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Zhang J, Gong T, Chen P, Zhu J, Huang S, Li Y, Li G, Zhang Q, Duan M, Song Q, Yang J, Hou S. Connexin30-deficient mice increase susceptibility to noise via redox and lactate imbalances. Free Radic Biol Med 2024:S0891-5849(24)00982-1. [PMID: 39396580 DOI: 10.1016/j.freeradbiomed.2024.10.280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 09/03/2024] [Accepted: 10/10/2024] [Indexed: 10/15/2024]
Abstract
Noise significantly contributes to one-third of the global burden of hearing loss. The intricate interplay of genetic and environmental factors impacts various molecular and cellular processes that lead to noise-induced hearing loss (NIHL). Defective connexin 26 (Cx26) and connexin 30 (Cx30), encoded by Gjb2/Cx26 and Gjb6/Cx30, respectively, are prevalent causes of hereditary deafness. However, the role of Cx30 in the pathogenesis of NIHL remains unclear. Herein, we observed that homozygous Cx30 knockout (Cx30 KO) mice exhibited poorer hearing recovery after noise exposure (97 dB mean sound pressure level for 2 h) and increased susceptibility to noise. In addition to the exacerbation of noise-induced damage to hair cells and synapses, Cx30 KO mice exposed to noise exhibited increased oxidative stress. The 2-(N-(7-nitrobenz-2-oxa-1,3-dia-zol-4-yl) amino)-2-deoxyglucose assay showed a reduction in glucose levels associated with a decrease in gap junctions as well as a reduction in adenosine triphosphate release. Glucose metabolomics analysis further revealed that Cx30 KO mice had elevated lactate and NAD+ levels after noise exposure, thus worsening anaerobic oxidation from glycolysis. Our study emphasizes that Cx30-deficient mice increase susceptibility to noise via redox and lactate imbalances in the cochlea.
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Affiliation(s)
- Jifang Zhang
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China
| | - Tianyu Gong
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China
| | - Penghui Chen
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China
| | - Jingyi Zhu
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China
| | - Sihan Huang
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China
| | - Yue Li
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China
| | - Guiping Li
- Shanghai Jiaotong University School of Medicine
| | - Qing Zhang
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China
| | - Maoli Duan
- Ear Nose and Throat Patient Area, Trauma and Reparative Medicine Theme, Karolinska University Hospital, Stockholm, Sweden; Division of Ear, Nose and Throat Diseases, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Qiang Song
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China.
| | - Jun Yang
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China.
| | - Shule Hou
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine; Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai, China.
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Hebchen DM, Spaeth M, Müller N, Schröder K. NoxO1 Determines the Level of ROS Formation by the Nox1-Centered NADPH Oxidase. Antioxidants (Basel) 2024; 13:1113. [PMID: 39334772 PMCID: PMC11428687 DOI: 10.3390/antiox13091113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Revised: 09/06/2024] [Accepted: 09/12/2024] [Indexed: 09/30/2024] Open
Abstract
The Nox1-centered NADPH oxidase complex facilitates the transfer of electrons from intracellular NADPH across the cell membrane to extracellular molecular oxygen, resulting in the formation of superoxide. The complex is comprised of two membrane-bound subunits, namely Nox1 and p22phox, and the cytosolic subunits, namely NoxA1 and NoxO1. The presence of NoxO1 facilitates the proximity of all components, thereby enabling the complex to exhibit constitutive activity. Despite the theoretical sufficiency of all subunits in a 1:1 ratio, the precise composition of the Nox1-centered NADPH oxidase remains unknown. Analyses of mRNA expression in different cell lines revealed an unequal expression of the components, with an excess of NoxO1. Furthermore, plasmid-based overexpression of individual components of the Nox1-centered NADPH oxidase resulted in an excess of NoxO1 mRNA. The objective of this study was to analyze the ability of NoxO1 to control the level of ROS formation by the Nox1 complex. To this end, we generated Hek293 cells for constitutive expression of Nox1 and NoxA1, which were then transfected with increasing concentrations of NoxO1. The data presented herein suggests that ROS formation by the Nox1-centered NADPH oxidase is dependent on the concentration of NoxO1. A surplus of NoxO1 has been observed to exert control over the activity of the complex in accordance with a dose-dependent mechanism. We thus conclude that the ratio of Nox1, NoxA1, and NoxO1 complexes does not adhere to a 1:1 ratio. Conversely, the availability of NoxO1 serves to regulate the formation of ROS by the Nox1-centered NADPH oxidase.
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Affiliation(s)
- Dana Maureen Hebchen
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, 60298 Frankfurt, Germany
| | - Manuela Spaeth
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, 60298 Frankfurt, Germany
| | - Niklas Müller
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, 60298 Frankfurt, Germany
| | - Katrin Schröder
- Institute for Cardiovascular Physiology, Goethe University Frankfurt, 60298 Frankfurt, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site RheinMain, 60596 Frankfurt, Germany
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Pham TD, Verlander JW, Chen C, Pech V, Kim HI, Kim YH, Weiner ID, Milne GL, Zent R, Bock F, Brown D, Eaton A, Wall SM. Angiotensin II acts through Rac1 to upregulate pendrin: role of NADPH oxidase. Am J Physiol Renal Physiol 2024; 326:F202-F218. [PMID: 38059296 PMCID: PMC11198991 DOI: 10.1152/ajprenal.00139.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 11/14/2023] [Accepted: 11/14/2023] [Indexed: 12/08/2023] Open
Abstract
Angiotensin II increases apical plasma membrane pendrin abundance and function. This study explored the role of the small GTPase Rac1 in the regulation of pendrin by angiotensin II. To do this, we generated intercalated cell (IC) Rac1 knockout mice and observed that IC Rac1 gene ablation reduced the relative abundance of pendrin in the apical region of intercalated cells in angiotensin II-treated mice but not vehicle-treated mice. Similarly, the Rac1 inhibitor EHT 1864 reduced apical pendrin abundance in angiotensin II-treated mice, through a mechanism that does not require aldosterone. This IC angiotensin II-Rac1 signaling cascade modulates pendrin subcellular distribution without significantly changing actin organization. However, NADPH oxidase inhibition with APX 115 reduced apical pendrin abundance in vivo in angiotensin II-treated mice. Moreover, superoxide dismutase mimetics reduced Cl- absorption in angiotensin II-treated cortical collecting ducts perfused in vitro. Since Rac1 is an NADPH subunit, Rac1 may modulate pendrin through NADPH oxidase-mediated reactive oxygen species production. Because pendrin gene ablation blunts the pressor response to angiotensin II, we asked if pendrin blunts the angiotensin II-induced increase in kidney superoxide. Although kidney superoxide was similar in vehicle-treated wild-type and pendrin knockout mice, it was lower in angiotensin II-treated pendrin-null kidneys than in wild-type kidneys. We conclude that angiotensin II acts through Rac1, independently of aldosterone, to increase apical pendrin abundance. Rac1 may stimulate pendrin, at least partly, through NADPH oxidase. This increase in pendrin abundance contributes to the increment in blood pressure and kidney superoxide content seen in angiotensin II-treated mice.NEW & NOTEWORTHY This study defines a new signaling mechanism by which angiotensin II modulates oxidative stress and blood pressure.
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Affiliation(s)
- Truyen D Pham
- Renal Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Jill W Verlander
- Division of Nephrology, Hypertension and Renal Transplantation, The University of Florida College of Medicine, Gainesville, Florida, United States
| | - Chao Chen
- Division of Nephrology, Hypertension and Renal Transplantation, The University of Florida College of Medicine, Gainesville, Florida, United States
| | - Vladimir Pech
- Renal Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Hailey I Kim
- Renal Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Young Hee Kim
- Renal Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States
| | - I David Weiner
- Division of Nephrology, Hypertension and Renal Transplantation, The University of Florida College of Medicine, Gainesville, Florida, United States
- Nephrology and Hypertension Section, Gainesville Veterans Affairs Medical Center, Gainesville, Florida, United States
| | - Ginger L Milne
- Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Roy Zent
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Department of Veterans Affairs Hospital, Nashville, Tennessee, United States
| | - Fabian Bock
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
- Department of Veterans Affairs Hospital, Nashville, Tennessee, United States
| | - Dennis Brown
- Program in Membrane Biology, Division of Nephrology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States
| | - Amity Eaton
- Program in Membrane Biology, Division of Nephrology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States
| | - Susan M Wall
- Renal Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States
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Dong S, Chen C, Di C, Wang S, Dong Q, Lin W, Liu D. The Association between NADPH Oxidase 2 (NOX2) and Drug Resistance in Cancer. Curr Cancer Drug Targets 2024; 24:1195-1212. [PMID: 38362697 DOI: 10.2174/0115680096277328240110062433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 12/15/2023] [Accepted: 12/26/2023] [Indexed: 02/17/2024]
Abstract
NADPH oxidase, as a major source of intracellular reactive oxygen species (ROS), assumes an important role in the immune response and oxidative stress response of the body. NADPH oxidase 2 (NOX2) is the first and most representative member of the NADPH oxidase family, and its effects on the development of tumor cells are gaining more and more attention. Our previous study suggested that NCF4 polymorphism in p40phox, a key subunit of NOX2, affected the outcome of diffuse large B-cell lymphoma patients treated with rituximab. It hypothesized that NOX2-mediated ROS could enhance the cytotoxic effects of some anti-tumor drugs in favor of patients with tumors. Several reviews have summarized the role of NOX2 and its congeners-mediated ROS in anti-tumor therapy, but few studies focused on the relationship between the expression of NOX2 and anti-tumor drug resistance. In this article, we systematically introduced the NOX family, represented by NOX2, and a classification of the latest inhibitors and agonists of NOX2. It will help researchers to have a more rational and objective understanding of the dual role of NOX2 in tumor drug resistance and is expected to provide new ideas for oncology treatment and overcoming drug resistance in cancer.
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Affiliation(s)
- Shiqi Dong
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, 150086, China
| | - Chao Chen
- Department of laboratory, Harbin Medical University Cancer Hospital, Harbin, 150086, China
| | - Chang Di
- Department of Radiation Oncology, Harbin Medical University Cancer Hospital, Harbin, 150086, China
| | - Shufan Wang
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, 150086, China
| | - Quan Dong
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, 150086, China
| | - Wenxin Lin
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, 150086, China
| | - Duo Liu
- Department of Pharmacy, Harbin Medical University Cancer Hospital, Harbin, 150086, China
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Neuroprotective Effects of Pharmacological Hypothermia on Hyperglycolysis and Gluconeogenesis in Rats after Ischemic Stroke. Biomolecules 2022; 12:biom12060851. [PMID: 35740974 PMCID: PMC9220898 DOI: 10.3390/biom12060851] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 06/13/2022] [Accepted: 06/15/2022] [Indexed: 12/26/2022] Open
Abstract
Stroke is a leading threat to human life. Metabolic dysfunction of glucose may play a key role in stroke pathophysiology. Pharmacological hypothermia (PH) is a potential neuroprotective strategy for stroke, in which the temperature is decreased safely. The present study determined whether neuroprotective PH with chlorpromazine and promethazine (C + P), plus dihydrocapsaicin (DHC) improved glucose metabolism in acute ischemic stroke. A total of 208 adult male Sprague Dawley rats were randomly divided into the following groups: sham, stroke, and stroke with various treatments including C + P, DHC, C + P + DHC, phloretin (glucose transporter (GLUT)-1 inhibitor), cytochalasin B (GLUT-3 inhibitor), TZD (thiazolidinedione, phosphoenolpyruvate carboxykinase (PCK) inhibitor), and apocynin (nicotinamide adenine dinucleotide phosphate oxidase (NOX) inhibitor). Stroke was induced by middle cerebral artery occlusion (MCAO) for 2 h followed by 6 or 24 h of reperfusion. Rectal temperature was monitored before, during, and after PH. Infarct volume and neurological deficits were measured to assess the neuroprotective effects. Reactive oxygen species (ROS), NOX activity, lactate, apoptotic cell death, glucose, and ATP levels were measured. Protein expression of GLUT-1, GLUT-3, phosphofructokinase (PFK), lactate dehydrogenase (LDH), PCK1, PCK2, and NOX subunit gp91 was measured with Western blotting. PH with a combination of C + P and DHC induced faster, longer, and deeper hypothermia, as compared to each alone. PH significantly improved every measured outcome as compared to stroke and monotherapy. PH reduced brain infarction, neurological deficits, protein levels of glycolytic enzymes (GLUT-1, GLUT-3, PFK and LDH), gluconeogenic enzymes (PCK1 and PCK2), NOX activity and its subunit gp91, ROS, apoptotic cell death, glucose, and lactate, while raising ATP levels. In conclusion, stroke impaired glucose metabolism by enhancing hyperglycolysis and gluconeogenesis, which led to ischemic injury, all of which were reversed by PH induced by a combination of C + P and DHC.
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Mao H, Chen Y. Noise-Induced Hearing Loss: Updates on Molecular Targets and Potential Interventions. Neural Plast 2021; 2021:4784385. [PMID: 34306060 PMCID: PMC8279877 DOI: 10.1155/2021/4784385] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/12/2021] [Indexed: 12/18/2022] Open
Abstract
Noise overexposure leads to hair cell loss, synaptic ribbon reduction, and auditory nerve deterioration, resulting in transient or permanent hearing loss depending on the exposure severity. Oxidative stress, inflammation, calcium overload, glutamate excitotoxicity, and energy metabolism disturbance are the main contributors to noise-induced hearing loss (NIHL) up to now. Gene variations are also identified as NIHL related. Glucocorticoid is the only approved medication for NIHL treatment. New pharmaceuticals targeting oxidative stress, inflammation, or noise-induced neuropathy are emerging, highlighted by the nanoparticle-based drug delivery system. Given the complexity of the pathogenesis behind NIHL, deeper and more comprehensive studies still need to be fulfilled.
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Affiliation(s)
- Huanyu Mao
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - Yan Chen
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
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7
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Bechor E, Zahavi A, Berdichevsky Y, Pick E. The molecular basis of Rac-GTP action-promoting binding of p67 phox to Nox2 by disengaging the β hairpin from downstream residues. J Leukoc Biol 2021; 110:219-237. [PMID: 33857329 DOI: 10.1002/jlb.4hi1220-855rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/14/2021] [Accepted: 03/16/2021] [Indexed: 11/11/2022] Open
Abstract
p67phox fulfils a key role in the assembly/activation of the NADPH oxidase by direct interaction with Nox2. We proposed that Rac-GTP serves both as a carrier of p67phox to the membrane and an inducer of a conformational change enhancing its affinity for Nox2. This study provides evidence for the latter function: (i) oxidase activation was inhibited by p67phox peptides (106-120) and (181-195), corresponding to the β hairpin and to a downstream region engaged in intramolecular bonds with the β hairpin, respectively; (ii) deletion of residues 181-193 and point mutations Q115R or K181E resulted in selective binding of p67phox to Nox2 peptide (369-383); (iii) both deletion and point mutations led to a change in p67phox , expressed in increased apparent molecular weights; (iv) p67phox was bound to p67phox peptide (181-195) and to a cluster of peptides (residues 97-117), supporting the participation of selected residues within these sequences in intramolecular bonds; (v) p67phox failed to bind to Nox2 peptide (369-383), following interaction with Rac1-GTP, but a (p67phox -Rac1-GTP) chimera exhibited marked binding to the peptide, similar to that of p67phox deletion and point mutants; and (vi) size exclusion chromatography of the chimera revealed its partition in monomeric and polymeric forms, with binding to Nox2 peptide (369-383) restricted to polymers. The molecular basis of Rac-GTP action entails unmasking of a previously hidden Nox2-binding site in p67phox , following disengagement of the β hairpin from more C-terminal residues. The domain in Nox2 binding the "modified" p67phox comprises residues within the 369-383 sequence in the cytosolic dehydrogenase region.
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Affiliation(s)
- Edna Bechor
- The Julius Friedrich Cohnheim Laboratory of Phagocyte Research, Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Anat Zahavi
- The Julius Friedrich Cohnheim Laboratory of Phagocyte Research, Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yevgeny Berdichevsky
- The Julius Friedrich Cohnheim Laboratory of Phagocyte Research, Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Edgar Pick
- The Julius Friedrich Cohnheim Laboratory of Phagocyte Research, Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Ma Q, Gao X, Tu L, Han Q, Zhang X, Guo Y, Yan W, Shen Y, Wang M. Enhanced Chitin Deacetylase Production Ability of Rhodococcus equi CGMCC14861 by Co-culture Fermentation With Staphylococcus sp. MC7. Front Microbiol 2020; 11:592477. [PMID: 33362742 PMCID: PMC7758288 DOI: 10.3389/fmicb.2020.592477] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 11/19/2020] [Indexed: 11/13/2022] Open
Abstract
Chitin deacetylase (CDA) can hydrolyze the acetamido group of chitin polymers and its deacetylated derivatives to produce chitosan, an industrially important biopolymer. Compared with traditional chemical methods, biocatalysis by CDA is more environment-friendly and easy to control. However, most reported CDA-producing microbial strains show low CDA producing capabilities. Thus, the enhancement of CDA production has always been a challenge. In this study, we report co-culture fermentation to significantly promote the CDA production of Rhodococcus equi CGMCC14861 chitin deacetylase (ReCDA). Due to co-culture fermentation with Staphylococcus sp. MC7, ReCDA yield increased to 21.74 times that of pure culture of R. equi. Additionally, the enhancement was demonstrated to be cell-independent by adding cell-free extracts and the filtrate obtained by 10 kDa ultrafiltration of Staphylococcus sp. MC7. By preliminary characterization, we found extracellular, thermosensitive signal substances produced by Staphylococcus that were less than 10 kDa. We investigated the mechanism of promotion of ReCDA production by transcriptomic analysis. The data showed that 328 genes were upregulated and 1,258 genes were downregulated. The transcription level of the gene encoding ReCDA increased 2.3-fold. These findings provide new insights into the research of co-culture fermentation for the production of CDA and quorum sensing regulation.
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Affiliation(s)
- Qinyuan Ma
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
- School of Life Sciences, Shandong University of Technology, Zibo, China
| | - Xiuzhen Gao
- School of Life Sciences, Shandong University of Technology, Zibo, China
| | - Linna Tu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Qi Han
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, VIC, Australia
| | - Xing Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Yabo Guo
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Wenqin Yan
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Yanbing Shen
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Min Wang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
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Fang H, Wu XM, Hu YW, Song YJ, Zhang J, Chang MX. NLRC3-like 1 inhibits NOD1-RIPK2 pathway via targeting RIPK2. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 112:103769. [PMID: 32634524 DOI: 10.1016/j.dci.2020.103769] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 05/19/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
Both NLRC3 and NOD1 belong to regulatory NLR subfamily based on their best-characterized function. In mammals, NLRC3 was reported to function by attenuating signaling cascades initiated by other families of PRRs. In teleosts, multiple NLRC3-like genes were identified through transcriptome sequencing. However, the functions of many NLRC3-like genes, especially the fish-specific NLRC3-like genes, remain unclear. In the present study, we report the functional characterization of a novel category of NLRC3-like proteins (named as NLRC3-like 1) from the zebrafish, which consists of a fish-specific FISNA, a conserved NACHT and five C-terminal LRRs domains. The expression of zebrafish NLRC3-like 1 was inducible in response to Edwardsiella piscicida infection. During bacterial infection, the in vitro and in vivo studies revealed that zebrafish NLRC3-like 1 overexpression facilitated bacterial growth and dissemination, together with the decreased survival rate of zebrafish larvae infected with E. piscicida. The attenuated response by zebrafish NLRC3-like 1 in response to bacterial infection were characterized by the impaired expression of antibacterial genes, proinflammatory cytokines and Nox genes. Furthermore, zebrafish NLRC3-like 1 interacted with the adaptor protein RIPK2 of NODs signaling via the FISNA (Fish-specific NACHT associated domain) and NACHT domains. However, the interaction between zebrafish NLRC3-like 1 and RIPK2 inhibited the assembly of the NOD1-RIPK2 complex. Importantly, zebrafish NLRC3-like 1 inhibited NOD1-mediated antibacterial activity, NF-κB and MAPK pathways and proinflammatory cytokine production. All together, these results firstly demonstrate that zebrafish NLRC3-like 1 inhibits NOD1-RIPK2 antibacterial pathway via targeting the adaptor protein RIPK2.
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Affiliation(s)
- Hong Fang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Aquaculture Disease Control, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xiao Man Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Aquaculture Disease Control, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yi Wei Hu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Aquaculture Disease Control, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yun Jie Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Aquaculture Disease Control, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; University of Chinese Academy of Sciences, Beijing, China
| | - Jie Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Aquaculture Disease Control, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China
| | - Ming Xian Chang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Aquaculture Disease Control, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China; Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China.
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10
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Miyano K, Okamoto S, Yamauchi A, Kajikawa M, Kiyohara T, Taura M, Kawai C, Kuribayashi F. Constitutive activity of NADPH oxidase 1 (Nox1) that promotes its own activity suppresses the colon epithelial cell migration. Free Radic Res 2020; 54:640-648. [PMID: 32924676 DOI: 10.1080/10715762.2020.1823383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Superoxide producing NADPH oxidase 1 (Nox1), abundantly expressed in the colon epithelium, plays a crucial role in mucosal host defenses. In this study, we found that pre-treatment of cells with edaravone, a free radical scavenger, inhibited Nox1 constitutive activity even after washout without affecting Nox1 trafficking to the plasma membrane and membrane recruitment of the cytosolic regulators Noxo1 and Noxa1. These results suggest that a Nox1-derived product is involved in the step that initiates the electron transfer reaction after the formation of the Nox1-Noxo1-Noxa1 complex. Furthermore, we show that the mean migration directionality and velocity of epithelial cells were significantly enhanced by the inhibition of constitutive Nox1 activity. Thus, the constitutive Nox1 activity limits undesired cell migration in resting cells while participating in a positive feedback loop toward its own oxidase activity.
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Affiliation(s)
- Kei Miyano
- Department of Biochemistry, Kawasaki Medical School, Okayama, Japan
| | | | - Akira Yamauchi
- Department of Biochemistry, Kawasaki Medical School, Okayama, Japan
| | - Mizuho Kajikawa
- Laboratory of Microbiology, Showa Pharmaceutical University, Machida, Japan
| | - Takuya Kiyohara
- Department of Cerebrovascular Disease and Neurology, Hakujyuji Hospital, Fukuoka, Japan
| | - Masahiko Taura
- Department of Otorhinolaryngology, Faculty of medicine, Fukuoka University, Fukuoka, Japan
| | - Chikage Kawai
- Department of Biochemistry, Kawasaki Medical School, Okayama, Japan
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Miyano K, Okamoto S, Yamauchi A, Kawai C, Kajikawa M, Kiyohara T, Tamura M, Taura M, Kuribayashi F. The NADPH oxidase NOX4 promotes the directed migration of endothelial cells by stabilizing vascular endothelial growth factor receptor 2 protein. J Biol Chem 2020; 295:11877-11890. [PMID: 32616654 DOI: 10.1074/jbc.ra120.014723] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 06/26/2020] [Indexed: 11/06/2022] Open
Abstract
Directed migration of endothelial cells (ECs) is an important process during both physiological and pathological angiogenesis. The binding of vascular endothelial growth factor (VEGF) to VEGF receptor-2 (VEGFR-2) on the EC surface is necessary for directed migration of these cells. Here, we used TAXIScan, an optically accessible real-time horizontal cell dynamics assay approach, and demonstrate that reactive oxygen species (ROS)-producing NADPH oxidase 4 (NOX4), which is abundantly expressed in ECs, mediates VEGF/VEGFR-2-dependent directed migration. We noted that a continuous supply of endoplasmic reticulum (ER)-retained VEGFR-2 to the plasma membrane is required to maintain VEGFR-2 at the cell surface. siRNA-mediated NOX4 silencing decreased the ER-retained form of VEGFR-2, resulting in decreased cell surface expression levels of the receptor. We also found that ER-localized NOX4 interacts with ER-retained VEGFR-2 and thereby stabilizes this ER-retained form at the protein level in the ER. We conclude that NOX4 contributes to the directed migration of ECs by maintaining VEGFR-2 levels at their surface.
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Affiliation(s)
- Kei Miyano
- Department of Biochemistry, Kawasaki Medical School, Okayama, Japan
| | | | - Akira Yamauchi
- Department of Biochemistry, Kawasaki Medical School, Okayama, Japan
| | - Chikage Kawai
- Department of Biochemistry, Kawasaki Medical School, Okayama, Japan
| | - Mizuho Kajikawa
- Laboratory of Microbiology, Showa Pharmaceutical University, Tokyo, Japan
| | - Takuya Kiyohara
- Department of Cerebrovascular Disease and Neurology, Hakujyuji Hospital, Fukuoka, Japan
| | - Minoru Tamura
- Department of Applied Chemistry, Graduate School of Science and Engineering, Ehime University, Ehime, Japan
| | - Masahiko Taura
- Department of Otorhinolaryngology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
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The NADPH Oxidase and the Phagosome. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1246:153-177. [DOI: 10.1007/978-3-030-40406-2_9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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