Thymoquinone in Ocular Neurodegeneration: Modulation of Pathological Mechanisms via Multiple Pathways

Nur Musfirah Mahmud, Luminita Paraoan, Nurliza Khaliddin, Tengku Ain Kamalden

Research output: Contribution to journalReview articlepeer-review

1 Citation (Scopus)

Abstract

Thymoquinone is a naturally occurring compound and is the major component of Nigella sativa, also known as black seed or black cumin. For centuries thymoquinone has been used especially in the Middle East traditionally to treat wounds, asthma, allergies, fever, headache, cough, hypertension, and diabetes. Studies have suggested beneficial effects of thymoquinone to be attributed to its antioxidant, antibacterial, anti-oxidative stress, anti-inflammatory, and neuroprotective properties. Recently, there has been a surge of interest in thymoquinone as a treatment for neurodegeneration in the brain, such as that seen in Alzheimer's (AD) and Parkinson's diseases (PD). In vitro and in vivo studies on animal models of AD and PD suggest the main neuroprotective mechanisms are based on the anti-inflammatory and anti-oxidative properties of thymoquinone. Neurodegenerative conditions of the eye, such as Age-related Macular Degeneration (AMD) and glaucoma share at least in part similar mechanisms of neuronal cell death with those occurring in AD and PD. This review aims to summarize and critically analyze the evidence to date of the effects and potential neuroprotective actions of thymoquinone in the eye and ocular neurodegenerations.

Original languageEnglish
Pages (from-to)786926
JournalFrontiers in Cellular Neuroscience
Volume16
Early online date2 Mar 2022
DOIs
Publication statusPublished - 2 Mar 2022
Externally publishedYes

Keywords

  • thymoquinone
  • neuroprotection
  • retinal pigment epithelium
  • oxidative stress
  • age-related macular degeneration

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