Ahmad NawazYes. But not just for sleep. The clock affects the
  way that RNA transcribes. It regulates many clocks in the body,
  including those for cell death (apostisis?). Without proper
  regulation of cell death, you get cancer. That's not to say this
  would SOLVE cancer; cancer has too much variety and is
  complicated for such a simple fix. But it's something that might
  be helpful in some limit...ed cases in a tiny way."