Formation of a salsolinol-like compound, the neurotoxin, 1-acetyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, in a cellular model of hyperglycemia and a rat model of diabetes

  • Authors:
    • De-Wei Song
    • Nian Xin
    • Bing-Jie Xie
    • Yu-Juan Li
    • Ling-Yan Meng
    • Hong-Mei Li
    • Michael Schläppi
    • Yu-Lin Deng
  • View Affiliations

  • Published online on: December 24, 2013     https://doi.org/10.3892/ijmm.2013.1604
  • Pages: 736-742
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Abstract

There are statistical data indicating that diabetes is a risk factor for Parkinson's disease (PD). Methylglyoxal (MG), a biologically reactive byproduct of glucose metabolism, the levels of which have been shown to be increase in diabetes, reacts with dopamine to form 1-acetyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline (ADTIQ); this formation may provide further insight into the connection between PD and diabetes. In this study, we investigated the role of ADTIQ in these two diseases to determine in an aim to enhance our understanding of the link between PD and diabetes. To this end, a cell model of hyperglycemia and a rat model of diabetes were established. In the cell model of hyperglycemia, compared with the control group, the elevated glucose levels promoted free hydroxyl radical formation (p<0.01). An ADTIQ assay was successfully developed and ADTIQ levels were detected and quantified. The levels of its precursors, MG and dopamine (DA), were determined in both the cell model of hyperglycemia and the rat model of diabetes. The proteins related to glucose metabolism were also assayed. Compared with the control group, ADTIQ and MG levels were significantly elevated not only in the cell model of hyperglycemia, but also in the brains of rats with diabetes (p<0.01). Seven key enzymes from the glycolytic pathway were found to be significantly more abundant in the brains of rats with diabetes. Moreover, it was found that adenosine triphosphate (ATP) synthase and superoxide dismutase (SOD) expression levels were markedly decreased in the rats with diabetes compared with the control group. Therefore, ADTIQ expression levels were found to be elevated under hyperglycemic conditions. The results reported herein demonstrate that ADTIQ, which is derived from MG, the levels of which areincreased in diabetes, may serve as a neurotoxin to dopaminergic neurons, eventually leading to PD.
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2014-March
Volume 33 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Song D, Xin N, Xie B, Li Y, Meng L, Li H, Schläppi M and Deng Y: Formation of a salsolinol-like compound, the neurotoxin, 1-acetyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, in a cellular model of hyperglycemia and a rat model of diabetes. Int J Mol Med 33: 736-742, 2014
APA
Song, D., Xin, N., Xie, B., Li, Y., Meng, L., Li, H. ... Deng, Y. (2014). Formation of a salsolinol-like compound, the neurotoxin, 1-acetyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, in a cellular model of hyperglycemia and a rat model of diabetes. International Journal of Molecular Medicine, 33, 736-742. https://doi.org/10.3892/ijmm.2013.1604
MLA
Song, D., Xin, N., Xie, B., Li, Y., Meng, L., Li, H., Schläppi, M., Deng, Y."Formation of a salsolinol-like compound, the neurotoxin, 1-acetyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, in a cellular model of hyperglycemia and a rat model of diabetes". International Journal of Molecular Medicine 33.3 (2014): 736-742.
Chicago
Song, D., Xin, N., Xie, B., Li, Y., Meng, L., Li, H., Schläppi, M., Deng, Y."Formation of a salsolinol-like compound, the neurotoxin, 1-acetyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline, in a cellular model of hyperglycemia and a rat model of diabetes". International Journal of Molecular Medicine 33, no. 3 (2014): 736-742. https://doi.org/10.3892/ijmm.2013.1604