Antioxidant Activity of Plant Extracts—Volume II

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Phytochemistry".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 1896

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Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3-5 Calea Mănă¸Stur, 400372 Cluj-Napoca, Romania
Interests: food chemistry; bioinorganic chemistry; analytical chemistry; biochemistry
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Guest Editor
Department of Food Science, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania
Interests: food chemistry; infrared spectroscopy; food biochemistry; food science; plant physiology; antioxidants; polyphenols; anthocyanins; high-pressure liquid chromatography
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Food Science, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Calea Mănăştur 3-5, 400372 Cluj-Napoca, Romania
Interests: phenolic compounds; anthocyanins; melanoma; chromatography; food chemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Antioxidants are specific compounds that protect the cells against the damaging effects of free radicals.

In terms of health properties, many studies have demonstrated their various biological activities, including anti-inflammatory, anticancer, antibacterial, and antiviral properties. Specific bioactive compounds from plants have been described as functioning as antioxidants, enzyme inhibitors, epigenetic modulators, or even suppressors in some signaling pathways.

Throughout the years, researchers have been focused mainly on the antioxidant activity of plants’ bioactive compounds, because it targets an important niche in today’s society: pollution. Every day, we are exposed to radiation, air pollutants, and water and food pollutants, all representing some of the leading causes of oxidative stress. Our cells produce persistently reactive species, such as reactive oxygen species (ROS) and reactive nitrogen species (RNS), which can cause many cardiovascular and neurodegenerative diseases as well as cancer and metabolic diseases. Antioxidants are specific compounds that protect the cells against the damaging effects of free radicals.

Phytochemicals are known to act as free-radical scavengers and metal chelators. Although there are plenty in vitro studies that demonstrate that phytochemicals are some of the most important antioxidant molecules in animal cells, the antioxidant efficacy of some phytochemicals in vivo is less documented due to the poor knowledge of their uptake and bioavailability. However, it is known that high daily consumption of phytochemicals in the form of vegetables, fruits, and beverages may be helpful for scavenging ROS, thus preventing free-radical damage to biological molecules such as lipids, proteins, and DNA.

Phytochemical such as flavonoids, phenolic acids, anthocyanins, and vitamins have been shown to possess a variety of health benefits, and many studies suggest that they may be promising candidates in the treatment of various chronic diseases, including cancer.

This Special Issue of Plants, entitled “Antioxidant Activity of Plant Extracts”, welcomes original research and reviews with a particular focus on the extraction, purification, and phytochemical characterization of antioxidant activities of plant bioactive compounds and their potential health benefits in vivo and in vitro.

Prof. Dr. Andreea Stănilă
Prof. Dr. Carmen Socaciu
Dr. Zorita Diaconeasa
Guest Editors

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Keywords

  • phytochemicals
  • antioxidants
  • bioactive compounds
  • health benefits

Related Special Issue

Published Papers (3 papers)

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Research

26 pages, 10836 KiB  
Article
Phytochemical Screening, Antioxidant Effect and Sperm Quality of the Bomba ceiba Stamen Extracts on Charolais Cattle Sperm Induced by Ferrous Sulfate
by Jiraporn Laoung-on, Sakaewan Ounjaijean, Paiwan Sudwan and Kongsak Boonyapranai
Plants 2024, 13(7), 960; https://doi.org/10.3390/plants13070960 - 26 Mar 2024
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Abstract
Orange Bombax ceiba (B. ceiba) is an indigenous plant, and its stamen is an important ingredient in traditional Lanna food. There are limitations in scientific reports on the effects of the biological activities of B. ceiba stamens on the male reproductive [...] Read more.
Orange Bombax ceiba (B. ceiba) is an indigenous plant, and its stamen is an important ingredient in traditional Lanna food. There are limitations in scientific reports on the effects of the biological activities of B. ceiba stamens on the male reproductive system. This study aims to investigate the phytochemical compounds of the orange B. ceiba stamen and its potential effect on the antioxidant properties and quality of cattle sperm treated with Fe. The orange BUE had the highest total phenolics, total tannins, total monomeric anthocyanins, and maximal antioxidant potential. The orange BAE had the highest concentration of total flavonoids. LC-QTOF/MS showed that the orange BUE contained the highest number of phytochemical compounds related to male reproductive enhancement. The orange BUE enhanced sperm motility, and both the orange BUE and the BAE enhanced sperm viability and normal sperm morphology via free radical scavenging. It might be suggested that B. ceiba stamens have benefits for sperm preservation, sperm quality, and increasing the economic value of local plants, and that they may be developed and used to guard against oxidative stress from cryodamage induced by frozen semen technology. Full article
(This article belongs to the Special Issue Antioxidant Activity of Plant Extracts—Volume II)
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15 pages, 1458 KiB  
Article
Chemodiversity of Arctic Plant Dryas oxyodonta: LC-MS Profile and Antioxidant Activity
by Nina I. Kashchenko, Daniil N. Olennikov and Nadezhda K. Chirikova
Plants 2024, 13(6), 868; https://doi.org/10.3390/plants13060868 - 18 Mar 2024
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Abstract
Dryas oxyodonta Yuz. is a perennial evergreen shrub from the Rosaceae family. D. oxyodonta thrives in subalpine and subarctic regions, as well as in highlands spanning from Central Asia to Siberia and Mongolia. Owing to a lack of information on its chemical composition, [...] Read more.
Dryas oxyodonta Yuz. is a perennial evergreen shrub from the Rosaceae family. D. oxyodonta thrives in subalpine and subarctic regions, as well as in highlands spanning from Central Asia to Siberia and Mongolia. Owing to a lack of information on its chemical composition, we conducted qualitative and quantitative chromatographic analyses on extracts from the leaves and flowers of D. oxyodonta sourced from various Siberian habitats. Employing high-performance liquid chromatography with photodiode-array detection and electrospray ionization triple-quadrupole mass spectrometric detection, we identified 40 compounds, encompassing gallotannins, hydroxycinnamates, procyanidins, catechins, flavonoids, and triterpenes. All Siberian populations of D. oxyodonta exhibited a notable abundance of phenolic compounds. Furthermore, we identified rare glycosides, such as sexangularetin and corniculatusin, as potential markers of the chemodiversity within the Dryas genus. Extracts from the flowers and leaves were effective scavengers of free radicals, including DPPH, ABTS•+−, O2•−, and OH radicals. Our findings unequivocally establish D. oxyodonta as a rich source of phenolic compounds with potent antioxidant activity, suggesting its potential utility in developing novel functional products. Full article
(This article belongs to the Special Issue Antioxidant Activity of Plant Extracts—Volume II)
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19 pages, 2676 KiB  
Article
The Antioxidant, Antibacterial and Cell-Protective Properties of Bioactive Compounds Extracted from Rowanberry (Sorbus aucuparia L.) Fruits In Vitro
by Mara Aurori, Mihaela Niculae, Daniela Hanganu, Emoke Pall, Mihai Cenariu, Dan Cristian Vodnar, Nicodim Fiţ and Sanda Andrei
Plants 2024, 13(4), 538; https://doi.org/10.3390/plants13040538 - 16 Feb 2024
Viewed by 677
Abstract
Considering that Sorbus aucuparia fruits have been underutilized despite their tremendous potential, this study aimed to correlate the in vitro antioxidant, antibacterial and cell-protective abilities of fruit extracts derived from Sorbus aucuparia Romanian cultivars with their phytochemical composition. Therefore, following the preparation of [...] Read more.
Considering that Sorbus aucuparia fruits have been underutilized despite their tremendous potential, this study aimed to correlate the in vitro antioxidant, antibacterial and cell-protective abilities of fruit extracts derived from Sorbus aucuparia Romanian cultivars with their phytochemical composition. Therefore, following the preparation of ethanolic and carotenoid extracts, phytochemical screening was performed using UV–Vis and HPLC-DAD-ESI-MS methods. The antioxidant activity was analyzed using DPPH and FRAP tests. As the results revealed high contents of bioactive compounds (polyphenols 1.11 mg GAE/g DM, flavonoids 430.06 µg QE/g DM and carotenoids 95.68 µg/g DM) and an important antiradical action (DPPH 24.51 mg/mL and FRAP 0.016 µM TE/mL), we chose to further examine the fruits’ biological properties. The antibacterial capacity was assessed employing agar well diffusion and broth microdilution techniques, with fruits displaying an intense activity against MSSA, MRSA and Enterococcus faecalis, but also E. coli and Pseudomonas aeruginosa. The cell-protective activity was analyzed on gentamicin-stressed renal cells, through MTT and Annexin V-FITC assays. Importantly, a significant increase in viability was registered on stressed cells following extract administration in low doses; nevertheless, viability was noticed to decline when exposed to elevated concentrations, potentially due to the cumulative actions of the extract and gentamicin. These findings offer novel light on the antibacterial activity of Sorbus aucuparia Romanian cultivars, as well as their cell-protective ability in renal cell injury. Full article
(This article belongs to the Special Issue Antioxidant Activity of Plant Extracts—Volume II)
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