| abstract |
A screening tool and a screening method of a substancenwhich is useful as an agent for improving the memory, annagent for improving learning ability, and/or an antidementianagent; a polypeptide, a polynucleotide, a vector, and a cellnwhich may be used in the above screening; and a novel agentnfor improving the memory, a novel agent for improvingnlearning ability, and/or a novel antidementia agent arendisclosed. The above screening tool is composed of ancalcium-permeable nonselective cation channel or a cellnexpressing the channel. |