[Microphysiological System(MPS)for Drug Research, the Current Situation and the Future].

The development of new in vitro cell culture systems, the microphysiological systems(MPSs), is progressing rapidly around the world. MPS is a biomimetic cell culture system that recapitulate tissue biology(patho)physiologically using clinically derived specimens, organoids, or differentiated cells from stem cells on a culture device with circulation and detection devices. New disease model systems are being constructed using MPS and are used as proof-of-concept and drug evaluation systems, and are attracting attention as an approach to addressing unmet medical needs. In conventional anti-cancer drug research, in vitro culture systems are mainly used to evaluate the growth inhibitory potential of cancer cell line monocultures. On the other hand, MPS has made it possible to monitor cancer pathology, malignant traits, and pharmacological activity, such as reproduction of the cancer niche, interactions between cancer cells and various stroma in the tumor microenvironment, cancer cell movement, and immune cell accumulation in cancer tissue. MPS is also used to evaluate safety and adverse effects and pharmacokinetics, which are essential for anticancer drug development. Various MPSs have been developed and reported for these purposes also in Japan, MPS technology is being developed, including for use in the regulatory process for non-clinical studies. Through these efforts, it is expected to lead to innovation in drug discovery in the field of oncology.