Pharmacological Properties of Quinolizidine Alkaloids
Summary
Quinolizidine alkaloids are a diverse class of nitrogen-containing secondary metabolites characterised by a bicyclic quinolizidine nucleus, predominantly found in leguminous plants such as Lupinus and Sophora species. These compounds exhibit a wide range of biological activities. Certain quinolizidines, including matrine and oxymatrine, demonstrate potent antineoplastic effects by inducing apoptosis and arresting cell-cycle progression in various tumour cell lines. Others, such as sparteine and cytisine, act as partial agonists at nicotinic acetylcholine receptors, underpinning their use in smoking-cessation therapies and potential applications in neurodegenerative disease. Anti-inflammatory properties arise from the suppression of pro-inflammatory cytokine release and inhibition of nuclear factor-κB signalling. Antimicrobial and antiviral activities have been observed against bacterial pathogens and viruses, respectively. Cardiovascular benefits include anti-arrhythmic and vasodilatory effects through calcium-channel modulation. The structural scaffold of quinolizidines offers a versatile platform for medicinal chemistry optimisation, enabling the design of analogues with improved selectivity and pharmacokinetic profiles. Continued research into structure–activity relationships and safety profiles is expanding the therapeutic potential of this important alkaloid family.
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Pharmacological Properties of Quinolizidine Alkaloids publication trend
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Technical terms
Quinolizidine alkaloids: A class of bicyclic nitrogenous compounds derived from leguminous plants, noted for diverse pharmacological activities.
Apoptosis: Programmed cell death characterised by energy-dependent cellular events, crucial for removing damaged or unwanted cells without triggering inflammation.
Nicotinic acetylcholine receptor: A ligand-gated ion channel in the nervous system that mediates synaptic transmission; modulation by alkaloids can alter neuronal signalling and behaviour.
References
- Extraction And Isolation Of Alkaloids Of Sophora Alopecuroides And Their Anti-Tumor Effects In H22 Tumor-Bearing Mice. African Journal of Traditional Complementary and Alternative Medicines (2014).
- Study on the inhibitory effect of total alkaloids of Sophora Alopecuroides on osteosarcoma cell growth. African Journal of Traditional Complementary and Alternative Medicines (2013).
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