Device and Cells (IMAGE) Johns Hopkins University Caption Johns Hopkins undergraduates developed a device, at right, to anchor therapeutic cells within a blood vessel, where they can release insulin and other proteins. The cells live within protective microcapsules, of the sort seen floating in the vial at left. Credit Will Kirk/JHU Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.