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[Effects and mechanisms of different frequencies of electroacupuncture for learning and memory ability of Alzheimer's rats].
Zhongguo Zhen Jiu. 2017 Jun 12; 37(6):629-636.ZZ

Abstract

OBJECTIVE

To observe the effects of different frequencies of electroacupuncture (EA) at "Baihui (GV 20)" and "Shenshu(BL 23)" for the learning and memory ability as well as glycogen synthase kinase-3β (GSK-3β) and growth associated protein-43 (GAP-43) in hippocampal tissue of rats with Alzheimer's disease(AD), so as to explore the mechanism of different frequencies of EA for the prevention and treatment of AD.

METHODS

One hundred and twelve healthy Wistar male rats were divided into seven groups by random number table, namely a normal group, a sham operation group, a model group, an acupuncture group, a 2 Hz EA group, a 30 Hz EA group, and a 50 Hz EA group, 16 rats in each one. The rats in the normal group were conventionally raised in the laboratory without any treatment. 0.9% NaCl solution was injected into bilateral dentate convolution of hippocampus in rats of the sham operation group. AD model was established by β-amyloid protein1-42 (Aβ1-42) injected into bilateral dentate convolution of hippocampus in the other groups. 15 days after establishment, no treatment was applied in the model and sham operation groups, and EA with corresponding frequencies at "Baihui (GV 20)" and "Shenshu (BL 23)" was used in the three EA groups for 2 sessions, once a day and 7 times as one session. There was 1 day between the two sessions. The same acupoints were adopted in the acupuncture group, without electrical connection. The escape latency, the first spanning platform time, and the number of crossing platform were tested in the Morris water maze immediately after treatment. The expressions of GSK-3β and GAP-43 were examined by immunohistochemistry and Western blot.

RESULTS

①Morris water maze tests showed that the escape latency and the first spanning platform time significantly increased in the model group compared with those in the normal group (both P<0.01), and the number of crossing platform decreased (P<0.01). Compared with the model group, the escape latency and the first spanning platform times decreased in the acupuncture and three EA groups (all P<0.01), and the numbers of crossing platform increased (P<0.01). Compared with the acupuncture and 2 Hz, 30 Hz EA groups, the escape latency decreased in the 50 Hz EA group (P<0.01, P<0.05); the first spanning platform time reduced (all P<0.01); the number of crossing platform increased (P<0.01, P<0.05). ②The expressions of GSK-3β and GAP-43 of the model group increased compared with those of the normal group(both P<0.01). The expressions of GSK-3β in the acupuncture and three EA groups decreased compared with that in the model group (all P<0.01), and the expressions of GAP-43 increased (all P<0.01). The expressions of GSK-3β decreased and GAP-43 increases in the 50 Hz EA group compared with those in the acupuncture group and 2 Hz, 30 Hz groups (all P<0.01).

CONCLUSIONS

EA may promote synaptic damage rehabilitation by down regulating GSK-3β and up regulating GAP-43 to improve learning and memory ability of AD rats. The effect of 50 Hz EA is better than those of 30 Hz and 2 Hz EA and acupuncture.

Authors+Show Affiliations

Hubei University of CM, Wuhan 430061, China.College of Acupuncture and Orthopedics, Hubei University of CM, Wuhan 430061.Hubei University of CM, Wuhan 430061, China.Hubei University of CM, Wuhan 430061, China.College of Acupuncture and Orthopedics, Hubei University of CM, Wuhan 430061.College of Acupuncture and Orthopedics, Hubei University of CM, Wuhan 430061.College of Acupuncture and Orthopedics, Hubei University of CM, Wuhan 430061.College of Acupuncture and Orthopedics, Hubei University of CM, Wuhan 430061.

Pub Type(s)

Journal Article

Language

chi

PubMed ID

29231506

Citation

Wang, Ying, et al. "[Effects and Mechanisms of Different Frequencies of Electroacupuncture for Learning and Memory Ability of Alzheimer's Rats]." Zhongguo Zhen Jiu = Chinese Acupuncture & Moxibustion, vol. 37, no. 6, 2017, pp. 629-636.
Wang Y, Kong L, Li W, et al. [Effects and mechanisms of different frequencies of electroacupuncture for learning and memory ability of Alzheimer's rats]. Zhongguo Zhen Jiu. 2017;37(6):629-636.
Wang, Y., Kong, L., Li, W., Zhang, K., Shen, F., Wang, Y., Zhou, H., & Sun, G. (2017). [Effects and mechanisms of different frequencies of electroacupuncture for learning and memory ability of Alzheimer's rats]. Zhongguo Zhen Jiu = Chinese Acupuncture & Moxibustion, 37(6), 629-636. https://doi.org/10.13703/j.0255-2930.2017.06.016
Wang Y, et al. [Effects and Mechanisms of Different Frequencies of Electroacupuncture for Learning and Memory Ability of Alzheimer's Rats]. Zhongguo Zhen Jiu. 2017 Jun 12;37(6):629-636. PubMed PMID: 29231506.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Effects and mechanisms of different frequencies of electroacupuncture for learning and memory ability of Alzheimer's rats]. AU - Wang,Ying, AU - Kong,Lihong, AU - Li,Wei, AU - Zhang,Kangkang, AU - Shen,Feng, AU - Wang,Yawen, AU - Zhou,Hua, AU - Sun,Guojie, PY - 2017/12/13/entrez PY - 2017/12/13/pubmed PY - 2018/6/28/medline KW - Alzheimer's disease KW - electroacupuncture, frequency KW - glycogen synthase kinase-3β (GSK-3β) KW - growth associated protein-43 (GAP-43) KW - learning and memory ability SP - 629 EP - 636 JF - Zhongguo zhen jiu = Chinese acupuncture & moxibustion JO - Zhongguo Zhen Jiu VL - 37 IS - 6 N2 - OBJECTIVE: To observe the effects of different frequencies of electroacupuncture (EA) at "Baihui (GV 20)" and "Shenshu(BL 23)" for the learning and memory ability as well as glycogen synthase kinase-3β (GSK-3β) and growth associated protein-43 (GAP-43) in hippocampal tissue of rats with Alzheimer's disease(AD), so as to explore the mechanism of different frequencies of EA for the prevention and treatment of AD. METHODS: One hundred and twelve healthy Wistar male rats were divided into seven groups by random number table, namely a normal group, a sham operation group, a model group, an acupuncture group, a 2 Hz EA group, a 30 Hz EA group, and a 50 Hz EA group, 16 rats in each one. The rats in the normal group were conventionally raised in the laboratory without any treatment. 0.9% NaCl solution was injected into bilateral dentate convolution of hippocampus in rats of the sham operation group. AD model was established by β-amyloid protein1-42 (Aβ1-42) injected into bilateral dentate convolution of hippocampus in the other groups. 15 days after establishment, no treatment was applied in the model and sham operation groups, and EA with corresponding frequencies at "Baihui (GV 20)" and "Shenshu (BL 23)" was used in the three EA groups for 2 sessions, once a day and 7 times as one session. There was 1 day between the two sessions. The same acupoints were adopted in the acupuncture group, without electrical connection. The escape latency, the first spanning platform time, and the number of crossing platform were tested in the Morris water maze immediately after treatment. The expressions of GSK-3β and GAP-43 were examined by immunohistochemistry and Western blot. RESULTS: ①Morris water maze tests showed that the escape latency and the first spanning platform time significantly increased in the model group compared with those in the normal group (both P<0.01), and the number of crossing platform decreased (P<0.01). Compared with the model group, the escape latency and the first spanning platform times decreased in the acupuncture and three EA groups (all P<0.01), and the numbers of crossing platform increased (P<0.01). Compared with the acupuncture and 2 Hz, 30 Hz EA groups, the escape latency decreased in the 50 Hz EA group (P<0.01, P<0.05); the first spanning platform time reduced (all P<0.01); the number of crossing platform increased (P<0.01, P<0.05). ②The expressions of GSK-3β and GAP-43 of the model group increased compared with those of the normal group(both P<0.01). The expressions of GSK-3β in the acupuncture and three EA groups decreased compared with that in the model group (all P<0.01), and the expressions of GAP-43 increased (all P<0.01). The expressions of GSK-3β decreased and GAP-43 increases in the 50 Hz EA group compared with those in the acupuncture group and 2 Hz, 30 Hz groups (all P<0.01). CONCLUSIONS: EA may promote synaptic damage rehabilitation by down regulating GSK-3β and up regulating GAP-43 to improve learning and memory ability of AD rats. The effect of 50 Hz EA is better than those of 30 Hz and 2 Hz EA and acupuncture. SN - 0255-2930 UR - https://www.unboundmedicine.com/medline/citation/29231506/[Effects_and_mechanisms_of_different_frequencies_of_electroacupuncture_for_learning_and_memory_ability_of_Alzheimer's_rats]_ L2 - https://medlineplus.gov/alzheimersdisease.html DB - PRIME DP - Unbound Medicine ER -