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Effect of the Electroacupuncture at ST36 in TMT-induced Memory Deficit Rats  

Shim, Hyun-Soo (Acupuncture and Meridian Science Research Center, Kyung Hee University)
Park, Hyun-Jung (Acupuncture and Meridian Science Research Center, Kyung Hee University)
Lee, Hye-Jung (Acupuncture and Meridian Science Research Center, Kyung Hee University)
Shim, In-Sop (Acupuncture and Meridian Science Research Center, Kyung Hee University)
Publication Information
Journal of Physiology & Pathology in Korean Medicine / v.25, no.4, 2011 , pp. 691-696 More about this Journal
Abstract
In order to the neuroprotective effect of electroacupuncture (EA), the present study examined the effects of electroacupuncture inacupoint ST36 (Stomach 36) on trimethyltin chloride (TMT)-induced cognitive impairments rat using the Morris water maze (MWM) task and immunohistochemistry staining. The rats were randomly divided into the following groups: naive rat (Normal), TMT injection rat (Control), TMT injection + EA treated rat inacupoint ST36 (ST36) and TMT injection + EA treated rat in non-acupoint, base of tail (Non-AC). Electroacupuncture (2Hz, 2mA, and 10 minutes)was applied either to the acupuncture point ST36 or the nonacupuncture point in the tail for the last 14 days. In the water maze test, the animals were trained to find a platform in a fixed position during 4d and then received 60s probe trial on the $5^{th}$ day following removal of platform from the pool. Rats with TMT injection showed impaired learning and memory of the tasks and treatment with EA in acupoint ST36 (P<0.05) produced a significant improvement in escape latency to find the platform after $2^{nd}$ day and retention trial in the Morris water maze. Consistent with behavioral data, treatment with EA in acupoint ST36 also significantly increased expression of Choline acetyltransferase (ChAT) and Acetylcholinesterase (AChE) immunoreactive neurons in the hippocampus compared to the Control group. These results demonstrated that EA in acupoint ST36 has a protective effect against TMT-induced neuronal and cognitive impairments. The present study suggests that EA in acupoint ST36 might be useful in the treatment of TMT-induced learning and memory deficit.
Keywords
ST36 (Stomach 36); Trimethyltin chloride (TMT); Morris water maze; Cholineacetyl transferase (ChAT); Acetylcholine esterase (AChE);
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