Medicinal and biological values of Callistemon viminalis extracts: History, current situation and prospects

Salem, Mohamed Z. M.; EL-Hefny, Mervat; Nasser, Ramadan A.; Ali, Hayssam M.; El-Shanhorey, Nader A.; Elansary, Hosam O.

doi:10.1016/j.apjtm.2017.03.015

Cited by 41 publications

(32 citation statements)

References 43 publications

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“…This resistance had been attributed to the additional outer membrane (this is likely the case in our study) and that most resistant bacterium was D. solani . Finally, the essential oils compositions and percentages obtained from this study are comparable to studies on geranium [ 53 ], citrus [ 54 ], C. viminalis [ 55 ], R. officinallis [ 47 ], Artimisia [ 45 ], and O. vulgare [ 44 ]. However, the essential oils composition of the current collection of horticultural crops differed in some cases from those reported in the literature for S. molle (mainly composed of pinene [ 56 ], T. occidentalis (mainly composed of thujone and fenchone [ 57 ] and O. vulgare (mainly composed of pulegone).…”

Section: Discussionsupporting

confidence: 80%

Effective antioxidant, antimicrobial and anticancer activities of essential oils of horticultural aromatic crops in northern Egypt

Elansary

Abdelgaleil

Mahmoud

et al. 2018

BMC Complement Altern Med

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BackgroundIdentifying ornamental plants as new natural antioxidant and antimicrobial sources is always of great importance for the ornamental and horticultural industries.MethodsThe antimicrobial activities of leaves and fruits peel essential oils of twelve ornamental and horticultural crops were determined by screening against wide spectrum of fungi and bacteria, and their respective in vitro antioxidant capacity was evaluated. Furthermore, the anticancer activities against several cancer cells, and one normal human cell line (HEK-293) were examined.ResultsOriganum vulgare L. essential oil showed the best antioxidant, antibacterial and anticancer activities compared to screened crops by means of the DPPH and linoleic acid assays for antioxidants, MIC and MBC values for antibacterial activities and IC50 for antiproliferative activities. Such important activities in O. vulgare was attributed to high pulegone ratio (77.45%) as revealed by the GC/MS assay. Rosmarinus officinallis L. essential oil showed the highest antifungal activities by means of lowest MIC and MFC values which might be attributed to 1, 8-cineole (19.60%), camphor (17.01%) and α-pinene (15.12%).ConclusionWe suggest that oxygenated monoterpenes (i.e. linalool, terpinen-4-ol and pulegone) and monoterpene hydrocarbons play an important role in the essential oil antioxidant, antibacterial, antifungal and anticancer activities of diverse Egyptian ornamental and horticultural crops. Some species showed bioactivities similar to standards compounds and might be suitable for pharmaceutical and food industries.

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Section: Discussionsupporting

confidence: 80%

Effective antioxidant, antimicrobial and anticancer activities of essential oils of horticultural aromatic crops in northern Egypt

Elansary

Abdelgaleil

Mahmoud

et al. 2018

BMC Complement Altern Med

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“…P- coumaric acid showed antifungal effects against Botrytis cinerea [ 67 ]. Quercetin has antifungal activities against C. albicans [ 68 , 69 , 70 ]. However, this is the first report on the antifungal activities of apigenin 5-glucoside.…”

Section: Discussionmentioning

confidence: 99%

Antioxidant and Biological Activities of Acacia saligna and Lawsonia inermis Natural Populations

Elansary

Szopa

Kubica

et al. 2020

Plants

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Acacia saligna and Lawsonia inermis natural populations growing in Northern Saudi Arabia might be a valuable source of polyphenols with potent biological activities. Using high-performance liquid chromatography–diode array detection (HPLC-DAD), several polyphenols were detected tentatively in considerable amounts in the methanolic leaf extracts of A. saligna and L. inermis. A. saligna mainly contained rutoside, hyperoside, quercetin 3-glucuronide, gallic acid and p-coumaric acid, whereas those of L. inermis contained apigenin 5-glucoside, apigetrin and gallic acid. Strong antioxidant activities were found in the leaf extracts of both species due to the presence of hyperoside, quercetin 3-glucuronide, gallic acid, isoquercetin, p-coumaric acid, quercitrin and rutoside. A. saligna and L. inermis leaf extracts as well as hyperoside, apigenin 5-glucoside, and quercetin 3-glucuronide significantly reduced reactive oxygen species accumulation in all investigated cancer cells compared to the control. Methanolic leaf extracts and identified polyphenols showed antiproliferative and cytotoxic activities against cancer cells, which may be attributed to necrotic cell accumulation during apoptotic periods. Antibacterial activities were also found in both species leaf extracts and were twice as high in A. saligna than L. inermis due to the high composition of rutoside and other polyphenols. Finally, strong antifungal activities were detected, which were associated with specific phenols such as rutoside, hyperoside, apigenin 5-glucoside and p-coumaric acid. This is the first study exploring the polyphenolic composition of A. saligna and L. inermis natural populations in northern Saudi Arabia and aiming at the detection of their biological activities.

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“…gracilis (Rehder) T.C.Ku and M. toringoides (Rehder) Hughes were obtained in the spring from the arboretum of the University of Guelph, Canada, and vouchered in both Alexandria University, Egypt (Hosam0001050-1052) and the University of Guelph. Bark samples (3 replicates) were dried by lyophilization (Labconco, California, USA) and powdered [3,52]. Of the dried powder (DW), 0.2 g was sonicated in a methanol extraction (10 mL, Chempur, Lublin, Poland) for 2 × 30 min at 30 • C (Sonic-2, POLSONIC, Poland).…”

Section: Plant Materials and Preparationmentioning

confidence: 99%

Malus baccata var. gracilis and Malus toringoides Bark Polyphenol Studies and Antioxidant, Antimicrobial and Anticancer Activities

et al. 2020

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Exploring new sources of polyphenols with biological activities that work against human diseases is the target of natural product studies. This study determined the polyphenol composition of the bark of Malus species M. baccata var. gracilis (Rehder) T.C.Ku and M. toringoides (Rehder) Hughes, using high-performance liquid chromatography with a diode-array detector (HPLC-DAD) analysis. The antiproliferative, cytotoxic, antioxidant and antimicrobial applications of these extracts, as well as the identified phenol, were studied. The HPLC-DAD analysis confirmed three polyphenols in the extracts out of the 21 screened compounds: protocatechuic acid, gallic acid, and catechin. The major constituents in M. baccata and M. toringoides were protocatechuic acid, at 3.16 and 7.15 mg 100 g−1 dry weight (DW), respectively, and catechin, at 5.55 and 6.80 mg 100 g−1 DW, respectively. M. baccata and M. toringoides bark extracts showed antioxidant activities using 2,2-diphenyl-1-picrylhydrazyl (DPPH), β-carotene bleaching, and ferric-reducing antioxidant power (FRAP) assays, which were attributed to the dominance of protocatechuic acid. The highest antiproliferative and cytotoxic effects were against Jurkat cells. Against MCF-7 and Hela cells, there was necrotic cell accumulation in the early apoptotic as well as the late apoptotic phase. The bark extracts showed noticeable antibacterial effects against Listeria monocytogenes, Bacillus cereus, and Escherichia coli. Protocatechuic acid showed comparable results to bark extracts. There were antifungal effects against Aspergillus ochraceus, A. niger, and Candida albicans, and the activities were higher than the commercial reagent. M. baccata and M. toringoides could be considered as a new source of phenolic acids, including protocatechuic acid with anticancer, antibacterial antifungal, and antioxidant-promising effects.

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Medicinal and biological values of Callistemon viminalis extracts: History, current situation and prospects

Cited by 41 publications

References 43 publications

Effective antioxidant, antimicrobial and anticancer activities of essential oils of horticultural aromatic crops in northern Egypt

Effective antioxidant, antimicrobial and anticancer activities of essential oils of horticultural aromatic crops in northern Egypt

Antioxidant and Biological Activities of Acacia saligna and Lawsonia inermis Natural Populations

Malus baccata var. gracilis and Malus toringoides Bark Polyphenol Studies and Antioxidant, Antimicrobial and Anticancer Activities

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