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Beyond oxidative stress: an immunologist’s guide to reactive oxygen species

Carl Nathan, +1 more
- 01 May 2013 - 
- Vol. 13, Iss: 5, pp 349-361
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TLDR
ROS chemistry and their pleiotropy make them difficult to localize, to quantify and to manipulate — challenges the authors must overcome to translate ROS biology into medical advances.
Abstract
Reactive oxygen species (ROS) react preferentially with certain atoms to modulate functions ranging from cell homeostasis to cell death. Molecular actions include both inhibition and activation of proteins, mutagenesis of DNA and activation of gene transcription. Cellular actions include promotion or suppression of inflammation, immunity and carcinogenesis. ROS help the host to compete against microorganisms and are also involved in intermicrobial competition. ROS chemistry and their pleiotropy make them difficult to localize, to quantify and to manipulate — challenges we must overcome to translate ROS biology into medical advances.

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Phytochemical contents, antioxidant activity, and anticancer activity of three common guava cultivars in Thailand

TL;DR: The results of the present study suggest that Thai guava fruits possess potential antioxidant and anticancer activity due to the presence of different phytochemicals.
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Maternal intake of trans-unsaturated or interesterified fatty acids during pregnancy and lactation modifies mitochondrial bioenergetics in the liver of adult offspring in mice.

TL;DR: Maternal consumption of trans-unsaturated and interesterified fat affected offspring health by compromising mitochondrial bioenergetics and lipid metabolism in the liver, and modifications in FA composition possibly affected liver mitochondrial function.
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Structure, molecular modification and anti-tumor activity of melanin from Lachnum singerianum

TL;DR: Investigation of intracellular melanin extracted from Lachnum singerianum YM296 mycelium suggested that LIM-a and HLIM-a may repress tumor growth through activating the immune response and immunohistochemistry analysis and cytokines detection suggested that the latter had significant anti-tumor activity.

Oxidative stress in breast and gynaecological carcinogenesis

Henri Sova
TL;DR: Results indicate that in breast cancer and endometriosis-associated ovarian cancer, a high level of ROS-derived DNA damage could be significant factor in the initiation stage of carcinogenesis, whereas in later stages carcinomas benefit from lower ROS levels that support tumour growth and survival via cellular signalling.
Journal ArticleDOI

Proinflammatory Cytokines Predict Brain Metabolite Concentrations in the Anterior Cingulate Cortex of Patients With Bipolar Disorder.

TL;DR: Investigating whether a wide panel of inflammatory markers can predict brain metabolite concentrations of glutamate, myo-inositol, N-acetylaspartate, and glutathione confirmed that inflammation in BD alters brain metabolism, through mechanisms possibly including the production of reactive oxygen species and glia activation.
References
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Journal ArticleDOI

Superoxide Dismutase AN ENZYMIC FUNCTION FOR ERYTHROCUPREIN (HEMOCUPREIN)

TL;DR: The demonstration that O2·- can reduce ferricytochrome c and tetranitromethane, and that superoxide dismutase, by competing for the superoxide radicals, can markedly inhibit these reactions, is demonstrated.
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Myeloid-derived suppressor cells as regulators of the immune system.

TL;DR: The origin, mechanisms of expansion and suppressive functions of MDSCs, as well as the potential to target these cells for therapeutic benefit are discussed.
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Targeting cancer cells by ROS-mediated mechanisms: a radical therapeutic approach?

TL;DR: It is argued that modulating the unique redox regulatory mechanisms of cancer cells might be an effective strategy to eliminate these cells.
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A role for mitochondria in NLRP3 inflammasome activation

TL;DR: It is shown that mitophagy/autophagy blockade leads to the accumulation of damaged, ROS-generating mitochondria, and this in turn activates the NLRP3 inflammasome, and may explain the frequent association of mitochondrial damage with inflammatory diseases.
Journal ArticleDOI

Biological defense mechanisms. The production by leukocytes of superoxide, a potential bactericidal agent.

TL;DR: O(2) (-) is made by leukocytes under circumstances which suggest that it may be involved in bacterial killing, and is identified as the agent responsible for the leukocyte-mediated reduction of cytochrome c.
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