Volume 2017, Issue 1 8416763
Review Article
Open Access

Oxidative Stress: Harms and Benefits for Human Health

Gabriele Pizzino

Corresponding Author

Gabriele Pizzino

Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy unime.it

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Natasha Irrera

Natasha Irrera

Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy unime.it

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Mariapaola Cucinotta

Mariapaola Cucinotta

Department of Biomedical Sciences, Dentistry and Morphological and Functional Images, University of Messina, Messina, Italy unime.it

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Giovanni Pallio

Giovanni Pallio

Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy unime.it

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Federica Mannino

Federica Mannino

Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy unime.it

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Vincenzo Arcoraci

Vincenzo Arcoraci

Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy unime.it

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Francesco Squadrito

Francesco Squadrito

Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy unime.it

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Domenica Altavilla

Domenica Altavilla

Department of Biomedical Sciences, Dentistry and Morphological and Functional Images, University of Messina, Messina, Italy unime.it

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Alessandra Bitto

Alessandra Bitto

Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy unime.it

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First published: 27 July 2017
Citations: 3,122
Academic Editor: Victor M. Victor

Abstract

Oxidative stress is a phenomenon caused by an imbalance between production and accumulation of oxygen reactive species (ROS) in cells and tissues and the ability of a biological system to detoxify these reactive products. ROS can play, and in fact they do it, several physiological roles (i.e., cell signaling), and they are normally generated as by-products of oxygen metabolism; despite this, environmental stressors (i.e., UV, ionizing radiations, pollutants, and heavy metals) and xenobiotics (i.e., antiblastic drugs) contribute to greatly increase ROS production, therefore causing the imbalance that leads to cell and tissue damage (oxidative stress). Several antioxidants have been exploited in recent years for their actual or supposed beneficial effect against oxidative stress, such as vitamin E, flavonoids, and polyphenols. While we tend to describe oxidative stress just as harmful for human body, it is true as well that it is exploited as a therapeutic approach to treat clinical conditions such as cancer, with a certain degree of clinical success. In this review, we will describe the most recent findings in the oxidative stress field, highlighting both its bad and good sides for human health.

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