Electroacupuncture Attenuates Cyclophosphamide-Induced Bladder Pain by Restoring Autophagy in Spinal Inhibitory Interneurons.

Interstitial cystitis and bladder pain syndrome cause chronic pelvic pain and urinary problems that significantly impact quality of life. Researchers investigated whether electroacupuncture—a technique that delivers mild electrical stimulation through acupuncture needles—could relieve bladder pain and what changes occur in the nervous system. Using a rat model of bladder inflammation, scientists found that the condition caused increased pain sensitivity along with cellular damage and disrupted recycling processes (called autophagy) in nerve cells of the spinal cord. These changes were particularly noticeable in inhibitory neurons, which normally help control pain signals. When researchers applied electroacupuncture to specific points near the sacrum (lower back), they observed significant improvements. The treatment reduced pain sensitivity, decreased markers of cellular damage, improved the health of cellular energy factories (mitochondria), and restored normal cellular recycling processes in spinal neurons. These findings suggest electroacupuncture works not just by masking pain, but by helping repair underlying cellular dysfunction in the nervous system. For patients with interstitial cystitis or chronic bladder pain, this research provides scientific evidence that electroacupuncture may offer meaningful relief by addressing biological mechanisms that contribute to persistent pain. The study adds to growing evidence supporting acupuncture as a viable complementary treatment for bladder pain conditions. Patients interested in this approach should consult with a licensed acupuncturist experienced in treating pelvic pain conditions.

This preclinical study investigated electroacupuncture's mechanisms in cyclophosphamide-induced cystitis using rats and GAD67-GFP transgenic mice. CYP administration produced persistent mechanical hypersensitivity with concurrent spinal dorsal horn changes including elevated oxidative stress markers (8-OHdG), impaired autophagy (increased p62/SQSTM1, decreased Beclin-1, reduced LC3B conversion), and fewer neuronal autophagosomes. Pathological changes were prominent in GABAergic inhibitory interneurons. Sacral electroacupuncture significantly attenuated mechanical allodynia while partially normalizing oxidative damage markers, improving mitochondrial ultrastructure, reducing p62 accumulation, increasing Beclin-1 expression, enhancing LC3B-related indices, and restoring autophagosome formation. Methodology employed behavioral testing, Western blotting, immunofluorescence, and electron microscopy. Clinical implications suggest EA's analgesic efficacy in bladder pain syndrome may involve restoration of autophagy and reduction of oxidative stress in spinal inhibitory circuits, providing mechanistic rationale for sacral point selection in IC/BPS treatment protocols.