This study will determine the effectiveness of acupuncture versus a placebo in altering brain activity and relieving pain due to fibromyalgia.
Fibromyalgia is one of the most common rheumatic diseases, second only to osteoarthritis. It causes chronic muscle pain and fatigue. Acupuncture functions by targeting specific nerve pathways to different organs or parts of the body. Research has shown that acupuncture is effective in decreasing or eliminating people's sensitivity to pain in targeted regions. However, some believe that the reduction in pain is due to a placebo response rather than acupuncture itself. This study will use two brain-imaging techniques to determine the brain response to acupuncture versus a simulation of acupuncture, thereby assessing whether acupuncture is actually effective in relieving pain. Participants in this single-blind study will be randomly assigned to receive either acupuncture or a placebo treatment. The placebo will consist of a simulation of acupuncture. Functional magnetic resonance imaging (fMRI) and positron emission tomography (PET) will be used to assess activity of brain mu-opioid receptors. These receptors are involved in the body's ability to perceive pain. All participants will be scanned twice using the fMRI scanner, once before any treatment sessions and once at the conclusion of all treatment sessions. Both fMRI sessions will involve applying pressure to the thumb to elicit a response in the brain in order to assess the corresponding fMRI blood oxygen level dependent (BOLD) signal and whether this activation changes after treatment intervention. Participants will then receive nine treatments of acupuncture or placebo outside the scanner over a 4-week period. The PET portion of this study is optional, and, if you elect to participate, your first treatment session will be performed in the PET scanner. After this first session, participants will have seven additional treatment sessions outside of the scanner over a 4-week period. The last session will be performed in the PET scanner to assess changes in mu-opioid receptor activity that may have occurred over the 4 weeks. A baseline visit to determine eligibility and a close-out visit at week 8 are also part of the participation schedule. It is very important that participants live within driving distance of Ann Arbor, MI due to the significant number of visits to our Center.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
46
Involves the insertion and manual stimulation of thin acupuncture needles into specific points in the body. Fibromyalgia participants will be randomized to receive 9 acupuncture treatments over the course of four weeks. All participants will be scanned twice using the fMRI scanner. The PET portion of the study is optional.
Fibromyalgia participants will be randomized to receive 9 sham treatments over the course of four weeks. All participants will be scanned twice using the fMRI scanner. The PET portion of the study is optional.
University of Michigan
Ann Arbor, Michigan, United States
Change in Mu-opioid Receptor Occupancy
Here we report the change (post - pre) in mu-opioid receptor binding potential (BP) for the perigenual anterior cingulate. BP is a unitless measure and reflects the total maximum binding of receptors divided by the dissociation constant. BP = Bmax/Kd.
Time frame: measured from baseline to week 5
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