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Tropical Journal of Pharmaceutical Research
Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, Nigeria
ISSN: 1596-5996
EISSN: 1596-9827
Vol. 16, No. 3, 2017, pp. 509-514
Bioline Code: pr17066
Full paper language: English
Document type: Research Article
Document available free of charge

Tropical Journal of Pharmaceutical Research, Vol. 16, No. 3, 2017, pp. 509-514

 en Rhodiola rosea check for this species in other resources L extract shows protective activity against Alzheimer’s disease in 3xTg-AD mice
Tang, Hui; Wang, Jun; Zhao, Lei & Zhao, Xue-mei


Purpose: To investigate the protective effect of Rhodiola rosea L. extract (RRLE) against Alzheimer's disease in 3xTg-AD mice.
Methods: The cognitive function of 3xTg-AD mice was assessed using Morris water maze test. The levels of amyloid beta deposits and NeuN in the hippocampus were evaluated by immunohistochemistry. Brain neurotrophic-derived factor (BDNF) and tyrosine kinase B (TrkB) expressions were examined by western blot analysis.
Results: RRLE treatment significantly ameliorated learning and memory deficits in AD mice, as shown by increased time spent in the target zone during probe tests. The escape latency in animals treated with 400 mg/kg RRLE (20.5 ± 1.3 s) was significantly increased compared to the untreated mice (12.4 ± 1.3 s, p < 0.01). In addition, RRLE significantly decreased Aβ deposits, increased NeuN-positive cells, and upregulated the expression of BDNF (1.4 ± 0.2, p < 0.05) and TrkB (1.1 ± 0.2, p < 0.05) in the mice.
Conclusion: The findings suggest that RRLE treatment may be a useful strategy for treating memory impairment induced by several neurodegenerative diseases.

Rhodiola rosea L.; Alzheimer's disease; Neurodegenerative diseases; Memory impairment; NeuN-positive cells; Amyloid beta deposits

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