GABRB3 Gene Polymorphisms Influences the Analgesic Response to Acupuncture Treatment in Patients With Chronic Knee Pain: A Randomized Controlled Neuroimaging Transcriptomics Study.

Researchers have discovered that genetics may help explain why acupuncture works better for some people with chronic knee pain than others. This study followed 180 patients with knee osteoarthritis, a common condition causing chronic knee pain. Participants received either real acupuncture, sham acupuncture, medication (celecoxib), placebo pills, or no treatment over two weeks.

The research team examined genetic variations in four different genes and found that one specific gene called GABRB3 played a significant role. Patients carrying certain versions of this gene (AG or GG variations at a location called rs4906902) responded much better to acupuncture treatment for pain relief. These same patients showed differences in their brain structure—specifically, they had less gray matter volume in areas of the brain involved in processing pain, including the caudate, putamen, and ventral striatum. Brain tissue analysis revealed that the GABRB3 gene was more active in these regions.

What does this mean for patients? This discovery suggests that acupuncture's pain-relieving effects may work through specific biological pathways related to GABA, a chemical messenger in the brain. In the future, genetic testing might help predict which patients are most likely to benefit from acupuncture for chronic knee pain. While this research is promising, it's important to note that the study couldn't distinguish between real and sham acupuncture in terms of overall effectiveness, though the genetic association was only found in those receiving acupuncture treatments. If you're considering acupuncture for knee pain, consult with a licensed acupuncturist who can evaluate your individual situation.

This randomized controlled trial (n=180) investigated genetic predictors of acupuncture analgesia in knee osteoarthritis patients using neuroimaging and transcriptomics. Participants were allocated to verum acupuncture, sham acupuncture, celecoxib, placebo, or waiting list groups, receiving 10 sessions over 2 weeks. While no significant difference emerged between verum and sham acupuncture in primary outcomes (VAS, WOMAC), genotyping revealed that GABRB3 rs4906902 polymorphism significantly predicted acupuncture response. Patients carrying AG/GG genotypes demonstrated superior analgesic outcomes compared to AA carriers (p<0.05). Voxel-based morphometry showed AG/GG carriers had reduced gray matter volume in striatal regions (caudate head, putamen, ventral striatum), correlating with elevated GABRB3 expression via Allen Brain Atlas analysis. Other candidate genes (OPRM1, COMT, BDNF) showed no correlation. Clinical implications suggest GABRB3 polymorphisms may serve as biomarkers for identifying acupuncture responders in chronic knee pain, potentially through GABAergic modulation of pain-processing circuits. Further validation studies are warranted given the lack of verum-sham differentiation.