Abstract: A peptide consisting of an amino acid sequence of GPPGPAG (SEQ ID NO: 1) is disclosed. According to the present invention, a novel compound for improving memory disorder is provided.

Abstract: A peptide consisting of an amino acid sequence of GPPGPAG (SEQ ID NO: 1) is disclosed. According to the present invention, a novel compound for improving memory disorder is provided.

Abstract: Provided are a clinically applicable drug for radical cure of Alzheimer's disease (AD), and a drug for treating neurological diseases associated with axonal dysfunction other than AD, wherein the drug utilizes the mechanism of action of the AD radical cure therapy. The drugs are oral drugs, each comprising one or more compounds selected from diosgenin, a diosgenin derivative and a pharmaceutically acceptable salt thereof, the one or more compounds being suspended in an edible oil.

Abstract: A primary objective is to provide a drug for radical cure and a therapeutic method for diseases associated with axonal dysfunction (for example, Alzheimer's disease, dementia, Parkinson's disease, spinal cord injury, or brain contusion) based on the pathogenic mechanism thereof. Provided is a compound having a stimulating activity on 1,25D3-MARRS or a pharmaceutically acceptable salt thereof. Also provided is a technical idea relating to a pharmaceutical composition for disease treatment comprising a therapeutically effective amount thereof, a production method, a method for preventing or treating a disease, and a kit.

Abstract: There is provided a neuronal cell death inhibitor having a high efficacy. A neuronal cell death inhibitor comprising a compound of general formula (1) below: (where R1 is a hydrogen atom or an optionally substituted hydroxy group; R2 is a hydrogen atom; R3 is a hydrogen atom or an optionally substituted hydroxy group; R4 is a hydrogen atom or an optionally substituted hydroxy group, R3 together with R4 is optionally an oxo group or a group of —O—(CH2)n—O— (where n is an integer of 2 to 4), or R2 together with R4 optionally forms an unsaturated bond between carbon atoms, the respective carbon atoms being attached to R2 and R4; R5 is a hydrogen atom or an optionally substituted lower alkyl group; each of R6, R7, and R8 is the same as or different from each other and is a hydrogen atom, an optionally substituted hydroxy group, an optionally substituted alkyl group, an optionally substituted aryl group, or an optionally substituted heteroaryl group); or a salt thereof.