scholarly journals Phytomelatonin Regulates Keratinocytes Homeostasis Counteracting Aging Process

Cosmetics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 27 ◽  
Author(s):  
Francesca Ferri ◽  
Fabio Olivieri ◽  
Roberto Cannataro ◽  
Maria Cristina Caroleo ◽  
Erika Cione
Keyword(s):  
Free Radical ◽  
Skin Aging ◽  
Free Radical Scavenger ◽  
Free Radical Scavengers ◽  
Radical Scavenger ◽  
Intrinsic Factors ◽  
Keratinocyte Cell Line Hacat ◽  
Keratinocyte Cell ◽  
Ros Formation

Phytomelatonin (PM) gained the greatest interest for its application in agriculture and its use to improve human health conditions. PM based supplement has been shown to possess antioxidant capabilities because it functions as a free radical scavenger. Reactive Oxygen Species (ROS), induced by both intrinsic (peroxide production) and extrinsic (UV-radiation) factors are biochemical mediators crucial in skin aging. Skin aging is also regulated by specific microRNAs (miRs). Herein we have shown the effect of PM free radical scavengers on the human keratinocyte cell line HaCat and on ROS formation induced by both extrinsic and intrinsic factors as well as their capability to positively modulate a member of the hsa-miR-29 family linked to aging. Our result highlights the regulatory role of PM for the keratinocytes homeostasis.

scholarly journals Possible Protective Role of Melatonin in Pediatric Infectious Diseases and Neurodevelopmental Pathologies

2020 ◽  
Vol 10 (01) ◽  
pp. e104-e109
Author(s):  
Antonio Molina-Carballo ◽  
Antonio Emilio Jerez-Calero ◽  
Antonio Muñoz-Hoyos
Keyword(s):  
Endothelial Cell ◽  
Free Radical ◽  
Chronic Administration ◽  
Protective Role ◽  
Free Radical Scavenger ◽  
Radical Scavenger ◽  
Energetic Metabolism ◽  
Beneficial Effects ◽  
Molecular Crosstalk

AbstractMelatonin, produced in every cell that possesses mitochondria, acts as an endogenous free radical scavenger, and improves energetic metabolism and immune function, by complex molecular crosstalk with other intracellular compounds. There is greatly increasing evidence regarding beneficial effects of acute and chronic administration of high melatonin doses, in infectious, developmental, and degenerative pathologies, as an endothelial cell and every cell protectant.

scholarly journals Bioimmunological responses to Schistosoma mansoni and Fasciola gigantica worm homogenates either with or without saponin

2010 ◽  
Vol 4 (05) ◽  
pp. 334-344
Author(s):  
Amany Sayed Maghraby ◽  
Manal Abdel-Aziz Hamed ◽  
Sanaa Ahmed Ali
Keyword(s):  
Free Radical ◽  
Liver Function ◽  
Schistosoma Mansoni ◽  
Subcutaneous Administration ◽  
Free Radical Scavenger ◽  
Fasciola Gigantica ◽  
Free Radical Scavengers ◽  
Radical Scavenger ◽  
Immune Mediated ◽  
Mice Liver

Background: In this study, we evaluated the biochemical, immunological, histopathological and antischistosomal activities of Schistosoma mansoni or Fasciola gigantica worm homogenates mixed either with or without saponin that was extracted from Atriplex nummularia. Methodology: The immunization schedule was based on subcutaneous administration of two doses (50 μg /100 μl PBS) of each homogenate with time intervals of 15 days. After 15 days of the last homogenate inoculation, all mice were challenged with 100 Schistosoma mansoni cercariae and sacrificed after two months. Free radical scavengers and liver function enzymes were determined in mice liver. Worm counting and the histopathological picture of the liver were also done. Results: Immunization with Schistosoma or Fasciola worm homogenates, mixed either with or without saponin, recorded an amelioration of the free radical scavenger levels, liver function enzymes and reduction in worm burden, as well as improvement of the histological feature of the liver, the number and size of granuloma, evidence of increased immune reaction manifested by a lymphocytic cuff surrounding the granuloma, diminution of its fibrotic and collagen content, and destruction of Schistosoma ova. Conclusion: Fasciola or Schistosoma worm antigens mixed with or without saponin succeeded to eliminate the product of oxidative stress and assistance in immune-mediated destruction of eggs that ameliorate the histopathological picture of the liver cells and preserve its function.

Role of Free Radical Scavenger in Protection of Spinal Cord during Ischemia

1986 ◽  
Vol 41 (5) ◽  
pp. 551-556 ◽  
Author(s):  
John C. Coles ◽  
S. Naeem Ahmed ◽  
Harendra U. Mehta ◽  
John C.E. Kaufmann
Keyword(s):  
Spinal Cord ◽  
Free Radical ◽  
Free Radical Scavenger ◽  
Radical Scavenger

scholarly journals Celastrol and Melatonin Modify SIRT1, SIRT6 and SIRT7 Gene Expression and Improve the Response of Human Granulosa-Lutein Cells to Oxidative Stress

Antioxidants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1871
Author(s):  
Rita Martín-Ramírez ◽  
Rebeca González-Fernández ◽  
Jairo Hernández ◽  
Pablo Martín-Vasallo ◽  
Angela Palumbo ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Gene Expression ◽  
Free Radical ◽  
Cell Survival ◽  
Direct Effect ◽  
Free Radical Scavenger ◽  
Radical Scavenger ◽  
Protective Agent ◽  
Physiological Processes

An excess of oxidative stress (OS) may affect several physiological processes fundamental to reproduction. SIRT1, SIRT6 and SIRT7 are involved in protection stress systems caused by OS, and they can be activated by antioxidants such as celastrol or melatonin. In this study, we evaluate SIRT1, SIRT6 and SIRT7 gene expression in cultured human granulosa-lutein (hGL) cells in response to OS inductors (glucose or peroxynitrite) and/or antioxidants. Our results show that celastrol and melatonin improve cell survival in the presence and absence of OS inductors. In addition, melatonin induced SIRT1, SIRT6 and SIRT7 gene expression while celastrol only induced SIRT7 gene expression. This response was not altered by the addition of OS inductors. Our previous data for cultured hGL cells showed a dual role of celastrol as a free radical scavenger and as a protective agent by regulating gene expression. This study shows a direct effect of celastrol on SIRT7 gene expression. Melatonin may protect from OS in a receptor-mediated manner rather than as a scavenger. In conclusion, our results show increased hGL cells survival with melatonin or celastrol treatment under OS conditions, probably through the regulation of nuclear sirtuins’ gene expression.

Role of the Free Radical-Scavenger System in Aromatase Activity of the Human Ovary

1993 ◽  
Vol 39 (1) ◽  
pp. 22-27 ◽  
Author(s):  
Yuji Okatani ◽  
Nobuyuki Morioka ◽  
Akihiko Wakatsuki ◽  
Yuji Nakano ◽  
Yusuke Sagara
Keyword(s):  
Free Radical ◽  
Free Radical Scavenger ◽  
Radical Scavenger ◽  
Aromatase Activity ◽  
Human Ovary

Ultrastructural Evaluation of Ischemic Skeletal Muscle Reperfused with Oxygen Free Radical Scavengers

1988 ◽  
Vol 46 ◽  
pp. 262-263
Author(s):  
A. Mathur ◽  
R.C. Russell ◽  
A.C. Roth ◽  
D. Wagahoff
Keyword(s):  
Skeletal Muscle ◽  
Free Radical ◽  
White Male ◽  
Oxygen Free Radical ◽  
Free Radical Scavenger ◽  
Free Radical Scavengers ◽  
Radical Scavenger ◽  
Radical Scavengers ◽  
Tibialis Muscle ◽  
The Right

Skeletal muscle is very sensitive to ischemia. A prolonged preoperative ischemic interval decreases the chances for successful replantation of an amputated limb. Recent experimental work has implicated toxic oxygen free radicals produced during reperfusion of ischemic tissue to be responsible for some of the observed deleterious cellular changes. Selected oxygen free radical scavengers have been used to increase skeletal muscle survival following total ischemia. This study examined the effect of systemic administration of a superoxide free radical scavenger, superoxide dismutase (SOD), and a hydroxyl radical scavenger, dimethylsulfoxide (DMSO) just prior to reperfusion, on the ultrastructure and function of ischemic rabbit anterior tibialis muscle.White male New Zealand rabbits were used for this study. The right hind limb of each rabbit was made ischemic by dissecting and clamping the femoral artery and vein proximal to the bifurcation of the profundus artery and vein. A penrose tourniquet was also placed around the knee. The animals were divided into groups subjected to either 5 or 8 hours of ischemia.

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