Natural Product Bioactivity in Medicinal Plants
Summary
Natural products derived from medicinal plants constitute a rich repository of structurally diverse compounds with a wide spectrum of biological activities. These include polyphenols, flavonoids, terpenoids and alkaloids that mediate antioxidant, anti-inflammatory, antimicrobial and antiproliferative effects. Traditional knowledge has guided the selection of many species for further study, while modern analytical methods such as high-performance liquid chromatography and mass spectrometry have accelerated compound identification and mechanistic elucidation. Research has revealed that synergistic interactions between multiple phytochemicals often underlie the potent bioactivities observed in crude extracts. Advances in understanding modes of action—ranging from free-radical scavenging to enzyme inhibition and modulation of cellular signalling pathways—have underpinned the development of herbal formulations and inspired derivative drug design. Globally, the affordability and accessibility of plant-derived therapeutics remain especially important in resource-limited settings, and ongoing work seeks to optimise extraction, standardisation and delivery strategies. The integration of ethnopharmacology with contemporary pharmacology thus continues to drive the discovery of lead compounds, offering promising avenues for the prevention and treatment of a variety of human ailments.
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Natural Product Bioactivity in Medicinal Plants publication trend
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Technical terms
Polyphenols: A class of plant secondary metabolites characterised by multiple phenolic rings, notable for antioxidant properties.
Flavonoids: Polyphenolic compounds with a common diphenylpropane (C6–C3–C6) structure, implicated in anti-inflammatory and antiviral activities.
Tannins: High-molecular-weight polyphenols that can precipitate proteins and exhibit antimicrobial and antioxidant effects.
MIC (Minimum Inhibitory Concentration): The lowest concentration of a substance required to prevent visible growth of a microorganism.
IC50 (Half-Maximal Inhibitory Concentration): The concentration of an agent at which a biological process or component is inhibited by 50%.
DPPH Assay: A spectrophotometric method to assess free-radical scavenging capacity using the stable DPPH radical.
FRAP Assay: Ferric reducing antioxidant power assay that measures the ability of an extract to reduce Fe3+ to Fe2+ under acidic conditions.
References
- Pharmacological Property and Cytotoxic Effect Showing Antiproliferative Potency in Human Melanoma Cell Lines (A375) of Combretum racemosum P. Beauv. Leaf and Root Extracts Used in Benin. Antioxidants (2023).
- Evaluation of Antiproliferative, Antimicrobial, Antioxidant, Antidiabetic and Phytochemical Analysis of Anogeissus dhofarica A. J. Scott. Antibiotics (2023).
- Phytochemical Composition of Combretum molle (R. Br. ex G. Don.) Engl. & Diels Leaf and Stem Extracts. Plants (2023).
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