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Joe mcCord

Damian M Bailey, Peter Rasmussen, Kevin A Evans, Aske M Bohm, Morten Zaar, Henning B Nielsen, Patrice Brassard, Nikolai B Nordsborg, Pernille H Homann, Peter B Raven, Jane McEneny, Ian S Young, Joe M McCord, Niels H Secher
This study examined to what extent the human cerebral and femoral circulation contribute to free radical formation during basal and exercise-induced responses to hypoxia. Healthy participants (5♂, 5♀) were randomly assigned single-blinded to normoxic (21% O2 ) and hypoxic (10% O2 ) trials with measurements taken at rest and 30min after cycling at 70% of maximal power output in hypoxia and equivalent relative and absolute intensities in normoxia. Blood was sampled from the brachial artery (a), internal jugular and femoral veins (v) for non-enzymatic antioxidants (HPLC), ascorbate radical (A•- , electron paramagnetic resonance spectroscopy), lipid hydroperoxides (LOOH) and low density lipoprotein (LDL) oxidation (spectrophotometry)...
May 30, 2018: Free Radical Biology & Medicine
Jamie L Lim, Susanne M A van der Pol, Wia Baron, Joe M McCord, Helga E de Vries, Jack van Horssen
Oligodendrocyte damage and loss are key features of multiple sclerosis (MS) pathology. Oligodendrocytes appear to be particularly vulnerable to reactive oxygen species (ROS) and cytokines, such as tumor necrosis factor-α (TNF), which induce cell death and prevent the differentiation of oligodendrocyte progenitor cells (OPCs). Here, we investigated the efficacy of sulforaphane (SFN), monomethyl fumarate (MMF) and Protandim to induce Nrf2-regulated antioxidant enzyme expression, and protect oligodendrocytes against ROS-induced cell death and ROS-and TNF-mediated inhibition of OPC differentiation...
September 7, 2016: Antioxidants (Basel, Switzerland)
Randy Strong, Richard A Miller, Adam Antebi, Clinton M Astle, Molly Bogue, Martin S Denzel, Elizabeth Fernandez, Kevin Flurkey, Karyn L Hamilton, Dudley W Lamming, Martin A Javors, João Pedro de Magalhães, Paul Anthony Martinez, Joe M McCord, Benjamin F Miller, Michael Müller, James F Nelson, Juliet Ndukum, G Ed Rainger, Arlan Richardson, David M Sabatini, Adam B Salmon, James W Simpkins, Wilma T Steegenga, Nancy L Nadon, David E Harrison
The National Institute on Aging Interventions Testing Program (ITP) evaluates agents hypothesized to increase healthy lifespan in genetically heterogeneous mice. Each compound is tested in parallel at three sites, and all results are published. We report the effects of lifelong treatment of mice with four agents not previously tested: Protandim, fish oil, ursodeoxycholic acid (UDCA) and metformin - the latter with and without rapamycin, and two drugs previously examined: 17-α-estradiol and nordihydroguaiaretic acid (NDGA), at doses greater and less than used previously...
October 2016: Aging Cell
David M Schnell, Daret St Clair
Dr. Joe McCord (Ph.D. 1970) is recognized here as a Redox Pioneer because he has published at least three articles on antioxidant/redox biology as first/last author that have been cited over 1000 times and has published at least 37 articles each cited over 100 times. Dr. McCord is known for the monumental discovery of the antioxidant superoxide dismutase (SOD) while a graduate student under fellow redox pioneer Irwin Fridovich and demonstrating its necessity to aerobic life. Beyond this, McCord's career is distinguished for bridging the gap from basic science to clinical relevance by showing the application of SOD and superoxide to human physiology, and characterizing the physiological functions of superoxide in inflammation, immunological chemotaxis, and ischemia-reperfusion injury, among other disease conditions...
January 1, 2014: Antioxidants & Redox Signaling
Joe M McCord, Irwin Fridovich
No abstract text is available yet for this article.
April 1, 2014: Antioxidants & Redox Signaling
Christina Lisk, Joe McCord, Swapan Bose, Tim Sullivan, Zoe Loomis, Eva Nozik-Grayck, Thies Schroeder, Karyn Hamilton, David C Irwin
Reactive oxygen species (ROS) formed during acute high altitude exposure contribute to cerebral vascular leak and development of acute mountain sickness (AMS). Nuclear factor (erythroid-derived 2)-related factor 2 (Nrf2) is a transcription factor that regulates expression of greater than 90% of antioxidant genes, but prophylactic treatment with Nrf2 activators has not yet been tested as an AMS therapy. We hypothesized that prophylactic activation of the antioxidant genome with Nrf2 activators would attenuate high-altitude-induced ROS formation and cerebral vascular leak and that some drugs currently used to treat AMS symptoms have an additional trait of Nrf2 activation...
October 2013: Free Radical Biology & Medicine
Danielle J Reuland, Joe M McCord, Karyn L Hamilton
Oxidative stress is a component of many human diseases, including cardiovascular diseases (CVD). Exercise and various phytochemicals activate nuclear factor (erythroid-derived 2)-like 2 (Nrf2), the master regulator of antioxidant defenses, and attenuate CVD. This review highlights Nrf2 regulation by exercise and phytochemicals and the role of Nrf2 as a therapeutic target in CVD.
July 2013: Exercise and Sport Sciences Reviews
Danielle J Reuland, Shadi Khademi, Christopher J Castle, David C Irwin, Joe M McCord, Benjamin F Miller, Karyn L Hamilton
Increased production of reactive oxygen species has been implicated in the pathogenesis of cardiovascular disease (CVD), and enhanced endogenous antioxidants have been proposed as a mechanism for regulating redox balance. Nuclear factor (erythroid-derived 2)-like 2 (Nrf2) is a transcriptional regulator of phase II antioxidant enzymes, and activation of Nrf2 has been suggested to be an important step in attenuating oxidative stress associated with CVD. A well-defined combination of five widely studied medicinal plants derived from botanical sources (Bacopa monniera, Silybum marianum (milk thistle), Withania somnifera (Ashwagandha), Camellia sinensis (green tea), and Curcuma longa (turmeric)) has been shown to activate Nrf2 and induce phase II enzymes through the antioxidant response element...
March 2013: Free Radical Biology & Medicine
Elise L Donovan, Joe M McCord, Danielle J Reuland, Benjamin F Miller, Karyn L Hamilton
Activation of NF-E2-related factor 2 (Nrf2) is a potential therapeutic intervention against endothelial cell oxidative stress and associated vascular disease. We hypothesized that treatment with the phytochemicals in the patented dietary supplement Protandim would induce Nrf2 nuclear localization and phase II antioxidant enzyme protein in human coronary artery endothelial cells (HCAECs), protecting against an oxidant challenge in an Nrf2- dependent manner. Protandim treatment induced Nrf2 nuclear localization, and HO-1 (778% of control ± 82...
2012: Oxidative Medicine and Cellular Longevity
Ellen L Burnham, Joe M McCord, Swapan Bose, Lou Ann S Brown, Robert House, Marc Moss, Jeanette Gaydos
Alcohol use disorders (AUDs), including alcohol abuse and dependence, have been linked to the development of acute lung injury (ALI). Prior clinical investigations suggested an association between AUDs and abnormal alveolar epithelial permeability mediated through pulmonary oxidative stress that may partially explain this relationship. We sought to determine if correcting pulmonary oxidative stress in the setting of AUDs would normalize alveolar epithelial permeability in a double-blinded, randomized, placebo-controlled trial of Protandim, a nutraceutical reported to enhance antioxidant activity...
April 1, 2012: American Journal of Physiology. Lung Cellular and Molecular Physiology
Colleen Glyde Julian, Enrique Vargas, Vaughn A Browne, Megan J Wilson, Abigail W Bigham, Carmelo Rodriguez, Joe M McCord, Lorna G Moore
Oxidative stress has been implicated in the uteroplacental ischemia characteristic of preeclampsia and small-for-gestational-age (SGA) birth, both of which are more common at high (>2500 m) vs low altitude. Since Andeans are protected relative to Europeans from the altitude-associated rise in SGA, we asked whether alterations in maternal antioxidant status or oxidative stress contributed to their protection. Enzymatic antioxidant (erythrocyte catalase and superoxide dismutase [SOD]) activity and a plasma marker of lipid peroxidation (8-iso-PGF2α) were measured during pregnancy and in the non-pregnant state in Andean or European residents of low (400 m) or high altitude (3600-4100 m)...
August 2012: Journal of Maternal-fetal & Neonatal Medicine
Brooks M Hybertson, Bifeng Gao, Swapan K Bose, Joe M McCord
For the past 40 years or so, oxidative stress has been increasingly recognized as a contributing factor in aging and in various forms of pathophysiology generally associated with aging. Our view of oxidative stress has been largely "superoxide-centric", as we focused on the pathological sources of this oxygen-derived free radical and the types of molecular havoc it can wreak, as well as on the protection provided by the antioxidant enzymes, especially the superoxide dismutases, catalases, and glutathione peroxidases...
August 2011: Molecular Aspects of Medicine
Remy Kachadourian, Subbiah Pugazhenthi, Kalpana Velmurugan, Donald S Backos, Christopher C Franklin, Joe M McCord, Brian J Day
Hydroxychalcones are naturally occurring compounds that continue to attract considerable interest because of their anti-inflammatory and antiangiogenic properties. They have been reported to inhibit the synthesis of the inducible nitric oxide synthase and to induce the expression of heme oxygenase-1. This study examines the mechanisms by which 2',5'-dihydroxychalcone (2',5'-DHC) induces an increase in cellular glutathione (GSH) levels using a cell line stably expressing a luciferase reporter gene driven by antioxidant-response elements (MCF-7/AREc32)...
September 15, 2011: Free Radical Biology & Medicine
Binata Joddar, Rashmeet K Reen, Michael S Firstenberg, Saradhadevi Varadharaj, Joe M McCord, Jay L Zweier, Keith J Gooch
Human saphenous veins (HSVs) are widely used for bypass grafts despite their relatively low long-term patency. To evaluate the role of reactive oxygen species (ROS) signaling in intima hyperplasia (IH), an early stage pathology of vein-graft disease, and to explore the potential therapeutic effects of up-regulating endogenous antioxidant enzymes, we studied segments of HSV cultured ex vivo in an established ex vivo model of HSV IH. Results showed that HSV cultured ex vivo exhibit an ~3-fold increase in proliferation and ~3...
March 15, 2011: Free Radical Biology & Medicine
Margaret B Clarke, Rachel Wright, David Irwin, Swapan Bose, Zachary Van Rheen, Rahul Birari, Kurt R Stenmark, Joe M McCord, Eva Nozik-Grayck
Delivery of recombinant superoxide dismutase to the lung is limited by its short half-life and poor tissue penetration. We hypothesized that a chimeric protein, SOD2/3, containing the enzymatic domain of manganese superoxide dismutase (SOD2) and the heparan-binding domain of extracellular superoxide dismutase (SOD3), would allow for the delivery of more sustained lung and pulmonary vascular antioxidant activity compared to SOD2. We administered SOD2/3 to rats by intratracheal (i.t.), intraperitoneal (i.p.), or intravenous (i...
December 15, 2010: Free Radical Biology & Medicine
Muhammad Muddasir Qureshi, Warren C McClure, Nicole L Arevalo, Rick E Rabon, Benjamin Mohr, Swapan K Bose, Joe M McCord, Brian S Tseng
Therapeutic options for Duchenne muscular dystrophy (DMD), the most common and lethal neuromuscular disorder in children, remain elusive. Oxidative damage is implicated as a pertinent factor involved in its pathogenesis. Protandim((R)) is an over-the-counter supplement with the ability to induce antioxidant enzymes. In this study we investigated whether Protandim((R)) provided benefit using surrogate markers and functional measures in the dystrophin-deficient (mdx)mouse model of DMD. Male 3-week-old mdx mice were randomized into two treatment groups: control (receiving standard rodent chow) and Protandim((R))-supplemented standard rodent chow...
June 1, 2010: Journal of Dietary Supplements
Delira Robbins, Xin Gu, Runhua Shi, Jianfeng Liu, Fei Wang, Jacqulyne Ponville, Joe M McCord, Yunfeng Zhao
Protandim, a well defined dietary combination of 5 well-established medicinal plants, is known to induce endogenous antioxidant enzymes, such as manganese superoxide dismutase (MnSOD). Our previous studies have shown through the induction of various antioxidant enzymes, products of oxidative damage can be decreased. In addition, we have shown that tumor multiplicity and incidence can be decreased through the dietary administration of Protandim in the two-stage skin carcinogenesis mouse model. It has been demonstrated that cell proliferation is accommodated by cell death during DMBA/TPA treatment in the two-stage skin carcinogenesis model...
July 30, 2010: PloS One
James A Imlay
Dr. Irwin Fridovich (Ph.D., 1955) is recognized here as a Redox Pioneer because as first/last author he has published at least 1 paper on antioxidant/redox biology that has been cited over 1000 times and has published at least 10 papers each cited over 100 times. In collaboration with his graduate student, Joe McCord, Dr. Fridovich discovered the activity of superoxide dismutase (SOD). Subsequently, he and his colleagues demonstrated that the enzyme is ubiquitous among aerobic biota and comprises a critical defense against oxidative stress...
February 1, 2011: Antioxidants & Redox Signaling
Damian M Bailey, Jane McEneny, Odile Mathieu-Costello, Robert R Henry, Philip E James, Joe M McCord, Sylvia Pietri, Ian S Young, Russell S Richardson
Mitochondrial free radical formation has been implicated as a potential mechanism underlying degenerative senescence, although human data are lacking. Therefore, the present study was designed to examine if resting and exercise-induced intramuscular free radical-mediated lipid peroxidation is indeed increased across the spectrum of sedentary aging. Biopsies were obtained from the vastus lateralis in six young (26 + or - 6 yr) and six aged (71 + or - 6 yr) sedentary males at rest and after maximal knee extensor exercise...
August 2010: Journal of Applied Physiology
Daniel Hernandez-Saavedra, Celia Quijano, Verónica Demicheli, José M Souza, Rafael Radi, Joe M McCord
We previously described a coding mutation (L60F) in the mitochondrial superoxide dismutase (SOD2) gene of the human T cell leukemia-derived cell line Jurkat. In cell extracts the L60F mutant enzyme showed unusual inhibition by thiol reagents not seen in wild-type enzyme. Here we compare the properties of purified recombinant L60F SOD2 with a previously described SOD2 mutant, I58T. Both mutant proteins display a weakened dimer-dimer interaction and thermal instability at 55 degrees C. Both I58T and L60F lose activity at 37 degrees C in the presence of 5 mM N-ethylmaleimide, whereas the wild-type SOD2 does not...
May 1, 2010: Free Radical Biology & Medicine
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