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Article

Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia

  • Authors:
    • Yanfeng Zhang
    • Yong Yang
    • Ruping Dai
    • Hui Wu
    • Changqi Li
    • Qulian Guo
  • View Affiliations / Copyright

    Affiliations: Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China, Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China, Department of Medical Oncology, Hunan Provincial Tumor Hospital, The Affiliated Tumor Hospital, Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, P.R. China, Department of Anatomy and Neurobiology, Xiangya School of Medicine, Central South University, Changsha, Hunan 410078, P.R. China
  • Pages: 1351-1356
    |
    Published online on: February 11, 2015
       https://doi.org/10.3892/etm.2015.2285
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Abstract

Oxytocin (OT) neurons localized in the paraventricular nucleus (PVN) and supraoptic nucleus (SON) send fibers to the brain and spinal cord. While most previous studies have looked at the role of OT in chronic pain, few have investigated the role of OT in acute pain, particularly postoperative pain. In the present study, the role of OT in incision‑induced allodynia was explored for the first time, using a rat incisional pain model. Immunohistochemical staining showed that, compared with the baseline (prior to incision) measurements, the OT content in the PVN was significantly decreased at 0.5, 1.0 and 3.0 h post‑incision and returned to the baseline level at 6.0 h post‑incision. By contrast, there was no significant difference in the OT content in the SON prior to and subsequent to incision. A dose‑dependent inhibition of mechanical hypersensitivity was detected 30 min after intracerebroventricular injection of OT (100, 400 or 600 ng) and lasted for 3.0 h. No significant difference was noted, however, between the intrathecal OT injection group (600 ng) and the control group. In conclusion, the present study provides the first in vivo evidence that OT in the PVN predominantly attenuates incision‑induced mechanical allodynia at the supraspinal, rather than the spinal, level. This suggests that OT is involved in supraspinal analgesia for postoperative pain.
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Copy and paste a formatted citation
Spandidos Publications style
Zhang Y, Yang Y, Dai R, Wu H, Li C and Guo Q: Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia. Exp Ther Med 9: 1351-1356, 2015.
APA
Zhang, Y., Yang, Y., Dai, R., Wu, H., Li, C., & Guo, Q. (2015). Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia. Experimental and Therapeutic Medicine, 9, 1351-1356. https://doi.org/10.3892/etm.2015.2285
MLA
Zhang, Y., Yang, Y., Dai, R., Wu, H., Li, C., Guo, Q."Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia". Experimental and Therapeutic Medicine 9.4 (2015): 1351-1356.
Chicago
Zhang, Y., Yang, Y., Dai, R., Wu, H., Li, C., Guo, Q."Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia". Experimental and Therapeutic Medicine 9, no. 4 (2015): 1351-1356. https://doi.org/10.3892/etm.2015.2285
Copy and paste a formatted citation
x
Spandidos Publications style
Zhang Y, Yang Y, Dai R, Wu H, Li C and Guo Q: Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia. Exp Ther Med 9: 1351-1356, 2015.
APA
Zhang, Y., Yang, Y., Dai, R., Wu, H., Li, C., & Guo, Q. (2015). Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia. Experimental and Therapeutic Medicine, 9, 1351-1356. https://doi.org/10.3892/etm.2015.2285
MLA
Zhang, Y., Yang, Y., Dai, R., Wu, H., Li, C., Guo, Q."Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia". Experimental and Therapeutic Medicine 9.4 (2015): 1351-1356.
Chicago
Zhang, Y., Yang, Y., Dai, R., Wu, H., Li, C., Guo, Q."Oxytocin in the paraventricular nucleus attenuates incision-induced mechanical allodynia". Experimental and Therapeutic Medicine 9, no. 4 (2015): 1351-1356. https://doi.org/10.3892/etm.2015.2285
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