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[Effects of electroacupuncture at different acupoints on the pain behavior and NMDA receptor 2 B subunit mRNA and protein expression and phosphorylation level in the cervical spinal cord in rats with thyroid regional pain].
Zhen Ci Yan Jiu. 2009 Dec; 34(6):376-82.ZC

Abstract

OBJECTIVE

To observe the effect of electroacupuncture (EA) of different acupoint groups on the expression of NR 2 B subunit of N-methyl-D-aspartate (NMDA) receptor in the cervical spinal cord in rats with thyroid regional pain so as to analyze the analgesic mechanism of acupuncture for performing thyroid surgery.

METHODS

A total of 50 Wistar rats were randomized into control, model, EA-Futu (ST 32), EA-Hegu (LI 4)-Neiguan (PC 6, EA-LI 4-PC 6), EA-Zusanli (ST 36)-Yanglingquan (GB 34, EA-ST 36-GB 34) groups, with 10 cases in each. Thyroid regional pain model was established by subcutaneous injection of 2.5% formaldehyde. Ten minutes after modeling, EA (2 Hz/100 Hz, 1 mA) was applied to ST 32, LI 4-PC 6 and ST 36-GB 34 for 30 min respectively. The animals' face-grooming (FG) times and paw withdrawal latency (PWL) of radiant heat irradiation were recorded. The spinal cord tissues of the cervical 1-3 segments were removed for detecting the expression of NR 2 B mRNA and protein of NMDA receptor with reversed transcription-polymerase chain reaction and Western blotting techniques separately.

RESULTS

After subcutaneous injection of 2.5% formaldehyde, the animals' FG times increased considerably and the PWL was shortened obviously (P<0.05). Compared with model group, the FG times of EA-ST 32 and EA-LI 4-PC 6 groups at 40-45 min and 70-75 min after modeling decreased significantly, and their PWL prolonged markedly (P<0.05). The effect of EA-ST 32 was apparently superior to that of EA-LI 4-PC 6 group in reducing FG times. No significant differences were found between EA-ST 32 and EA-LI 4-PC 6 groups in PWL, and between model and EA-ST 36-GB 34 groups (P>0.05). Results of NR 2 B mRNA and protein detections showed no significant differences among the 5 groups in their expression (P>0.05). Comparison of the phosphorylated NR 2 B among 5 groups showed that EA-ST 32 and EA-LI 4-PC 6 could effectively down-regulate 2.5% formaldehyde induced increase of NR 2 B phosphorylation levels (P<0.05), while EA-ST 36-GB 34 had no obvious effect on it (P>0.05).

CONCLUSION

Both EA-ST 32 and EA-LI 4-PC 6 can significantly suppress thyroid regional pain induced behavior reactions, which may be closely associated with their effects in down-regulating NR 2 B phosphorylated level. The analgesic effect of EA-ST 32 and EA-LI 4-PC 6 for thyroid surgery is relatively more effective in comparison with EA-ST 36-GB 34.

Authors+Show Affiliations

Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China. gaoyonghui_2000@yahoo.com.cnNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

English Abstract
Journal Article
Research Support, Non-U.S. Gov't

Language

chi

PubMed ID

20209972

Citation

Gao, Yong-Hui, et al. "[Effects of Electroacupuncture at Different Acupoints On the Pain Behavior and NMDA Receptor 2 B Subunit mRNA and Protein Expression and Phosphorylation Level in the Cervical Spinal Cord in Rats With Thyroid Regional Pain]." Zhen Ci Yan Jiu = Acupuncture Research, vol. 34, no. 6, 2009, pp. 376-82.
Gao YH, Chen SP, Wang JY, et al. [Effects of electroacupuncture at different acupoints on the pain behavior and NMDA receptor 2 B subunit mRNA and protein expression and phosphorylation level in the cervical spinal cord in rats with thyroid regional pain]. Zhen Ci Yan Jiu. 2009;34(6):376-82.
Gao, Y. H., Chen, S. P., Wang, J. Y., Qiao, L. N., Xu, Q. L., & Liu, J. L. (2009). [Effects of electroacupuncture at different acupoints on the pain behavior and NMDA receptor 2 B subunit mRNA and protein expression and phosphorylation level in the cervical spinal cord in rats with thyroid regional pain]. Zhen Ci Yan Jiu = Acupuncture Research, 34(6), 376-82.
Gao YH, et al. [Effects of Electroacupuncture at Different Acupoints On the Pain Behavior and NMDA Receptor 2 B Subunit mRNA and Protein Expression and Phosphorylation Level in the Cervical Spinal Cord in Rats With Thyroid Regional Pain]. Zhen Ci Yan Jiu. 2009;34(6):376-82. PubMed PMID: 20209972.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Effects of electroacupuncture at different acupoints on the pain behavior and NMDA receptor 2 B subunit mRNA and protein expression and phosphorylation level in the cervical spinal cord in rats with thyroid regional pain]. AU - Gao,Yong-Hui, AU - Chen,Shu-Ping, AU - Wang,Jun-Ying, AU - Qiao,Li-Na, AU - Xu,Qiu-Ling, AU - Liu,Jun-ling, PY - 2010/3/10/entrez PY - 2010/3/10/pubmed PY - 2010/3/31/medline SP - 376 EP - 82 JF - Zhen ci yan jiu = Acupuncture research JO - Zhen Ci Yan Jiu VL - 34 IS - 6 N2 - OBJECTIVE: To observe the effect of electroacupuncture (EA) of different acupoint groups on the expression of NR 2 B subunit of N-methyl-D-aspartate (NMDA) receptor in the cervical spinal cord in rats with thyroid regional pain so as to analyze the analgesic mechanism of acupuncture for performing thyroid surgery. METHODS: A total of 50 Wistar rats were randomized into control, model, EA-Futu (ST 32), EA-Hegu (LI 4)-Neiguan (PC 6, EA-LI 4-PC 6), EA-Zusanli (ST 36)-Yanglingquan (GB 34, EA-ST 36-GB 34) groups, with 10 cases in each. Thyroid regional pain model was established by subcutaneous injection of 2.5% formaldehyde. Ten minutes after modeling, EA (2 Hz/100 Hz, 1 mA) was applied to ST 32, LI 4-PC 6 and ST 36-GB 34 for 30 min respectively. The animals' face-grooming (FG) times and paw withdrawal latency (PWL) of radiant heat irradiation were recorded. The spinal cord tissues of the cervical 1-3 segments were removed for detecting the expression of NR 2 B mRNA and protein of NMDA receptor with reversed transcription-polymerase chain reaction and Western blotting techniques separately. RESULTS: After subcutaneous injection of 2.5% formaldehyde, the animals' FG times increased considerably and the PWL was shortened obviously (P<0.05). Compared with model group, the FG times of EA-ST 32 and EA-LI 4-PC 6 groups at 40-45 min and 70-75 min after modeling decreased significantly, and their PWL prolonged markedly (P<0.05). The effect of EA-ST 32 was apparently superior to that of EA-LI 4-PC 6 group in reducing FG times. No significant differences were found between EA-ST 32 and EA-LI 4-PC 6 groups in PWL, and between model and EA-ST 36-GB 34 groups (P>0.05). Results of NR 2 B mRNA and protein detections showed no significant differences among the 5 groups in their expression (P>0.05). Comparison of the phosphorylated NR 2 B among 5 groups showed that EA-ST 32 and EA-LI 4-PC 6 could effectively down-regulate 2.5% formaldehyde induced increase of NR 2 B phosphorylation levels (P<0.05), while EA-ST 36-GB 34 had no obvious effect on it (P>0.05). CONCLUSION: Both EA-ST 32 and EA-LI 4-PC 6 can significantly suppress thyroid regional pain induced behavior reactions, which may be closely associated with their effects in down-regulating NR 2 B phosphorylated level. The analgesic effect of EA-ST 32 and EA-LI 4-PC 6 for thyroid surgery is relatively more effective in comparison with EA-ST 36-GB 34. SN - 1000-0607 UR - https://www.unboundmedicine.com/medline/citation/20209972/[Effects_of_electroacupuncture_at_different_acupoints_on_the_pain_behavior_and_NMDA_receptor_2_B_subunit_mRNA_and_protein_expression_and_phosphorylation_level_in_the_cervical_spinal_cord_in_rats_with_thyroid_regional_pain]_ L2 - https://medlineplus.gov/nondrugpainmanagement.html DB - PRIME DP - Unbound Medicine ER -