In vitro Scavenging Activity of Rosemary Extract and its Activity Against Some Pathogenic Microorganisms

2020 ◽  
Vol 23 (20) ◽  
Author(s):  
Huda Musleh Mahmood ◽  
Iman Abbas Khudhair ◽  
Gulboy Abdolmajeed Nasir ◽  
Ali Salah Abdulla AL-Shujairi
Keyword(s):  
Rosemary Extract ◽  
Scavenging Activity ◽  
Pathogenic Microorganisms

scholarly journals Potential antiviral agents of Rosmarinus officinalis extract against herpes viruses 1 and 2

2020 ◽  
Vol 40 (6) ◽  
Author(s):  
Wafa A. AL-Megrin ◽  
Norah A. AlSadhan ◽  
Dina M. Metwally ◽  
Razan A. Al-Talhi ◽  
Manal F. El-Khadragy ◽  
...  
Keyword(s):  
Superoxide Anion ◽  
Viral Infections ◽  
Antiviral Agents ◽  
Vero Cells ◽  
Rosmarinus Officinalis ◽  
Rosemary Extract ◽  
Scavenging Activity ◽  
Herpes Simplex Viruses ◽  
Hsv 1

Abstract Herpes simplex viruses 1 and 2 (HSV-1 and HSV-2) belong to the herpesviridae family and cause neurological disorders by infecting the nervous system. The present study aimed to investigate the effects of Rosmarinus officinalis L. (rosemary) extract against HSV-1 and HSV-2 in vitro. The antioxidant activity of this extract was investigated by superoxide anion and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free-radical assays. Rosemary extract was evaluated by an HSV-1 antiviral assay, in which viral replication in Vero cells was determined and quantified using a cytopathic effect assay. The present study showed that rosemary extract at 30 µg/ml caused 55% inhibition of HSV-1 plaques, whereas 40 µg/ml rosemary extract caused 65% inhibition of HSV-2 plaques. The extracts completely inhibited HSV-1 and HSV-2 plaque formation at 50 µg/ml. Scavenging activity of the superoxide anion radical was observed at 65.74 mg/ml, whereas 50% scavenging activity of the DPPH radical was observed at 67.34 mg/ml. These data suggest that rosemary extract may be suitable as a topical prophylactic or therapeutic agent for herpes viral infections. However, further research is required to elucidate the plant’s active constituents, which may be useful in drug development.

scholarly journals Combined Effects of Carotenoids and Polyphenols in Balancing the Response of Skin Cells to UV Irradiation

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1931
Author(s):  
Glenda Calniquer ◽  
Marina Khanin ◽  
Hilla Ovadia ◽  
Karin Linnewiel-Hermoni ◽  
David Stepensky ◽  
...  
Keyword(s):  
Cell Damage ◽  
Plasma Concentrations ◽  
Dermal Fibroblasts ◽  
Carnosic Acid ◽  
Rosemary Extract ◽  
Protective Effects ◽  
Skin Cells ◽  
Tomato Extract ◽  
Clinical Experiments

Oral carotenoids and polyphenols have been suggested to induce photo-protective effects. The aim of the study was to test whether the combination of carotenoids and polyphenols produce greater protective effects from UV-induced damage to skin cells. Such damage is characterized by inflammation and oxidative stress; thus, the photo-protective effect can be partially explained by modulating the nuclear factor kappa B (NFκB) and antioxidant response element/Nrf2 (ARE/Nrf2) transcription systems, known as important regulators of these two processes. Indeed, it was found in keratinocytes that carotenoids and polyphenols inhibit UVB-induced NFκB activity and release of cytokine IL-6. A combination of tomato extract with rosemary extract inhibited UVB-induced release of IL-6 more than each of the compounds alone. Moreover, this combination synergistically activated ARE/Nrf2 transcription systems. Inflammatory cytokines such as IL-6 and TNFα induce the expression of matrix metalloproteinases (MMPs), which leads to collagen breakdown; thus, it is important to note that carnosic acid reduced TNFα-induced MMP-1 secretion from human dermal fibroblasts. The in vitro results suggest beneficial effects of phytonutrient combinations on skin health. To assure that clinical experiments to prove such effects in humans are feasible, the human bioavailability of carotenoids from tomato extract was tested, and nearly a twofold increase in their plasma concentrations was detected. This study demonstrates that carotenoids and polyphenols cooperate in balancing UV-induced skin cell damage, and suggests that NFκB and ARE/Nrf2 are involved in these effects.

Synthesis and Evaluation of bis-Schiff Bases of Carbohydrazide as Antioxidant and Cytotoxic Agents

2021 ◽  
Vol 18 ◽  
Author(s):  
Sarosh Iqbal ◽  
Shumaila Kiran ◽  
Shahida Perveen ◽  
Rizwana Malik ◽  
Muhammad Taha ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Cytotoxic Agents ◽  
Scavenging Activity ◽  
Standard Drug ◽  
Age Related ◽  
Dpph Radical Scavenging ◽  
Better Than

Background & Introduction : Antioxidants are known to prevent oxidative stress-induced damage to the biomolecules and thus, delay the onset of cancers and many age-related diseases. Therefore, the development of novel and potent antioxidants is justified. Method: During this study, we synthesized symmetrical bis-Schiff bases of carbohydrazide 1-27, and evaluated their in vitro antioxidative activity and cytotoxic activity. Results: Among synthesized compounds, six compounds 20 (IC50 = 12.89 ± 0.02 µM), 16 (IC50 = 14.32 ± 0.43 µM), 17 (IC50 = 18.52 ± 0.83 µM), 19 (IC50 = 22.84 ± 0.62 µM), 24 (IC50 = 35.1 ± 0.82 µM) and 15 (IC50 = 40.03 ± 1.06 µM) showed an excellent 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, better than the standard butylatedhydroxyanisole (BHA) (IC50 = 44.6 ± 0.6 µM). Likewise, two compounds 16 (IC50 = 4.3 ± 1.3 µM) and 20 (IC50 = 6.6 ± 1.6 µM) showed oxidative burst scavenging activity better than the standard drug ibuprofen (IC50 = 11.2 ± 1.9 µM). Some synthesized compounds showed good to moderate toxicity against prostate cancer (PC-3) cell lines. Conclusion: This study has identified potent antioxidants and good cytotoxic agents with the potential to further investigate.

scholarly journals Elicited ROS Scavenging Activity, Photoprotective, and Wound-Healing Properties of Collagen-Derived Peptides from the Marine Sponge Chondrosia reniformis

Marine Drugs ◽  
2018 ◽  
Vol 16 (12) ◽  
pp. 465 ◽  
Author(s):  
Marina Pozzolini ◽  
Enrico Millo ◽  
Caterina Oliveri ◽  
Serena Mirata ◽  
Annalisa Salis ◽  
...  
Keyword(s):  
Wound Healing ◽  
Marine Sponge ◽  
Biological Effects ◽  
Marine Sponges ◽  
In Vitro Toxicity ◽  
Scavenging Activity ◽  
Ros Scavenging ◽  
General Chemical ◽  
Collagen Hydrolysates

Recently, the bioactive properties of marine collagen and marine collagen hydrolysates have been demonstrated. Although there is some literature assessing the general chemical features and biocompatibility of collagen extracts from marine sponges, no data are available on the biological effects of sponge collagen hydrolysates for biomedical and/or cosmetic purposes. Here, we studied the in vitro toxicity, antioxidant, wound-healing, and photoprotective properties of four HPLC-purified fractions of trypsin-digested collagen extracts—marine collagen hydrolysates (MCHs)—from the marine sponge C. reniformis. The results showed that the four MCHs have no degree of toxicity on the cell lines analyzed; conversely, they were able to stimulate cell growth. They showed a significant antioxidant activity both in cell-free assays as well as in H2O2 or quartz-stimulated macrophages, going from 23% to 60% of reactive oxygen species (ROS) scavenging activity for the four MCHs. Finally, an in vitro wound-healing test was performed with fibroblasts and keratinocytes, and the survival of both cells was evaluated after UV radiation. In both experiments, MCHs showed significant results, increasing the proliferation speed and protecting from UV-induced cell death. Overall, these data open the way to the use of C. reniformis MCHs in drug and cosmetic formulations for damaged or photoaged skin repair.

scholarly journals In vitro Antioxidant Potentials of Ethanol Extract of Unripe and Ripe Dennetia tripetala Fruits

2019 ◽  
pp. 1-8
Author(s):  
E. I. Akpakpan ◽  
E. N. Onyeike ◽  
C. U. Ogunka-Nnoka
Keyword(s):  
Vitamin C ◽  
Competitive Inhibition ◽  
Reducing Power ◽  
Ethanol Extract ◽  
Natural Antioxidants ◽  
In Vitro Models ◽  
Scavenging Activity ◽  
Fruit Extract ◽  
Ic50 Values

Dennettia tripetala fruit is a popular Nigerian fruit from the family of plant known as Annonaceae. The whole fruit (flesh and seed) is usually consumed as snacks and it is oftentimes consumed with local gin (ufofop in Ibibio or kaikai in Igbo) or added to dishes as spice due to its peculiar strong pepperish taste and sweet aroma. The present study is aimed at evaluating the antioxidant potentials of ethanol extract of ripe and unripe D. tripetala (DT) fruit in vitro. The antioxidant activity of the ethanol extract of DT was evaluated spectrophotometrically using various in vitro models like 1, 1-diphenyl-2-picryl-hydrazyl (DPPH) and hydrogen peroxide scavenging activity; metal chelating activity and reducing power. Vitamin C was used as the standard antioxidant.Unripe and ripe DT fruits, as well as vitamin C showed a competitive inhibition of DPPH and H2O2 free radicals. As concentration of the extracts increased from 20 to100 µg/mL, the % scavenging activity for vitamin C increased from 87.86 ± 0.11 to 90.66 ± 0.07 and for ripe DT fruits from 15.15 ± 0.24 to 25.52 ± 0.23, while for unripe, fruits values increased from 12.09 ± 0.35 to 23.06 ± 0.12. The IC50 values was highest in unripe (549.23) followed by ripe (276.63) and lowest in vitamin C (12.92) indicating that vitamin C was the best scavenger of DPPH radical. Similar trend was obtained for H2O2 scavenging activity as well as reducing power. Unripe DT fruit extract was more potent at chelating metal ions (IC50 was 95.38), followed by the standard ascorbic acid with IC50 of 97.03 and was lowest in ripe DT fruit extract with IC50 value of 124.66. Unripe and ripe DT are potent antioxidants in nature and may be used to supplement our diets as rich sources of natural antioxidants for health protection.

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