ArticleInvestigative ophthalmology & visual science2015
Measuring In Vivo Free Radical Production by the Outer Retina.
Article in Investigative ophthalmology & visual science, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.
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Who cites it
29 citing papers in PubMed, 31 citations in OpenAlex.
- Reactive Oxygen Species Regulation Across Retinitis Pigmentosa Animal Models: A 25-Year Systematized Review.Molecular neurobiology · 2025Review
- Acetazolamide Challenge Changes Outer Retina Bioenergy-Linked and Anatomical OCT Biomarkers Depending on Mouse Strain.Investigative ophthalmology & visual science · 2024Article
- Blockade of IL-6R prevents preterm birth and adverse neonatal outcomes.EBioMedicine · 2023Article
- Polyunsaturated Lipids in the Light-Exposed and Prooxidant Retinal Environment.Antioxidants (Basel, Switzerland) · 2023Review
- CCR2-positive monocytes contribute to the pathogenesis of early diabetic retinopathy in mice.Diabetologia · 2023Article
- Transducin-Deficient Rod Photoreceptors Evaluated With Optical Coherence Tomography and Oxygen Consumption Rate Energy Biomarkers.Investigative ophthalmology & visual science · 2022Article
- Functional Changes Within the Rod Inner Segment Ellipsoid in Wildtype Mice: An Optical Coherence Tomography and Electron Microscopy Study.Investigative ophthalmology & visual science · 2022Article
- Neonatal Anesthesia and Oxidative Stress.Antioxidants (Basel, Switzerland) · 2022Review
- Superoxide free radical spin-lattice relaxivity: A quench-assisted MR study.Magnetic resonance in medicine · 2021Article
- Photoreceptor cells and RPE contribute to the development of diabetic retinopathy.Progress in retinal and eye research · 2021Review
- Correcting QUEST Magnetic Resonance Imaging-Sensitive Free Radical Production in the Outer Retina In Vivo Does Not Correct Reduced Visual Performance in 24-Month-Old C57BL/6J Mice.Investigative ophthalmology & visual science · 2021Article
- Sildenafil-evoked photoreceptor oxidative stress in vivo is unrelated to impaired visual performance in mice.PloS one · 2021Article
- Rod Photoreceptor Neuroprotection in Dark-Reared Pde6brd10 Mice.Investigative ophthalmology & visual science · 2020Article
- Bioenergetic Impairment of Triethylene Glycol Dimethacrylate- (TEGDMA-) Treated Dental Pulp Stem Cells (DPSCs) and Isolated Brain Mitochondria are Amended by Redox Compound Methylene BlueMaterials (Basel, Switzerland) · 2020Article
- Preventing diabetic retinopathy by mitigating subretinal space oxidative stressVisual neuroscience · 2020Review
- Age-related murine hippocampal CA1 laminae oxidative stress measured in vivo by QUEnch-assiSTed (QUEST) MRI: impact of isoflurane anesthesia.GeroScience · 2020Article
- Novel imaging biomarkers for mapping the impact of mild mitochondrial uncoupling in the outer retina in vivo.PloS one · 2020Article
- Novel QUEST MRI In Vivo Measurement of Noise-induced Oxidative Stress in the Cochlea.Scientific reports · 2019Article
- QUEST MRI assessment of fetal brain oxidative stress in utero.NeuroImage · 2019Article
- Outer Retinal Oxidative Stress Measured In Vivo Using QUEnch-assiSTed (QUEST) OCT.Investigative ophthalmology & visual science · 2019Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
Abstract
purposeExcessive and continuously produced free radicals in the outer retina are implicated in retinal aging and the pathogenesis of sight-threatening retinopathies, yet measuring outer retinal oxidative stress in vivo remains a challenge. Here, we test the hypothesis that continuously produced paramagnetic free radicals from the outer retina can be measured in vivo using high-resolution (22-μm axial resolution) 1/T1magnetic resonance imaging (MRI) without and with a confirmatory quench (quench-assisted MRI).
methodsLow-dose sodium iodate-treated and diabetic C57Bl6/J mice (and their controls), and rod-dominated (129S6) or cone-only R91W;Nrl-/- mice were studied. In dark-adapted groups, 1/T1 was mapped transretinally in vivo without or with (1) the antioxidant combination of methylene blue (MB) and α-lipoic acid (LPA), or (2) light exposure; in subgroups, retinal superoxide production was measured ex vivo (lucigenin).
resultsIn the sodium iodate model, retinal superoxide production and outer retina-specific 1/T1 values were both significantly greater than normal and corrected to baseline with MB+LPA therapy. Nondiabetic mice at two ages and 1.2-month diabetic mice (before the appearance of oxidative stress) had similar transretinal 1/T1 profiles. By 2.3 months of diabetes, only outer retinal 1/T1 values were significantly greater than normal and were corrected to baseline with MB+LPA therapy. In mice with healthy photoreceptors, a light quench caused 1/T1 of rods, but not cones, to significantly decrease from their values in the dark.
conclusionsQuench-assisted MRI is a feasible method for noninvasively measuring normal and pathologic production of free radicals in photoreceptors/RPE in vivo.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.