Pharmacological Effects of Strychnos nux-vomica Alkaloids
Summary
Strychnos nux-vomica contains two principal alkaloids, strychnine and brucine, which exert a complex interplay of therapeutic and toxic effects. Strychnine, a potent antagonist at inhibitory glycine receptors in the spinal cord, produces stimulatory and convulsant outcomes at low doses, yet carries a very narrow therapeutic window. Brucine, while less toxic, displays a broad spectrum of bioactivities including anti-inflammatory, analgesic, anti-tumour and cardiovascular modulation. Both alkaloids undergo rapid absorption and distribution, crossing the blood–brain barrier and engaging various signalling pathways such as phosphorylation cascades and ion-channel regulation. Their pronounced central and peripheral nervous system effects have prompted investigations into structural modification, targeted delivery and protective co-administration strategies to harness therapeutic potential whilst mitigating neurotoxicity and hepatotoxicity. Global interest spans from traditional medicine applications to modern drug-development efforts aiming to exploit anticancer, analgesic and anti-inflammatory properties within safer pharmaceutical frameworks.
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Pharmacological Effects of Strychnos nux-vomica Alkaloids publication trend
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Technical terms
Alkaloid: A naturally occurring organic compound containing basic nitrogen atoms, often with potent physiological effects.
ADMET: A framework describing a compound’s absorption, distribution, metabolism, excretion and toxicity characteristics.
Therapeutic window: The dosage range between a drug’s minimum effective concentration and its minimum toxic concentration.
LD₅₀: The median lethal dose required to kill half the members of a tested population, indicating acute toxicity.
Glycine receptor: An inhibitory neurotransmitter receptor in the central nervous system that modulates chloride ion flow and neuronal excitability.
References
- A Combination of In Silico ADMET Prediction, In Vivo Toxicity Evaluation, and Potential Mechanism Exploration of Brucine and Brucine N-oxide—A Comparative Study. Molecules (2023).
- Brucine: A Review of Phytochemistry, Pharmacology, and Toxicology. Frontiers in Pharmacology (2020).
- Pharmacokinetic, acute toxicity, and pharmacodynamic studies of semen strychni total alkaloid microcapsules. Tropical Journal of Pharmaceutical Research (2021).
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