Neurodegenerative diseases and Withania somnifera (L.): An update.

Dar Nawab John, et al.
Journal of Ethnopharmacology, 2020

Abstract

Ethnopharmacological relevance

Withania somnifera (L.) Dunal also known as 'Ashwaghanda' in Sanskrit and as 'Indian Winter Cherry' in english. is an important medicinal herb in India. It is widely used in Indian systems of medicine as an adaptogen, nerve tonic, anti-stress, memory enhancer and against cognitive deficits, insomnia, anxiety, infectious diseases, infertility, rheumatoid arthritis and gout over thousands of years. Its formulations are mainly used in Unani and Ayurvedic system of medicine. It is a remarkable centuries old herbal Rasayana used to treat neuronal ailments and is known as ''Sattvic Kapha Rasayana.

Aim of the study

To review neuroprotective properties of Withania somnifera (L.)extract as well as its active constituents in neurodegenerative diseases and other neurological ailments.

Materials and Methods

The sources of information used in present article include Indian system of Medicine reports on the use of natural products, Medicinal books, research articles and scientific databases like PubMed, Google Scholar, Web of Science, Science-Direct, SciFinder, ACS Publications and Wiley Online Library.

Results

Research reports based largely on preclinical studies as well as few clinical trials have highlighted the neuroprotective role of Ashwagandha against many neurodegenerative diseases including Alzheimer's, Huntington's and Parkinson's disease. The protective effects of Ashwagandha were accomplished by restoring mitochondrial and endothelial function, mitigation of apoptosis, inflammation and oxidative stress mechanisms.

Conclusion

In this review, we recapitulated neuroprotective properties of Ashwagandha extracts and/or its major constituents and discussed their mechanisms of action and potential therapeutic applications. The pre-clinical as well as clinical studies suggest the use of Withania somnifera (L.) against neurodegenerative disease. However, extensive studies are warranted to validate the use of extract or its single constituents for its clinical use.

Keywords

Alzheimer's disease; Anti-inflammatory; Anti-stress; Huntington's; Nerve tonic; Neuroprotection; Parkinson's disease; Stroke; Withania somnifera; Withanolide-A; Withanone.

Copyright © 2020 Elsevier B.V. All rights reserved.

Conflict of interest statement

Declaration of competing interest Authors do not have any conflict of interest

PMID:32240781
DOI:10.1016/j.jep.2020.112769
Category:Brain / Mental Clarity

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