Special Issue "Identification and Therapeutic Properties of Secondary Metabolites of Medicinal Plants II"

A special issue of Metabolites (ISSN 2218-1989). This special issue belongs to the section "Plant Metabolism".

Deadline for manuscript submissions: 29 February 2024 | Viewed by 2048

Special Issue Editors

Department of Pharmacognosy, Faculty of Pharmacy and Biochemistry, University of Zagreb, 10000 Zagreb, Croatia
Interests: phytotherapy; phytochemistry; natural product chemistry; chromatography; extraction procedures; secondary metabolites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Secondary metabolites comprise a diverse group of molecules produced by higher plants that are not directly involved in the normal growth, development, or reproduction of the plants that produce them. Nevertheless, a growing body of research indicates that they may display multiple effects beneficial for the general well-being of human organisms. These effects include both non-specific ones that affect the whole organism, such as antioxidant or anti-inflammatory effects, and more specific effects that target just one organ or system, such as laxative, myorelaxant, or antitussive effects, to name a few. Among the plant secondary metabolites used as therapeutic agents are flavonoids, terpenes, cardiac glycosides, alkaloids, anthraquinone derivatives, and many others. They may be a part of prescription drugs (such as atropine or digoxine), or be incorporated into various phytochemical preparation or food supplements. However, for proper testing of the pharmacological activity of a secondary metabolite, it should be identified or isolated from the plant material and subjected to the appropriate biological assays.

This Special Issue is dedicated to the “Identification and Therapeutic Properties of Secondary Metabolites of Medicinal Plants” including, but not limited to, their isolation and structure determination, as well as chromatographic methods for their analysis in plant materials. Furthermore, submissions related to the in vivo, in vitro, and in silico study of their pharmacological activities are strongly encouraged.

Prof. Dr. Marijana Zovko Končić
Dr. Michał Tomczyk
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metabolites is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • antioxidant activity
  • bioactivity
  • chromatography
  • phytochemistry
  • phytotherapy
  • plant secondary metabolites
  • polyphenols

Published Papers (2 papers)

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Research

18 pages, 7328 KiB  
Article
Uncovering the Interrelation between Metabolite Profiles and Bioactivity of In Vitro- and Wild-Grown Catmint (Nepeta nuda L.)
Metabolites 2023, 13(10), 1099; https://doi.org/10.3390/metabo13101099 - 20 Oct 2023
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Abstract
Nepeta nuda L. is a medicinal plant enriched with secondary metabolites serving to attract pollinators and deter herbivores. Phenolics and iridoids of N. nuda have been extensively investigated because of their beneficial impacts on human health. This study explores the chemical profiles of [...] Read more.
Nepeta nuda L. is a medicinal plant enriched with secondary metabolites serving to attract pollinators and deter herbivores. Phenolics and iridoids of N. nuda have been extensively investigated because of their beneficial impacts on human health. This study explores the chemical profiles of in vitro shoots and wild-grown N. nuda plants (flowers and leaves) through metabolomic analysis utilizing gas chromatography and mass spectrometry (GC–MS). Initially, we examined the differences in the volatiles’ composition in in vitro-cultivated shoots comparing them with flowers and leaves from plants growing in natural environment. The characteristic iridoid 4a-α,7-β,7a-α-nepetalactone was highly represented in shoots of in vitro plants and in flowers of plants from nature populations, whereas most of the monoterpenes were abundant in leaves of wild-grown plants. The known in vitro biological activities encompassing antioxidant, antiviral, antibacterial potentials alongside the newly assessed anti-inflammatory effects exhibited consistent associations with the total content of phenolics, reducing sugars, and the identified metabolic profiles in polar (organic acids, amino acids, alcohols, sugars, phenolics) and non-polar (fatty acids, alkanes, sterols) fractions. Phytohormonal levels were also quantified to infer the regulatory pathways governing phytochemical production. The overall dataset highlighted compounds with the potential to contribute to N. nuda bioactivity. Full article
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19 pages, 1532 KiB  
Article
Comprehensive Characterization of Secondary Metabolites in Fruits and Leaves of Cloudberry (Rubus chamaemorus L.)
Metabolites 2023, 13(5), 598; https://doi.org/10.3390/metabo13050598 - 27 Apr 2023
Viewed by 922
Abstract
Cloudberry (Rubus chamaemorus L.) is a circumpolar boreal plant rich in bioactive compounds and is widely used in food and in folk medicine. In this study, a combination of two-dimensional NMR spectroscopy and liquid chromatography–high-resolution mass spectrometry was used for the comprehensive [...] Read more.
Cloudberry (Rubus chamaemorus L.) is a circumpolar boreal plant rich in bioactive compounds and is widely used in food and in folk medicine. In this study, a combination of two-dimensional NMR spectroscopy and liquid chromatography–high-resolution mass spectrometry was used for the comprehensive characterization of secondary metabolites in cloudberry lipophilic and hydrophilic extracts. Special attention was paid to the leaf extractives, which are highly enriched in polyphenolic compounds, the content of which reaches 19% in the extract (in gallic acid equivalent). The chemical composition of the polyphenolic fraction is represented mainly by the glycosylated derivatives of flavonoids, hydroxycinnamic (primarily caffeic), gallic (including the structure of galloyl ascorbate) and ellagic acids, catechin, and procyanidins. The contents of aglycones in the polyphenolic fraction were 64 and 100 mg g−1 for flavonoids and hydroxycinnamic acids, respectively, while the content of free caffeic acid was 1.2 mg g−1. This determines the exceptionally high antioxidant activity of this fraction (750 mg g−1 in gallic acid equivalent) and the ability to scavenge superoxide anion radicals, which is 60% higher than that of Trolox. The lower polar fractions consist mainly of glycolipids, which include polyunsaturated linolenic acid (18:3), pentacyclic triterpenic acids, carotenoid lutein, and chlorophyll derivatives, among which pheophytin a dominates. Along with the availability, the high antioxidant and biological activities of cloudberry leaf extracts make them a promising source of food additives, cosmetics, and pharmaceuticals. Full article
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