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Article

Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration

  • Authors:
    • Liping Huang
    • Minzhen Deng
    • Yongqi Fang
    • Ling Li
  • View Affiliations / Copyright

    Affiliations: Laboratory Center, The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China
  • Pages: 1566-1572
    |
    Published online on: August 24, 2015
       https://doi.org/10.3892/etm.2015.2704
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Abstract

The aim of the present study was to investigate the dynamic changes of five neurotransmitters and their associated enzymes in the rat plasma and brain tissues following the co‑administration of β‑asarone and levodopa (L‑dopa). The rats were divided into five groups, including the control group and four treatment groups that were intragastrically co‑administered β‑asarone and L‑dopa and sacrificed at 1, 5, 18 and 48 h, respectively. Neurotransmitter levels in the brain tissues and plasma were detected using high performance liquid chromatograph and the related enzymes of dopamine (DA) were measured using an enzyme‑linked immunosorbent assay. The results indicated that the striatal levels of L‑dopa and 3,4‑dihydroxyphenylacetic acid (DOPAC) peaked at 1 h and then returned to the normal levels, while the striatal levels of DA were stable within 48 h. In the cortex and hippocampus tissue, L‑dopa, DA, DOPAC and homovanillic acid (HVA) levels peaked at 1 h and then returned to normal levels. In the plasma, L‑dopa, DA, DOPAC and HVA levels peaked at 1 h. Compared with the control group, L‑dopa, DA and HVA levels were higher between 18 and 48 h, whereas the DOPAC level was lower. By contrast, no statistically significant differences were observed in the serotonin (5‑HT) levels among the plasma, hippocampus, cortex and striatum. Furthermore, the DA/L‑dopa ratio in the brain tissues and plasma increased in the first 5 h, while (DOPAC + HVA)/DA ratios demonstrated a significant reduction. Striatal tyrosine hydroxylase (TH) and aromatic amino acid decarboxylase (AADC) levels were higher compared with the control group; however, catechol‑O‑methyltransferase (COMT) and monoamine oxidase B levels were reduced. In the rat plasma, TH and COMT peaked at 1 h, while AADC peaked at 5 h. In conclusion, the results of the present study indicate that the co‑administration of L‑dopa and β‑asarone may be used to maintain a stable striatal DA level within 48 h. In addition, this treatment may promote DA generation by AADC and reduce the metabolism of DA by COMT.
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Copy and paste a formatted citation
Spandidos Publications style
Huang L, Deng M, Fang Y and Li L: Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration. Exp Ther Med 10: 1566-1572, 2015.
APA
Huang, L., Deng, M., Fang, Y., & Li, L. (2015). Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration. Experimental and Therapeutic Medicine, 10, 1566-1572. https://doi.org/10.3892/etm.2015.2704
MLA
Huang, L., Deng, M., Fang, Y., Li, L."Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration". Experimental and Therapeutic Medicine 10.4 (2015): 1566-1572.
Chicago
Huang, L., Deng, M., Fang, Y., Li, L."Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration". Experimental and Therapeutic Medicine 10, no. 4 (2015): 1566-1572. https://doi.org/10.3892/etm.2015.2704
Copy and paste a formatted citation
x
Spandidos Publications style
Huang L, Deng M, Fang Y and Li L: Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration. Exp Ther Med 10: 1566-1572, 2015.
APA
Huang, L., Deng, M., Fang, Y., & Li, L. (2015). Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration. Experimental and Therapeutic Medicine, 10, 1566-1572. https://doi.org/10.3892/etm.2015.2704
MLA
Huang, L., Deng, M., Fang, Y., Li, L."Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration". Experimental and Therapeutic Medicine 10.4 (2015): 1566-1572.
Chicago
Huang, L., Deng, M., Fang, Y., Li, L."Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following β-asarone and levodopa co-administration". Experimental and Therapeutic Medicine 10, no. 4 (2015): 1566-1572. https://doi.org/10.3892/etm.2015.2704
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