Abstract: An object of the present invention is to provide a composition for promoting sleep, that enables an increase of the sleep amounts in the overall night and in the initial stage of the night, a decrease of the sleep onset latent time, and an increase of the length of a sleep episode, and that is excellent in the stability and the safety. Another object of the present invention is to provide a food, a drug, and a feed that each include the composition for promoting sleep. The composition for promoting sleep is characterized in that the composition for promoting sleep includes a microorganism belonging to either Bifidobacterium adolescentis or Lactobacillus plantarum, or a culture thereof as an active ingredient.

Abstract: A medicine, a food or a drink and feed which are effective for preventing and/or improving decline, occurring with age (senescence), in memory and learning ability are provided. A novel microorganism having the effect of preventing and/or improving decline, occurring with age (senescence,) in memory and learning ability is provided. More specifically, the microorganism is characterized by being a microorganism belonging to Lactobacillus, Bifidobacterium, Streptococcus, Leuconostoc or Pediococcus, more specifically a microorganism belonging to any of Lactobacillus acidophilus, Lactobacillus gasseri, Lactobacillus gallinarum, Lactobacillus johnsonii, Lactobacillus delbrueckii subsp. delbrueckii, Bifidobacterium catenulatum, Bifidobacterium pseudolongum, Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium longum, Streptococcus thermophiles, Leuconostoc mesenteroides subsp. dextranicum, Leuconostoc lactis, Pediococcus acidilactici and Pediococcus pentosaceus.

Abstract: The present invention provides a life-extending agent comprising pyrroloquinoline quinone and/or a derivative of the pyrroloquinoline quinone.

Abstract: The present invention provides a life-extending agent comprising pyrroloquinoline quinone and/or a derivative of the pyrroloquinoline quinone.

Abstract: A method for screening a gene relating to a psychiatric disorder such as schizophrenia, which comprises the step of using a nematode behaviorally sensitized with amphetamine, methamphetamine, apomorphine, cocaine or the like for screening of a gene relating to the behavioral sensitization, and a method for screening a substance useful for prophylactic and/or therapeutic treatment of a psychiatric disorder, which comprises the step of using a nematode behaviorally sensitized with amphetamine, methamphetamine, apomorphine, cocaine or the like for screening of a substance that affects the behavioral sensitization.