Key Finding
Acupuncture at GV20 and GV14 reduced stroke-induced brain damage by modulating the p38 MAPK/MSK1 pathway, shifting astrocytes from inflammatory A1 to neuroprotective A2 phenotype while decreasing infarct volume and inflammatory markers.
Researchers investigated how acupuncture might protect the brain after a stroke by studying rats with induced stroke injuries. Strokes occur when blood flow to the brain is blocked and then restored, causing inflammation and brain damage. The study used advanced genetic analysis techniques along with brain imaging to understand what happens at the cellular level.
The research team applied acupuncture at two specific points—Baihui (GV20) on the top of the head and Dazhui (GV14) on the upper back—daily for seven days after inducing stroke-like injuries in laboratory rats. They measured brain damage, inflammation markers in the blood, and examined changes in brain cells called astrocytes, which can either promote inflammation (harmful A1 type) or support healing (beneficial A2 type).
The findings showed that acupuncture significantly reduced brain damage and improved neurological function after stroke. The treatment worked by influencing a specific cellular pathway called p38 MAPK/MSK1, which controls how astrocytes behave. Acupuncture helped shift astrocytes from the harmful inflammatory state to the healing state, reducing inflammatory chemicals in the blood and decreasing the size of damaged brain tissue.
For patients who have experienced stroke or are at risk, this research provides scientific evidence for how acupuncture may support recovery. The study suggests acupuncture helps reduce brain inflammation and promotes repair processes at the cellular level. While this was an animal study, it offers promising insights into acupuncture's protective mechanisms for stroke patients. Anyone considering acupuncture for stroke recovery should consult with a licensed acupuncturist experienced in neurological conditions.
This preclinical study investigated acupuncture's neuroprotective effects in middle cerebral artery occlusion (MCAO)-induced cerebral ischemia-reperfusion injury using transcriptome and single-cell sequencing analysis. Rats received acupuncture at GV20 and GV14 daily for 7 days post-MCAO. Assessment included TTC staining, T2-weighted MRI for infarct volume, ELISA for serum inflammatory cytokines (IL-1β, IL-6, TNF-α), and Western blotting plus immunohistochemistry for astrocyte polarization markers and p38 MAPK/MSK1 pathway components.
Results demonstrated acupuncture inhibited p38 MAPK phosphorylation while upregulating MSK1 expression, promoting astrocyte polarization from pro-inflammatory A1 phenotype (decreased GFAP and C3 expression) to neuroprotective A2 phenotype (increased S100A10 expression). This shift corresponded with reduced pro-inflammatory cytokines, decreased infarct volume, and improved neurological function.
Clinical relevance: The study elucidates a specific molecular mechanism—p38 MAPK/MSK1 pathway modulation—through which acupuncture at GV20 and GV14 may reduce neuroinflammation and promote neural repair in ischemic stroke, supporting evidence-based point selection for stroke rehabilitation protocols.
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