Antioxidant and Anti-Inflammatory Potential of Populus nigra L. Buds †
National Institute for Chemical-Pharmaceutical Research and Development-ICCF Bucharest, Calea Vitan, No. 112, 3rd District, 031299 Bucharest, Romania
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Author to whom correspondence should be addressed.
†
Presented at the 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM, Bucharest, Romania, 27–29 October 2021.
Chem. Proc. 2022, 7(1), 18; https://doi.org/10.3390/chemproc2022007018
Published: 2 March 2022
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
Populus nigra L. (black poplar) (Salicaceae) is a deciduous tree widespread in Europe, Asia, Africa, and North America and found in meadows, wet depressions, streams, forests, plains, and low hills. The vegetal product has been described mainly to contain phenolic compounds, terpenoids, flavones, flavanones, and more than 48 phytocompounds in the essential oils [1]. The antioxidant and anti-inflammatory effects of poplar buds are widely known. This study aims at confirming these factors in a poplar-selective extract.
Preparation of extract: the vegetal material was extracted twice under reflux with 50% and 20% ethyl alcohol, and further, the extractive solutions were subjected to a liquid–liquid extraction with n-butyl alcohol. The combined butanolic solutions were evaporated to dryness (P fraction). Total polyphenolcarboxylic acids and flavones were spectrophotometrically quantifed [2]. For the determination of total antioxidant activity, the method of Prieto [3] was used, and nitric oxide (NO) production in endothelial cells was evaluated by the Griess colorimetric method [4].
Fraction P proves to have a strong antioxidant capacity with 5.57 mM ascorbic acid equivalent at 10 mg/mL (Figure 1). A line of human endothelial cells (HUVEC) was chosen to perform the experiment because several phases of the inflammatory process take place in the endothelium and, in addition, nitric oxide has an important role in modulating endothelial tone. The NO level in the cells treated with TNF-α is lowered by treatment with the P fraction (Figure 2).
This study confirmed the antioxidant and anti-inflammatory potential of a selective fraction isolated from poplar buds.
Author Contributions
Conceptualization and writing, A.G.; technological studies, A.G.; chemical analysis, A.G.; in vitro studies, V.V. and G.N.; supervision, V.V. All authors have read and agreed to the published version of the manuscript.
Funding
This research was supported by The Executive Unit for Financing Higher Education, Research, Development and Innovation (UEFISCDI) in the frame of the project 563PED/2020.
Institutional Review Board Statement
Not applicable.
Informed Consent Statement
Not applicable.
Data Availability Statement
Not applicable.
Conflicts of Interest
The authors declare no conflict of interest.
References
- Kis, B.; Avram, S.; Pavel, I.; Lombrea, A.; Buda, V.; Dehelean, C.; Soica, C.; Yerer, M.; Bojin, F.; Folescu, R.; et al. Recent Advances Regarding the Phytochemical and Therapeutic Uses of Populus nigra L., Buds. Plants 2020, 9, 1464. [Google Scholar] [CrossRef] [PubMed]
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Figure 1.
The total antioxidant capacity of the P fraction highlighted by the phosphomolybdenic acid method.
Figure 1.
The total antioxidant capacity of the P fraction highlighted by the phosphomolybdenic acid method.
Figure 2.
The effect of L-fraction administration on NO production in endothelial cells under basal conditions and after TNF-α stimulation.
Figure 2.
The effect of L-fraction administration on NO production in endothelial cells under basal conditions and after TNF-α stimulation.
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MDPI and ACS Style
Grigore, A.; Vulturescu, V.; Neagu, G. Antioxidant and Anti-Inflammatory Potential of Populus nigra L. Buds. Chem. Proc. 2022, 7, 18. https://doi.org/10.3390/chemproc2022007018
AMA Style
Grigore A, Vulturescu V, Neagu G. Antioxidant and Anti-Inflammatory Potential of Populus nigra L. Buds. Chemistry Proceedings. 2022; 7(1):18. https://doi.org/10.3390/chemproc2022007018
Chicago/Turabian StyleGrigore, Alice, Virginia Vulturescu, and Georgeta Neagu. 2022. "Antioxidant and Anti-Inflammatory Potential of Populus nigra L. Buds" Chemistry Proceedings 7, no. 1: 18. https://doi.org/10.3390/chemproc2022007018
