molecules-logo

Journal Browser

Journal Browser

Advances in Extraction, Biological Activity of Natural Products and Their Derivatives

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Natural Products Chemistry".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1253

Special Issue Editors


E-Mail Website
Guest Editor
Department of Applied and Basic Science, Università degli Studi della Basilicata, 85100 Potenza, PZ, Italy
Interests: absolute configuration; vibrational circular dichroism; electronic circular dichroism; optical rotation; stereochemistry; asymmetric synthesis; natural products; computational chemistry

Special Issue Information

Dear Colleagues,

The exploration of natural products has become increasingly significant in the quest for novel therapeutic agents and new biopesticides for application in agriculture, forests, and urban and historical gardens. Recent advances in extraction techniques, such as microwave-assisted extraction, supercritical fluid extraction, and ultrasonic extraction, have revolutionized the efficiency and selectivity of isolating bioactive compounds from natural sources. These innovative methods not only enhance yield, but also preserve the integrity of sensitive compounds, paving the way for a more sustainable approach to sourcing natural products.

Moreover, understanding the biological activity of these natural compounds and their derivatives is essential for their application in various fields, including medicine, agriculture, and cosmetics. Recent studies have highlighted the potential of natural products to exhibit antimicrobial, anti-inflammatory, antioxidant, antiviral, and anticancer properties, making them promising candidates for drug development. In particular, research has been focused on isolating compounds with new carbon skeletons to overcome the emergency linked to the development of resistance to antibiotics, as well as providing anticancer properties and resistance to synthetic pesticides to significantly reduce or completely eliminate the environmental pollution that affects climate change. The interplay between structure, in particular the absolute configuration, and biological activity offers a rich area for research, particularly in the context of optimizing these compounds through synthetic modifications and derivative synthesis on the basis of structure–activity relationship study results.

This Special Issue invites contributions that delve into the latest advancements in extraction methodologies, the assessment of biological activities, and the potential applications of natural products and their derivatives. We encourage researchers to share their insights on innovative extraction techniques, novel bioactive compounds, their mechanisms of action, and their absolute configuration assignment. By fostering collaboration and knowledge exchange, we aim to advance the field of natural product research and highlight the significance of these compounds in addressing contemporary health and environmental challenges.

We look forward to receiving your submissions that contribute to this exciting and rapidly evolving area of study.

Dr. Ernesto Santoro
Prof. Dr. Antonio Evidente
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Molecules is an international peer-reviewed open access semimonthly 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

  • novel extraction
  • absolute configuration
  • supercritical fluid
  • microwave-assisted extraction
  • natural products

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

44 pages, 4335 KB  
Article
Nanoencapsulated Dunaliella tertiolecta Extract and β-Carotene in Liposomal Carriers: Antioxidant and Erythroprotective Potential Through Sustained-Release Systems
by Jonathan García-Morales, Ricardo Iván González-Vega, Diana Fimbres-Olivarría, Ariadna Thalía Bernal-Mercado, Santiago Pedro Auobourg-Martínez, Karla Alejandra López-Gastélum, Silvia Elena Burruel-Ibarra, María Irene Silvas-García, Andrea Grijalva-Molina, José de Jesús Ornelas-Paz and Carmen Lizette Del-Toro-Sánchez
Molecules 2025, 30(19), 3924; https://doi.org/10.3390/molecules30193924 - 29 Sep 2025
Viewed by 348
Abstract
The nanoencapsulation of bioactive compounds such as β-carotene and microalgal extracts has emerged as an effective strategy to enhance their stability, bioavailability, and biological efficacy, particularly against oxidative stress. Dunaliella tertiolecta, a microalga rich in carotenoids and chlorophylls, presents notable antioxidant and [...] Read more.
The nanoencapsulation of bioactive compounds such as β-carotene and microalgal extracts has emerged as an effective strategy to enhance their stability, bioavailability, and biological efficacy, particularly against oxidative stress. Dunaliella tertiolecta, a microalga rich in carotenoids and chlorophylls, presents notable antioxidant and erythroprotective properties; however, its bioactive potential is limited by low bioaccessibility and degradation during processing and digestion. This study aimed to develop and evaluate nanoliposomes loaded with D. tertiolecta extract and β-carotene as sustained-release systems to improve antioxidant performance and erythroprotective effects. The methodology involved optimizing microalgal cultivation under nitrogen and salinity stress to enhance pigment accumulation, followed by extraction, nanoencapsulation via the particle dispersion method, and physicochemical characterization of the nanoliposomes. Antioxidant capacity and release kinetics were assessed through ABTS and FRAP assays, while erythroprotective activity was evaluated by monitoring oxidative hemolysis in human erythrocytes. The release kinetics revealed an anomalous transport mechanism for both systems, with β-carotene showing faster and more efficient release due to its greater lipophilic compatibility with the nanoliposomal matrix. The nanoliposomal systems demonstrated nanoscale size, high encapsulation efficiency, sustained antioxidant release, and effective erythrocyte protection, with the extract-loaded formulation exhibiting synergistic effects superior to isolated β-carotene. These findings support the potential application of this nanotechnology-based delivery system in functional foods, nutraceuticals, and biomedical formulations aimed at preventing oxidative stress-related cellular damage. Full article
Show Figures

Figure 1

12 pages, 1038 KB  
Article
Extraction and Identification of the Bioactive Metabolites Produced by Curvularia inaequalis, an Endophytic Fungus Collected in Iran from Echium khuzistanicum Mozaff
by Maryam Besharati, Maria Letizia Ciavatta, Marianna Carbone, Nadia Cacciapuoti, Martina Aversa, Emanuela Roscetto, Stefany Castaldi, Giancarlo Perrone, Angela Boari, Katia Gialluisi, Maria Rosaria Catania, Sayed Ali Moosawi-Jorf and Antonio Evidente
Molecules 2025, 30(19), 3870; https://doi.org/10.3390/molecules30193870 - 24 Sep 2025
Viewed by 439
Abstract
Endophytic fungi (EF) are microorganisms that colonize the internal tissues of host plants, providing a range of benefits to them. In this symbiosis, they act as a reservoir of bioactive metabolites that are important for enhancing the host’s defense mechanisms as a resistance [...] Read more.
Endophytic fungi (EF) are microorganisms that colonize the internal tissues of host plants, providing a range of benefits to them. In this symbiosis, they act as a reservoir of bioactive metabolites that are important for enhancing the host’s defense mechanisms as a resistance against pathogens. These molecules usually possess antimicrobial properties that can be exploited for application in agriculture and medicine. In this context, the current work was designed to evaluate the phytotoxic and antimicrobial properties of the endophytic fungus Curvularia inaequalis, isolated for the first time from the Iranian medicinal plant Echium khuzistanicum. Culture filtrates, their organic extracts, and isolated metabolites were tested against a series of plants to assess their phytotoxicity, as well as against a wide range of plant and human pathogens to evaluate their antimicrobial activity. The main compounds characterizing the organic extract of C. inaequalis have been identified as (R)-phomalactone, catenioblin A, and (-) asperpentyn (13) by using spectroscopic techniques, NMR mainly, and HR-ESI-MS. In the bioactivity evaluation carried out in this study, (R)-phomalactone (1) stood out as the most promising compound, exhibiting significant non-host phytotoxic activity on tomato leaves; potent antibacterial activity against a wide range of human pathogens, including methicillin-resistant Staphylococcus aureus (MRSA) strains; and marked antifungal activity against several economically important phytopathogens. (–)-Asperpentyn (3) also showed robust and selective antifungal activity against phytopathogens, while catenioblin A (2) exhibited only a slight phytotoxic effect and limited overall bioactivity in this study. These findings reveal that the isolated endophytic fungi hold considerable promise as an untapped source of bioactive metabolites with antibacterial, antifungal, and phytotoxic activities. Full article
Show Figures

Graphical abstract

Back to TopTop