Provided herein are anti-inflammatory peptide amphiphiles (AIF-PAs) and methods of use thereof. In particular, nanofiber of AIF-PAs are provided and methods of use thereof in the treatment of inflammatory bowel diseases (e.g., Crohn's disease).

Various embodiments disclosed relate to drug-coated balloon catheters for treating, preventing, or reducing the recurrence of a stricture and/or cancer, or for treating benign prostatic hyperplasia (BPH), in a non-vascular body lumen and methods of using the same. A drug-coated balloon catheter for delivering a therapeutic agent to a target site of a body lumen stricture includes an elongated balloon having a main diameter. The balloon catheter includes a coating layer overlying an exterior surface of the balloon. The coating layer includes one or more water-soluble additives and an initial drug load of a therapeutic agent. In some embodiments, the balloon catheter includes a length-control mechanism which stretches and elongates the balloon when it is in a deflated state, giving the balloon a smaller cross-sectional deflated profile for tracking through the body lumen and for removal after treatment.

Systems, devices, and related methods for delivering substances to a target treatment site within a subject (e.g., patient) are described. The medical device includes a shaft including a plurality of lumens, each of the plurality of lumens including an inlet at a proximal portion of the shaft and an outlet at a distal portion of the shaft. A mixer assembly is disposed in the distal portion of the shaft and in fluid communication with the plurality of lumens. The mixer assembly includes a mixing chamber configured to receive a plurality of substances from the plurality of lumens, a piston movably disposed in the mixing chamber, and a driver operably coupled to the piston. The driver is configured to drive the piston relative to the shaft within the mixing chamber, and in turn expel the plurality of substances from the mixing chamber.

A device can include a capsule containing an array of microneedles and a mechanical actuator. The device can be in an ingestible form for delivery to a duodenum or other target location within a subject and can release the mechanical actuator from constraint by the capsule in response to stimuli or conditions in or en route to the duodenum or other target location. The mechanical actuator upon release from constraint by the capsule can expand outwardly (e.g., responsive to a bias provided by a flexibly resilient material of the mechanical actuator) in a direction away from a central longitudinal axis of the mechanical actuator and drive the array of microneedles into penetrating engagement with a lining of the duodenum or other target location. The penetrating engagement can facilitate delivery of a biotherapeutic agent or other payload via the microneedles.

A device can include a capsule containing an array of microneedles and a mechanical actuator. The device can be in an ingestible form for delivery to a duodenum or other target location within a subject and can release a first shell portion and a second shell portion of the capsule from one another in response to stimuli or conditions in or en route to the duodenum or other target location. The launcher can drive the released first shell portion and the second shell portion away from one another to expose the array of microneedles in a position for achieving penetrating engagement with a lining of the duodenum or other target location. The penetrating engagement can facilitate delivery of a biotherapeutic agent or other payload via the microneedles.

The present disclosure provides a plastic stent includes a front end portion formed in a tube shape and having an inlet formed on one end; a central portion extending integrally from one end of the front end portion; and a rear end portion extending integrally from the other end of the central portion and having an outlet formed at an end of a flow path communicating with the inlet, wherein the front end portion and the rear end portion provide different restoring angles or restoring forces relative to the central portion.

A method for performing a medical procedure in an intestine of a patient is provided. The method comprises providing a system comprising: a catheter for insertion into the intestine, the catheter comprising: an elongate shaft comprising a distal portion; and a functional assembly positioned on the shaft distal portion and comprising at least one treatment element. The catheter is introduced into the patient, and target tissue is treated with the at least one treatment element. The target tissue comprises mucosal tissue of the small intestine, and the medical procedure can be configured to treat polycystic ovarian syndrome (PCOS).