Learning and memory improver
View Patent ↗The present invention aims to provide antidementia agents which are free from the problem of side effects and are excellent in safety. The present invention also aims to provide agents for improving learning and memory which are useful for improvement of learning and memory and can be ingested continuously. The present invention provides antidementia agents and agents for improving learning and memory, each comprising a cyclic dipeptide with the 2,5-diketopiperazine structure as an active ingredient.
1. A method for improving or retarding the progress of a symptom of Alzheimer type dementia, comprising administering to a subject in need thereof an agent comprising 2,5-piperazinedione-3,6-bis(phenylmethyl)-,(3S,6S).
2. The method according to claim 1 , wherein the symptom is depression.
3. The method according to claim 1 , wherein the symptom is reduced learning motivation.
4. The method according to claim 1 , wherein the agent is administered orally.
5. A method for improving learning and memory in a subject having Alzheimer type dementia, comprising administering to a subject in need thereof an agent comprising 2,5-piperazinedione-3,6-bis(phenylmethyl)-,(3S,6S).
6. The method according to claim 5 , wherein the agent is administered orally.