Abstract: A processor acquires path information and stores the path information in a storage unit, determines whether or not the moving body is in a lost state based on the path information from the storage unit, and generates and outputs route information that guides the moving body to a predetermined place when the moving body is determined to be in the lost state. The processor acquires the path information as an input parameter, inputs the path information to a determination learning model, and outputs whether or not the moving body is in the lost state as an output parameter. The model is a learning model generated by machine learning using an input and output data set in which path information is used as an input parameter for learning and a determination result of whether or not path information is in the lost state is used as an output parameter for learning.

Abstract: Therapeutic agents effective for treating cell-proliferative diseases contain extracellular vesicles (exosomes) released from cytotoxic T cells or miRNA obtained from extracellular vesicles (exosomes) released from cytotoxic T cells, such as human CD8+ T cells. Such therapeutic agents suppress the proliferation of mesenchymal cells surrounding cancer cells, e.g., by killing the mesenchymal cells, such that the cancer cells become isolated and unable to metastasize. Cell-proliferative diseases are thus treatable by administering such a therapeutic agent to a patient.

Abstract: The present invention aims to provide a method for preparing exosomes comprising: (i) a step for ultrafiltering a sample containing at least one exosome; and (ii) a step for subjecting the sample that can be obtained from step (i) to anion exchange column chromatography.

Abstract: Therapeutic agents effective for treating cell-proliferative diseases contain extracellular vesicles (exosomes) released from cytotoxic T cells or miRNA obtained from extracellular vesicles (exosomes) released from cytotoxic T cells, such as human CD8+ T cells. Such therapeutic agents suppress the proliferation of mesenchymal cells surrounding cancer cells, e.g., by killing the mesenchymal cells, such that the cancer cells become isolated and unable to metastasize. Cell-proliferative diseases are thus treatable by administering such a therapeutic agent to a patient.

Abstract: Disclosed is a substance which has a low molecular weight, can be applied in a simpler manner, and has an immunopotentiating activity against cancer and/or a microorganism-mediated infectious disease. An EP4 agonist exhibits an immunopotentiating activity through the activation of a cytotoxic T cell, and is therefore useful for the prevention and/or treatment of cancer or a microorganism-mediated infection disease.

Abstract: An EP1 agonist has an immunopotentiating effect mediated by cytotoxic T lymphocyte activation and/or natural killer cell activation, and is thus useful for the prevention and/or treatment of cancers, microbial infectious diseases and the like.

Abstract: Disclosed is a substance which has a low molecular weight, can be applied in a simpler manner, and has an immunopotentiating activity against cancer and/or a microorganism-mediated infectious disease. An EP4 agonist exhibits an immunopotentiating activity through the activation of a cytotoxic T cell, and is therefore useful for the prevention and/or treatment of cancer or a microorganism-mediated infection disease.