Acupuncture Upregulates hsa-miR-550a-3-5p Targeting PECAM1 To Reduce Transendothelial Migration of Inflammatory Cells and Alleviate Migraine.

Researchers have discovered how acupuncture may work at the molecular level to relieve migraines. This study examined blood samples from migraine patients before and after acupuncture treatment, combined with laboratory experiments and animal models. Scientists found that acupuncture increases levels of a specific molecule called hsa-miR-550a-3-5p in the bloodstream. This molecule acts like a biological switch, turning down the production of a protein called PECAM1 that helps inflammatory cells cross blood vessel walls into brain tissue. When PECAM1 levels decrease, fewer immune cells can migrate into areas where they contribute to migraine pain. The study showed this process reduces inflammatory chemicals like TNF-α, IL-1β, and IL-6, which are known to trigger migraine symptoms. Researchers confirmed these findings using mice with artificially induced migraines. Acupuncture relieved migraine-like behaviors in these animals, but when scientists blocked the hsa-miR-550a-3-5p molecule, acupuncture's benefits disappeared. This confirms the molecule plays a crucial role in acupuncture's pain-relieving effects. This research is significant because it provides concrete biological evidence explaining why acupuncture works for migraine relief, moving beyond simply observing that it helps. The findings suggest future treatments might be developed that mimic acupuncture's effects by targeting this specific molecular pathway. For patients considering acupuncture for migraines, this study adds to growing scientific evidence supporting its effectiveness as a treatment option. If you're interested in acupuncture for migraine management, consult with a licensed acupuncturist who has experience treating headache disorders.

This study elucidates acupuncture's molecular mechanism in migraine treatment through microRNA regulation. Using bioinformatics analysis of peripheral blood samples, researchers identified significant upregulation of hsa-miR-550a-3-5p following acupuncture treatment in migraine patients. Luciferase reporter assays confirmed this microRNA directly targets and suppresses PECAM1 (platelet endothelial cell adhesion molecule 1) expression. RT-qPCR, Western blot, and Transwell migration assays demonstrated that reduced PECAM1 decreases transendothelial migration of monocytes-macrophages and diminishes secretion of pro-inflammatory cytokines (TNF-α, IL-1β, IL-6). The mechanism involves promoting M2 macrophage polarization, reducing neuroinflammation. In nitroglycerin-induced migraine mouse models, acupuncture ameliorated migraine-like behaviors; administering miR-550a-3-5p inhibitor abolished therapeutic effects, confirming causality. Clinical implications: This research provides mechanistic evidence for acupuncture's anti-inflammatory effects in migraine prophylaxis and identifies potential biomarkers for treatment response monitoring. The miR-550a-3-5p/PECAM1 axis represents a novel therapeutic target for migraine management.