Abstract: A marker for determining a mental disease is provided. The marker can be used in an objective diagnosis of such a mental disease. The marker contains one or more enterobacteria of Bifidobacterium, Lactobacillus, Lactobacillus brevis, Lactobacillus reuteri subgroup, Lactobacillus sakei subgroup, Atopobium cluster, Bacteroides fragilis group, Enterococcus, Clostridium coccoides group, Clostridium leptum subgroup, Staphylococcus, Clostridium perfringens, and Enterobacteriaceae.

Abstract: The object of the invention is to provide a method for easily and objectively detecting mood disorders in a subject by measuring the expression levels of prescribed genes in the peripheral blood of the subject, the reliability of the detection result being high. The invention also provides a method for detecting mood disorders in a subject, the method having a step for measuring the gene expression levels of ribosomal protein genes, CDKN1C, or any combination thereof in the peripheral blood derived from the subject, and detecting whether or not the subject has mood disorders on the basis of the measurement results.

Abstract: The present invention provides a novel therapeutic agent for mental illness. The therapeutic agent for mental illness comprises an IL-6 inhibitor as an active ingredient.

Abstract: A non-transitory computer-readable medium stores a program that, when executed, causes a computer to (i) cause a biomarker-measuring apparatus to measure concentrations of biomarkers, including a concentration of 3-hydroxybutyrate, in a blood sample collected from a subject to be tested, (ii) acquire the concentrations of the biomarkers measured by the biomarker-measuring apparatus, (iii) calculate a discriminant value based on the concentrations of the biomarkers, (iv) evaluate severity of depression of the subject or predict a symptom of depression of the subject based on the discriminant value, and (v) output results obtained from evaluating the severity of depression of the subject or from predicting the symptom of depression of the subject.

Abstract: An agent for improving brain function and agent for preventing or treating cognitive impairment, which comprises: 5 to 50 parts by weight of a protein; 5 to 80 parts by weight of a medium-chain fatty acid triglyceride as a lipid; and 1 to 50 parts by weight of a carbohydrate, per 100 parts by weight.

Abstract: The object of the invention is to provide a method for easily and objectively detecting mood disorders in a subject by measuring the expression levels of prescribed genes in the peripheral blood of the subject, the reliability of the detection result being high. The invention also provides a method for detecting mood disorders in a subject, the method having a step for measuring the gene expression levels of ribosomal protein genes, CDKN1C, or any combination thereof in the peripheral blood derived from the subject, and detecting whether or not the subject has mood disorders on the basis of the measurement results.

Abstract: An objective biomarker is capable of evaluating the severity of depression and is clinically useful. The biomarker is used for evaluating the severity of depression, and includes at least one compound selected from the group made of 4-aminobutyric acid (? (gamma)-aminobutyric acid: GABA), arginine, argininosuccinate, isoleucine, indole carboxaldehyde, potassium indoleacetate, carnitine, acetylcarnitine, ornithine, xanthurenate, kynurenate, kynurenine, citrate, creatine, creatinine, glutamine, dimethylglycine, serotonin, taurine, trimethyloxamine (TMAO), tryptophan, norvaline, 3-hydroxybutyrate, phenylalanine, proline, betaine, and lysine.

Abstract: The present invention provides a novel therapeutic agent for mental illness. The therapeutic agent for mental illness comprises an IL-6 inhibitor as an active ingredient.

Abstract: An agent for improving brain function and agent for preventing or treating cognitive impairment, which comprises: 5 to 50 parts by weight of a protein; 5 to 80 parts by weight of a medium-chain fatty acid triglyceride as a lipid; and 1 to 50 parts by weight of a carbohydrate, per 100 parts by weight.

Abstract: A marker for determining a mental disease is provided. The marker can be used in an objective diagnosis of such a mental disease. The marker contains one or more enterobacteria of Bifidobacterium, Lactobacillus, Lactobacillus brevis, Lactobacillus reuteri subgroup, Lactobacillus sakei subgroup, Atopobium cluster, Bacteroides fragilis group, Enterococcus, Clostridium coccoides group, Clostridium leptum subgroup, Staphylococcus, Clostridium perfringens, and Enterobacteriaceae.