Abstract: Several gastrointestinal and gynecological malignancies have the potential to disseminate and grow in the peritoneal cavity. The occurrence of peritoneal carcinomatosis (PC) has been shown to significantly decrease overall survival in patients. Treatment of residual microscopic disease remains a challenge with new anticancer modalities development. Now, the inventors propose an innovative therapeutic management of peritoneal carcinomatosis (PC) that is bio-inspired and tumor-targeted by engineering MSC-derived EVs to encapsulate a photosensitizer (mTHPC) for improved photodynamic therapy efficiency and safety. In this work, the inventors first evaluated the biodistribution of EVs-mTHPC in a murine PC model and highlighted superior accumulation of mTHPC in the tumor compared to other mTHPC formulations (free drug and liposomal one (Foslip®). The effectiveness of PDT mediated by mTHPC vectorized in EVs has then been evaluated in PC.

Abstract: A fluidic system for loading a therapeutic or imaging agent into the lumen of extracellular vesicles from producer cells, including at least one container, a liquid medium contained in the container, producer cells, a liquid medium stirrer and a device for controlling the speed of the stirrer suitable for the growth of the producer cells, wherein it also includes a device for controlling the speed of the stirrer and the stirrer, of which the shape and dimensions of the container are suitable for generating a turbulent flow of the liquid medium in the container for exerting shear stresses on the producer cells in order to carry out the loading of a therapeutic or imaging agent into the lumen of the extracellular vesicles produced simultaneously by the fluidic system.