@article {1040, title = {Antimicrobial, Cyto and Genotoxic Activities of Equisetum hyemale}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {November 2019}, pages = {1563-1571}, type = {Research Article}, chapter = {1563}, abstract = {

The popular use of natural products has great benefits for the health of the human population. In this study we highlight Equisetum hyemale, belonging to the phylum Sphenophyta and the family Equisetaceae. Popularly, the stems of this plant are used for their diuretic, digestive, anti-anemic, and anti-inflammatory properties. Given this context, and the fact that the growth of antimicrobial resistance is a serious problem for global public health, this plant could be used as an alternative, to increase our therapeutic arsenal. Therefore, it is important to more clearly elucidate the complex structures present in plants, because these substances are mainly responsible for their beneficial and/or toxic effects. Thus, the objective of this study was evaluate the antimicrobial activity, cytotoxic and genotoxic potential of the phenolic compounds separately. The substances luteolin, ferulic acid and coumarin were identified at high concentrations by ultra-high performance chromatography-electrospray ionization-mass spectrometry (UPLC-ESI-MS). Antimicrobial activity was elucidated through microdilution in broth; the phenolic compounds were able to inhibit the visible growth of the standard bacterial strains at low concentrations. Cytotoxicity was evaluated by MTT and genotoxicity was analysed through cellular damage using a Comet assay; the results showed that it did not present cytoxicity or genotoxicity at the corresponding concentrations. With this, we suggest that E. hyemale may be an alternative for the treatment of infections by microorganisms that are resistant to synthetic drugs.

}, keywords = {Antimicrobial activity, Cytotoxicity, Equisetum hyemale, Phenolic compounds}, doi = {10.5530/pj.2019.11.239}, author = {Camilla Filippi dos Santos Alves and Pauline Cordenonsi Bonez and Marcia de Souza Ebling and Camila Casagrande and Litiane Freitas and Carolina Dolwitsch and Fernanda Pires and Michele Rorato Sagrillo and Gerson Fernandes de Brum and Marli Matiko Anraku de Campos and Roberto Christ Vianna Santos} } @article {888, title = {Chemical Composition and Antioxidant Effect of Mentha rotundifolia Extracts}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {May 2019}, pages = {521-526}, type = {Original Article}, chapter = {521}, abstract = {

Aim: This report was aimed to investigate both the chemical composition and the antioxidant activity of two extracts from Mentha rotundifolia aerial parts. Methods: Aqueous and acetonic extracts were obtained by decoction and Soxhlet apparatus, respectively. Total polyphenols contents were determined using Folin- Ciocalteu reagent whereas flavonoids were evaluated by AlCl3 method. LC-MS/MS method was carried out to reveal the phytochemical composition of extracts. Some tests were used to evaluate the in vitro antioxidant activity of extracts such as DPPH free radical scavenging assay, ABTS+ radical cation decolorization assay, OH{\textbullet} radical scavenging assay, ferrous ion chelating, reducing power and β-caroten/linoleic acid bleaching assay. Results: The results showed that the aqueous extract was richer on polyphenols and flavonoids comparing to the acetonic extract. The analysis by LC-MS/MS allowed to identify many phenolic compounds in extracts, predominated by rosmarinic acid. In addition, the extracts were found to possess a significant antioxidant activity. Conclusion: Accordingly, it can be concluded that M. rotundifolia is quite rich in phenolic compounds and has a good antioxidant activity.

}, keywords = {antioxidant activity, Extraction, LC-MS/MS, Mentha rotundifolia, Phenolic compounds}, doi = {10.5530/pj.2019.11.83}, author = {Ferdjioui Siham and Belhattab Rachid and Raed M Al-Zoubi} }