Phytochemical Analysis and Biological Activity of Nepeta Species
Summary
The genus Nepeta, belonging to the Lamiaceae family, comprises over 300 species widely distributed across temperate regions. Research into these aromatic herbs has revealed a rich array of secondary metabolites, notably iridoids, monoterpenes and phenolic compounds, which underpin diverse biological activities. Phytochemical investigations employ techniques such as gas chromatography–mass spectrometry (GC-MS), high-performance liquid chromatography and Fourier-transform infrared spectroscopy to characterise essential oils, flavonoids and phenolic acids, with rosmarinic acid frequently emerging as a principal antioxidant constituent. Biological assays have demonstrated that Nepeta extracts exhibit antibacterial, antifungal, antiviral, anti-inflammatory and cytotoxic properties. Key bioactivities include inhibition of plant and human pathogens, potent free-radical scavenging, enzyme modulation relevant to metabolic disorders and induction of apoptosis in cancer cell lines. Cultivar selection and in vitro propagation strategies have been exploited to enhance target metabolite profiles, while mechanistic studies clarify links between chemical composition and efficacy. Together, these findings highlight the global significance of Nepeta as a source of natural products with applications in agriculture, food preservation, pharmaceuticals and pest control.
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Phytochemical Analysis and Biological Activity of Nepeta Species publication trend
The graph below shows the total number of articles in phytochemical analysis and biological activity of nepeta species across all publications each year (not limited to Nature Index journals).
Technical terms
Iridoids: A class of monoterpenoid secondary metabolites often found as glycosides, with recognised anti-inflammatory and antimicrobial effects.
Nepetalactone: A bicyclic monoterpene iridoid responsible for many of the insect-repellent and antimicrobial properties of Nepeta essential oils.
Phenolic compounds: Aromatic secondary metabolites containing one or more hydroxyl groups, notable for antioxidant and enzyme-inhibitory activities.
Gas chromatography–mass spectrometry (GC-MS): An analytical technique combining separation and structural identification of volatile and semi-volatile compounds.
IC50: The concentration of a substance that produces 50% inhibition of a given biological or biochemical function, used to compare potencies.
References
- Volatile metabolites from new cultivars of catnip and oregano as potential antibacterial and insect repellent agents. Frontiers in Plant Science (2023).
- Screening for Chemical Characterization and Pharmacological Properties of Different Extracts from Nepeta italica. Plants (2023).
- Cytotoxicity against A549 Human Lung Cancer Cell Line via the Mitochondrial Membrane Potential and Nuclear Condensation Effects of Nepeta paulsenii Briq., a Perennial Herb. Molecules (2023).
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