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Oral treatment with the herbal formula B401 protects against aging-dependent neurodegeneration by attenuating oxidative stress and apoptosis in the brain of R6/2 mice

Authors Wang SE, Lin CL, Hsu CH, Sheu SJ, Wu CH

Received 5 August 2015

Accepted for publication 8 September 2015

Published 6 November 2015 Volume 2015:10 Pages 1825—1837

DOI https://doi.org/10.2147/CIA.S93819

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Supriya Swarnkar

Peer reviewer comments 4

Editor who approved publication: Professor Zhi-Ying Wu

Sheue-Er Wang,1,2 Ching-Lung Lin,1 Chih-Hsiang Hsu,1 Shuenn-Jyi Sheu,3 Chung-Hsin Wu1

1Department of Life Science, National Taiwan Normal University, Taipei, 2Department of Pathological Inspection, Saint Paul’s Hospital, Taoyuan, 3Brion Research Institute of Taiwan, Taipei, Taiwan

Background: Neurodegeneration is characterized by progressive neurological deficits due to selective neuronal loss in the nervous system. Huntington’s disease (HD) is an incurable neurodegenerative disorder. Neurodegeneration in HD patients shows aging-dependent pattern. Our previous study has suggested that a herbal formula B401 may have neuroprotective effects in the brains of R6/2 mice.
Objective: To clarify possible mechanisms for neurodegeneration, which improves the understanding the aging process. This study focuses on clarifying neurodegenerative mechanisms and searching potential therapeutic targets in HD patients.
Methods: The oxidative stress and apoptosis were compared in the brain tissue between R6/2 HD mice with and without oral B401 treatment. Expressions of proteins for oxidative stress and apoptosis in the brain tissue of R6/2 HD mice were examined by using immunostaining and Western blotting techniques.
Results: R6/2 HD mice with oral B401 treatment significantly reduced reactive oxygen species levels in the blood, but markedly increased expressions of superoxide dismutase 2 in the brain tissue. Furthermore, R6/2 HD mice with oral B401 treatment significantly increased expressions of B-cell lymphoma 2 (Bcl-2), but significantly reduced expressions of Bcl-2-associated X protein (Bax), calpain, and caspase-3 in the brain tissue.
Conclusion: Our findings provide evidence that the herbal formula B401 can remedy for aging-dependent neurodegeneration of R6/2 mice via suppressing oxidative stress and apoptosis in the brain. We suggest that the herbal formula B401 can be developed as a potential health supplement for ameliorating aging-dependent neurodegeneration.

Keywords: neuroprotection, reactive oxygen species, superoxide dismutase 2, B-cell lymphoma 2, Bcl-2-associated X protein, calpain, caspase-3, transgenic mouse model, Huntington’s disease

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