[Mechanism of electroacupuncture in alleviating learning and memory impairment in rats with post-stroke cognitive impairment by regulating the IRS-1/PI3K/AKT signaling pathway and glucose transporters].

Researchers in China investigated how electroacupuncture might help restore memory and learning abilities after stroke. The study used rats that had experienced stroke-like brain injuries, which often lead to cognitive problems similar to those seen in human stroke survivors. Scientists treated some rats with electroacupuncture at two specific points on the head called Shenting (GV24) and Baihui (GV20) for 30 minutes daily over two weeks. They compared these rats to untreated rats and those given standard medication (donepezil). The results showed that electroacupuncture significantly improved learning and memory function in the stroke-affected rats. Brain tissue analysis revealed that the treatment worked by activating a specific cellular pathway called IRS-1/PI3K/AKT, which helps brain cells better utilize glucose for energy. Stroke often causes insulin resistance in brain tissue, making it harder for neurons to get the fuel they need. The electroacupuncture treatment increased levels of glucose transporters (GLUT1 and GLUT3) in the hippocampus, the brain's memory center, allowing neurons to absorb more glucose. The treatment also reduced brain damage and improved the physical appearance of brain cells under microscopic examination. These findings suggest that electroacupuncture may help stroke survivors recover cognitive function by enhancing the brain's ability to process energy efficiently. If you're considering acupuncture for post-stroke cognitive recovery, consult with a licensed acupuncturist experienced in neurological conditions.

This animal study (n=15 per group) examined electroacupuncture's effects on post-stroke cognitive impairment using MCAO/R rat models. Daily 30-minute EA treatments at GV24 and GV20 for 14 days significantly improved neurological deficit scores, novel object recognition, and reduced cerebral infarct volume compared to untreated controls (P<0.01). Mechanistically, EA activated the IRS-1/PI3K/AKT signaling pathway, reversing stroke-induced insulin resistance in hippocampal tissue. Treatment upregulated phosphorylated PI3K and AKT ratios, increased GLUT1 and GLUT3 protein expression, and elevated hippocampal glucose content (P<0.01). Histological analysis showed improved neuronal morphology with organized cell arrangement. When pathway inhibitor LY294002 was administered, EA's therapeutic effects were significantly attenuated (P<0.05), confirming pathway specificity. Results were comparable to donepezil treatment. Clinical implication: EA at GV24 and GV20 may improve post-stroke cognitive function by enhancing neuronal glucose metabolism through IRS-1/PI3K/AKT pathway activation.