1
|
Staples S, Wall SB, Li R, Tipple TE. Selenium-independent antioxidant and anti-inflammatory effects of thioredoxin reductase inhibition in alveolar macrophages. Life Sci 2020; 259:118285. [PMID: 32798556 DOI: 10.1016/j.lfs.2020.118285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 08/08/2020] [Accepted: 08/11/2020] [Indexed: 01/10/2023]
Abstract
AIMS Interleukin-1β (IL-1β) contributes to the development of bronchopulmonary dysplasia (BPD). Thioredoxin reductase-1 (Txnrd1) inhibition activates nuclear factor erythroid 2-related factor 2 (Nrf2)-dependent responses. Txnrd1 activity is selenium (Se) dependent and Se deficiency is common in prematurity. Auranofin (AFN), a Txnrd1 inhibitor, decreases IL-1β levels and increases Nrf2 activation in lipopolysaccharide (LPS) treated alveolar macrophages. In lung epithelia, AFN-induced Nrf2 activation is Se dependent. We tested the hypothesis that the effects of Txnrd1 inhibition in alveolar macrophages are Se dependent. MAIN METHODS To establish Se sufficient (Se+) and deficient (Se-) conditions, alveolar (MH-S) macrophages were cultured in 2.5% fetal bovine serum (FBS) ± 25 nM Na2SeO3. Se- (2.5% FBS) and Se+ (2.5% FBS + 25 nM Na2SeO3) cells were cultured in the presence or absence of 0.05 μg/mL LPS and/or 0.5 μM AFN. Nrf2 activation was determined by measuring NADPH quinone oxidoreductase-1 (Nqo1) and glutathione levels. IL-1β mRNA (Il1b) and protein levels were measured using qRT-PCR and ELISA. Data were analyzed by ANOVA followed by Tukey's post-hoc. KEY FINDINGS We detected an independent effect of AFN, but not LPS, on Nqo1 expression and GSH levels in Se+ and Se- cells. LPS significantly increased Il1b and IL-1β levels in both groups. AFN-mediated attenuation of this effect was not impacted by Se status. SIGNIFICANCE The beneficial effects of Txnrd1 inhibition in alveolar macrophages are Se-independent and therefore unlikely to be diminished by clinical Se deficiency.
Collapse
Affiliation(s)
- Sara Staples
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stephanie B Wall
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rui Li
- Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Trent E Tipple
- Center for Pregnancy and Newborn Research, Section of Neonatal-Perinatal Medicine, Department of Pediatrics, University of Oklahoma College of Medicine, Oklahoma City, OK, USA.
| |
Collapse
|
2
|
Nicola T, Kabir FL, Coric T, Wall SB, Zhang W, James M, MacEwen M, Ren C, Halloran B, Ambalavanan N, Harris WT. CFTR dysfunction increases endoglin and TGF-β signaling in airway epithelia. Physiol Rep 2020; 7:e13977. [PMID: 30806029 PMCID: PMC6389738 DOI: 10.14814/phy2.13977] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/10/2018] [Accepted: 12/15/2018] [Indexed: 11/24/2022] Open
Abstract
Endoglin (ENG) regulates signaling by transforming growth factor‐β (TGF‐β), a genetic modifier of cystic fibrosis (CF) lung disease severity. We hypothesized that ENG mediates TGF‐β pathobiology in CF airway epithelia. Comparing CF and non‐CF human lungs, we measured ENG by qPCR, immunoblotting and ELISA. In human bronchial epithelial cell lines (16HBE), we used CFTR siRNA knockdown and functional inhibition (CFTRINH‐172) to connect loss of CFTR to ENG synthesis. Plasmid overexpression of ENG assessed the direct effect of ENG on TGF‐β transcription and signal amplification in 16HBE cells. We found ENG protein to be increased more than fivefold both in human CF bronchoalveolar fluid (BALF) and human CF lung homogenates. ENG transcripts were increased threefold in CF, with a twofold increase in TGF‐β signaling. CFTR knockdown in 16HBE cells tripled ENG transcription and doubled protein levels with corresponding increases in TGF‐β signaling. Plasmid overexpression of ENG alone nearly doubled TGF‐β1 mRNA and increased TGF‐β signaling in 16HBE cells. These experiments identify that loss of CFTR function increases ENG expression in CF epithelia and amplifies TGF‐β signaling. Targeting ENG may offer a novel therapeutic opportunity to address TGF‐β associated pathobiology in CF.
Collapse
Affiliation(s)
- Teodora Nicola
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Farruk L Kabir
- Division of Pediatric Pulmonology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Tatjana Coric
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Stephanie B Wall
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Weifeng Zhang
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Masheika James
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Mark MacEwen
- Division of Pediatric Pulmonology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Changchun Ren
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Brian Halloran
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Namasivayam Ambalavanan
- Division of Neonatology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - William T Harris
- Division of Pediatric Pulmonology, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama.,Gregory Fleming James Cystic Fibrosis Center, University of Alabama at Birmingham, Birmingham, Alabama
| |
Collapse
|
3
|
Dunigan-Russell K, Lin V, Silverberg M, Wall SB, Li R, Gotham J, Nicola T, Sridharan A, Snowball J, Delaney C, Li Q, Tipple TE. Aurothioglucose enhances proangiogenic pathway activation in lungs from room air and hyperoxia-exposed newborn mice. Am J Physiol Lung Cell Mol Physiol 2020; 318:L1165-L1171. [PMID: 32292070 DOI: 10.1152/ajplung.00086.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD), a long-term respiratory morbidity of prematurity, is characterized by attenuated alveolar and vascular development. Supplemental oxygen and immature antioxidant defenses contribute to BPD development. Our group identified thioredoxin reductase-1 (TXNRD1) as a therapeutic target to prevent BPD. The present studies evaluated the impact of the TXNRD1 inhibitor aurothioglucose (ATG) on pulmonary responses and gene expression in newborn C57BL/6 pups treated with saline or ATG (25 mg/kg ip) within 12 h of birth and exposed to room air (21% O2) or hyperoxia (>95% O2) for 72 h. Purified RNA from lung tissues was sequenced, and differential expression was evaluated. Hyperoxic exposure altered ~2,000 genes, including pathways involved in glutathione metabolism, intrinsic apoptosis signaling, and cell cycle regulation. The isolated effect of ATG treatment was limited primarily to genes that regulate angiogenesis and vascularization. In separate studies, pups were treated as described above and returned to room air until 14 days. Vascular density analyses were performed, and ANOVA indicated an independent effect of hyperoxia on vascular density and alveolar architecture at 14 days. Consistent with RNA-seq analyses, ATG significantly increased vascular density in room air, but not in hyperoxia-exposed pups. These findings provide insights into the mechanisms by which TXNRD1 inhibitors may enhance lung development.
Collapse
Affiliation(s)
- Katelyn Dunigan-Russell
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Vivian Lin
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Mary Silverberg
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Stephanie B Wall
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Rui Li
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - John Gotham
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Teodora Nicola
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Anusha Sridharan
- Division of Neonatology, Perinatal and Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - John Snowball
- Division of Neonatology, Perinatal and Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Cassidy Delaney
- Section of Neonatology, Department of Pediatrics, University of Colorado Anschutz Medical Campus and Children's Hospital Colorado, Aurora, Colorado
| | - Qian Li
- Division of Neonatology, Neonatal Redox Biology Laboratory, Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama.,Division of Neonatology, Perinatal and Pulmonary Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Trent E Tipple
- Section of Neonatal-Perinatal Medicine, Department of Pediatrics, University of Oklahoma, Oklahoma City, Oklahoma
| |
Collapse
|
4
|
Jiang C, Stewart LT, Kuo HC, McGilberry W, Wall SB, Liang B, van Groen T, Bailey SM, Kim YI, Tipple TE, Jones DP, McMahon LL, Liu RM. Cyclic O 3 exposure synergizes with aging leading to memory impairment in male APOE ε3, but not APOE ε4, targeted replacement mice. Neurobiol Aging 2019; 81:9-21. [PMID: 31207469 DOI: 10.1016/j.neurobiolaging.2019.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/25/2019] [Accepted: 05/09/2019] [Indexed: 10/26/2022]
Abstract
The etiology of late-onset Alzheimer's disease is unknown. Recent epidemiological studies suggest that exposure to high levels of ozone (O3) may be a risk factor for late-onset Alzheimer's disease. Nonetheless, whether and how O3 exposure contributes to AD development remains to be determined. In this study, we tested the hypothesis that O3 exposure synergizes with the genetic risk factor APOE ε4 and aging leading to AD, using male apolipoprotein E (apoE)4 and apoE3 targeted replacement mice as men have increased risk exposure to high levels of O3 via working environments and few studies have addressed APOE ε4 effects on males. Surprisingly, our results show that O3 exposure impairs memory in old apoE3, but not old apoE4 or young apoE3 and apoE4, male mice. Further studies show that old apoE4 mice have increased hippocampal activities or expression of some enzymes involved in antioxidant defense, diminished protein oxidative modification, and neuroinflammation following O3 exposure compared with old apoE3 mice. These novel findings highlight the complexity of interactions between APOE genotype, age, and environmental exposure in AD development.
Collapse
Affiliation(s)
- Chunsun Jiang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Luke T Stewart
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Hui-Chien Kuo
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - William McGilberry
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stephanie B Wall
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Bill Liang
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Thomas van Groen
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Young-Il Kim
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Trent E Tipple
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Dean P Jones
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Lori L McMahon
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rui-Ming Liu
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
| |
Collapse
|
5
|
Tindell R, Wall SB, Li Q, Li R, Dunigan K, Wood R, Tipple TE. Selenium supplementation of lung epithelial cells enhances nuclear factor E2-related factor 2 (Nrf2) activation following thioredoxin reductase inhibition. Redox Biol 2018; 19:331-338. [PMID: 30212802 PMCID: PMC6134185 DOI: 10.1016/j.redox.2018.07.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/17/2018] [Accepted: 07/26/2018] [Indexed: 11/24/2022] Open
Abstract
The trace element selenium (Se) contributes to redox signaling, antioxidant defense, and immune responses in critically ill neonatal and adult patients. Se is required for the synthesis and function of selenoenzymes including thioredoxin (Trx) reductase-1 (TXNRD1) and glutathione peroxidases (GPx). We have previously identified TXNRD1, primarily expressed by airway epithelia, as a promising therapeutic target to prevent lung injury, likely via nuclear factor E2-related factor 2 (Nrf2)-dependent mechanisms. The present studies utilized the TXNRD1 inhibitor auranofin (AFN) to test the hypothesis that Se positively influences Nrf2 activation and selenoenzyme responses in lung epithelial cells. Murine transformed Club cells (mtCCs) were supplemented with 0, 10, 25, or 100 nM Na2SeO3 to create a range of Se conditions and were cultured in the presence or absence of 0.5 μM AFN. TXNRD1 and GPX2 protein expression and enzymatic activity were significantly greater upon Se supplementation (p < 0.05). AFN treatment (0.5 μM AFN for 1 h) significantly inhibited TXNRD1 but not GPx activity (p < 0.001). Recovery of TXNRD1 activity following AFN treatment was significantly enhanced by Se supplementation (p < 0.041). Finally, AFN-induced Nrf2 transcriptional activation was significantly greater in mtCCs supplemented in 25 or 100 nM Na2SeO3 when compared to non-supplemented controls (p < 0.05). Our novel studies indicate that Se levels positively influence Nrf2 activation and selenoenzyme responses following TXNRD1 inhibition. These data suggest that Se status significantly influences physiologic responses to TXNRD1 inhibitors. In conclusion, correction of clinical Se deficiency, if present, will be necessary for optimal therapeutic effectiveness of TXNRD1 inhibitors in the prevention of lung disease.
Collapse
Affiliation(s)
- Rachael Tindell
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stephanie B Wall
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Qian Li
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rui Li
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Katelyn Dunigan
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rachael Wood
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Trent E Tipple
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham, Birmingham, AL, USA; Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL, USA.
| |
Collapse
|
6
|
Li Q, Li R, Wall SB, Dunigan K, Ren C, Jilling T, Rogers LK, Tipple TE. Aurothioglucose does not improve alveolarization or elicit sustained Nrf2 activation in C57BL/6 models of bronchopulmonary dysplasia. Am J Physiol Lung Cell Mol Physiol 2018; 314:L736-L742. [PMID: 29368550 DOI: 10.1152/ajplung.00539.2017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
We previously showed that the thioredoxin reductase-1 (TrxR1) inhibitor aurothioglucose (ATG) improves alveolarization in hyperoxia-exposed newborn C3H/HeN mice. Our data supported a mechanism by which the protective effects of ATG are mediated via sustained nuclear factor E2-related factor 2 (Nrf2) activation in hyperoxia-exposed C3H/HeN mice 72 h after ATG administration. Given that inbred mouse strains have differential sensitivity and endogenous Nrf2 activation by hyperoxia, the present studies utilized two C57BL/6 exposure models to evaluate the effects of ATG on lung development and Nrf2 activation. The first model (0-14 days) was used in our C3H/HeN studies and the 2nd model (4-14 days) is well characterized in C57BL/6 mice. ATG significantly inhibited lung TrxR1 activity in both models; however, there was no effect on parameters of alveolarization in C57BL/6 mice. In sharp contrast to C3H/HeN mice, there was no effect of ATG on pulmonary NADPH quinone oxidoreductase-1 ( Nqo1) and heme oxygenase-1 ( Hmox1) at 72 h in either C57BL/6 model. In conclusion, although ATG inhibited TrxR1 activity in the lungs of newborn C57BL/6 mice, effects on lung development and sustained Nrf2-dependent pulmonary responses were blunted. These findings also highlight the importance of strain-dependent hyperoxic sensitivity in evaluation of potential novel therapies.
Collapse
Affiliation(s)
- Qian Li
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham , Birmingham, Alabama.,Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama
| | - Rui Li
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham , Birmingham, Alabama.,Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama
| | - Stephanie B Wall
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham , Birmingham, Alabama.,Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama
| | - Katelyn Dunigan
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham , Birmingham, Alabama.,Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama
| | - Changchun Ren
- Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama
| | - Tamas Jilling
- Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama
| | - Lynette K Rogers
- Center for Perinatal Research, Research Institute at Nationwide Children's Hospital , Columbus, Ohio
| | - Trent E Tipple
- Neonatal Redox Biology Laboratory, University of Alabama at Birmingham , Birmingham, Alabama.,Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama
| |
Collapse
|
7
|
Li Q, Wall SB, Ren C, Velten M, Hill CL, Locy ML, Rogers LK, Tipple TE. Thioredoxin Reductase Inhibition Attenuates Neonatal Hyperoxic Lung Injury and Enhances Nuclear Factor E2-Related Factor 2 Activation. Am J Respir Cell Mol Biol 2017; 55:419-28. [PMID: 27089175 DOI: 10.1165/rcmb.2015-0228oc] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Oxygen toxicity and antioxidant deficiencies contribute to the development of bronchopulmonary dysplasia. Aurothioglucose (ATG) and auranofin potently inhibit thioredoxin reductase-1 (TrxR1), and TrxR1 disruption activates nuclear factor E2-related factor 2 (Nrf2), a regulator of endogenous antioxidant responses. We have shown previously that ATG safely and effectively prevents lung injury in adult murine models, likely via Nrf2-dependent mechanisms. The current studies tested the hypothesis that ATG would attenuate hyperoxia-induced lung developmental deficits in newborn mice. Newborn C3H/HeN mice were treated with a single dose of ATG or saline within 12 hours of birth and were exposed to either room air or hyperoxia (85% O2). In hyperoxia, ATG potently inhibited TrxR1 activity in newborn murine lungs, attenuated decreases in body weight, increased the transcription of Nrf2-regulated genes nicotinamide adenine dinucleotide phosphate reduced quinone oxidoreductase-1 (NQO1) and heme oxygenase 1, and attenuated alterations in alveolar development. To determine the impact of TrxR1 inhibition on Nrf2 activation in vitro, murine alveolar epithelial-12 cells were treated with auranofin, which inhibited TrxR1 activity, enhanced Nrf2 nuclear levels, and increased NQO1 and heme oxygenase 1 transcription. Our novel data indicate that a single injection of the TrxR1 inhibitor ATG attenuates hyperoxia-induced alterations in alveolar development in newborn mice. Furthermore, our data support a model in which the effects of ATG treatment likely involve Nrf2 activation, which is consistent with our findings in other lung injury models. We conclude that TrxR1 represents a novel therapeutic target to prevent oxygen-mediated neonatal lung injury.
Collapse
Affiliation(s)
- Qian Li
- 1 Neonatal Redox Biology Laboratory.,2 Division of Neonatology, and
| | - Stephanie B Wall
- 1 Neonatal Redox Biology Laboratory.,2 Division of Neonatology, and
| | | | - Markus Velten
- 3 Department of Anesthesiology and Intensive Care Medicine, Rheinische Friedrich-Wilhelms University, University Medical Center, Bonn, Germany; and
| | - Cynthia L Hill
- 4 Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio
| | - Morgan L Locy
- 5 Medical Scientist Training Program, University of Alabama at Birmingham, Birmingham, Alabama
| | - Lynette K Rogers
- 4 Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio
| | - Trent E Tipple
- 1 Neonatal Redox Biology Laboratory.,2 Division of Neonatology, and
| |
Collapse
|
8
|
Chacko BK, Wall SB, Kramer PA, Ravi S, Mitchell T, Johnson MS, Wilson L, Barnes S, Landar A, Darley-Usmar VM. Pleiotropic effects of 4-hydroxynonenal on oxidative burst and phagocytosis in neutrophils. Redox Biol 2016; 9:57-66. [PMID: 27393890 PMCID: PMC4939321 DOI: 10.1016/j.redox.2016.06.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 06/20/2016] [Accepted: 06/21/2016] [Indexed: 01/09/2023] Open
Abstract
Metabolic control of cellular function is significant in the context of inflammation-induced metabolic dysregulation in immune cells. Generation of reactive oxygen species (ROS) such as hydrogen peroxide and superoxide are one of the critical events that modulate the immune response in neutrophils. When activated, neutrophil NADPH oxidases consume large quantities of oxygen to rapidly generate ROS, a process that is referred to as the oxidative burst. These ROS are required for the efficient removal of phagocytized cellular debris and pathogens. In chronic inflammatory diseases, neutrophils are exposed to increased levels of oxidants and pro-inflammatory cytokines that can further prime oxidative burst responses and generate lipid oxidation products such as 4-hydroxynonenal (4-HNE). In this study we hypothesized that since 4-HNE can target glycolysis then this could modify the oxidative burst. To address this the oxidative burst was determined in freshly isolated healthy subject neutrophils using 13-phorbol myristate acetate (PMA) and the extracellular flux analyzer. Neutrophils pretreated with 4-HNE exhibited a significant decrease in the oxidative burst response and phagocytosis. Mass spectrometric analysis of alkyne-HNE treated neutrophils followed by click chemistry detected modification of a number of cytoskeletal, metabolic, redox and signaling proteins that are critical for the NADPH oxidase mediated oxidative burst. These modifications were confirmed using a candidate immunoblot approach for critical proteins of the active NADPH oxidase enzyme complex (Nox2 gp91phox subunit and Rac1 of the NADPH oxidase) and glyceraldehyde phosphate dehydrogenase, a critical enzyme in the metabolic regulation of oxidative burst. Taken together, these data suggest that 4-HNE-induces a pleiotropic mechanism to inhibit neutrophil function. These mechanisms may contribute to the immune dysregulation associated with chronic pathological conditions where 4-HNE is generated. Phagocytosis and glycolysis are inhibited in neutrophils by 4-hydroxynonenal. Click chemistry with alkyne-HNE identifies over 100 potential protein targets. Rac1, NOX2 and GAPDH are modified by 4-HNE. The 4-HNE-dependent inhibition of neutrophil function is mediated by a pleiotropic mechanism.
Collapse
Affiliation(s)
- Balu K Chacko
- Mitochondrial Medicine Laboratory, University of Alabama at Birmingham, United States; Department of Pathology, University of Alabama at Birmingham, United States
| | - Stephanie B Wall
- Department of Pathology, University of Alabama at Birmingham, United States
| | - Philip A Kramer
- Mitochondrial Medicine Laboratory, University of Alabama at Birmingham, United States; Department of Pathology, University of Alabama at Birmingham, United States
| | - Saranya Ravi
- Mitochondrial Medicine Laboratory, University of Alabama at Birmingham, United States; Department of Pathology, University of Alabama at Birmingham, United States
| | - Tanecia Mitchell
- Department of Urology, University of Alabama at Birmingham, United States
| | - Michelle S Johnson
- Mitochondrial Medicine Laboratory, University of Alabama at Birmingham, United States; Department of Pathology, University of Alabama at Birmingham, United States
| | - Landon Wilson
- Department of Pharmacology and Toxicology, The Targeted Metabolomics and Proteomics Laboratory, University of Alabama at Birmingham, United States
| | - Stephen Barnes
- Department of Pharmacology and Toxicology, The Targeted Metabolomics and Proteomics Laboratory, University of Alabama at Birmingham, United States
| | - Aimee Landar
- Department of Pathology, University of Alabama at Birmingham, United States
| | - Victor M Darley-Usmar
- Mitochondrial Medicine Laboratory, University of Alabama at Birmingham, United States; Department of Pathology, University of Alabama at Birmingham, United States.
| |
Collapse
|
9
|
Wall SB, Oh JY, Diers AR, Landar A. Oxidative modification of proteins: an emerging mechanism of cell signaling. Front Physiol 2012; 3:369. [PMID: 23049513 PMCID: PMC3442266 DOI: 10.3389/fphys.2012.00369] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 08/28/2012] [Indexed: 01/01/2023] Open
Abstract
There are a wide variety of reactive species which can affect cell function, including reactive oxygen, nitrogen, and lipid species. Some are formed endogenously through enzymatic or non-enzymatic pathways, and others are introduced through diet or environmental exposure. Many of these reactive species can interact with biomolecules and can result in oxidative post-translational modification of proteins. It is well documented that some oxidative modifications cause macromolecular damage and cell death. However, a growing body of evidence suggests that certain classes of reactive species initiate cell signaling by reacting with specific side chains of peptide residues without causing cell death. This process is generally termed "redox signaling," and its role in physiological and pathological processes is a subject of active investigation. This review will give an overview of oxidative protein modification as a mechanism of redox signaling, including types of reactive species and how they modify proteins, examples of modified proteins, and a discussion about the current concepts in this area.
Collapse
Affiliation(s)
- Stephanie B Wall
- Departments of Pathology, University of Alabama at Birmingham Birmingham, AL, USA ; Center for Free Radical Biology, University of Alabama at Birmingham Birmingham, AL, USA
| | | | | | | |
Collapse
|
10
|
Takahashi K, Wall SB, Suzuki H, Smith AD, Hall S, Poulsen K, Kilian M, Mobley JA, Julian BA, Mestecky J, Novak J, Renfrow MB. Clustered O-glycans of IgA1: defining macro- and microheterogeneity by use of electron capture/transfer dissociation. Mol Cell Proteomics 2010; 9:2545-57. [PMID: 20823119 DOI: 10.1074/mcp.m110.001834] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
IgA nephropathy (IgAN) is the most common primary glomerulonephritis in the world. Aberrantly glycosylated IgA1, with galactose (Gal)-deficient hinge region (HR) O-glycans, plays a pivotal role in the pathogenesis of the disease. It is not known whether the glycosylation defect occurs randomly or preferentially at specific sites. We have described the utility of activated ion-electron capture dissociation (AI-ECD) mass spectrometric analysis of IgA1 O-glycosylation. However, locating and characterizing the entire range of O-glycan attachment sites are analytically challenging due to the clustered serine and threonine residues in the HR of IgA1 heavy chain. To address this problem, we analyzed all glycoforms of the HR glycopeptides of a Gal-deficient IgA1 myeloma protein, mimicking the aberrant IgA1 in patients with IgAN, by use of a combination of IgA-specific proteases + trypsin and AI-ECD Fourier transform ion cyclotron resonance (FT-ICR) tandem mass spectrometry (MS/MS). The IgA-specific proteases provided a variety of IgA1 HR fragments that allowed unambiguous localization of all O-glycosylation sites in the six most abundant glycoforms, including the sites deficient in Gal. Additionally, this protocol was adapted for on-line liquid chromatography (LC)-AI-ECD MS/MS and LC-electron transfer dissociation MS/MS analysis. Our results thus represent a new clinically relevant approach that requires ECD/electron transfer dissociation-type fragmentation to define the molecular events leading to pathogenesis of a chronic kidney disease. Furthermore, this work offers generally applicable principles for the analysis of clustered sites of O-glycosylation.
Collapse
Affiliation(s)
- Kazuo Takahashi
- Biomedical FT-ICR MS Laboratory, Department of Biochemistry and Molecular Genetics, University of Alabama, Birmingham, Alabama 35294-0005, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Gomes MM, Wall SB, Takahashi K, Novak J, Renfrow MB, Herr AB. Analysis of IgA1 N-glycosylation and its contribution to FcalphaRI binding. Biochemistry 2008; 47:11285-99. [PMID: 18826328 DOI: 10.1021/bi801185b] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The IgA isotype of human antibodies triggers inflammatory responses via the IgA-specific receptor FcalphaRI (CD89). Structural studies have suggested that IgA1 N-glycans could modulate the interaction with FcalphaRI. We have carried out detailed biophysical analyses of three IgA1 samples purified from human serum and recombinant IgA1-Fc and compared their binding to FcalphaRI. Analytical ultracentrifugation revealed wide variation in the distribution of polymeric species between IgA1 samples, and Fourier transform ion cyclotron resonance mass spectrometry showed overlapping but distinct populations of N-glycan species between IgA1 samples. Kinetic and equilibrium data from surface plasmon resonance experiments revealed that variation in the IgA1 C H2 N-glycans had no effect on the kinetics or affinity constants for binding to FcalphaRI. Indeed, complete enzymatic removal of the IgA1 N-glycans yielded superimposable binding curves. These findings have implications for renal diseases such as IgA nephropathy.
Collapse
Affiliation(s)
- Michelle M Gomes
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267-0524, USA
| | | | | | | | | | | |
Collapse
|
12
|
Novak J, Suzuki H, Wall SB, Lyas CN, Gomes MM, Moldoveanu Z, Julian BA, Hall S, Brown R, Kilian M, Poulsen K, Mestecky J, Herr AB, Renfrow MB. Analysis of O‐glycosylation of IgA1: Implications for IgA Nephropathy (IgAN). FASEB J 2008. [DOI: 10.1096/fasebj.22.2_supplement.469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jan Novak
- University of Alabama at BirminghamBirminghamAL
| | | | | | | | | | | | | | - Stacy Hall
- University of Alabama at BirminghamBirminghamAL
| | | | | | | | | | - Adrew B. Herr
- University of Cincinnati College of MedicineCincinnatiOH
| | | |
Collapse
|