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https://www.readbyqxmd.com/read/29781053/expression-of-nox-family-genes-and-their-clinical-significance-in-colorectal-cancer
#1
Sang Yeon Cho, Ju Seok Kim, Hyuk Soo Eun, Sun Hyung Kang, Eaum Seok Lee, Seok Hyun Kim, Jae Kyu Sung, Byung Seok Lee, Hyun Yong Jeong, Hee Seok Moon
BACKGROUND: The NADPH oxidase (NOX) family is overexpressed in many cancers and is associated with cancer cell proliferation and metastasis; however, little is known about the role of the NOX family in colorectal cancer (CRC). AIMS: To identify the expression of the NOX family in CRC and to investigate the relationship between the expression of NOXs with the prognosis of the patients. METHODS: In the TCGA data portal, mRNA expression data were obtained from 41 normal samples and 458 CRC samples to analyze mRNA expression and gene alteration...
May 21, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29767672/blockade-of-tlr4-within-the-paraventricular-nucleus-attenuates-blood-pressure-by-regulating-ros-and-inflammatory-cytokines-in-prehypertensive-rats
#2
Mo-Lin Wang, Xiao-Jing Yu, Xiao-Guang Li, De-Zhi Pang, Qing Su, Roland Osei Saahene, Hong-Bao Li, Xu-Ying Mao, Kai-Li Liu, Li-Yan Fu, Ying Li, Guo-Qing Zhu, Yu-Ming Kang
Background: Toll like receptor 4 (TLR4) has been implicated in the progression of cardiovascular disease, including hypertension. However, the role of TLR4 in the development of prehypertension is uncertain. Methods: Prehypertensive rats were treated with 8% salt for 12 weeks to induce prehypertension. These rats were then given either TAK-242 selective TLR4 blocker, or vehicle by bilateral micro-injection to the paraventricular nucleus (PVN). Blood pressure and renal sympathetic nerve activity were recorded...
May 15, 2018: American Journal of Hypertension
https://www.readbyqxmd.com/read/29749464/methyl-ferulic-acid-exerts-anti-apoptotic-effects-on-l-02-cells-via-the-ros-mediated-signaling-pathway
#3
Li Li, Yujuan Zhong, Zuheng Ma, Chengfang Yang, Hanning Wei, Li Chen, Chen Li, Dan Wu, Ming Zhi Rong, Yongwen Li
The present study aimed to investigate the anti-apoptotic effects of methyl ferulic acid (MFA) on L-02 cell apoptosis induced by ethanol, and to elucidate the possible underlying mechanisms. L-02 cells were examined after being soaked in ethanol (400 mM) to allow the ethanol to permeate into the cells for 24 h. Cell survival was measured by MTT assay. Cell apoptosis was assessed by both flow cytometry and single-stranded DNA assays. Intracellular reactive oxygen species (ROS) production was determined using the 2',7'-dichlorofluorescein-diacetate dye...
April 26, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29734661/nad-p-h-oxidase-activity-in-the-small-intestine-is-predominantly-found-in-enterocytes-not-professional-phagocytes
#4
Randall L Lindquist, Jannike Bayat-Sarmadi, Ruth Leben, Raluca Niesner, Anja E Hauser
The balance between various cellular subsets of the innate and adaptive immune system and microbiota in the gastrointestinal tract is carefully regulated to maintain tolerance to the normal flora and dietary antigens, while protecting against pathogens. The intestinal epithelial cells and the network of dendritic cells and macrophages in the lamina propria are crucial lines of defense that regulate this balance. The complex relationship between the myeloid compartment (dendritic cells and macrophages) and lymphocyte compartment (T cells and innate lymphoid cells), as well as the impact of the epithelial cell layer have been studied in depth in recent years, revealing that the regulatory and effector functions of both innate and adaptive immune compartments exhibit more plasticity than had been previously appreciated...
May 4, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29731909/inhibition-of-nadph-oxidase-2-induces-apoptosis-in-osteosarcoma-the-role-of-reactive-oxygen-species-in-cell-proliferation
#5
Kazumasa Kitamoto, Yuji Miura, Sivasundaram Karnan, Akinobu Ota, Hiroyuki Konishi, Yoshitaka Hosokawa, Keiji Sato
Osteosarcomas (OS) are aggressive tumors that are characterized by dysregulated growth and resistance to apoptosis. Reactive oxygen species (ROS) are thought to be important signal transduction molecules in the regulation of cell growth. ROS-generating nicotinamide adenine dinucleotide phosphate oxidase ( NOX ) family enzymes have previously been suggested to be involved in neoplastic proliferation. To examine whether NOX -mediated generation of intracellular ROS confers anti-apoptotic activity, and thus a growth advantage, the current study first analyzed the mRNA expression of NOX family members by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) in five human OS cell lines...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29723859/upregulation-of-nox2-and-nox4-mediated-by-tgf-%C3%AE-signaling-pathway-exacerbates-cerebral-ischemia-reperfusion-oxidative-stress-injury
#6
Zheng Lou, Ai-Ping Wang, Xiao-Ming Duan, Guo-Huang Hu, Gui-Lin Song, Mei-Ling Zuo, Zhong-Bao Yang
BACKGROUND/AIMS: Ischemic stroke is still one of the leading debilitating diseases with high morbidity and mortality. NADPH oxidase (NOX)-derived reactive oxygen species (ROS) play an important role in cerebral ischemia/reperfusion (I/R) injury. However, the mechanism underlying the regulation of ROS generation is still not fully elucidated. This study aims to explore the role of transforming growth beta (TGF-β) signals in ROS generation. METHODS: Sprague-Dawley rats were subjected to I/R injury, and PC-12 cells were challenged by hypoxia/reoxygenation (H/R) and/or treated with activin receptor-like kinase (ALK5) inhibitor Sb505124 or siRNA against ALK5...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29717631/hypoxia-and-reactive-oxygen-species-as-modulators-of-endoplasmic-reticulum-and-golgi-homeostasis
#7
Daniela Mennerich, Sakari Kellokumpu, Thomas Kietzmann
SIGNIFICANCE: Eukaryotic cells execute various functions in subcellular compartments or organelles for which cellular redox homeostasis is of importance. Apart from mitochondria, hypoxia and stress mediated formation of reactive oxygen species (ROS) were shown to modulate endoplasmic reticulum (ER) and Golgi apparatus (GA) functions. Recent Advances: Research during the last decade has improved our understanding of disulfide bond formation, protein glycosylation and secretion as well as pH and redox homeostasis in the endoplasmic reticulum (ER) and Golgi apparatus (GA)...
May 2, 2018: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29710840/nadph-oxidases-and-mitochondria-in-vascular-senescence
#8
REVIEW
Gloria Salazar
Aging is the major risk factor in the development of cardiovascular diseases (CVDs), including hypertension, atherosclerosis, and myocardial infarction. Oxidative stress caused by overproduction of reactive oxygen species (ROS) and/or by reduced expression of antioxidant enzymes is a major contributor to the progression of vascular senescence, pathologic remodeling of the vascular wall, and disease. Both oxidative stress and inflammation promote the development of senescence, a process by which cells stop proliferating and become dysfunctional...
April 29, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29709706/argirein-alleviates-vascular-endothelial-insulin-resistance-through-suppressing-the-activation-of-nox4-dependent-o-2-production-in-diabetic-rats
#9
Qing Li, Jie Su, Shi-Jie Jin, Wei Wei, Xiao-Dong Cong, Xiao-Xue Li, Ming Xu
BACKGROUND: Insulin resistance in endothelial cells contributes to the development of cardiovascular disease in type 2 diabetes mellitus (T2DM). Therefore, there are great potential clinical implications in developing pharmacological interventions targeting endothelial insulin resistance. Our previous studies indicated that argirein which was developed by combining rhein with L-arginine by a hydrogen bond, could substantially relieved stress related exacerbation of cardiac failure and alleviated cardiac dysfunction in T2DM, which was associated with suppressing NADPH oxidase activity...
April 27, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29704496/salusin-%C3%AE-attenuates-hepatic-steatosis-and-atherosclerosis-in-high-fat-diet-fed-low-density-lipoprotein-receptor-deficient-mice
#10
Kun Tang, Fei Wang, Yi Zeng, XueMeng Chen, XiaoLe Xu
Salusin-α is an endogenous bioactive peptide and likely to prevent atherosclerosis. But its protective effect against atherosclerosis in vivo remains poorly understood. The aim of the present study was to determine the potential effects of salusin-α on atherosclerosis and its associated metabolic disorders in high fat diet (HFD)-fed low density lipoprotein receptor deficient (LDLr-/- ) mice, and also explore the possible underlying mechanisms involved. Our data showed that after 12 weeks treatment, salusin-α ameliorated HFD-induced weight gain, hyperlipidemia, and serum levels of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α)...
April 25, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29702192/pseudolaric-acid-b-triggers-ferroptosis-in-glioma-cells-via-activation-of-nox4-and-inhibition-of-xct
#11
Zongqi Wang, Ye Ding, Xuanzhong Wang, Shan Lu, Chongcheng Wang, Chuan He, Lei Wang, Meihua Piao, Guangfan Chi, Yinan Luo, Pengfei Ge
Ferroptosis is a form of programmed cell death decided by iron-dependent lipid peroxidation, but its role in glioma cell death remains unclear. In this study, we found Pseudolaric acid B (PAB) inhibited the viabilities of glioma cells in vitro and in vivo, which was accompanied by abnormal increases of intracellular ferrous iron, H2 O2 and lipid peroxidation, as well as depletion of GSH and cysteine. In vitro studies revealed that the lipid peroxidation and the cell death caused by PAB were both inhibited by iron chelator deferoxamine, but exacerbated by supplement of ferric ammonium citrate...
April 24, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29694386/attenuation-of-choroidal-neovascularization-by-dietary-intake-of-%C3%AF-3-long-chain-polyunsaturated-fatty-acids-and-lutein-in-mice
#12
Ryoji Yanai, Shang Chen, Sho-Hei Uchi, Tomoaki Nanri, Kip M Connor, Kazuhiro Kimura
Dietary ω-3 long-chain polyunsaturated fatty acids (LCPUFAs) and lutein each protect against age-related macular degeneration (AMD). We here examined the effects of ω-3 LCPUFAs and lutein supplementation in a mouse model of AMD. Mice were assigned to four groups: (1) a control group fed an ω-3 LCPUFA-free diet, (2) a lutein group fed an ω-3 LCPUFA-free diet with oral administration of lutein, (3) an ω-3 group fed an ω-3 LCPUFA-supplemented diet, and (4) an ω-3 + lutein group fed an ω-3 LCPUFA-supplemented diet with oral administration of lutein...
2018: PloS One
https://www.readbyqxmd.com/read/29691838/ros-autophagy-pathway-mediates-monocytes-human-umbilical-vein-endothelial-cells-adhesion-induced-by-apelin-13
#13
Meiqing Liu, Hening Li, Qun Zhou, Hong Zhao, Deguan Lv, Jiangang Cao, Jinyong Jiang, Mingzhu Tang, Di Wu, Jiaqi Liu, Lele Wu, Haoliang Hu, Lu He, Shifang Huang, Zhe Chen, Lanfang Li, Linxi Chen
Apelin is the endogenous ligand of APJ receptor. Both monocytes (MCs) and human umbilical vein endothelial cells (HUVECs) express apelin and APJ, which play important roles in the physiological processes of atherosclerosis. Our previous research indicated that apelin-13 promoted MCs-HUVECs adhesion. Here, we further explore the mechanism responsible for MCs-HUVECs adhesion induced by apelin-13. Apelin-13 promoted reactive oxygen species (ROS) generation and NOX4 expression in HUVECs. Apelin-13 inducedautophagy, increased proteins beclin1 and LC3-II/I expression and induced autophagy flux in HUVECs, which was blocked by NAC, catalase and DPI...
April 24, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29689558/fibulin-3-attenuates-phosphate-induced-vascular-smooth-muscle-cell-calcification-by-inhibition-of-oxidative-stress
#14
Trang T D Luong, Nadeshda Schelski, Beate Boehme, Manousos Makridakis, Antonia Vlahou, Florian Lang, Burkert Pieske, Ioana Alesutan, Jakob Voelkl
BACKGROUND/AIMS: Fibulin-3, an extracellular matrix glycoprotein, inhibits vascular oxidative stress and remodeling in hypertension. Oxidative stress is prevalent in chronic kidney disease (CKD) patients and is an important mediator of osteo-/chondrogenic transdifferentiation and calcification of vascular smooth muscle cells (VSMCs) during hyperphosphatemia. Therefore, the present study explored the effects of Fibulin-3 on phosphate-induced vascular calcification. METHODS: Experiments were performed in primary human aortic smooth muscle cells (HAoSMCs) treated with control or with phosphate without or with additional treatment with recombinant human Fibulin-3 protein or with hydrogen peroxide as an exogenous source of oxidative stress...
April 18, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29684820/increased-oxidative-stress-mediates-the-antitumor-effect-of-parp-inhibition-in-ovarian-cancer
#15
Dong Hou, Zhaojian Liu, Xiuhua Xu, Qiao Liu, Xiyu Zhang, Beihua Kong, Jian-Jun Wei, Yaoqin Gong, Changshun Shao
PARP inhibitors have been widely tested in clinical trials, especially for the treatment of breast cancer and ovarian cancer, and were shown to be highly successful. Because PARP primarily functions in sensing and repairing DNA strand breaks, the therapeutic effect of PARP inhibition is generally believed to be attributed to impaired DNA repair. We here report that oxidative stress is also increased by PARP inhibition and mediates the antitumor effect. We showed that PARP1 is highly expressed in specimens of high grade serous ovarian carcinoma and its activity is required for unperturbed proliferation of ovarian cancer cells...
March 30, 2018: Redox Biology
https://www.readbyqxmd.com/read/29682153/antioxidant-and-anti-inflammatory-effects-of-blueberry-anthocyanins-on-high-glucose-induced-human-retinal-capillary-endothelial-cells
#16
Wuyang Huang, Zheng Yan, Dajing Li, Yanhong Ma, Jianzhong Zhou, Zhongquan Sui
Blueberries possess abundant anthocyanins, which benefit eye health. The purpose of this study was to explore the protective functional role of blueberry anthocyanin extract (BAE) and its predominant constituents, malvidin (Mv), malvidin-3-glucoside (Mv-3-glc), and malvidin-3-galactoside (Mv-3-gal), on high glucose- (HG-) induced injury in human retinal capillary endothelial cells (HRCECs). The results showed that BAE, Mv, Mv-3-glc, and Mv-3-gal enhanced cell viability ( P < 0.05 versus the HG group at 24 h); decreased the reactive oxygen species (ROS, P < 0...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29675997/hearing-vulnerability-after-noise-exposure-in-a-mouse-model-of-reactive-oxygen-species-overproduction
#17
Shigefumi Morioka, Hirofumi Sakaguchi, Taro Yamaguchi, Yuzuru Ninoyu, Hiroaki Mohri, Takashi Nakamura, Yasuo Hisa, Kiyokazu Ogita, Naoaki Saito, Takehiko Ueyama
Previous studies have convincingly argued that reactive oxygen species (ROS) contribute to the development of several major types of sensorineural hearing loss, such as noise-induced hearing loss (NIHL), drug-induced hearing loss, and age-related hearing loss. However, the underlying molecular mechanisms induced by ROS in these pathologies remain unclear. To resolve this issue, we established an in vivo model of ROS overproduction by generating a transgenic (TG) mouse line expressing the human NADPH oxidase 4 (NOX4, NOX4-TG mice), which is a constitutively active ROS-producing enzyme that does not require stimulation or an activator...
April 20, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29674975/possible-role-of-nadph-oxidase-4-in-angiotensin-ii-induced-muscle-wasting-in-mice
#18
Tomoyasu Kadoguchi, Kazunori Shimada, Hiroshi Koide, Tetsuro Miyazaki, Tomoyuki Shiozawa, Shuhei Takahashi, Tatsuro Aikawa, Shohei Ouchi, Kenichi Kitamura, Yurina Sugita, Al Shahi Hamad, Mitsuhiro Kunimoto, Yayoi Sato-Okabayashi, Koji Akita, Kikuo Isoda, Hiroyuki Daida
Background: Muscle wasting is a debilitating phenotype associated with chronic heart failure (CHF). We have previously demonstrated that angiotensin II (AII) directly induces muscle wasting in mice through the activation of NADPH oxidase (Nox). In this study, we tested the hypothesis that deficiency of NADPH oxidase 4 (Nox4), a major source of oxidative stress, ameliorates AII-induced muscle wasting through the regulation of redox balance. Methods and Results: Nox4 knockout (KO) and wild-type (WT) mice were used...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29674345/quantitative-interaction-analysis-permits-molecular-insights-into-functional-nox4-nadph-oxidase-heterodimer-assembly
#19
Sharon O'Neill, Magalie Mathis, Lidija Kovacic, Suisheng Zhang, Juergen Reinhardt, Dimitri Scholz, Ulrich Schopfer, Rochdi Bouhelal, Ulla G Knaus
Protein-protein interactions critically regulate many biological systems, but quantifying functional assembly of multi-pass membrane complexes in their native context is still challenging. Here, we combined modeling-assisted protein modification and information from human disease variants with a minimal-size fusion tag, split-luciferase-based approach to probe assembly of the NADPH oxidase 4 (NOX4)-p22phox enzyme, an integral membrane complex with unresolved structure, which is required for electron transfer and generation of reactive oxygen species (ROS)...
April 19, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29672130/nadph-oxidase-4-derived-superoxide-mediates-flow-stimulated-nkcc2-activity-in-thick-ascending-limbs
#20
Fara Saez, Nancy J Hong, Jeffrey L Garvin
Luminal flow augments sodium reabsorption in the thick ascending limb more than can be explained by increased ion delivery. This segment reabsorbs 30% of the filtered load of sodium, playing a key role in its homeostasis. Whether flow elevations enhance Na/K/2Cl cotransporter (NKCC2) activity and the second messenger involved are unknown. We hypothesized that raising luminal flow augments NKCC2 activity by enhancing O2 - production by NADPH oxidase 4 (NOX4). NKCC2 activity was measured in thick ascending limbs perfused at either 5 or 20 nl/min with and without inhibitors of O2 - production...
April 19, 2018: American Journal of Physiology. Renal Physiology
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