Houston-based Nanospectra Biosciences Inc. has kicked off a pivotal U.S. study of its Aurolase therapy in the targeted destruction of prostate tumors using nanomedicine technology. The IDE study, with an estimated completion date of December 2022, will support a de novo 510(k) submission to the U.S. FDA. The first two patients were treated at the University of Michigan, which also participated in the first-in-human pilot study of Aurolase.