Toward In Vivo Disease Diagnosis and Treatment Using DNA

We propose a technique to diagnose and treat individual cells in the human body. A virus-like system delivers a copy of a diagnosis and treatment DNA complex to each cell. The complex determines whether the cell has a specific disease based on the presence or absence of indicator mRNA molecules and, if the diagnosis is positive, releases a proper drug for treatment. As a tool for the diagnosis and treatment system, we develop a DNA implementation of an arbitrary finite state machine.