Journal
JOURNAL OF DIABETES AND METABOLIC DISORDERS
Volume 19, Issue 2, Pages 1381-1389Publisher
SPRINGER INT PUBL AG
DOI: 10.1007/s40200-020-00658-2
Keywords
Cymene; Fibril; Aβ 1– 42; Alzheimer’ s disease; Rat
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Purpose Alzheimer's disease (AD) is one of the most important neurodegenerative diseases and accompanied by the production of free radicals and inflammatory factors. Studies have shown that p-cymene has anti-inflammatory and anti-oxidant effects. Here, the effects of this compound were investigated on a rat model of AD. Methods In order to create Alzheimer's rat model, bilateral injection of Amyloid beta 1-42 (A beta 1-42) into rats hippocampus was performed. Both therapeutic (post-AD induction) and preventive effects of p-cymene consumption with doses of 50 and 100 mg/kg were investigated. In addition, the effects of adding short-term exercise to the process were also observed. In vitro, A beta 1-42 peptide was driven toward fibril formation and effect of p-cymene was observed on the resulting fibrils. Results Learning and memory indices in the AD rats were significantly reduced compared to the Sham group, while p-cymene consumption with both doses, as well as performing exercise counteracted AD consequences. Moreover, increased neurogenesis and reduced amyloid plaques counts were observed in treated rats. In vitro formed fibrils of A beta 1-42 were partially disaggregated in the presence of p-cymene. Discussion p-Cymene could act on this AD model via antioxidant and anti-inflammatory properties as well as direct anti-fibril effect. Conclusion p-cymene can improve AD-related disorders including memory impairment.
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