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Measuring reactive oxygen and nitrogen species with fluorescent probes: challenges and limitations.

TLDR
A critical analysis of the challenges and limitations of the most widely used fluorescent probes for detecting and measuring reactive oxygen and nitrogen species and proposed guidelines that will help present and future researchers with regard to the optimal use of selected fluorescent probes and interpretation of results are presented.
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This article is published in Free Radical Biology and Medicine.The article was published on 2012-01-01 and is currently open access. It has received 1423 citations till now.

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Molecular and biochemical alterations in tubular epithelial cells of patients with isolated methylmalonic aciduria

TL;DR: In this article, the authors established an in vitro model of tubular epithelial cells from patient urine (hTEC; 9 controls, 5 mut(0), 1 cblB) and found specific tubular markers (AQP1, UMOD, AQP2).
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Superoxide produced in the matrix of mitochondria enhances methylmercury toxicity in human neuroblastoma cells.

TL;DR: It is demonstrated that MeHg degradation is mediated by mitochondrial O2(-), specifically within the matrix of mitochondria when O2(-) is in adequate supply and amplified through its conversion to iHg and subsequent interaction with protein cysteine thiols (R-SH).
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Mitochondria as the Target of Hepatotoxicity and Drug-Induced Liver Injury: Molecular Mechanisms and Detection Methods

TL;DR: There is a need for advanced and integrative models and approaches more closely resembling liver physiology, which would take into account predisposing factors, to reduce the costs of drug development by the early prediction of potential mitochondrial toxicity during pre-clinical tests and, especially, prevent serious complications observed in clinical settings.
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Optimized real-time monitoring of glutathione redox status in single pyramidal neurons in organotypic hippocampal slices during oxygen-glucose deprivation and reperfusion

TL;DR: An optimized superfusion system with the capability of rapid and reproducible exchange of the solution bathing the OHSCs and using the signal from cotransfected tdTomato as an internal standard during calibration improves quantitative measurements of Grx1-roGFP2 redox status and allows EGSH to be determined.
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Spatial compartmentalization of free radical formation and mitochondrial heterogeneity in bivalve gills revealed by live-imaging techniques

TL;DR: Application of LIT to bivalve gills for ex-vivo analysis of gill physiology and mapping of ROS and RNS formation is highly compartmentalized in bivalves gills under unstressed conditions, highlighting the fact that studying ROS formation in tissue homogenates may not be adequate to understand the underlying mechanism in complex tissues.
References
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Book

Free radicals in biology and medicine

TL;DR: 1. Oxygen is a toxic gas - an introduction to oxygen toxicity and reactive species, and the chemistry of free radicals and related 'reactive species'
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ROS as signalling molecules: mechanisms that generate specificity in ROS homeostasis

TL;DR: The pathways that regulate ROS homeostasis are crucial for mitigating the toxicity of ROS and provide strong evidence about specificity in ROS signalling.
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Evaluation of the probe 2',7'-dichlorofluorescin as an indicator of reactive oxygen species formation and oxidative stress.

TL;DR: Data suggest that H2O2-Fe(2+)-derived oxidant is mainly responsible for the nonenzymatic oxidation of DCFH, which remains an attractive probe as an overall index of oxidative stress in toxicological phenomena.
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Reconciling the chemistry and biology of reactive oxygen species

TL;DR: This review examines how target selectivity and antioxidant effectiveness vary for different oxidants and highlights areas where greater understanding is required on the fate of oxidants generated by cellular NADPH oxidases and on the identification of oxidant sensors in cell signaling.
Journal Article

Flow cytometric studies of oxidative product formation by neutrophils: a graded response to membrane stimulation.

TL;DR: The data indicate that the DCFH oxidation assay is quantitatively related to the oxidative metabolic burst of PMNL, and they strongly suggest that the reaction is mediated by H2O2 generated by the PMNL.
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