The needle pricks involved in acupuncture may help relieve pain by triggering a natural painkilling chemical called adenosine, a new study has found. The researchers also believe they can enhance acupuncture’s effectiveness by coupling the process with a well-known cancer drug — deoxycoformycin — that maintains adenosine levels longer than usual. “Acupuncture has been a mainstay of medical treatment in certain parts of the world for 4,000 years, but because it has not been understood completely, many people have remained skeptical,” lead author Dr. Maiken Nedergaard, co-director of the Center for Translational Neuromedicine at the University of Rochester Medical Center, said in a news release. “In this work, we provide information about one physical mechanism through which acupuncture reduces pain in the body.” – from US News & World Report