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Liu Y, Han D, Ma Q, Zheng Y, Lin Y, Yang C, Yang L. Prognostic value of NOX2 as a potential biomarker for lung adenocarcinoma using TCGA and clinical validation. Mol Med Rep 2023; 27:48. [PMID: 36633128 PMCID: PMC9879073 DOI: 10.3892/mmr.2023.12935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 12/09/2022] [Indexed: 01/11/2023] Open
Abstract
Lung adenocarcinoma (LUAD) is associated with high morbidity and mortality; therefore, effective biomarkers are essential. In recent years, a rapid increase in the efficiency of high‑throughput sequencing technologies and the continuous improvement of comprehensive online databases have facilitated the study of the genomic changes that affect tumor progression, including the identification of tumor biomarkers. Therefore, the identification of genes that may affect the progression and prognosis of LUAD is necessary. In the present study, the CIBERSORT and ESTIMATE bioinformatics packages were used to evaluate data from The Cancer Genome Atlas, including assessment of the proportion of tumor‑infiltrating immune cells in the tumor microenvironment, Cox regression analysis of differentially expressed genes and cross analysis of protein‑protein interaction networks. Myeloid cell NADPH oxidase isoform 2 (NOX2), an indispensable gene in the immune system, was demonstrated to serve a vital role in LUAD pathogenesis. Western blotting and immunohistochemistry confirmed that, at the protein level, NOX2 expression was increased in normal cells compared with cancer cells. Furthermore, reverse transcription‑quantitative PCR results at the mRNA level were consistent with these results, which confirmed that the abundance of NOX2 was significantly reduced in LUAD patients. NOX2 may be used as a novel marker and an independent prognostic indicator of LUAD. Its potential function was enriched in tumor immune and metabolic signaling pathways, which could provide clues for the study of the signaling pathways and molecular networks related to the disease progression of LUAD, which would be helpful for the assessment of prognosis in the clinical setting.
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Affiliation(s)
- Yingjie Liu
- College of Medical Laboratory, Weifang Medical University, Weifang, Shandong 261000, P.R. China
| | - Di Han
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, Shandong 266071, P.R. China
| | - Qihui Ma
- College of Medical Laboratory, Weifang Medical University, Weifang, Shandong 261000, P.R. China
| | - Yuanhang Zheng
- College of Medical Laboratory, Weifang Medical University, Weifang, Shandong 261000, P.R. China
| | - Yi Lin
- Department of Pathology, The People's Hospital of Fangzi District, Weifang, Shandong 261000, P.R. China
| | - Chunqing Yang
- College of Medical Laboratory, Weifang Medical University, Weifang, Shandong 261000, P.R. China
| | - Lun Yang
- Department of Thoracic Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China,Correspondence to: Dr Lun Yang, Department of Thoracic Surgery, The First Affiliated Hospital of Nanchang University, 17 Yongwai Main Street, Donghu, Nanchang, Jiangxi 330006, P.R. China, E-mail:
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Zhang L, Li Z, Xing C, Ma X, Xu R. The protective mechanism of folic acid on hyperhomocysteinemia-related arterial injury in spontaneously hypertensive rats: Folic acid against arterial inflammation. Vascular 2022; 30:988-998. [PMID: 34362270 DOI: 10.1177/17085381211036549] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Hypertension associated with hyperhomocysteinemia (HHcy) is correlated with a high risk of vascular diseases. Studies found that folic acid (FA) supplementation can reduce the risk of cardiovascular and cerebrovascular events. The aim of the present study was to explore the potential mechanisms of FA attenuating HHcy-related arterial injury in spontaneously hypertensive rats (SHRs). METHODS 24 SHRs were randomized into the control group, the HHcy group, and the HHcy + FA group (8 per group). The SHRs in the HHcy group and the HHcy + FA group were given DL-Hcy intraperitoneally to mimic hypertension associated with HHcy. The SHRs in the HHcy + FA group were given FA by gavage to mimic an FA-fortified diet. The histopathology and immunohistochemistry of rat aorta and carotid artery were analyzed, and the relative expression levels of immune/inflammation and oxidative stress molecules in arterial tissue were detected by quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot. RESULTS FA significantly reduced the expression levels of nuclear factor-κ-gene binding (NF-κB) p65/Rela and interleukin-6 (IL-6) in rat arterial tissues, as well as the levels of plasma HHcy and serum malondialdehyde (MDA) in hypertension associated with HHcy rats (p < 0.05). At the same time, FA significantly increased the serum superoxide dismutase (SOD) level in hypertension associated with HHcy rats, and even the SOD level of the HHcy + FA group was higher than that of the control group (p < 0.05). However, HHcy induced the opposite results of the above indicators in SHRs compared with the control group (p < 0.05). CONCLUSIONS The arterial protection mechanisms of FA are related to reducing the concentration of HHcy to eliminate the tissue toxicity of HHcy, inhibiting NF-κBp65/Rela/IL-6 pathway molecules to regulate inflammatory response, and promoting the potential anti-oxidative stress pathway molecules to reduce oxidative stress level.
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Affiliation(s)
- Lihua Zhang
- Shandong Provincial Qianfoshan Hospital, 74738Shandong University, Jinan, Shandong, China
- Department of Medicine, Jinan Maternity and Child Care Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Zhongliang Li
- Department of Women Healthcare, Jinan Maternity and Child Care Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Changcheng Xing
- 74738Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xiaoshan Ma
- Department of Medicine, Jinan Maternity and Child Care Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Rui Xu
- Shandong Provincial Qianfoshan Hospital, 74738Shandong University, Jinan, Shandong, China
- Department of Cardiology, 74738The First Affiliated Hospital of Shandong First Medical University, Jinan, China
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Zhang L, Li Z, Xing C, Gao N, Xu R. Folate Reverses NF-κB p65/Rela/IL-6 Level Induced by Hyperhomocysteinemia in Spontaneously Hypertensive Rats. Front Pharmacol 2021; 12:651582. [PMID: 34603014 PMCID: PMC8481771 DOI: 10.3389/fphar.2021.651582] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 08/03/2021] [Indexed: 11/19/2022] Open
Abstract
Hyperhomocysteinemia (HHcy) is derived from the abnormal metabolism of homocysteine (Hcy) and is related to metabolic-related diseases. In addition, HHcy combined with hypertension increases the risk of cardiovascular diseases (CVD). However, the mechanism of HHcy aggravating hypertensive arterial damage and the efficacy of folate (FA) as a beneficial supplement have not been fully elucidated. In this study, we established a rat HHcy model and a hypertension combined with HHcy model. Rat tail artery blood pressure (BP), plasma Hcy, serum superoxide dismutase (SOD), and malondialdehyde (MDA) were measured. Rat thoracic aorta was for pathological analysis after 12 weeks of the experiment. The relative expression levels of oxidative stress and immune/inflammation in rat arterial tissues were detected by quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting. The results demonstrated that the relative expression levels of oxidative stress and immune/inflammation were the highest in the hypertension combined with HHcy group, followed by the hypertension group. Compared with the hypertension group, the hypertension combined with HHcy group up-regulated the expression levels of interleukin-6 (IL-6) and nuclear factor-κ-gene binding (NF-κB) p65/Rela, but not NADPH oxidase (Nox). Furthermore, folate inhibited the expression of IL-6 and NF-κB p65/Rela, reduced the levels of MDA and HHcy, but significantly increased the SOD level. In conclusion, HHcy synergistically aggravated the arterial damage factor of hypertension through immune/inflammatory response. However, folate demonstrated anti-inflammatory properties and reversed the NF-κB p65/Rela/IL-6 level induced by HHcy in hypertensive rats.
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Affiliation(s)
- Lihua Zhang
- Cheeloo College of Medicine, Shandong Qianfoshan Hospital, Shandong University, Jinan, China.,Department of Medicine, Jinan Maternity and Child Care Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Zhongliang Li
- Department of Women Healthcare, Jinan Maternity and Child Care Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Changcheng Xing
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Ning Gao
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Rui Xu
- Cheeloo College of Medicine, Shandong Qianfoshan Hospital, Shandong University, Jinan, China.,Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
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Vermot A, Petit-Härtlein I, Smith SME, Fieschi F. NADPH Oxidases (NOX): An Overview from Discovery, Molecular Mechanisms to Physiology and Pathology. Antioxidants (Basel) 2021; 10:890. [PMID: 34205998 PMCID: PMC8228183 DOI: 10.3390/antiox10060890] [Citation(s) in RCA: 227] [Impact Index Per Article: 75.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/21/2021] [Accepted: 05/26/2021] [Indexed: 01/17/2023] Open
Abstract
The reactive oxygen species (ROS)-producing enzyme NADPH oxidase (NOX) was first identified in the membrane of phagocytic cells. For many years, its only known role was in immune defense, where its ROS production leads to the destruction of pathogens by the immune cells. NOX from phagocytes catalyzes, via one-electron trans-membrane transfer to molecular oxygen, the production of the superoxide anion. Over the years, six human homologs of the catalytic subunit of the phagocyte NADPH oxidase were found: NOX1, NOX3, NOX4, NOX5, DUOX1, and DUOX2. Together with the NOX2/gp91phox component present in the phagocyte NADPH oxidase assembly itself, the homologs are now referred to as the NOX family of NADPH oxidases. NOX are complex multidomain proteins with varying requirements for assembly with combinations of other proteins for activity. The recent structural insights acquired on both prokaryotic and eukaryotic NOX open new perspectives for the understanding of the molecular mechanisms inherent to NOX regulation and ROS production (superoxide or hydrogen peroxide). This new structural information will certainly inform new investigations of human disease. As specialized ROS producers, NOX enzymes participate in numerous crucial physiological processes, including host defense, the post-translational processing of proteins, cellular signaling, regulation of gene expression, and cell differentiation. These diversities of physiological context will be discussed in this review. We also discuss NOX misregulation, which can contribute to a wide range of severe pathologies, such as atherosclerosis, hypertension, diabetic nephropathy, lung fibrosis, cancer, or neurodegenerative diseases, giving this family of membrane proteins a strong therapeutic interest.
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Affiliation(s)
- Annelise Vermot
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France; (A.V.); (I.P.-H.)
| | - Isabelle Petit-Härtlein
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France; (A.V.); (I.P.-H.)
| | - Susan M. E. Smith
- Department of Molecular and Cellular Biology, Kennesaw State University, Kennesaw, GA 30144, USA;
| | - Franck Fieschi
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France; (A.V.); (I.P.-H.)
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Low doses of folic acid can reduce hyperhomocysteinemia-induced glomerular injury in spontaneously hypertensive rats. Hypertens Res 2020; 43:1182-1191. [DOI: 10.1038/s41440-020-0471-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 04/10/2020] [Accepted: 04/22/2020] [Indexed: 12/11/2022]
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Transmembrane Nox4 topology revealed by topological determination by Ubiquitin Fusion Assay, a novel method to uncover membrane protein topology. Biochem Biophys Res Commun 2019; 521:383-388. [PMID: 31668924 DOI: 10.1016/j.bbrc.2019.10.098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 10/11/2019] [Indexed: 10/25/2022]
Abstract
The NADPH oxidase Nox4 is a multi-pass membrane protein responsible for the generation of reactive oxygen species that are implicated in cellular signaling but may also cause pathological situations when dysregulated. Although topological organization of integral membrane protein dictates its function, only limited experimental data describing Nox4's topology are available. To provide deeper insight on Nox4 structural organization, we developed a novel method to determinate membrane protein topology in their cellular environment, named Topological Determination by Ubiquitin Fusion Assay (ToDUFA). It is based on the proteolytic capacity of the deubiquitinase enzymes to process ubiquitin fusion proteins. This straightforward method, validated on two well-known protein's topologies (IL1RI and Nox2), allowed us to discriminate rapidly the topological orientation of protein's domains facing either the nucleocytosolic or the exterior/luminal compartments. Using this method, we were able for the first time to determine experimentally the topology of Nox4 which consists of 6 transmembrane domains with its N- and C-terminus moieties facing the cytosol. While the first, third and fifth loops of Nox4 protein are extracellular; the second and fourth loops are located in the cytosolic side. This approach can be easily extended to characterize the topology of all others members of the NADPH oxidase family or any multi-pass membrane proteins. Considering the importance of protein topology knowledge in cell biology research and pharmacological development, we believe that this novel method will represent a widely useful technique to easily uncover complex membrane protein's topology.
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5d, a novel analogue of 3-n-butylphthalide, decreases NADPH oxidase activity through the positive regulation of CK2 after ischemia/reperfusion injury. Oncotarget 2018; 7:39444-39457. [PMID: 27276705 PMCID: PMC5129944 DOI: 10.18632/oncotarget.8548] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 05/05/2016] [Indexed: 12/19/2022] Open
Abstract
5d, a novel analogue of the racemic 3-n-butylphthalide (NBP), has been reported for its free radical scavenging activity in vitro and preventive neuroprotection in vivo. Nevertheless, the mechanism by which 5d attenuated ischemia/reperfusion (I/R) injury is still unknown. Our results showed that 5d significantly increased CK2 activity as well as CK2α and 2α' protein levels after I/R injury. Besides, 5d suppressed the translocation of cytosolic p47phox and Rac1 to the membrane, decreased NOX4 expression and ROS generation. Furthermore, 5d blocked the dissociation between CK2α and Rac1 so as to decrease NADPH oxidase activity. Based on these findings, we propose that the neuroprotective effect of 5d is due to an increase of CK2 activity, which blocks I/R-induced dissociation between CK2α and Rac1, decreases NADPH oxidase activity, inhibits ROS production and finally realizes the neuroprotection of I/R. These findings point to that 5d might be considered an attractive candidate for further studies in ischemic stroke.
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Hepatoprotective effects of curcumin in rats after bile duct ligation via downregulation of Rac1 and NOX1. Nutrition 2017; 36:72-78. [DOI: 10.1016/j.nut.2016.06.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/24/2016] [Accepted: 06/05/2016] [Indexed: 02/08/2023]
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Dupont M, Ouachée A, Royer J, Dupuy C. [NADPH oxidase: double agent during inflammation?]. Med Sci (Paris) 2016; 32:833-835. [PMID: 27758745 DOI: 10.1051/medsci/20163210014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Magali Dupont
- M1 Biologie Santé, Université Paris-Saclay, 91405 Orsay, France
| | - Alice Ouachée
- M1 Biologie Santé, Université Paris-Saclay, 91405 Orsay, France
| | - Juliette Royer
- M1 Biologie Santé, Université Paris-Saclay, 91405 Orsay, France
| | - Corinne Dupuy
- UMR8200 CNRS, pavillon de recherche 2, Institut Gustave Roussy, 114, rue Édouard Vaillant, 94805 Villejuif, France
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ROS, Cell Senescence, and Novel Molecular Mechanisms in Aging and Age-Related Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:3565127. [PMID: 27247702 PMCID: PMC4877482 DOI: 10.1155/2016/3565127] [Citation(s) in RCA: 610] [Impact Index Per Article: 76.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 04/02/2016] [Accepted: 04/06/2016] [Indexed: 12/15/2022]
Abstract
The aging process worsens the human body functions at multiple levels, thus causing its gradual decrease to resist stress, damage, and disease. Besides changes in gene expression and metabolic control, the aging rate has been associated with the production of high levels of Reactive Oxygen Species (ROS) and/or Reactive Nitrosative Species (RNS). Specific increases of ROS level have been demonstrated as potentially critical for induction and maintenance of cell senescence process. Causal connection between ROS, aging, age-related pathologies, and cell senescence is studied intensely. Senescent cells have been proposed as a target for interventions to delay the aging and its related diseases or to improve the diseases treatment. Therapeutic interventions towards senescent cells might allow restoring the health and curing the diseases that share basal processes, rather than curing each disease in separate and symptomatic way. Here, we review observations on ROS ability of inducing cell senescence through novel mechanisms that underpin aging processes. Particular emphasis is addressed to the novel mechanisms of ROS involvement in epigenetic regulation of cell senescence and aging, with the aim to individuate specific pathways, which might promote healthy lifespan and improve aging.
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