A new study gives Western scientists new insights on how acupuncture relieves pain.
University of Rochester Medical Center scientists identified the molecule adenosine as a key influence for some of the effects of acupuncture in the body.
Upon this knowledge, scientists were able to triple the beneficial effects of acupuncture in mice by adding a medication approved to treat leukemia in people.
The paper is published in the journal Nature Neuroscience.
But adenosine also acts as a natural painkiller, becoming active in the skin after an injury to inhibit nerve signals and ease pain in a way similar to lidocaine.
In the current study, scientists found that the chemical is also very active in deeper tissues affected by acupuncture. The Rochester researchers looked at the effects of acupuncture on the peripheral nervous system – the nerves in our body that aren’t part of the brain and spinal cord.
The research complements a rich, established body of work showing that in the central nervous system, acupuncture creates signals that cause the brain to churn out natural pain-killing endorphins.
The new findings add to the scientific heft underlying acupuncture, said neuroscientist Maiken Nedergaard, M.D., D.M.Sc., who led the research. Her team is presenting the work this week at a scientific meeting, Purines 2010, in Barcelona, Spain.
“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,” said Nedergaard, co-director of the University’s Center for Translational Neuromedicine, where the research was conducted.
“In this work, we provide information about one physical mechanism through which acupuncture reduces pain in the body,” she added.
Once scientists recognized adenosine’s role, the team explored the effects of a cancer drug called deoxycoformycin, which makes it harder for the tissue to remove adenosine. The compound boosted the effects of acupuncture treatment dramatically, nearly tripling the accumulation of adenosine in the muscles and more than tripling the length of time the treatment was effective.
“It’s clear that acupuncture may activate a number of different mechanisms,” said Josephine P. Briggs, M.D., director of the National Center for Complementary and Alternative Medicine at the National Institutes of Health.
“This carefully performed study identifies adenosine as a new player in the process. It’s an interesting contribution to our growing understanding of the complex intervention which is acupuncture,” added Briggs.
Source: University of Rochester