Abstract: [Problem to be Solved] It is an object of the present invention to provide a preventive or therapeutic composition for a therapy-resistant cancer having therapy-resistant cancer cells. [Solution] A preventive or therapeutic composition for a therapy-resistant cancer having therapy-resistant cancer cells, which is for use in photodynamic therapy, wherein the composition comprises ALAs.

Abstract: To provide a therapeutic agent and a diagnostic agent for mitochondrial dysfunction brain diseases including cerebral infarction as a representative. A therapeutic agent for a mitochondrial dysfunction brain disease, which comprises (A) ?-aminolevulinic acid represented by the formula (1), a derivative thereof, or a salt thereof and (B) an iron compound in combination. R2R1NCH2COCH2CH2COR3??(1) wherein R1 and R2 each independently represents a hydrogen atom, an alkyl group, an acyl group, an alkoxycarbonyl group, an aryl group, or an aralkyl group; and R3 represents a hydroxy group, an alkoxy group, an acyloxy group, an alkoxycarbonyloxy group, an aryloxy group, an aralkyloxy group, or an amino group.

Abstract: To provide a therapeutic agent and a diagnostic agent for mitochondrial dysfunction brain diseases including cerebral infarction as a representative. A therapeutic agent for a mitochondrial dysfunction brain disease, which comprises (A) ?-aminolevulinic acid represented by the formula (1), a derivative thereof, or a salt thereof and (B) an iron compound in combination. R2R1NCH2COCH2CH2COR3 ??(1) wherein R1 and R2 each independently represents a hydrogen atom, an alkyl group, an acyl group, an alkoxycarbonyl group, an aryl group, or an aralkyl group; and R3 represents a hydroxy group, an alkoxy group, an acyloxy group, an alkoxycarbonyloxy group, an aryloxy group, an aralkyloxy group, or an amino group.

Abstract: To provide a therapeutic agent and a diagnostic agent for mitochondrial dysfunction brain diseases including cerebral infarction as a representative. A therapeutic agent for a mitochondrial dysfunction brain disease, which comprises (A) ?-aminolevulinic acid represented by the formula (1), a derivative thereof, or a salt thereof and (B) an iron compound in combination. R2R1NCH2COCH2CH2COR3 ??(1) wherein R1 and R2 each independently represents a hydrogen atom, an alkyl group, an acyl group, an alkoxycarbonyl group, an aryl group, or an aralkyl group; and R3 represents a hydroxy group, an alkoxy group, an acyloxy group, an alkoxycarbonyloxy group, an aryloxy group, an aralkyloxy group, or an amino group.