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Articles 1 - 9 of 9
Full-Text Articles in Medicine and Health Sciences
Alpha-Lipoic Acid Prevents Atrial Electrical And Structural Remodeling Via Inhibition Of Nadph Oxidase In A Rabbit Rapid Atrial Pacing Model, Lei Chen, Wen Gao, Yameng Shao, Chenggang Li, Yuan Lu
Alpha-Lipoic Acid Prevents Atrial Electrical And Structural Remodeling Via Inhibition Of Nadph Oxidase In A Rabbit Rapid Atrial Pacing Model, Lei Chen, Wen Gao, Yameng Shao, Chenggang Li, Yuan Lu
Turkish Journal of Medical Sciences
Background/aim: Alpha-lipoic acid (ALA) is a natural compound, one of the natural antioxidants with high activity. In the NADPH oxidase family, NADPH oxidase 4 (NOX4) is an important subunit participating in the production of ROS. NADPH oxidase 2 (NOX2) can form active NADPH oxidase complexes when binding to several other subunits in the cytoplasm, and NOX2 is its major functional subunit. Rapid atrial pacing (RAP) model was constructed to study the effects of ALA on electrical and structural remodeling in rabbits. Materials and methods: Thirty rabbits were divided into SHAM group, RAP group and ALA+RAP group. Their right atriums were …
Understanding The Role Of Homoeopathic Preparation Of Berberis Vulgaris In Mitigation Of Sodium Oxalate- Induced Hyperoxaluria: An Experimental Approach, Bhavani Tamilarasan, Porkodi Karthikeyan, Pugazhendhi Kannan, Kalaiselvi Periandavan, Raj Manchanda, Anil Khurana, Debadatta Nayak, Shanthi Palainivelu
Understanding The Role Of Homoeopathic Preparation Of Berberis Vulgaris In Mitigation Of Sodium Oxalate- Induced Hyperoxaluria: An Experimental Approach, Bhavani Tamilarasan, Porkodi Karthikeyan, Pugazhendhi Kannan, Kalaiselvi Periandavan, Raj Manchanda, Anil Khurana, Debadatta Nayak, Shanthi Palainivelu
Indian Journal of Research in Homoeopathy
Background: Hyperoxaluria and calcium oxalate crystal deposition in the kidneys lead to overproduction of reactive oxygen species, resulting in the development of oxidative stress and renal injury. At the cellular levels, mitochondria and NADPH oxidase involved in reactive oxygen species production play a crucial role in the pathogenesis of hyperoxaluria-induced renal injury. Objective: The objective was to investigate the therapeutical effect of homoeopathic drug Berberis vulgaris, a potent antioxidant, upon regulation of NADPH oxidase against acute high-grade sodium oxalate-induced hyperoxaluria in rats. Materials and Methods: Hyperoxaluria was induced in male Wistar rats by administering a single dose of sodium oxalate …
Nadph Oxidase-Derived Superoxide Production During Coxsackie B Virus Infection Fuels Macrophage Activation To Accelerate Type 1 Diabetes, Ashley R. Burg
Nadph Oxidase-Derived Superoxide Production During Coxsackie B Virus Infection Fuels Macrophage Activation To Accelerate Type 1 Diabetes, Ashley R. Burg
All ETDs from UAB
Type 1 diabetes (T1D) is a chronic inflammatory autoimmune disease in which autoreactive T cells selectively destroy insulin-producing pancreatic β-cells. While genetic predisposition underlies susceptibility, environmental factors are proposed to play the important role of triggering the activation of autoimmunity in T1D individuals. Viral infections, particularly by Coxsackie B viruses, are highly suspected as a precipitating event. However, the exact molecular mechanism for how viral infections elicit β-cell-specific autoimmunity remains unclear. Rodent models of virus-induced T1D suggest it is through bystander activation, during which innate antiviral responses to pancreas-tropic viral infections create an inflammatory milieu that breaks the peripheral tolerance …
Nadph Oxidase-Derived Superoxide: A Potentiator Of Autoimmune Responses In Type 1 Diabetes, Lindsey E. Padgett
Nadph Oxidase-Derived Superoxide: A Potentiator Of Autoimmune Responses In Type 1 Diabetes, Lindsey E. Padgett
All ETDs from UAB
Type 1 Diabetes (T1D) is an autoimmune disease culminating in pancreatic β-cell destruction, inducing reactive oxygen species (ROS), pro-inflammatory cytokines, and islet-infiltrating leukocutes. Macrophages, one of the first islet-infiltrating cells in T1D, secrete ROS and pro-inflammatory cytokines, which lyse pancreatic β-cells and activate diabetogenic T cells to further propagate β-cell destruction, while autoreactive CD4 T cells recruit islet-infiltrating, pro-inflammatory, M1 macrophages, and enhance CD8 T cell cytotoxicity. We previously demonstrated the importance of NADPH oxidase (NOX)-derived ROS synthesis in T1D, as Non-obese diabetic (NOD) mice lacking NOX-derived superoxide (NOD.Ncf1m1J) exhibited a delay in spontaneous and adoptive transfer of T1D. In …
Over-Expressed Copper/Zinc Superoxide Dismutase Localizes To Mitochondria In Neurons Inhibiting The Angiotensin Ii-Mediated Increase In Mitochondrial Superoxide, Shumin Li, Adam J. Case, Rui-Fang Yang, Harold D. Schultz, Matthew C. Zimmerman
Over-Expressed Copper/Zinc Superoxide Dismutase Localizes To Mitochondria In Neurons Inhibiting The Angiotensin Ii-Mediated Increase In Mitochondrial Superoxide, Shumin Li, Adam J. Case, Rui-Fang Yang, Harold D. Schultz, Matthew C. Zimmerman
Journal Articles: Cellular & Integrative Physiology
Angiotensin II (AngII) is the main effector peptide of the renin-angiotensin system (RAS), and contributes to the pathogenesis of cardiovascular disease by exerting its effects on an array of different cell types, including central neurons. AngII intra-neuronal signaling is mediated, at least in part, by reactive oxygen species, particularly superoxide (O2 (•-)). Recently, it has been discovered that mitochondria are a major subcellular source of AngII-induced O2 (•-). We have previously reported that over-expression of manganese superoxide dismutase (MnSOD), a mitochondrial matrix-localized O2 (•-) scavenging enzyme, inhibits AngII intra-neuronal signaling. Interestingly, over-expression of copper/zinc superoxide dismutase (CuZnSOD), which is believed …
Upregulation Of Reactive Oxygen Species During The Retrovirus Life Cycle And Their Roles In A Mutant Of Moloney Murine Leukemia Virus, Ts1-Mediated Neurodegeneration, Soo Jin Kim
Dissertations & Theses (Open Access)
Viral invasion of the central nervous system (CNS) and development of neurological symptoms is a characteristic of many retroviruses. The mechanism by which retrovirus infection causes neurological dysfunction has yet to be fully elucidated. Given the complexity of the retrovirus-mediated neuropathogenesis, studies using small animal models are extremely valuable. Our laboratory has used a mutant moloney murine leukemia retrovirus, ts1-mediated neurodegneration. We hypothesize that astrocytes play an important role in ts1-induced neurodegeneration since they are retroviral reservoirs and supporting cells for neurons. It has been shown that ts1 is able to infect astrocytes in vivo and in …
Arachidonyl Trifluoromethyl Ketone Ameliorates Experimental Autoimmune Encephalomyelitis Via Blocking Peroxynitrite Formation In Mouse Spinal Cord White Matter, Adam C. Vana, Shihe Li, Rachel Ribeiro, Flaubert Tchantchou, Yumin Zhang
Arachidonyl Trifluoromethyl Ketone Ameliorates Experimental Autoimmune Encephalomyelitis Via Blocking Peroxynitrite Formation In Mouse Spinal Cord White Matter, Adam C. Vana, Shihe Li, Rachel Ribeiro, Flaubert Tchantchou, Yumin Zhang
Uniformed Services University of the Health Sciences
Inhibition of phospholipase A2 (PLA2) has recently been found to attenuate the pathogenesis of experimental autoimmune encephalomyelitis (EAE), a commonly used animal model of multiple sclerosis (MS). However, the protective mechanisms that underlie PLA2 inhibition are still not well understood. In this study, we found that cytosolic PLA2 (cPLA2) was highly expressed in infiltrating lymphocytes and macrophages/microglia in mouse spinal cord white matter. Although cPLA2 is also expressed in spinal cord neurons and oligodendrocytes, there were no differences observed in these cell types between EAE and control animals. Arachidonyl trifluoromethyl ketone (AACOCF3), …
Distinct Role Of Nitric Oxide And Peroxynitrite In Mediating Oligodendrocyte Toxicity In Culture And In Experimental Autoimmune Encephalomyelitis, S. Li, A. C. Vana, R. Ribeiro, Y. Zhang
Distinct Role Of Nitric Oxide And Peroxynitrite In Mediating Oligodendrocyte Toxicity In Culture And In Experimental Autoimmune Encephalomyelitis, S. Li, A. C. Vana, R. Ribeiro, Y. Zhang
Uniformed Services University of the Health Sciences
Nitric oxide has been implicated in the pathogenesis of multiple sclerosis. However, it is still unclear whether nitric oxide plays a protective role or is deleterious. We have previously shown that peroxynitrite, a reaction product of nitric oxide and superoxide, is toxic to mature oligodendrocytes (OLs). The toxicity is mediated by intracellular zinc release, phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), activation of 12-lipoxygenase (12-LOX) and the formation of reactive oxygen species (ROS). In this study, we found that the donors of nitric oxide, dipropylenetriamine NONOate (DPT NONOate) and diethylenetriamine NONOate (DETA NONOate), protected OLs from peroxynitrite or zinc-induced toxicity. …
The Nad(P)H Oxidase Homolog Nox4 Modulates Insulin-Stimulated Generation Of H202 And Plays An Integral Role In Insulin Signal Transduction, Kalyankar Mahadev, Hiroyuki Motoshima, Xiangdong Wu, Jean Marie Ruddy, Rebecca S. Arnold, Guangjie Cheng, J. David Lambeth, Barry J. Goldstein
The Nad(P)H Oxidase Homolog Nox4 Modulates Insulin-Stimulated Generation Of H202 And Plays An Integral Role In Insulin Signal Transduction, Kalyankar Mahadev, Hiroyuki Motoshima, Xiangdong Wu, Jean Marie Ruddy, Rebecca S. Arnold, Guangjie Cheng, J. David Lambeth, Barry J. Goldstein
Department of Medicine Faculty Papers
Insulin stimulation of target cells elicits a burst of H2O2 that enhances tyrosine phosphorylation of the insulin receptor and its cellular substrate proteins as well as distal signaling events in the insulin action cascade. The molecular mechanism coupling the insulin receptor with the cellular oxidant-generating apparatus has not been elucidated. Using reverse transcription-PCR and Northern blot analyses, we found that Nox4, a homolog of gp91phox, the phagocytic NAD(P)H oxidase catalytic subunit, is prominently expressed in insulin-sensitive adipose cells. Adenovirus-mediated expression of Nox4 deletion constructs lacking NAD(P)H or FAD/NAD(P)H cofactor binding domains acted in a dominant-negative …