Y., Wang M., Maeda K, Matsumoto K. The effects of chronic valproate and diazepam in a mouse model of posttraumatic stress disorder. Pharmacol Biochem Behav. 85: 324-331, 2006

Hussein G, Goto H., Oda S., Sankawa U., Matsumoto K., Watanabe H. Antihypertensive potential and mechanism of action of astaxanthin: III. Antioxidant and histopathological effects in spontaneous hypertensive rats.  Biol. Pharm. Bull. 29(4): 684-688, 2006