A renowned professor and researcher with the University of Illinois College of Medicine at Peoria has resigned his post. Doctor Jasti Rao resigned Monday morning due to health concerns. Doctor Rao headed the Cancer Research Center at U of I College of Medicine and was also a professor of cancer biology and neurosurgery. The College of Medicine Dean,Doctor Sara Rusch, says she will fill Doctor Rao’s roles until a replacement is found. Doctor Rao’s research efforts have led to a patented discovery of an anti-cancer treatment and more than $30 million in grant funding.