The Emerging Landscape of Natural Small-molecule Therapeutics for Huntington's Disease
Shahnawaz Ali Bhat1, Shakir Ahamad2, Nawab John Dar3
1Department of Zoology, Aligarh Muslim University, Aligarh, U.P., India.
Insights
Huntington's disease (HD) is a fatal neurodegenerative disorder. Natural products show promise for disease modification by reducing oxidative stress and neuroinflammation, unlike current symptomatic treatments.
Area of Science:
- Neuroscience
- Genetics
- Pharmacology
Background:
- Huntington's disease (HD) is a fatal, inherited neurodegenerative disorder characterized by neuronal loss.
- It stems from an expanded polyglutamine (polyQ) in the huntingtin (HTT) gene, producing toxic mutant HTT (mHTT) protein.
- Current treatments offer only symptomatic relief, highlighting the need for disease-modifying therapies.
Approach:
- This review summarizes the pathogenesis of HD.
- It focuses on natural products with clinical and pre-clinical anti-HD potential.
- The review examines their therapeutic effects and neuroprotective mechanisms.
Key Points:
- Natural products possess anti-inflammatory and antioxidant properties beneficial for HD.
- They mitigate mHTT-induced oxidative stress and neuroinflammation.
- They improve mitochondrial function and promote anti-apoptotic and pro-autophagic mechanisms for neuronal survival.
Conclusions:
- Natural products represent a promising avenue for developing disease-modifying therapeutics for HD.
- Their multifaceted neuroprotective mechanisms offer hope beyond symptomatic treatment.
- Further research into natural products could revolutionize HD treatment strategies.
Abstract:
Huntington's disease (HD) is a rare and fatal neurodegenerative disorder with no diseasemodifying therapeutics. HD is characterized by extensive neuronal loss and is caused by the inherited expansion of the huntingtin (HTT) gene that encodes a toxic mutant HTT (mHTT) protein having expanded polyglutamine (polyQ) residues. Current HD therapeutics only offer symptomatic relief. In fact, Food and Drug Administration (FDA) approved two synthetic small-molecule VMAT2 inhibitors, tetrabenazine (1) and deutetrabenazine (2), for managing HD chorea and various other diseases in clinical trials. Therefore, the landscape of drug discovery programs for HD is evolving to discover disease- modifying HD therapeutics. Likewise, numerous natural products are being evaluated at different stages of clinical development and have shown the potential to ameliorate HD pathology. The inherent anti-inflammatory and antioxidant properties of natural products mitigate the mHTT-induced oxidative stress and neuroinflammation, improve mitochondrial functions, and augment the anti-apoptotic and pro-autophagic mechanisms for increased survival of neurons in HD. In this review, we have discussed HD pathogenesis and summarized the anti-HD clinical and pre-clinical natural products, focusing on their therapeutic effects and neuroprotective mechanism/s.
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