Search JIM Advanced Search

Journal of Integrative Medicine ›› 2020, Vol. 18 ›› Issue (2): 174-180.doi: 10.1016/j.joim.2020.01.002

• Original Experimental Research • Previous Articles     Next Articles

Effects of the plant-derived analgesic compounds sinomenine and salvinorin A in infant rats

Conrad J. Mascarenhasa, Ren-yu Liub, Gordon A. Barra,b,c   

  1. a. Department of Anesthesiology and Critical Care, Children’s Hospital of Philadelphia, Philadelphia 19104, USA
    b. Department of Anesthesiology and Critical Care, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
    c. Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA
  • Received:2019-01-25 Accepted:2019-07-03 Online:2020-03-10 Published:2020-03-18
  • Contact: Gordon A. Barr E-mail:Barrg@email.chop.edu

Objective

Premature and ill neonates undergo painful but medically necessary procedures while hospitalized. Although opiate drugs are administered as analgesics, problems associated with their side effects, tolerance, and potential dependence necessitate research into alternative pain-relieving medications. Here we test two plant-derived compounds in infant rats: sinomenine, which targets the Mas-related G-protein coupled receptor member X2 opioid receptor; and salvinorin A, which is a κ opioid receptor agonist. In adult animals both sinomenine and salvinorin A are analgesic, but neither has been tested in infants. 


Methods

We used the formalin and thermal plantar tests in rats 7- and 21-days of age (PN7; PN21) for behavioral signs of pain. In addition, brain sections were stained using Fos immunohistochemistry to examine patterns of brain activation in the midbrain periaqueductal gray and the paraventricular nucleus of the hypothalamus. 


Results

Sinomenine was analgesic in both the formalin and thermal tests on animals 21 days of age. At PN7 only the highest dose elevated response latencies in the thermal test and there were no effects of sinomenine in the formalin test. Analysis of Fos expression in the sinomenine-treated animals showed no drug effect, in contrast to the behavioral results. Salvinorin A was analgesic in the formalin test only at the highest dose at 21 days of age but not in the thermal test at either age. 


Conclusion

The increased modest effectiveness of sinomenine in older animals and the minimum salvinorin A drug effect suggest that the compounds act on sites that develop during the preweaning period (sinomenine) or after weaning (salvinorin A).

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Jin-zhou Tian, Jing Shi, Xin-qing Zhang, Qi Bi, Xin Ma, Zhi-liang Wang, Xiao-bin Li, Shu-li Shen, Lin Li, Zhen-yun Wu, Li-yan Fang, Xiao-dong Zhao, Ying-chun Miao, Peng-wen Wang, Ying Ren, Jun-xiang Yin, Yong-yan Wang, Beijing United Study Group on MCI of the Capital Foundation of Medical Developments. An explanation on "guiding principles of clinical research on mild cognitive impairment (protocol)". Journal of Chinese Integrative Medicine, 2008, 6(1): 15-21
[2] Yi-ting He, Qing-lin Zha, Jian-ping Yu, Yong Tan, Cheng Lu, Ai-ping Lv. Principal factor analysis of symptoms of rheumatoid arthritis and their correlations with efficacy of traditional Chinese medicine and Western medicine. Journal of Chinese Integrative Medicine, 2008, 6(1): 32-36
[3] Jun Cai, Hua Wang, Sheng Zhou, Bin Wu, Hua-rong Song, Zheng-rong Xuan. Effect of Sijunzi Decoction and enteral nutrition on T-cell subsets and nutritional status in patients with gastric cancer after operation: A randomized controlled trial. Journal of Chinese Integrative Medicine, 2008, 6(1): 37-40
[4] Wei Zhang, Xiang-feng Lu, Xiao-mei Zhang, Jian-jun Wu, Liang-duo Jiang. A rat model of pulmonary fibrosis induced by infusing bleomycin quickly through tracheal intubation. Journal of Chinese Integrative Medicine, 2008, 6(1): 60-67
[5] A-gao Zhou, Yong Zhang, Gang Kui, De-Yun Kong, Hai-liang Ge, Qiu-hua Ren, Jia-rong Dong, Sheng Hong, Xu-ming Mao, Yin Wang, Hui-zheng Zhang, Shu-jun Wang. Influence of traditional Chinese compound recipes with different efficacy on body weight, tumor weight and immune function in H22 cancer-bearing mice. Journal of Chinese Integrative Medicine, 2008, 6(1): 77-82
[6] Guo-hong Yuan, Xiao-jing Pang, He-chao Ma. Synergic effects of Danggui Buxue Decoction in reducing toxicity of cytoxan in tumor-bearing mice. Journal of Chinese Integrative Medicine, 2008, 6(1): 83-88
[7] Li Zhou, Hong-xing Zhang, Ling-guang Liu, Wen-jun Wan. Effect of electro-acupuncture at Fenglong (GV 16) on nitric oxide and endothelin in rats with hyperlipidemia. Journal of Chinese Integrative Medicine, 2008, 6(1): 89-92
[8] Jin-zhou Tian, Jing Shi, Xin-qing Zhang, Qi Bi, Xin Ma, Zhi-liang Wang, Xiao-bin Li, Shu-li Shen, Lin Li, Zhen-yun Wu, Li-yan Fang, Xiao-dong Zhao, Ying-chun Miao, Peng-wen Wang, Ying Ren, Jun-xiang Yin, Yong-yan Wang, Beijing United Study Group on MCI of the Capital Foundation of Medical Developments. Guiding principles of clinical research on mild cognitive impairment (protocol). Journal of Chinese Integrative Medicine, 2008, 6(1): 9-14
[9] Xin-jun Wang, Ling-ling Wang . A mechanism of endogenous opioid peptides for rapid onset of acupuncture effect in treatment of depression. Journal of Chinese Integrative Medicine, 2010, 8(11): 1014-1017
[10] Bo Wang , Wei Yan , Li-hui Hou, Xiao-ke Wu. Disorder of Tiangui (kidney essence) and reproductive dysfunction in patients with polycystic ovary syndrome. Journal of Chinese Integrative Medicine, 2010, 8(11): 1018-1022