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Kwon J, Wang A, Burke DJ, Boudreau HE, Lekstrom KJ, Korzeniowska A, Sugamata R, Kim YS, Yi L, Ersoy I, Jaeger S, Palaniappan K, Ambruso DR, Jackson SH, Leto TL. Peroxiredoxin 6 (Prdx6) supports NADPH oxidase1 (Nox1)-based superoxide generation and cell migration. Free Radic Biol Med 2016; 96:99-115. [PMID: 27094494 PMCID: PMC4929831 DOI: 10.1016/j.freeradbiomed.2016.04.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 04/11/2016] [Accepted: 04/12/2016] [Indexed: 02/05/2023]
Abstract
Nox1 is an abundant source of reactive oxygen species (ROS) in colon epithelium recently shown to function in wound healing and epithelial homeostasis. We identified Peroxiredoxin 6 (Prdx6) as a novel binding partner of Nox activator 1 (Noxa1) in yeast two-hybrid screening experiments using the Noxa1 SH3 domain as bait. Prdx6 is a unique member of the Prdx antioxidant enzyme family exhibiting both glutathione peroxidase and phospholipase A2 activities. We confirmed this interaction in cells overexpressing both proteins, showing Prdx6 binds to and stabilizes wild type Noxa1, but not the SH3 domain mutant form, Noxa1 W436R. We demonstrated in several cell models that Prdx6 knockdown suppresses Nox1 activity, whereas enhanced Prdx6 expression supports higher Nox1-derived superoxide production. Both peroxidase- and lipase-deficient mutant forms of Prdx6 (Prdx6 C47S and S32A, respectively) failed to bind to or stabilize Nox1 components or support Nox1-mediated superoxide generation. Furthermore, the transition-state substrate analogue inhibitor of Prdx6 phospholipase A2 activity (MJ-33) was shown to suppress Nox1 activity, suggesting Nox1 activity is regulated by the phospholipase activity of Prdx6. Finally, wild type Prdx6, but not lipase or peroxidase mutant forms, supports Nox1-mediated cell migration in the HCT-116 colon epithelial cell model of wound closure. These findings highlight a novel pathway in which this antioxidant enzyme positively regulates an oxidant-generating system to support cell migration and wound healing.
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Affiliation(s)
- Jaeyul Kwon
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
- Department of Medical Education, School of Medicine, Chungnam National University, Daejeon, 301-747, Korea
| | - Aibing Wang
- Diabetes Cluster, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, USA
| | - Devin J. Burke
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Howard E. Boudreau
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Kristen J. Lekstrom
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Agnieszka Korzeniowska
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Ryuichi Sugamata
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Yong-Soo Kim
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Liang Yi
- Diabetes Cluster, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, USA
| | - Ilker Ersoy
- Department of Pathology and Anatomical Sciences, University of Missouri, Sch. of Medicine, Columbia, MO, USA
| | - Stefan Jaeger
- Lister Hill National Center for Biomedical Communications, National Library of Medicine, National Institutes of Health, Bethesda, MD, USA
| | | | - Daniel R. Ambruso
- Department of Pediatrics, University of Colorado Sch. of Medicine, Denver, CO, USA
| | - Sharon H. Jackson
- Diabetes Cluster, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, USA
| | - Thomas L. Leto
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
- Corresponding author: Laboratory of Host Defenses, NIAID, NIH, 12441 Parklawn Drive, Rockville, MD, 20852, USA. Fax: 301 480-1731.
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