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Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment

  • Authors:
    • Yong Tang
    • Chonglin Yu
    • Jianming Wu
    • Haixia Chen
    • Yuan Zeng
    • Xiuling Wang
    • Le Yang
    • Qibing Mei
    • Shousong Cao
    • Dalian Qin
  • View Affiliations / Copyright

    Affiliations: Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China, Department of Human Anatomy, School of Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China, Chengdu Analytical Applications Center, Shimadzu (China) Co., Ltd., Chengdu, Sichuan 610063, P.R. China, Laboratory of Cancer Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
    Copyright: © Tang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 251-263
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    Published online on: November 9, 2017
       https://doi.org/10.3892/ijmm.2017.3245
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Abstract

Lychee seed is a traditional Chinese medicine and has many beneficial effects such as modulation of blood sugar and lipids, antioxidation, antivirus and antitumor. Studies have indicated that type II diabetes mellitus (T2DM) and Alzheimer's disease (AD) share common biological mechanisms including insulin resistance, impaired glucose metabolism, β‑amyloid (Aβ) formation, oxidative stress and presence of advanced glycation end products (AGEs). The present study investigated the effects of lychee seed extract (LSE) on neuroprotection, cognitive function improvement and possible underlying mechanisms in a rat model of T2DM with cognitive impairment. We analyzed the chemical profile of LSE using a UHPLC‑SPD chromatogram and evaluated its effect on the improvement of spatial learning and memory of rats by a Morris water maze. The levels of glucose, insulin, Aβ, AGEs, Tau protein and acetylcholinesterase in the blood and/or hippocampus of rats were determined by blood‑glucose meter, radioimmunoassay, chemical chromatometry, enzyme‑linked immunosorbent assay (ELISA) and immunohistochemical analysis, respectively. Results demonstrated that LSE consists of eight major and around 20 minor ingredients, and it remarkably prevents neuronal injury and improves cognitive functions in T2DM rats. The levels of glucose, insulin, Aβ, AGEs and Tau protein were significantly increased in the blood and/or hippocampus of T2DM rats, while LSE remarkably decreased their levels compared to vehicle treatment (P<0.01). The possible mechanisms may be associated with IR improvement and decreased formations of Aβ, AGEs and Tau protein in the hippocampus of T2DM rats. LSE may be developed as the agent for the treatment of T2DM and/or AD clinically.
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Copy and paste a formatted citation
Spandidos Publications style
Tang Y, Yu C, Wu J, Chen H, Zeng Y, Wang X, Yang L, Mei Q, Cao S, Qin D, Qin D, et al: Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment. Int J Mol Med 41: 251-263, 2018.
APA
Tang, Y., Yu, C., Wu, J., Chen, H., Zeng, Y., Wang, X. ... Qin, D. (2018). Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment. International Journal of Molecular Medicine, 41, 251-263. https://doi.org/10.3892/ijmm.2017.3245
MLA
Tang, Y., Yu, C., Wu, J., Chen, H., Zeng, Y., Wang, X., Yang, L., Mei, Q., Cao, S., Qin, D."Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment". International Journal of Molecular Medicine 41.1 (2018): 251-263.
Chicago
Tang, Y., Yu, C., Wu, J., Chen, H., Zeng, Y., Wang, X., Yang, L., Mei, Q., Cao, S., Qin, D."Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment". International Journal of Molecular Medicine 41, no. 1 (2018): 251-263. https://doi.org/10.3892/ijmm.2017.3245
Copy and paste a formatted citation
x
Spandidos Publications style
Tang Y, Yu C, Wu J, Chen H, Zeng Y, Wang X, Yang L, Mei Q, Cao S, Qin D, Qin D, et al: Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment. Int J Mol Med 41: 251-263, 2018.
APA
Tang, Y., Yu, C., Wu, J., Chen, H., Zeng, Y., Wang, X. ... Qin, D. (2018). Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment. International Journal of Molecular Medicine, 41, 251-263. https://doi.org/10.3892/ijmm.2017.3245
MLA
Tang, Y., Yu, C., Wu, J., Chen, H., Zeng, Y., Wang, X., Yang, L., Mei, Q., Cao, S., Qin, D."Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment". International Journal of Molecular Medicine 41.1 (2018): 251-263.
Chicago
Tang, Y., Yu, C., Wu, J., Chen, H., Zeng, Y., Wang, X., Yang, L., Mei, Q., Cao, S., Qin, D."Lychee seed extract protects against neuronal injury and improves cognitive function in rats with type II diabetes mellitus with cognitive impairment". International Journal of Molecular Medicine 41, no. 1 (2018): 251-263. https://doi.org/10.3892/ijmm.2017.3245
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