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Piao L, Fang YH, Fisher M, Hamanaka RB, Ousta A, Wu R, Mutlu GM, Garcia AJ, Archer SL, Sharp WW. Dynamin-related protein 1 is a critical regulator of mitochondrial calcium homeostasis during myocardial ischemia/reperfusion injury. FASEB J 2024; 38:e23379. [PMID: 38133921 DOI: 10.1096/fj.202301040rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 11/17/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023]
Abstract
Dynamin-related protein 1 (Drp1) is a cytosolic GTPase protein that when activated translocates to the mitochondria, meditating mitochondrial fission and increasing reactive oxygen species (ROS) in cardiomyocytes. Drp1 has shown promise as a therapeutic target for reducing cardiac ischemia/reperfusion (IR) injury; however, the lack of specificity of some small molecule Drp1 inhibitors and the reliance on the use of Drp1 haploinsufficient hearts from older mice have left the role of Drp1 in IR in question. Here, we address these concerns using two approaches, using: (a) short-term (3 weeks), conditional, cardiomyocyte-specific, Drp1 knockout (KO) and (b) a novel, highly specific Drp1 GTPase inhibitor, Drpitor1a. Short-term Drp1 KO mice exhibited preserved exercise capacity and cardiac contractility, and their isolated cardiac mitochondria demonstrated increased mitochondrial complex 1 activity, respiratory coupling, and calcium retention capacity compared to controls. When exposed to IR injury in a Langendorff perfusion system, Drp1 KO hearts had preserved contractility, decreased reactive oxygen species (ROS), enhanced mitochondrial calcium capacity, and increased resistance to mitochondrial permeability transition pore (MPTP) opening. Pharmacological inhibition of Drp1 with Drpitor1a following ischemia, but before reperfusion, was as protective as Drp1 KO for cardiac function and mitochondrial calcium homeostasis. In contrast to the benefits of short-term Drp1 inhibition, prolonged Drp1 ablation (6 weeks) resulted in cardiomyopathy. Drp1 KO hearts were also associated with decreased ryanodine receptor 2 (RyR2) protein expression and pharmacological inhibition of the RyR2 receptor decreased ROS in post-IR hearts suggesting that changes in RyR2 may have a role in Drp1 KO mediated cardioprotection. We conclude that Drp1-mediated increases in myocardial ROS production and impairment of mitochondrial calcium handling are key mechanisms of IR injury. Short-term inhibition of Drp1 is a promising strategy to limit early myocardial IR injury which is relevant for the therapy of acute myocardial infarction, cardiac arrest, and heart transplantation.
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Affiliation(s)
- Lin Piao
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Yong-Hu Fang
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Michael Fisher
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Robert B Hamanaka
- Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Alaa Ousta
- Department of Emergency Medicine, Duke University, Durham, North Carolina, USA
| | - Rongxu Wu
- Section of Cardiology, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, Chicago, Illinois, USA
- Institute for Integrative Physiology, University of Chicago, Chicago, Illinois, USA
| | - Alfredo J Garcia
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
- Institute for Integrative Physiology, University of Chicago, Chicago, Illinois, USA
- The University of Chicago Neuroscience Institute, University of Chicago, Chicago, Illinois, USA
| | - Stephen L Archer
- Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Willard W Sharp
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
- Institute for Integrative Physiology, University of Chicago, Chicago, Illinois, USA
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2
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Reed EB, Orbeta S, Miao BA, Sitikov A, Chen B, Levitan I, Solway J, Mutlu GM, Fang Y, Mongin AA, Dulin NO. Anoctamin-1 is induced by TGF-β and contributes to lung myofibroblast differentiation. Am J Physiol Lung Cell Mol Physiol 2024; 326:L111-L123. [PMID: 38084409 DOI: 10.1152/ajplung.00155.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 11/07/2023] [Accepted: 11/29/2023] [Indexed: 12/26/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a devastating disease characterized by progressive scarring of the lungs and resulting in deterioration in lung function. Transforming growth factor-β (TGF-β) is one of the most established drivers of fibrotic processes. TGF-β promotes the transformation of tissue fibroblasts to myofibroblasts, a key finding in the pathogenesis of pulmonary fibrosis. We report here that TGF-β robustly upregulates the expression of the calcium-activated chloride channel anoctamin-1 (ANO1) in human lung fibroblasts (HLFs) at mRNA and protein levels. ANO1 is readily detected in fibrotic areas of IPF lungs in the same area with smooth muscle α-actin (SMA)-positive myofibroblasts. TGF-β-induced myofibroblast differentiation (determined by the expression of SMA, collagen-1, and fibronectin) is significantly inhibited by a specific ANO1 inhibitor, T16Ainh-A01, or by siRNA-mediated ANO1 knockdown. T16Ainh-A01 and ANO1 siRNA attenuate profibrotic TGF-β signaling, including activation of RhoA pathway and AKT, without affecting initial Smad2 phosphorylation. Mechanistically, TGF-β treatment of HLFs results in a significant increase in intracellular chloride levels, which is prevented by T16Ainh-A01 or by ANO1 knockdown. The downstream mechanism involves the chloride-sensing "with-no-lysine (K)" kinase (WNK1). WNK1 siRNA significantly attenuates TGF-β-induced myofibroblast differentiation and signaling (RhoA pathway and AKT), whereas the WNK1 kinase inhibitor WNK463 is largely ineffective. Together, these data demonstrate that 1) ANO1 is a TGF-β-inducible chloride channel that contributes to increased intracellular chloride concentration in response to TGF-β; and 2) ANO1 mediates TGF-β-induced myofibroblast differentiation and fibrotic signaling in a manner dependent on WNK1 protein but independent of WNK1 kinase activity.NEW & NOTEWORTHY This study describes a novel mechanism of differentiation of human lung fibroblasts (HLFs) to myofibroblasts: the key process in the pathogenesis of pulmonary fibrosis. Transforming growth factor-β (TGF-β) drives the expression of calcium-activated chloride channel anoctmin-1 (ANO1) leading to an increase in intracellular levels of chloride. The latter recruits chloride-sensitive with-no-lysine (K) kinase (WNK1) to activate profibrotic RhoA and AKT signaling pathways, possibly through activation of mammalian target of rapamycin complex-2 (mTORC2), altogether promoting myofibroblast differentiation.
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Affiliation(s)
- Eleanor B Reed
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
| | - Shaina Orbeta
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, United States
| | - Bernadette A Miao
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
| | - Albert Sitikov
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
| | - Bohao Chen
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
| | - Irena Levitan
- Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois, United States
| | - Julian Solway
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
| | - Yun Fang
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
| | - Alexander A Mongin
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, United States
| | - Nickolai O Dulin
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois, United States
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3
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Reed EB, Orbeta S, Miao BA, Sitikov A, Chen B, Levitan I, Solway J, Mutlu GM, Fang Y, Mongin AA, Dulin NO. Anoctamin-1 is induced by TGF-beta and contributes to lung myofibroblast differentiation. bioRxiv 2023:2023.06.07.544093. [PMID: 37333255 PMCID: PMC10274757 DOI: 10.1101/2023.06.07.544093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a devastating disease characterized by progressive scarring of the lungs and resulting in deterioration in lung function. Transforming growth factor-beta (TGF-β) is one of the most established drivers of fibrotic processes. TGF-β promotes transformation of tissue fibroblasts to myofibroblasts, a key finding in the pathogenesis of pulmonary fibrosis. We report here that TGF-β robustly upregulates the expression of the calcium-activated chloride channel Anoctamin-1 (ANO1) in human lung fibroblasts (HLF) at mRNA and protein levels. ANO1 is readily detected in fibrotic areas of IPF lungs in the same area with smooth muscle alpha-actin (SMA)-positive myofibroblasts. TGF-β-induced myofibroblast differentiation (determined by the expression of SMA, collagen-1 and fibronectin) is significantly inhibited by a specific ANO1 inhibitor, T16Ainh-A01, or by siRNA-mediated ANO1 knockdown. T16Ainh-A01 and ANO1 siRNA attenuate pro-fibrotic TGF-β signaling, including activation of RhoA pathway and AKT, without affecting initial Smad2 phosphorylation. Mechanistically, TGF-β treatment of HLF results in a significant increase in intracellular chloride levels, which is prevented by T16Ainh-A01 or by ANO1 knockdown. The downstream mechanism involves the chloride-sensing "with-no-lysine (K)" kinase (WNK1). WNK1 siRNA significantly attenuates TGF-β-induced myofibroblast differentiation and signaling (RhoA pathway and AKT), whereas the WNK1 kinase inhibitor WNK463 is largely ineffective. Together, these data demonstrate that (i) ANO1 is a TGF-β-inducible chloride channel that contributes to increased intracellular chloride concentration in response to TGF-β; and (ii) ANO1 mediates TGF-β-induced myofibroblast differentiation and fibrotic signaling in a manner dependent on WNK1 protein, but independent of WNK1 kinase activity.
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Affiliation(s)
- Eleanor B. Reed
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
| | - Shaina Orbeta
- Department of Neuroscience & Experimental Therapeutics, Albany Medical College, Albany, NY
| | - Bernadette A. Miao
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
| | - Albert Sitikov
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
| | - Bohao Chen
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
| | - Irena Levitan
- Departments of Medicine, Pharmacology and Bioengineering, University of Illinois at Chicago, Chicago, IL
| | - Julian Solway
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
| | - Gökhan M. Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
| | - Yun Fang
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
| | - Alexander A. Mongin
- Department of Neuroscience & Experimental Therapeutics, Albany Medical College, Albany, NY
| | - Nickolai O. Dulin
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, USA
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4
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Meliton AY, Cetin-Atalay R, Tian Y, Szafran JCH, Shin KWD, Cho T, Sun KA, Woods PS, Shamaa OR, Chen B, Muir A, Mutlu GM, Hamanaka RB. Mitochondrial One-Carbon Metabolism is Required for TGF-β-Induced Glycine Synthesis and Collagen Protein Production. bioRxiv 2023:2023.11.07.566074. [PMID: 37986788 PMCID: PMC10659399 DOI: 10.1101/2023.11.07.566074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
A hallmark of Idiopathic Pulmonary Fibrosis is the TGF-β-dependent activation of lung fibroblasts, leading to excessive deposition of collagen proteins and progressive scarring. We have previously shown that synthesis of collagen by lung fibroblasts requires de novo synthesis of glycine, the most abundant amino acid in collagen protein. TGF-β upregulates the expression of the enzymes of the de novo serine/glycine synthesis pathway in lung fibroblasts through mTORC1 and ATF4-dependent transcriptional programs. SHMT2, the final enzyme of the de novo serine/glycine synthesis pathway, transfers a one-carbon unit from serine to tetrahydrofolate (THF), producing glycine and 5,10-methylene-THF (meTHF). meTHF is converted back to THF in the mitochondrial one-carbon (1C) pathway through the sequential actions of MTHFD2 (which converts meTHF to 10-formyl-THF), and either MTHFD1L, which produces formate, or ALDH1L2, which produces CO2. It is unknown how the mitochondrial 1C pathway contributes to glycine biosynthesis or collagen protein production in fibroblasts, or fibrosis in vivo. Here, we demonstrate that TGF-β induces the expression of MTHFD2, MTHFD1L, and ALDH1L2 in human lung fibroblasts. MTHFD2 expression was required for TGF-β-induced cellular glycine accumulation and collagen protein production. Combined knockdown of both MTHFD1L and ALDH1L2 also inhibited glycine accumulation and collagen protein production downstream of TGF-β; however knockdown of either protein alone had no inhibitory effect, suggesting that lung fibroblasts can utilize either enzyme to regenerate THF. Pharmacologic inhibition of MTHFD2 recapitulated the effects of MTHFD2 knockdown in lung fibroblasts and ameliorated fibrotic responses after intratracheal bleomycin instillation in vivo. Our results provide insight into the metabolic requirements of lung fibroblasts and provide support for continued development of MTHFD2 inhibitors for the treatment of IPF and other fibrotic diseases.
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Affiliation(s)
- Angelo Y Meliton
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Rengül Cetin-Atalay
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Yufeng Tian
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Jennifer C Houpy Szafran
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Kun Woo D Shin
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Takugo Cho
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Kaitlyn A Sun
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Parker S Woods
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Obada R Shamaa
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Bohao Chen
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Alexander Muir
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL 60637
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
| | - Robert B Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL 60637
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5
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Cetin-Atalay R, Meliton AY, Ozcan C, Woods PS, Sun KA, Fang Y, Hamanaka RB, Mutlu GM. Loss of heme oxygenase 2 causes reduced expression of genes in cardiac muscle development and contractility and leads to cardiomyopathy in mice. PLoS One 2023; 18:e0292990. [PMID: 37844118 PMCID: PMC10578579 DOI: 10.1371/journal.pone.0292990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 10/03/2023] [Indexed: 10/18/2023] Open
Abstract
Obstructive sleep apnea (OSA) is a common breathing disorder that affects a significant portion of the adult population. In addition to causing excessive daytime sleepiness and neurocognitive effects, OSA is an independent risk factor for cardiovascular disease; however, the underlying mechanisms are not completely understood. Using exposure to intermittent hypoxia (IH) to mimic OSA, we have recently reported that mice exposed to IH exhibit endothelial cell (EC) activation, which is an early process preceding the development of cardiovascular disease. Although widely used, IH models have several limitations such as the severity of hypoxia, which does not occur in most patients with OSA. Recent studies reported that mice with deletion of hemeoxygenase 2 (Hmox2-/-), which plays a key role in oxygen sensing in the carotid body, exhibit spontaneous apneas during sleep and elevated levels of catecholamines. Here, using RNA-sequencing we investigated the transcriptomic changes in aortic ECs and heart tissue to understand the changes that occur in Hmox2-/- mice. In addition, we evaluated cardiac structure, function, and electrical properties by using echocardiogram and electrocardiogram in these mice. We found that Hmox2-/- mice exhibited aortic EC activation. Transcriptomic analysis in aortic ECs showed differentially expressed genes enriched in blood coagulation, cell adhesion, cellular respiration and cardiac muscle development and contraction. Similarly, transcriptomic analysis in heart tissue showed a differentially expressed gene set enriched in mitochondrial translation, oxidative phosphorylation and cardiac muscle development. Analysis of transcriptomic data from aortic ECs and heart tissue showed loss of Hmox2 gene might have common cellular network footprints on aortic endothelial cells and heart tissue. Echocardiographic evaluation showed that Hmox2-/- mice develop progressive dilated cardiomyopathy and conduction abnormalities compared to Hmox2+/+ mice. In conclusion, we found that Hmox2-/- mice, which spontaneously develop apneas exhibit EC activation and transcriptomic and functional changes consistent with heart failure.
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Affiliation(s)
- Rengul Cetin-Atalay
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Angelo Y. Meliton
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Cevher Ozcan
- Department of Medicine, Section of Cardiology, University of Chicago, Chicago, Illinois, United States of America
| | - Parker S. Woods
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Kaitlyn A. Sun
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Yun Fang
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Robert B. Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Gökhan M. Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois, United States of America
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6
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Huang X, Zhang X, Machireddy N, Evans CE, Trewartha SD, Hu G, Fang Y, Mutlu GM, Wu D, Zhao YY. Endothelial FoxM1 reactivates aging-impaired endothelial regeneration for vascular repair and resolution of inflammatory lung injury. Sci Transl Med 2023; 15:eabm5755. [PMID: 37585502 PMCID: PMC10894510 DOI: 10.1126/scitranslmed.abm5755] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 07/28/2023] [Indexed: 08/18/2023]
Abstract
Aging is a major risk factor of high incidence and increased mortality of acute respiratory distress syndrome (ARDS). Here, we demonstrated that persistent lung injury and high mortality in aged mice after sepsis challenge were attributable to impaired endothelial regeneration and vascular repair. Genetic lineage tracing study showed that endothelial regeneration after sepsis-induced vascular injury was mediated by lung resident endothelial proliferation in young adult mice, whereas this intrinsic regenerative program was impaired in aged mice. Expression of forkhead box M1 (FoxM1), an important mediator of endothelial regeneration in young mice, was not induced in lungs of aged mice. Transgenic FOXM1 expression or in vivo endothelium-targeted nanoparticle delivery of the FOXM1 gene driven by an endothelial cell (EC)-specific promoter reactivated endothelial regeneration, normalized vascular repair and resolution of inflammation, and promoted survival in aged mice after sepsis challenge. In addition, treatment with the FDA-approved DNA demethylating agent decitabine was sufficient to reactivate FoxM1-dependent endothelial regeneration in aged mice, reverse aging-impaired resolution of inflammatory injury, and promote survival. Mechanistically, aging-induced Foxm1 promoter hypermethylation in mice, which could be inhibited by decitabine treatment, inhibited Foxm1 induction after sepsis challenge. In COVID-19 lung autopsy samples, FOXM1 was not induced in vascular ECs of elderly patients in their 80s, in contrast with middle-aged patients (aged 50 to 60 years). Thus, reactivation of FoxM1-mediated endothelial regeneration and vascular repair may represent a potential therapy for elderly patients with ARDS.
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Affiliation(s)
- Xiaojia Huang
- Program for Lung and Vascular Biology and Section for Injury Repair and Regeneration Research, Stanley Manne Children’s Research Institute, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL60611, USA
- Department of Pediatrics, Division of Critical Care, Northwestern University Feinberg School of Medicine. Chicago, IL60611, USA
| | - Xianming Zhang
- Program for Lung and Vascular Biology and Section for Injury Repair and Regeneration Research, Stanley Manne Children’s Research Institute, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL60611, USA
- Department of Pediatrics, Division of Critical Care, Northwestern University Feinberg School of Medicine. Chicago, IL60611, USA
| | - Narsa Machireddy
- Program for Lung and Vascular Biology and Section for Injury Repair and Regeneration Research, Stanley Manne Children’s Research Institute, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL60611, USA
- Department of Pediatrics, Division of Critical Care, Northwestern University Feinberg School of Medicine. Chicago, IL60611, USA
| | - Colin E. Evans
- Program for Lung and Vascular Biology and Section for Injury Repair and Regeneration Research, Stanley Manne Children’s Research Institute, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL60611, USA
- Department of Pediatrics, Division of Critical Care, Northwestern University Feinberg School of Medicine. Chicago, IL60611, USA
| | - Shawn D. Trewartha
- Program for Lung and Vascular Biology and Section for Injury Repair and Regeneration Research, Stanley Manne Children’s Research Institute, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL60611, USA
- Department of Pediatrics, Division of Critical Care, Northwestern University Feinberg School of Medicine. Chicago, IL60611, USA
| | - Guochang Hu
- Departments of Anesthesiology and Pharmacology, University of Illinois College of Medicine, Chicago, IL60607, USA
| | - Yun Fang
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL60637, USA
| | - Gökhan M. Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL60637, USA
| | - David Wu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL60637, USA
| | - You-Yang Zhao
- Program for Lung and Vascular Biology and Section for Injury Repair and Regeneration Research, Stanley Manne Children’s Research Institute, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL60611, USA
- Department of Pediatrics, Division of Critical Care, Northwestern University Feinberg School of Medicine. Chicago, IL60611, USA
- Department of Pharmacology
- Department of Medicine, Division of Pulmonary and Critical Care Medicine
- Feinberg Cardiovascular and Renal Research Institute, Northwestern University Feinberg School of Medicine. Chicago, IL60611, USA
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7
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Cetin-Atalay R, Meliton AY, Sun KA, Glass ME, Woods PS, Peng YJ, Fang Y, Hamanaka RB, Prabhakar NR, Mutlu GM. Intermittent hypoxia inhibits epinephrine-induced transcriptional changes in human aortic endothelial cells. Sci Rep 2022; 12:17167. [PMID: 36229484 PMCID: PMC9561121 DOI: 10.1038/s41598-022-21614-5] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 09/29/2022] [Indexed: 02/02/2023] Open
Abstract
Obstructive sleep apnea (OSA) is an independent risk factor for cardiovascular disease. While intermittent hypoxia (IH) and catecholamine release play an important role in this increased risk, the mechanisms are incompletely understood. We have recently reported that IH causes endothelial cell (EC) activation, an early phenomenon in the development of cardiovascular disease, via IH-induced catecholamine release. Here, we investigated the effects of IH and epinephrine on gene expression in human aortic ECs using RNA-sequencing. We found a significant overlap between IH and epinephrine-induced differentially expressed genes (DEGs) including enrichment in leukocyte migration, cytokine-cytokine receptor interaction, cell adhesion and angiogenesis. Epinephrine caused higher number of DEGs compared to IH. Interestingly, IH when combined with epinephrine had an inhibitory effect on epinephrine-induced gene expression. Combination of IH and epinephrine induced MT1G (Metallothionein 1G), which has been shown to be highly expressed in ECs from parts of aorta (i.e., aortic arch) where atherosclerosis is more likely to occur. In conclusion, epinephrine has a greater effect than IH on EC gene expression in terms of number of genes and their expression level. IH inhibited the epinephrine-induced transcriptional response. Further investigation of the interaction between IH and epinephrine is needed to better understand how OSA causes cardiovascular disease.
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Affiliation(s)
- Rengul Cetin-Atalay
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA
| | - Angelo Y. Meliton
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA
| | - Kaitlyn A. Sun
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA
| | - Mariel E. Glass
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA
| | - Parker S. Woods
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA
| | - Ying-Jie Peng
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Emergency Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Institute for Integrative Physiology, University of Chicago, Chicago, IL USA
| | - Yun Fang
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA ,grid.170205.10000 0004 1936 7822Institute for Integrative Physiology, University of Chicago, Chicago, IL USA
| | - Robert B. Hamanaka
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA ,grid.170205.10000 0004 1936 7822Institute for Integrative Physiology, University of Chicago, Chicago, IL USA
| | - Nanduri R. Prabhakar
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Emergency Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Institute for Integrative Physiology, University of Chicago, Chicago, IL USA
| | - Gökhan M. Mutlu
- grid.170205.10000 0004 1936 7822Department of Medicine, University of Chicago, Chicago, IL USA ,grid.170205.10000 0004 1936 7822Section of Pulmonary and Critical Care Medicine, University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL 60637 USA ,grid.170205.10000 0004 1936 7822Institute for Integrative Physiology, University of Chicago, Chicago, IL USA
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8
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Hamanaka RB, Mutlu GM. Our Compliments to the Authors: Decay Accelerating Factor and the Complement System in Pulmonary Fibrosis. Am J Respir Cell Mol Biol 2022; 67:415-416. [PMID: 35901283 PMCID: PMC9564930 DOI: 10.1165/rcmb.2022-0268ed] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Robert B. Hamanaka
- Section of Pulmonary and Critical Care MedicineThe University of ChicagoChicago, Illinois
| | - Gökhan M. Mutlu
- Section of Pulmonary and Critical Care MedicineThe University of ChicagoChicago, Illinois
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9
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Woods PS, Kimmig LM, Sun KA, Meliton AY, Shamaa OR, Tian Y, Cetin-Atalay R, Sharp WW, Hamanaka RB, Mutlu GM. HIF-1α induces glycolytic reprograming in tissue-resident alveolar macrophages to promote cell survival during acute lung injury. eLife 2022; 11:e77457. [PMID: 35822617 PMCID: PMC9323005 DOI: 10.7554/elife.77457] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 07/10/2022] [Indexed: 12/03/2022] Open
Abstract
Cellular metabolism is a critical regulator of macrophage effector function. Tissue-resident alveolar macrophages (TR-AMs) inhabit a unique niche marked by high oxygen and low glucose. We have recently shown that in contrast to bone marrow-derived macrophages (BMDMs), TR-AMs do not utilize glycolysis and instead predominantly rely on mitochondrial function for their effector response. It is not known how changes in local oxygen concentration that occur during conditions such as acute respiratory distress syndrome (ARDS) might affect TR-AM metabolism and function; however, ARDS is associated with progressive loss of TR-AMs, which correlates with the severity of disease and mortality. Here, we demonstrate that hypoxia robustly stabilizes HIF-1α in TR-AMs to promote a glycolytic phenotype. Hypoxia altered TR-AM metabolite signatures, cytokine production, and decreased their sensitivity to the inhibition of mitochondrial function. By contrast, hypoxia had minimal effects on BMDM metabolism. The effects of hypoxia on TR-AMs were mimicked by FG-4592, a HIF-1α stabilizer. Treatment with FG-4592 decreased TR-AM death and attenuated acute lung injury in mice. These findings reveal the importance of microenvironment in determining macrophage metabolic phenotype and highlight the therapeutic potential in targeting cellular metabolism to improve outcomes in diseases characterized by acute inflammation.
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Affiliation(s)
- Parker S Woods
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Lucas M Kimmig
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Kaitlyn A Sun
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Angelo Y Meliton
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Obada R Shamaa
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Yufeng Tian
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Rengül Cetin-Atalay
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Willard W Sharp
- Department of Medicine, Section of Emergency Medicine, The University of ChicagoChicagoUnited States
| | - Robert B Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of ChicagoChicagoUnited States
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10
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Patel B, Kimmig LM, Law A, Walkey A, Mutlu GM, Bos LDJ. WITHDRAWN: Update in Critical Care 2021. Am J Respir Crit Care Med 2022. [PMID: 35446238 DOI: 10.1164/rccm.202202-0247up] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 04/20/2022] [Indexed: 11/16/2022] Open
Abstract
Ahead of Print article withdrawn by publisher.
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Affiliation(s)
- Bhakti Patel
- University of Chicago, Department of Medicine, Section of Pulmonary and Critical Care, Chicago, Illinois, United States
| | - Lucas M Kimmig
- University of Chicago, 2462, Medicine, Chicago, Illinois, United States
| | - Anica Law
- Boston University School of Medicine, 12259, Department of Medicine, The Pulmonary Center, Boston, Massachusetts, United States
| | - Allan Walkey
- Boston University School of Medicine, Pulmonary Center, Boston, Massachusetts, United States
| | | | - Lieuwe D J Bos
- University of Amsterdam, 1234, Department of Intensive Care & Laboratory of Experimental Intensive Care and Anesthesiology, Academic Medical Center, Amsterdam, Netherlands;
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11
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Wu D, Lee TH, Huang RT, D. Guzy R, Schoettler N, Adegunsoye A, Mueller J, Husain A, I. Sperling A, Mutlu GM, Fang Y. SARS-CoV-2 Infection Is Associated with Reduced Krüppel-like Factor 2 in Human Lung Autopsy. Am J Respir Cell Mol Biol 2021; 65:222-226. [PMID: 33971111 PMCID: PMC8399572 DOI: 10.1165/rcmb.2020-0564le] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Yun Fang
- The University of ChicagoChicago, Illinois
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12
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Khemani RG, Lee JT, Wu D, Schenck EJ, Hayes MM, Kritek PA, Mutlu GM, Gershengorn HB, Coudroy R. Update in Critical Care 2020. Am J Respir Crit Care Med 2021; 203:1088-1098. [PMID: 33734938 DOI: 10.1164/rccm.202102-0336up] [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: 11/16/2022] Open
Affiliation(s)
- Robinder G Khemani
- Pediatric ICU, Department of Anesthesiology and Critical Care Medicine, Children's Hospital Los Angeles, Los Angeles, California.,Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Jessica T Lee
- Division of Pulmonary, Allergy and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - David Wu
- Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Edward J Schenck
- Division of Pulmonary and Critical Care Medicine, Joan and Sanford I. Weill Department of Medicine, Weill Cornell Medicine, New York, New York.,NewYork-Presbyterian Hospital, Weill Cornell Medical Center, New York, New York
| | - Margaret M Hayes
- Division of Pulmonary, Critical Care, and Sleep Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Patricia A Kritek
- Division of Pulmonary, Critical Care and Sleep Medicine, School of Medicine, University of Washington Seattle, Washington
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Hayley B Gershengorn
- Division of Pulmonary, Critical Care, and Sleep Medicine, Miller School of Medicine, University of Miami, Miami, Florida.,Division of Critical Care Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - Rémi Coudroy
- Institut National de la Santé et de la Recherche Médicale, Poitiers, France; and.,Médecine Intensive Réanimation, Centre Hospitalier Universitaire de Poitiers, Poitiers, France
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13
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Cetin-Atalay R, Meliton AY, Wu D, Woods PS, Sun KA, Peng YJ, Nanduri J, Su X, Fang Y, Hamanaka RB, Prabhakar N, Mutlu GM. Intermittent Hypoxia-Induced Activation of Endothelial Cells Is Mediated via Sympathetic Activation-Dependent Catecholamine Release. Front Physiol 2021; 12:701995. [PMID: 34322038 PMCID: PMC8311436 DOI: 10.3389/fphys.2021.701995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 06/22/2021] [Indexed: 02/03/2023] Open
Abstract
Obstructive sleep apnea (OSA) is a common breathing disorder affecting a significant percentage of the adult population. OSA is an independent risk factor for cardiovascular disease (CVD); however, the underlying mechanisms are not completely understood. Since the severity of hypoxia correlates with some of the cardiovascular effects, intermittent hypoxia (IH) is thought to be one of the mechanisms by which OSA may cause CVD. Here, we investigated the effect of IH on endothelial cell (EC) activation, characterized by the expression of inflammatory genes, that is known to play an important role in the pathogenesis of CVD. Exposure of C57BL/6 mice to IH led to aortic EC activation, while in vitro exposure of ECs to IH failed to do so, suggesting that IH does not induce EC activation directly, but indirectly. One of the consequences of IH is activation of the sympathetic nervous system and catecholamine release. We found that exposure of mice to IH caused elevation of circulating levels of catecholamines. Inhibition of the IH-induced increase in catecholamines by pharmacologic inhibition or by adrenalectomy or carotid body ablation prevented the IH-induced EC activation in mice. Supporting a key role for catecholamines, epinephrine alone was sufficient to cause EC activation in vivo and in vitro. Together, these results suggested that IH does not directly induce EC activation, but does so indirectly via release of catecholamines. These results suggest that targeting IH-induced sympathetic nerve activity and catecholamine release may be a potential therapeutic target to attenuate the CV effects of OSA.
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Affiliation(s)
- Rengul Cetin-Atalay
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
| | - Angelo Y Meliton
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
| | - David Wu
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
| | - Parker S Woods
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
| | - Kaitlyn A Sun
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
| | - Ying-Jie Peng
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Emergency Medicine, University of Chicago, Chicago, IL, United States.,Institute for Integrative Physiology, University of Chicago, Chicago, IL, United States
| | - Jayasri Nanduri
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Emergency Medicine, University of Chicago, Chicago, IL, United States.,Institute for Integrative Physiology, University of Chicago, Chicago, IL, United States
| | - Xiaoyu Su
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Emergency Medicine, University of Chicago, Chicago, IL, United States.,Institute for Integrative Physiology, University of Chicago, Chicago, IL, United States
| | - Yun Fang
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States.,Institute for Integrative Physiology, University of Chicago, Chicago, IL, United States
| | - Robert B Hamanaka
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States.,Institute for Integrative Physiology, University of Chicago, Chicago, IL, United States
| | - Nanduri Prabhakar
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Emergency Medicine, University of Chicago, Chicago, IL, United States.,Institute for Integrative Physiology, University of Chicago, Chicago, IL, United States
| | - Gökhan M Mutlu
- Department of Medicine, University of Chicago, Chicago, IL, United States.,Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States.,Institute for Integrative Physiology, University of Chicago, Chicago, IL, United States
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14
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Hamanaka RB, Mutlu GM. The role of metabolic reprogramming and de novo amino acid synthesis in collagen protein production by myofibroblasts: implications for organ fibrosis and cancer. Amino Acids 2021; 53:1851-1862. [PMID: 33963932 DOI: 10.1007/s00726-021-02996-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 04/29/2021] [Indexed: 12/18/2022]
Abstract
Fibrosis is a pathologic condition resulting from aberrant wound healing responses that lead to excessive accumulation of extracellular matrix components, distortion of organ architecture, and loss of organ function. Fibrotic disease can affect every organ system; moreover, fibrosis is an important microenvironmental component of many cancers, including pancreatic, cervical, and hepatocellular cancers. Fibrosis is also an independent risk factor for cancer. Taken together, organ fibrosis contributes to up to 45% of all deaths worldwide. There are no approved therapies that halt or reverse fibrotic disease, highlighting the great need for novel therapeutic targets. At the heart of almost all fibrotic disease is the TGF-β-mediated differentiation of fibroblasts into myofibroblasts, the primary cell type responsible for the production of collagen and other matrix proteins and distortion of tissue architecture. Recent advances, particularly in the field of lung fibrosis, have highlighted the role that metabolic reprogramming plays in the pathogenic phenotype of myofibroblasts, particularly the induction of de novo amino acid synthesis pathways that are required to support collagen matrix production by these cells. In this review, we will discuss the metabolic changes associated with myofibroblast differentiation, focusing on the de novo production of glycine and proline, two amino acids which compose over half of the primary structure of collagen protein. We will also discuss the important role that synthesis of these amino acids plays in regulating cellular redox balance and epigenetic state.
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Affiliation(s)
- Robert B Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL, 60637, USA
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, 5841 S. Maryland Avenue, MC6026, Chicago, IL, 60637, USA.
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15
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Zhang Y, Wang L, Mutlu GM, Cai H. More to Explore: Further Definition of Risk Factors for COPD - Differential Gender Difference, Modest Elevation in PM 2. 5, and e-Cigarette Use. Front Physiol 2021; 12:669152. [PMID: 34025456 PMCID: PMC8131967 DOI: 10.3389/fphys.2021.669152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 03/11/2021] [Indexed: 11/29/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a severe respiratory disease with high morbidity and mortality, representing the third leading cause of death worldwide. Traditional risk factors for COPD include aging, genetic predisposition, cigarette smoking, exposure to environmental pollutes, occupational exposure, and individual or parental respiratory disease history. In addition, latest studies have revealed novel and emerging risk factors. In this review, differential gender difference as a factor for COPD development at different territories is discussed for the first time. First, women seem to have more COPD, while more women die of COPD or have more severe COPD, in Western societies. This seems different from the impression that COPD dominants in men, which is true in Eastern societies. It might be related to higher rate of cigarette smoking in women in developed countries (i.e., 12.0% of women in United States smoke vs. 2.2% in China). Nonetheless, women in Eastern societies are exposed to more biomass usage. Second, modest elevation in PM2.5 levels at >∼21.4-32.7 μg/m3, previously considered "cleaner air," is associated with incidence of COPD, indicating that more stringent goals should be set for the reduction of PM2.5 levels to prevent COPD development. Last but not least, e-cigarette use, which has become an epidemic especially among adolescents as officially declared by the United States government, has severe adverse effects that may cause development of COPD early in life. Built upon an overview of the established risk factors for COPD primarily focusing on cigarette smoking and environmental pollutions, the present review further discusses novel concepts, mechanisms, and solutions evolved around the emerging risk factors for COPD discussed above, understanding of which would likely enable better intervention of this devastating disease.
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Affiliation(s)
- Yixuan Zhang
- Division of Molecular Medicine, Department of Anesthesiology, Division of Cardiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Lu Wang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Gökhan M. Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL, United States
| | - Hua Cai
- Division of Molecular Medicine, Department of Anesthesiology, Division of Cardiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
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16
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Wu D, Harrison DL, Szasz T, Yeh CF, Shentu TP, Meliton A, Huang RT, Zhou Z, Mutlu GM, Huang J, Fang Y. Single-cell metabolic imaging reveals a SLC2A3-dependent glycolytic burst in motile endothelial cells. Nat Metab 2021; 3:714-727. [PMID: 34031595 PMCID: PMC8362837 DOI: 10.1038/s42255-021-00390-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 04/12/2021] [Indexed: 02/04/2023]
Abstract
Single-cell motility is spatially heterogeneous and driven by metabolic energy. Directly linking cell motility to cell metabolism is technically challenging but biologically important. Here, we use single-cell metabolic imaging to measure glycolysis in individual endothelial cells with genetically encoded biosensors capable of deciphering metabolic heterogeneity at subcellular resolution. We show that cellular glycolysis fuels endothelial activation, migration and contraction and that sites of high lactate production colocalize with active cytoskeletal remodelling within an endothelial cell. Mechanistically, RhoA induces endothelial glycolysis for the phosphorylation of cofilin and myosin light chain in order to reorganize the cytoskeleton and thus control cell motility; RhoA activation triggers a glycolytic burst through the translocation of the glucose transporter SLC2A3/GLUT3 to fuel the cellular contractile machinery, as demonstrated across multiple endothelial cell types. Our data indicate that Rho-GTPase signalling coordinates energy metabolism with cytoskeleton remodelling to regulate endothelial cell motility.
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Affiliation(s)
- David Wu
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
| | - Devin L Harrison
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
- Graduate Program in Biophysical Sciences, The University of Chicago, Chicago, IL, USA
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, USA
| | - Teodora Szasz
- Research Computing Center, The University of Chicago, Chicago, IL, USA
| | - Chih-Fan Yeh
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, National Taiwan University Hospital, Taipei, Taiwan
| | - Tzu-Pin Shentu
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
| | - Angelo Meliton
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
| | - Ru-Ting Huang
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
| | - Zhengjie Zhou
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
| | - Gökhan M Mutlu
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
| | - Jun Huang
- Graduate Program in Biophysical Sciences, The University of Chicago, Chicago, IL, USA.
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, USA.
| | - Yun Fang
- Department of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA.
- Graduate Program in Biophysical Sciences, The University of Chicago, Chicago, IL, USA.
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17
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McQuattie-Pimentel AC, Ren Z, Joshi N, Watanabe S, Stoeger T, Chi M, Lu Z, Sichizya L, Aillon RP, Chen CI, Soberanes S, Chen Z, Reyfman PA, Walter JM, Anekalla KR, Davis JM, Helmin KA, Runyan CE, Abdala-Valencia H, Nam K, Meliton AY, Winter DR, Morimoto RI, Mutlu GM, Bharat A, Perlman H, Gottardi CJ, Ridge KM, Chandel NS, Sznajder JI, Balch WE, Singer BD, Misharin AV, Budinger GS. The lung microenvironment shapes a dysfunctional response of alveolar macrophages in aging. J Clin Invest 2021; 131:140299. [PMID: 33586677 PMCID: PMC7919859 DOI: 10.1172/jci140299] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 12/09/2020] [Indexed: 12/13/2022] Open
Abstract
Alveolar macrophages orchestrate the response to viral infections. Age-related changes in these cells may underlie the differential severity of pneumonia in older patients. We performed an integrated analysis of single-cell RNA-Seq data that revealed homogenous age-related changes in the alveolar macrophage transcriptome in humans and mice. Using genetic lineage tracing with sequential injury, heterochronic adoptive transfer, and parabiosis, we found that the lung microenvironment drove an age-related resistance of alveolar macrophages to proliferation that persisted during influenza A viral infection. Ligand-receptor pair analysis localized these changes to the extracellular matrix, where hyaluronan was increased in aged animals and altered the proliferative response of bone marrow-derived macrophages to granulocyte macrophage colony-stimulating factor (GM-CSF). Our findings suggest that strategies targeting the aging lung microenvironment will be necessary to restore alveolar macrophage function in aging.
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Affiliation(s)
| | - Ziyou Ren
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Nikita Joshi
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Satoshi Watanabe
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Thomas Stoeger
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois, USA
| | - Monica Chi
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Ziyan Lu
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Lango Sichizya
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Raul Piseaux Aillon
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Ching-I Chen
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Saul Soberanes
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Zhangying Chen
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Paul A. Reyfman
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - James M. Walter
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Kishore R. Anekalla
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Jennifer M. Davis
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Kathryn A. Helmin
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Constance E. Runyan
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Hiam Abdala-Valencia
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Kiwon Nam
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Angelo Y. Meliton
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, University of Chicago Hospitals, Chicago, Illinois, USA
| | - Deborah R. Winter
- Department of Medicine, Division of Rheumatology, Northwestern University, Chicago, Illinois, USA
| | - Richard I. Morimoto
- Department of Biochemistry and Molecular Genetics, Northwestern University, Evanston, Illinois, USA
| | - Gökhan M. Mutlu
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, University of Chicago Hospitals, Chicago, Illinois, USA
| | - Ankit Bharat
- Department of Surgery, Division of Thoracic Surgery, Northwestern University, Chicago, Illinois, USA
| | - Harris Perlman
- Department of Medicine, Division of Rheumatology, Northwestern University, Chicago, Illinois, USA
| | - Cara J. Gottardi
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Karen M. Ridge
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Navdeep S. Chandel
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - Jacob I. Sznajder
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - William E. Balch
- The Scripps Research Institute Department of Chemical Physiology, La Jolla, California, USA
| | - Benjamin D. Singer
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Biochemistry and Molecular Genetics, Northwestern University, Evanston, Illinois, USA
| | - Alexander V. Misharin
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
| | - G.R. Scott Budinger
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, USA
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18
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Hamanaka RB, Mutlu GM. Metabolic requirements of pulmonary fibrosis: role of fibroblast metabolism. FEBS J 2021; 288:6331-6352. [PMID: 33393204 DOI: 10.1111/febs.15693] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [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: 10/21/2020] [Revised: 12/22/2020] [Accepted: 12/31/2020] [Indexed: 12/27/2022]
Abstract
Fibrosis is a pathologic condition characterized by excessive deposition of extracellular matrix and chronic scaring that can affect every organ system. Organ fibrosis is associated with significant morbidity and mortality, contributing to as many as 45% of all deaths in the developed world. In the lung, many chronic lung diseases may lead to fibrosis, the most devastating being idiopathic pulmonary fibrosis (IPF), which affects approximately 3 million people worldwide and has a median survival of 3.8 years. Currently approved therapies for IPF do not significantly extend lifespan, and thus, there is pressing need for novel therapeutic strategies to treat IPF and other fibrotic diseases. At the heart of pulmonary fibrosis are myofibroblasts, contractile cells with characteristics of both fibroblasts and smooth muscle cells, which are the primary cell type responsible for matrix deposition in fibrotic diseases. Much work has centered around targeting the extracellular growth factors and intracellular signaling regulators of myofibroblast differentiation. Recently, metabolic changes associated with myofibroblast differentiation have come to the fore as targetable mechanisms required for myofibroblast function. In this review, we will discuss the metabolic changes associated with myofibroblast differentiation, as well as the mechanisms by which these changes promote myofibroblast function. We will then discuss the potential for this new knowledge to lead to the development of novel therapies for IPF and other fibrotic diseases.
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Affiliation(s)
- Robert B Hamanaka
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, IL, USA
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, IL, USA
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O'Leary EM, Tian Y, Nigdelioglu R, Witt LJ, Cetin-Atalay R, Meliton AY, Woods PS, Kimmig LM, Sun KA, Gökalp GA, Mutlu GM, Hamanaka RB. TGF-β Promotes Metabolic Reprogramming in Lung Fibroblasts via mTORC1-dependent ATF4 Activation. Am J Respir Cell Mol Biol 2020; 63:601-612. [PMID: 32668192 DOI: 10.1165/rcmb.2020-0143oc] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [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: 12/24/2022] Open
Abstract
Idiopathic pulmonary fibrosis is a fatal interstitial lung disease characterized by the TGF-β (transforming growth factor-β)-dependent differentiation of lung fibroblasts into myofibroblasts, which leads to excessive deposition of collagen proteins and progressive scarring. We have previously shown that synthesis of collagen by myofibroblasts requires de novo synthesis of glycine, the most abundant amino acid found in collagen protein. TGF-β upregulates the expression of the enzymes of the de novo serine-glycine synthesis pathway in lung fibroblasts; however, the transcriptional and signaling regulators of this pathway remain incompletely understood. Here, we demonstrate that TGF-β promotes accumulation of ATF4 (activating transcription factor 4), which is required for increased expression of the serine-glycine synthesis pathway enzymes in response to TGF-β. We found that induction of the integrated stress response (ISR) contributes to TGF-β-induced ATF4 activity; however, the primary driver of ATF4 downstream of TGF-β is activation of mTORC1 (mTOR Complex 1). TGF-β activates the PI3K-Akt-mTOR pathway, and inhibition of PI3K prevents activation of downstream signaling and induction of ATF4. Using a panel of mTOR inhibitors, we found that ATF4 activation is dependent on mTORC1, independent of mTORC2. Rapamycin, which incompletely and allosterically inhibits mTORC1, had no effect on TGF-β-mediated induction of ATF4; however, Rapalink-1, which specifically targets the kinase domain of mTORC1, completely inhibited ATF4 induction and metabolic reprogramming downstream of TGF-β. Our results provide insight into the mechanisms of metabolic reprogramming in myofibroblasts and clarify contradictory published findings on the role of mTOR inhibition in myofibroblast differentiation.
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Affiliation(s)
- Erin M O'Leary
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Yufeng Tian
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Recep Nigdelioglu
- Department of Pathology, Loyola University Medical Center, Maywood, Illinois; and
| | - Leah J Witt
- Division of Geriatrics and Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Department of Medicine, The University of California San Francisco, San Francisco, California
| | - Rengul Cetin-Atalay
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Angelo Y Meliton
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Parker S Woods
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Lucas M Kimmig
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Kaitlyn A Sun
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Gizem A Gökalp
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Robert B Hamanaka
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, Illinois
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Kimmig LM, Wu D, Gold M, Pettit NN, Pitrak D, Mueller J, Husain AN, Mutlu EA, Mutlu GM. IL-6 Inhibition in Critically Ill COVID-19 Patients Is Associated With Increased Secondary Infections. Front Med (Lausanne) 2020; 7:583897. [PMID: 33195334 PMCID: PMC7655919 DOI: 10.3389/fmed.2020.583897] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/17/2020] [Indexed: 12/14/2022] Open
Abstract
Background: Anti-inflammatory therapies such as IL-6 inhibition have been proposed for COVID-19 in a vacuum of evidence-based treatment. However, abrogating the inflammatory response in infectious diseases may impair a desired host response and pre-dispose to secondary infections. Methods: We retrospectively reviewed the medical record of critically ill COVID-19 patients during an 8-week span and compared the prevalence of secondary infection and outcomes in patients who did and did not receive tocilizumab. Additionally, we included representative histopathologic post-mortem findings from several COVID-19 cases that underwent autopsy at our institution. Results: One hundred eleven patients were identified, of which 54 had received tocilizumab while 57 had not. Receiving tocilizumab was associated with a higher risk of secondary bacterial (48.1 vs. 28.1%; p = 0.029 and fungal (5.6 vs. 0%; p = 0.112) infections. Consistent with higher number of infections, patients who received tocilizumab had higher mortality (35.2 vs. 19.3%; p = 0.020). Seven cases underwent autopsy. In three cases who received tocilizumab, there was evidence of pneumonia on pathology. Of the four cases that had not been given tocilizumab, two showed evidence of aspiration pneumonia and two exhibited diffuse alveolar damage. Conclusions: Experimental therapies are currently being applied to COVID-19 outside of clinical trials. Anti-inflammatory therapies such as anti-IL-6 therapy have the potential to impair viral clearance, pre-dispose to secondary infection, and cause harm. We seek to raise physician awareness of these issues and highlight the need to better understand the immune response in COVID-19.
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Affiliation(s)
- Lucas M. Kimmig
- Department of Medicine, University of Chicago, Chicago, IL, United States
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
| | - David Wu
- Department of Medicine, University of Chicago, Chicago, IL, United States
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
| | - Matthew Gold
- Department of Medicine, University of Chicago, Chicago, IL, United States
| | - Natasha N. Pettit
- Department of Medicine, University of Chicago, Chicago, IL, United States
- Section of Infectious Diseases, University of Chicago, Chicago, IL, United States
| | - David Pitrak
- Department of Medicine, University of Chicago, Chicago, IL, United States
- Section of Infectious Diseases, University of Chicago, Chicago, IL, United States
| | - Jeffrey Mueller
- Department of Pathology, University of Chicago, Chicago, IL, United States
| | - Aliya N. Husain
- Department of Pathology, University of Chicago, Chicago, IL, United States
| | - Ece A. Mutlu
- Section of Gastroenterology and Hepatology, Rush University, Chicago, IL, United States
| | - Gökhan M. Mutlu
- Department of Medicine, University of Chicago, Chicago, IL, United States
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, United States
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21
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Pettit NN, Nguyen CT, Mutlu GM, Wu D, Kimmig L, Pitrak D, Pursell K. Late onset infectious complications and safety of tocilizumab in the management of COVID-19. J Med Virol 2020; 93:1459-1464. [PMID: 32790075 PMCID: PMC7436682 DOI: 10.1002/jmv.26429] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [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: 06/30/2020] [Accepted: 08/10/2020] [Indexed: 01/08/2023]
Abstract
Background Tocilizumab (TCZ) has been used in the management of COVID‐19‐related cytokine release syndrome (CRS). Concerns exist regarding the risk of infections and drug‐related toxicities. We sought to evaluate the incidence of these TCZ complications among COVID‐19 patients. Methods All adult inpatients with COVID‐19 between 1 March and 25 April 2020 that received TCZ were included. We compared the rate of late‐onset infections (>48 hours following admission) to a control group matched according to intensive care unit admission and mechanical ventilation requirement. Post‐TCZ toxicities evaluated included: elevated liver function tests (LFTs), GI perforation, diverticulitis, neutropenia, hypertension, allergic reactions, and infusion‐related reactions. Results Seventy‐four patients were included in each group. Seventeen infections in the TCZ group (23%) and 6 (8%) infections in the control group occurred >48 hours after admission (P = .013). Most infections were bacterial with pneumonia being the most common manifestation. Among patients receiving TCZ, LFT elevations were observed in 51%, neutropenia in 1.4%, and hypertension in 8%. The mortality rate among those that received TCZ was greater than the control (39% versus 23%, P = .03). Conclusion Late onset infections were significantly more common among those receiving TCZ. Combining infections and TCZ‐related toxicities, 61% of patients had a possible post‐TCZ complication. While awaiting clinical trial results to establish the efficacy of TCZ for COVID‐19 related CRS, the potential for infections and TCZ related toxicities should be carefully weighed when considering use. Infectious complications and drug‐related toxicities are concerns associated with TCZ use. Among COVID‐19 patients presenting with a hyper‐inflammatory response receiving TCZ, 61% had a possible post‐TCZ complication. Additional studies are needed to further evaluate the safety and efficacy of TCZ in the management of patients with COVID‐19.
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Affiliation(s)
- Natasha N Pettit
- Department of Pharmacy, University of Chicago Medicine, Chicago, Illinois
| | - Cynthia T Nguyen
- Department of Pharmacy, University of Chicago Medicine, Chicago, Illinois
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago Medicine, Chicago, Illinois
| | - David Wu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago Medicine, Chicago, Illinois
| | - Lucas Kimmig
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago Medicine, Chicago, Illinois
| | - David Pitrak
- Department of Medicine, Section of Infectious Diseases and Global Health, University of Chicago Medicine, Chicago, Illinois
| | - Kenneth Pursell
- Department of Medicine, Section of Infectious Diseases and Global Health, University of Chicago Medicine, Chicago, Illinois
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Dorry SJ, Ansbro BO, Ornitz DM, Mutlu GM, Guzy RD. FGFR2 Is Required for AEC2 Homeostasis and Survival after Bleomycin-induced Lung Injury. Am J Respir Cell Mol Biol 2020; 62:608-621. [PMID: 31860803 DOI: 10.1165/rcmb.2019-0079oc] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Alveolar epithelial cell (AEC) injury is central to the pathogenesis of pulmonary fibrosis. Epithelial FGF (fibroblast growth factor) signaling is essential for recovery from hyperoxia- and influenza-induced lung injury, and treatment with FGFs is protective in experimental lung injury. The cell types involved in the protective effect of FGFs are not known. We hypothesized that FGF signaling in type II AECs (AEC2s) is critical in bleomycin-induced lung injury and fibrosis. To test this hypothesis, we generated mice with tamoxifen-inducible deletion of FGFR1-3 (fibroblast growth factor receptors 1, 2, and 3) in surfactant protein C-positive (SPC+) AEC2s (SPC triple conditional knockout [SPC-TCKO]). In the absence of injury, SPC-TCKO mice had fewer AEC2s, decreased Sftpc (surfactant protein C gene) expression, increased alveolar diameter, and increased collagen deposition. After intratracheal bleomycin administration, SPC-TCKO mice had increased mortality, lung edema, and BAL total protein, and flow cytometry and immunofluorescence revealed a loss of AEC2s. To reduce mortality of SPC-TCKO mice to less than 50%, a 25-fold dose reduction of bleomycin was required. Surviving bleomycin-injured SPC-TCKO mice had increased collagen deposition, fibrosis, and ACTA2 expression and decreased epithelial gene expression. Inducible inactivation of individual Fgfr2 or Fgfr3 revealed that Fgfr2, but not Fgfr3, was responsible for the increased mortality and lung injury after bleomycin administration. In conclusion, AEC2-specific FGFR2 is critical for survival in response to bleomycin-induced lung injury. These data also suggest that a population of SPC+ AEC2s require FGFR2 signaling for maintenance in the adult lung. Preventing epithelial FGFR inhibition and/or activating FGFRs in alveolar epithelium may therefore represent a novel approach to treating lung injury and reducing fibrosis.
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Affiliation(s)
- Samuel J Dorry
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Brandon O Ansbro
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - David M Ornitz
- Department of Developmental Biology, Washington University in St. Louis, St. Louis, Missouri
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Robert D Guzy
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
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23
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Abasıyanık MF, Wolfe K, Van Phan H, Lin J, Laxman B, White SR, Verhoef PA, Mutlu GM, Patel B, Tay S. Ultrasensitive digital quantification of cytokines and bacteria predicts septic shock outcomes. Nat Commun 2020; 11:2607. [PMID: 32451375 PMCID: PMC7248118 DOI: 10.1038/s41467-020-16124-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 04/13/2020] [Indexed: 12/29/2022] Open
Abstract
Quantification of pathogen and host biomarkers is essential for the diagnosis, monitoring, and treatment of infectious diseases. Here, we demonstrate sensitive and rapid quantification of bacterial load and cytokines from human biological samples to generate actionable hypotheses. Our digital assay measures IL-6 and TNF-α proteins, gram-negative (GN) and gram-positive (GP) bacterial DNA, and the antibiotic-resistance gene blaTEM with femtomolar sensitivity. We use our method to characterize bronchoalveolar lavage fluid from patients with asthma, and find elevated GN bacteria and IL-6 levels compared to healthy subjects. We then analyze plasma from patients with septic shock and find that increasing levels of IL-6 and blaTEM are associated with mortality, while decreasing IL-6 levels are associated with recovery. Surprisingly, lower GN bacteria levels are associated with higher probability of death. Applying decision-tree analysis to our measurements, we are able to predict mortality and rate of recovery from septic shock with over 90% accuracy. Ultrasensitive methods for detection of biomarkers for infectious disease are needed for diagnosing, monitoring and targeting treatment. Here the authors develop a digital assay for inflammatory markers, bacterial DNA and antibotic-resistance genes and apply it to characterise asthma patients and predict mortality from septic shock.
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Affiliation(s)
- M Fatih Abasıyanık
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.,Institute for Genomics and Systems Biology, The University of Chicago, Chicago, IL, 60637, USA
| | - Krysta Wolfe
- Department of Medicine, Section of Pulmonary/Critical Care, The University of Chicago, Chicago, IL, 60637, USA
| | - Hoang Van Phan
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.,Institute for Genomics and Systems Biology, The University of Chicago, Chicago, IL, 60637, USA
| | - Jing Lin
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA.,Institute for Genomics and Systems Biology, The University of Chicago, Chicago, IL, 60637, USA
| | - Bharathi Laxman
- Department of Medicine, Section of Pulmonary/Critical Care, The University of Chicago, Chicago, IL, 60637, USA
| | - Steven R White
- Department of Medicine, Section of Pulmonary/Critical Care, The University of Chicago, Chicago, IL, 60637, USA
| | - Philip A Verhoef
- Department of Medicine, Section of Pulmonary/Critical Care, The University of Chicago, Chicago, IL, 60637, USA.,Center for Integrated Health Research, Kaiser Permanente Hawaii, Honolulu, HI, 96819, USA
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary/Critical Care, The University of Chicago, Chicago, IL, 60637, USA
| | - Bhakti Patel
- Department of Medicine, Section of Pulmonary/Critical Care, The University of Chicago, Chicago, IL, 60637, USA.
| | - Savaş Tay
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL, 60637, USA. .,Institute for Genomics and Systems Biology, The University of Chicago, Chicago, IL, 60637, USA.
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Hamanaka RB, O'Leary EM, Witt LJ, Tian Y, Gökalp GA, Meliton AY, Dulin NO, Mutlu GM. Glutamine Metabolism Is Required for Collagen Protein Synthesis in Lung Fibroblasts. Am J Respir Cell Mol Biol 2020; 61:597-606. [PMID: 30973753 DOI: 10.1165/rcmb.2019-0008oc] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [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: 12/16/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is characterized by the transforming growth factor (TGF)-β-dependent differentiation of lung fibroblasts into myofibroblasts, leading to excessive deposition of extracellular matrix proteins, which distort lung architecture and function. Metabolic reprogramming in myofibroblasts is emerging as an important mechanism in the pathogenesis of IPF, and recent evidence suggests that glutamine metabolism is required in myofibroblasts, although the exact role of glutamine in myofibroblasts is unclear. In the present study, we demonstrate that glutamine and its conversion to glutamate by glutaminase are required for TGF-β-induced collagen protein production in lung fibroblasts. We found that metabolism of glutamate to α-ketoglutarate by glutamate dehydrogenase or the glutamate-pyruvate or glutamate-oxaloacetate transaminases is not required for collagen protein production. Instead, we discovered that the glutamate-consuming enzymes phosphoserine aminotransferase 1 (PSAT1) and aldehyde dehydrogenase 18A1 (ALDH18A1)/Δ1-pyrroline-5-carboxylate synthetase (P5CS) are required for collagen protein production by lung fibroblasts. PSAT1 is required for de novo glycine production, whereas ALDH18A1/P5CS is required for de novo proline production. Consistent with this, we found that TGF-β treatment increased cellular concentrations of glycine and proline in lung fibroblasts. Our results suggest that glutamine metabolism is required to promote amino acid biosynthesis and not to provide intermediates such as α-ketoglutarate for oxidation in mitochondria. In support of this, we found that inhibition of glutaminolysis has no effect on cellular oxygen consumption and that knockdown of oxoglutarate dehydrogenase has no effect on the ability of fibroblasts to produce collagen protein. Our results suggest that amino acid biosynthesis pathways may represent novel therapeutic targets for treatment of fibrotic diseases, including IPF.
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Affiliation(s)
- Robert B Hamanaka
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Erin M O'Leary
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Leah J Witt
- Division of Geriatrics and.,Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, Department of Medicine, University of California-San Francisco, San Francisco, California
| | - Yufeng Tian
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Gizem A Gökalp
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Angelo Y Meliton
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Nickolai O Dulin
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
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25
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Affiliation(s)
| | - Gökhan M Mutlu
- Department of MedicineThe University of ChicagoChicago, Illinois
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26
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Sun KA, Li Y, Meliton AY, Woods PS, Kimmig LM, Cetin-Atalay R, Hamanaka RB, Mutlu GM. Endogenous itaconate is not required for particulate matter-induced NRF2 expression or inflammatory response. eLife 2020; 9:54877. [PMID: 32255424 PMCID: PMC7185992 DOI: 10.7554/elife.54877] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [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: 01/04/2020] [Accepted: 04/03/2020] [Indexed: 12/27/2022] Open
Abstract
Particulate matter (PM) air pollution causes cardiopulmonary mortality via macrophage-driven lung inflammation; however, the mechanisms are incompletely understood. RNA-sequencing demonstrated Acod1 (Aconitate decarboxylase 1) as one of the top genes induced by PM in macrophages. Acod1 encodes a mitochondrial enzyme that produces itaconate, which has been shown to exert anti-inflammatory effects via NRF2 after LPS. Here, we demonstrate that PM induces Acod1 and itaconate, which reduced mitochondrial respiration via complex II inhibition. Using Acod1-/- mice, we found that Acod1/endogenous itaconate does not affect PM-induced inflammation or NRF2 activation in macrophages in vitro or in vivo. In contrast, exogenous cell permeable itaconate, 4-octyl itaconate (OI) attenuated PM-induced inflammation in macrophages. OI was sufficient to activate NRF2 in macrophages; however, NRF2 was not required for the anti-inflammatory effects of OI. We conclude that the effects of itaconate production on inflammation are stimulus-dependent, and that there are important differences between endogenous and exogenously-applied itaconate.
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Affiliation(s)
- Kaitlyn A Sun
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Yan Li
- Center for Research Bioinformatics, The University of Chicago, Chicago, United States
| | - Angelo Y Meliton
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Parker S Woods
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Lucas M Kimmig
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Rengül Cetin-Atalay
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Robert B Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
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Piao L, Fang YH, Hamanaka RB, Mutlu GM, Dezfulian C, Archer SL, Sharp WW. Suppression of Superoxide-Hydrogen Peroxide Production at Site IQ of Mitochondrial Complex I Attenuates Myocardial Stunning and Improves Postcardiac Arrest Outcomes. Crit Care Med 2020; 48:e133-e140. [PMID: 31939812 PMCID: PMC6964871 DOI: 10.1097/ccm.0000000000004095] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVES Cardiogenic shock following cardiopulmonary resuscitation for sudden cardiac arrest is common, occurring even in the absence of acute coronary artery occlusion, and contributes to high rates of postcardiopulmonary resuscitation mortality. The pathophysiology of this shock is unclear, and effective therapies for improving clinical outcomes are lacking. DESIGN Laboratory investigation. SETTING University laboratory. SUBJECTS C57BL/6 adult female mice. INTERVENTIONS Anesthetized and ventilated adult female C57BL/6 wild-type mice underwent a 4, 8, 12, or 16-minute potassium chloride-induced cardiac arrest followed by 90 seconds of cardiopulmonary resuscitation. Mice were then blindly randomized to a single IV injection of vehicle (phosphate-buffered saline) or suppressor of site IQ electron leak, an inhibitor of superoxide production by complex I of the mitochondrial electron transport chain. Suppressor of site IQ electron leak and vehicle were administered during cardiopulmonary resuscitation. MEASUREMENTS AND MAIN RESULTS Using a murine model of asystolic cardiac arrest, we discovered that duration of cardiac arrest prior to cardiopulmonary resuscitation determined postresuscitation success rates, degree of neurologic injury, and severity of myocardial dysfunction. Post-cardiopulmonary resuscitation cardiac dysfunction was not associated with myocardial necrosis, apoptosis, inflammation, or mitochondrial permeability transition pore opening. Furthermore, left ventricular function recovered within 72 hours of cardiopulmonary resuscitation, indicative of myocardial stunning. Postcardiopulmonary resuscitation, the myocardium exhibited increased reactive oxygen species and evidence of mitochondrial injury, specifically reperfusion-induced reactive oxygen species generation at electron transport chain complex I. Suppressor of site IQ electron leak, which inhibits complex I-dependent reactive oxygen species generation by suppression of site IQ electron leak, decreased myocardial reactive oxygen species generation and improved postcardiopulmonary resuscitation myocardial function, neurologic outcomes, and survival. CONCLUSIONS The severity of cardiogenic shock following asystolic cardiac arrest is dependent on the length of cardiac arrest prior to cardiopulmonary resuscitation and is mediated by myocardial stunning resulting from mitochondrial electron transport chain complex I dysfunction. A novel pharmacologic agent targeting this mechanism, suppressor of site IQ electron leak, represents a potential, practical therapy for improving sudden cardiac arrest resuscitation outcomes.
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Affiliation(s)
- Lin Piao
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, IL
| | - Yong-Hu Fang
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, IL
| | - Robert B Hamanaka
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL
| | - Cameron Dezfulian
- Safar Center for Resuscitation Research, Critical Care Medicine Department, University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - Stephen L Archer
- Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Willard W Sharp
- Section of Emergency Medicine, Department of Medicine, University of Chicago, Chicago, IL
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28
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Woods PS, Kimmig LM, Meliton AY, Sun KA, Tian Y, O’Leary EM, Gökalp GA, Hamanaka RB, Mutlu GM. Tissue-Resident Alveolar Macrophages Do Not Rely on Glycolysis for LPS-induced Inflammation. Am J Respir Cell Mol Biol 2020; 62:243-255. [PMID: 31469581 PMCID: PMC6993551 DOI: 10.1165/rcmb.2019-0244oc] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 08/29/2019] [Indexed: 01/03/2023] Open
Abstract
Macrophage effector function is dynamic in nature and largely dependent on not only the type of immunological challenge but also the tissue-specific environment and developmental origin of a given macrophage population. Recent research has highlighted the importance of glycolytic metabolism in the regulation of effector function as a common feature associated with macrophage activation. Yet, most research has used macrophage cell lines and bone marrow-derived macrophages, which do not account for the diversity of macrophage populations and the role of tissue specificity in macrophage immunometabolism. Tissue-resident alveolar macrophages (TR-AMs) reside in an environment characterized by remarkably low glucose concentrations, making glycolysis-linked immunometabolism an inefficient and unlikely means of immune activation. In this study, we show that TR-AMs rely on oxidative phosphorylation to meet their energy demands and maintain extremely low levels of glycolysis under steady-state conditions. Unlike bone marrow-derived macrophages, TR-AMs did not experience enhanced glycolysis in response to LPS, and glycolytic inhibition had no effect on their proinflammatory cytokine production. Hypoxia-inducible factor 1α stabilization promoted glycolysis in TR-AMs and shifted energy production away from oxidative metabolism at baseline, but it was not sufficient for TR-AMs to mount further increases in glycolysis or enhance immune function in response to LPS. Importantly, we confirmed these findings in an in vivo influenza model in which infiltrating macrophages had significantly higher glycolytic and proinflammatory gene expression than TR-AMs. These findings demonstrate that glycolysis is dispensable for macrophage effector function in TR-AM and highlight the importance of macrophage tissue origin (tissue resident vs. recruited) in immunometabolism.
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Affiliation(s)
- Parker S. Woods
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Lucas M. Kimmig
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Angelo Y. Meliton
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Kaitlyn A. Sun
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Yufeng Tian
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Erin M. O’Leary
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Gizem A. Gökalp
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Robert B. Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
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Ard S, Reed EB, Smolyaninova LV, Orlov SN, Mutlu GM, Guzy RD, Dulin NO. Sustained Smad2 Phosphorylation Is Required for Myofibroblast Transformation in Response to TGF-β. Am J Respir Cell Mol Biol 2019; 60:367-369. [PMID: 30821500 DOI: 10.1165/rcmb.2018-0252le] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Shawn Ard
- 1 University of Chicago Chicago, Illinois
| | | | | | - Sergei N Orlov
- 2 Lomonosov Moscow State University Moscow, Russian Federation and.,3 Siberian Medical State University Tomsk, Russian Federation
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30
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Affiliation(s)
- Robert B Hamanaka
- 1 Section of Pulmonary and Critical Care Medicine University of Chicago Chicago, Illinois
| | - Gökhan M Mutlu
- 1 Section of Pulmonary and Critical Care Medicine University of Chicago Chicago, Illinois
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31
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Piao L, Fang Y, Hamanaka RB, Mutlu GM, Dezfulian C, Archer SL, Sharp WW. Abstract 282: Mitochondrial Complex I Induced Myocardial Stunning Following Cardiopulmonary Resuscitation. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Cardiogenic shock following cardiopulmonary resuscitation (CPR) for sudden cardiac arrest is common, occurring even in the absence of acute coronary artery occlusion, and contributes to high rates of post-CPR mortality. The pathophysiology of this shock is unclear and effective therapies for improving clinical outcomes are lacking.
Methods and Results:
Using a murine model of asystolic cardiac arrest, we investigated the pathophysiology of post-CPR cardiogenic shock and discovered that duration of cardiac arrest (4, 8, 12 or 16-minute) prior to CPR determined post-resuscitation success rates, degree of neurological injury, and severity of myocardial dysfunction. Post-CPR cardiac dysfunction was not associated with myocardial necrosis, apoptosis, inflammation, or mitochondrial permeability transition pore opening and recovered within several days, indicative of myocardial stunning. Post-CPR myocardial stunning was associated with increases in ventricular and mitochondrial reactive oxygen species (ROS,
P
<0.001 vs Sham, respectively). Seahorse micropolarimetry of isolated post-CPR cardiac mitochondria revealed decreased rates of maximal oxygen consumption rates (OCR) for both Complex I and Complex II vs controls (
P
<0.01 vs Sham, respectively), indicating inhibition of mitochondrial oxidative phosphorylation. Paradoxically, in the presence of ADP stimulated coupled respiration, post-CRP mitochondria demonstrated increased OCR (
P
<0.05 vs Sham) and increased rates of proton leak (
P
<0.05 vs Sham), suggesting Complex I as the site of ROS generation. These findings were not observed at complex II. S1QEL, a complex I-specific superoxide inhibitor, administered during CPR, decreased myocardial ROS generation while improving post-CPR myocardial function (
P
<0.01 vs CPR control), neurological injury (
P
<0.01 vs CPR control), and survival (
P
<0.01 vs CPR control).
Conclusions:
Our results demonstrate that cardiogenic shock following resuscitation from cardiac arrest is consistent with myocardial stunning mediated by mitochondrial complex I injury and ROS generation. Targeting this mechanism represents a novel and practical therapy for improving sudden cardiac arrest resuscitation outcomes.
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32
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Reed EB, Ard S, La J, Park CY, Culligan L, Fredberg JJ, Smolyaninova LV, Orlov SN, Chen B, Guzy R, Mutlu GM, Dulin NO. Anti-fibrotic effects of tannic acid through regulation of a sustained TGF-beta receptor signaling. Respir Res 2019; 20:168. [PMID: 31358001 PMCID: PMC6664561 DOI: 10.1186/s12931-019-1141-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 03/26/2019] [Accepted: 07/22/2019] [Indexed: 12/23/2022] Open
Abstract
Background Pulmonary fibrosis is a progressive disease characterized by structural distortion of the lungs. Transforming growth factor-beta (TGF-beta) is a key cytokine implicated in the pathogenesis of pulmonary fibrosis. TGF-beta-induced myofibroblast differentiation characterized by expression of smooth muscle alpha-actin and extracellular matrix proteins is a key process in pathogenesis of fibrotic disease. Tannic acid is a natural polyphenol with diverse applications. In this study, we investigated the effect of tannic acid on myofibroblast differentiation and pulmonary fibrosis in cultured cells and in bleomycin model of the disease. Methods Primary cultured human lung fibroblasts (HLF) were used. The relative levels of proteins were determined by Western blotting. HLF contraction was measured by traction microscopy. Bleomycin-induced pulmonary fibrosis in mice was used as the disease model. Results Tannic acid inhibited TGF-beta-induced expression of collagen-1 and smooth muscle alpha-actin (SMA) as well as force generation by HLF. Tannic acid did not affect initial phosphorylation of Smad2 in response to TGF-beta, but significantly inhibited sustained Smad2 phosphorylation, which we recently described to be critical for TGF-beta-induced myofibroblast differentiation. Accordingly, tannic acid inhibited Smad-dependent gene transcription in response to TGF-beta, as assessed using luciferase reporter for the activity of Smad-binding elements. Finally, in mouse model of bleomycin-induced pulmonary fibrosis, therapeutic application of tannic acid resulted in a significant reduction of lung fibrosis, decrease in collagen-1 content and of Smad2 phosphorylation in the lungs. Conclusions This study demonstrates the anti-fibrotic effect of tannic acid in vitro and in vivo through a regulation of sustained Smad2 phosphorylation. Electronic supplementary material The online version of this article (10.1186/s12931-019-1141-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Eleanor B Reed
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, 5841 S. Maryland Ave, MC6076, Chicago, IL, 60637, USA
| | - Shawn Ard
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, 5841 S. Maryland Ave, MC6076, Chicago, IL, 60637, USA
| | - Jennifer La
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, 5841 S. Maryland Ave, MC6076, Chicago, IL, 60637, USA
| | - Chan Young Park
- Molecular and Integrative Physiological Sciences, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Laura Culligan
- Molecular and Integrative Physiological Sciences, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Jeffrey J Fredberg
- Molecular and Integrative Physiological Sciences, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Larisa V Smolyaninova
- Laboratory of Biomembranes, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Sergei N Orlov
- Laboratory of Biomembranes, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation.,Siberian Medical State University, Tomsk, Russian Federation
| | - Bohao Chen
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, 5841 S. Maryland Ave, MC6076, Chicago, IL, 60637, USA
| | - Robert Guzy
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, 5841 S. Maryland Ave, MC6076, Chicago, IL, 60637, USA
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, 5841 S. Maryland Ave, MC6076, Chicago, IL, 60637, USA
| | - Nickolai O Dulin
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, 5841 S. Maryland Ave, MC6076, Chicago, IL, 60637, USA.
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33
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Labaki WW, Kimmig LM, Mutlu GM, Han MK, Bhatt SP. Update in Chronic Obstructive Pulmonary Disease 2018. Am J Respir Crit Care Med 2019; 199:1462-1470. [PMID: 30958976 PMCID: PMC6835078 DOI: 10.1164/rccm.201902-0374up] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/04/2019] [Indexed: 12/21/2022] Open
Affiliation(s)
- Wassim W. Labaki
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan
| | - Lucas M. Kimmig
- Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois; and
| | - Gökhan M. Mutlu
- Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois; and
| | - MeiLan K. Han
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan
| | - Surya P. Bhatt
- Division of Pulmonary, Allergy, and Critical Care Medicine, The University of Alabama at Birmingham, Birmingham, Alabama
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34
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Reyfman PA, Walter JM, Joshi N, Anekalla KR, McQuattie-Pimentel AC, Chiu S, Fernandez R, Akbarpour M, Chen CI, Ren Z, Verma R, Abdala-Valencia H, Nam K, Chi M, Han S, Gonzalez-Gonzalez FJ, Soberanes S, Watanabe S, Williams KJN, Flozak AS, Nicholson TT, Morgan VK, Winter DR, Hinchcliff M, Hrusch CL, Guzy RD, Bonham CA, Sperling AI, Bag R, Hamanaka RB, Mutlu GM, Yeldandi AV, Marshall SA, Shilatifard A, Amaral LAN, Perlman H, Sznajder JI, Argento AC, Gillespie CT, Dematte J, Jain M, Singer BD, Ridge KM, Lam AP, Bharat A, Bhorade SM, Gottardi CJ, Budinger GRS, Misharin AV. Single-Cell Transcriptomic Analysis of Human Lung Provides Insights into the Pathobiology of Pulmonary Fibrosis. Am J Respir Crit Care Med 2019; 199:1517-1536. [PMID: 30554520 PMCID: PMC6580683 DOI: 10.1164/rccm.201712-2410oc] [Citation(s) in RCA: 698] [Impact Index Per Article: 139.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 12/14/2019] [Indexed: 11/30/2022] Open
Abstract
Rationale: The contributions of diverse cell populations in the human lung to pulmonary fibrosis pathogenesis are poorly understood. Single-cell RNA sequencing can reveal changes within individual cell populations during pulmonary fibrosis that are important for disease pathogenesis. Objectives: To determine whether single-cell RNA sequencing can reveal disease-related heterogeneity within alveolar macrophages, epithelial cells, or other cell types in lung tissue from subjects with pulmonary fibrosis compared with control subjects. Methods: We performed single-cell RNA sequencing on lung tissue obtained from eight transplant donors and eight recipients with pulmonary fibrosis and on one bronchoscopic cryobiospy sample from a patient with idiopathic pulmonary fibrosis. We validated these data using in situ RNA hybridization, immunohistochemistry, and bulk RNA-sequencing on flow-sorted cells from 22 additional subjects. Measurements and Main Results: We identified a distinct, novel population of profibrotic alveolar macrophages exclusively in patients with fibrosis. Within epithelial cells, the expression of genes involved in Wnt secretion and response was restricted to nonoverlapping cells. We identified rare cell populations including airway stem cells and senescent cells emerging during pulmonary fibrosis. We developed a web-based tool to explore these data. Conclusions: We generated a single-cell atlas of pulmonary fibrosis. Using this atlas, we demonstrated heterogeneity within alveolar macrophages and epithelial cells from subjects with pulmonary fibrosis. These results support the feasibility of discovery-based approaches using next-generation sequencing technologies to identify signaling pathways for targeting in the development of personalized therapies for patients with pulmonary fibrosis.
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Affiliation(s)
- Paul A. Reyfman
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - James M. Walter
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Nikita Joshi
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | | | | | - Stephen Chiu
- Division of Thoracic Surgery, Department of Surgery
| | | | | | - Ching-I Chen
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Ziyou Ren
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Rohan Verma
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | | | - Kiwon Nam
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Monica Chi
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - SeungHye Han
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | | | - Saul Soberanes
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Satoshi Watanabe
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | | | - Annette S. Flozak
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | | | | | | | | | - Cara L. Hrusch
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois; and
| | - Robert D. Guzy
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois; and
| | - Catherine A. Bonham
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois; and
| | - Anne I. Sperling
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois; and
| | - Remzi Bag
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois; and
| | - Robert B. Hamanaka
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois; and
| | - Gökhan M. Mutlu
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, Illinois; and
| | | | - Stacy A. Marshall
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Ali Shilatifard
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Luis A. N. Amaral
- Department of Chemical and Biological Engineering, Weinberg College of Arts and Sciences, Northwestern University, Evanston, Illinois
| | | | - Jacob I. Sznajder
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - A. Christine Argento
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
- Division of Thoracic Surgery, Department of Surgery
| | - Colin T. Gillespie
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
- Division of Thoracic Surgery, Department of Surgery
| | - Jane Dematte
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Manu Jain
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Benjamin D. Singer
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Karen M. Ridge
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Anna P. Lam
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Ankit Bharat
- Division of Thoracic Surgery, Department of Surgery
| | | | - Cara J. Gottardi
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
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35
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Wu D, Hamanaka RB, Fang Y, Mutlu GM. Letter by Wu et al Regarding Article, "Mechanical Activation of Hypoxia-Inducible Factor 1α Drives Endothelial Dysfunction at Atheroprone Sites". Arterioscler Thromb Vasc Biol 2019; 37:e197-e198. [PMID: 29162600 DOI: 10.1161/atvbaha.117.310335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- David Wu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, IL
| | - Robert B Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, IL
| | - Yun Fang
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, IL
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, IL
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36
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Wu D, Woods PS, Duong HT, Mutlu GM. Role of Cellular Metabolism in Pulmonary Diseases. Am J Respir Cell Mol Biol 2019; 59:127-129. [PMID: 29634283 DOI: 10.1165/rcmb.2018-0103ro] [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: 11/24/2022] Open
Affiliation(s)
- David Wu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Parker S Woods
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Heng T Duong
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, Illinois
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37
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Mutlu GM, Budinger GRS. Letter by Mutlu and Budinger Regarding Article, "Particulate Matter Exposure and Stress Hormone Levels: A Randomized, Double-Blind, Crossover Trial of Air Purification". Circulation 2019. [PMID: 29530899 DOI: 10.1161/circulationaha.117.031206] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Gökhan M Mutlu
- Pulmonary and Critical Care Medicine, University of Chicago, IL (G.M.M.)
| | - G R Scott Budinger
- Pulmonary and Critical Care Medicine, Northwestern University, Chicago, IL (G.R.S.B.)
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38
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Soberanes S, Misharin AV, Jairaman A, Morales-Nebreda L, McQuattie-Pimentel AC, Cho T, Hamanaka RB, Meliton AY, Reyfman PA, Walter JM, Chen CI, Chi M, Chiu S, Gonzalez-Gonzalez FJ, Antalek M, Abdala-Valencia H, Chiarella SE, Sun KA, Woods PS, Ghio AJ, Jain M, Perlman H, Ridge KM, Morimoto RI, Sznajder JI, Balch WE, Bhorade SM, Bharat A, Prakriya M, Chandel NS, Mutlu GM, Budinger GS. Metformin Targets Mitochondrial Electron Transport to Reduce Air-Pollution-Induced Thrombosis. Cell Metab 2019; 29:503. [PMID: 30726761 PMCID: PMC6377562 DOI: 10.1016/j.cmet.2018.12.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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39
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Soberanes S, Misharin AV, Jairaman A, Morales-Nebreda L, McQuattie-Pimentel AC, Cho T, Hamanaka RB, Meliton AY, Reyfman PA, Walter JM, Chen CI, Chi M, Chiu S, Gonzalez-Gonzalez FJ, Antalek M, Abdala-Valencia H, Chiarella SE, Sun KA, Woods PS, Ghio AJ, Jain M, Perlman H, Ridge KM, Morimoto RI, Sznajder JI, Balch WE, Bhorade SM, Bharat A, Prakriya M, Chandel NS, Mutlu GM, Budinger GRS. Metformin Targets Mitochondrial Electron Transport to Reduce Air-Pollution-Induced Thrombosis. Cell Metab 2019; 29:335-347.e5. [PMID: 30318339 PMCID: PMC6365216 DOI: 10.1016/j.cmet.2018.09.019] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 07/11/2018] [Accepted: 09/17/2018] [Indexed: 12/28/2022]
Abstract
Urban particulate matter air pollution induces the release of pro-inflammatory cytokines including interleukin-6 (IL-6) from alveolar macrophages, resulting in an increase in thrombosis. Here, we report that metformin provides protection in this murine model. Treatment of mice with metformin or exposure of murine or human alveolar macrophages to metformin prevented the particulate matter-induced generation of complex III mitochondrial reactive oxygen species, which were necessary for the opening of calcium release-activated channels (CRAC) and release of IL-6. Targeted genetic deletion of electron transport or CRAC channels in alveolar macrophages in mice prevented particulate matter-induced acceleration of arterial thrombosis. These findings suggest metformin as a potential therapy to prevent some of the premature deaths attributable to air pollution exposure worldwide.
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Affiliation(s)
- Saul Soberanes
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Alexander V Misharin
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Amit Jairaman
- Department of Pharmacology, Northwestern University, Chicago, IL 60611, USA
| | - Luisa Morales-Nebreda
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Alexandra C McQuattie-Pimentel
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Takugo Cho
- Department of Medicine, University of Chicago, 5841 S Maryland Avenue, MC6026, Chicago, IL 60637, USA
| | - Robert B Hamanaka
- Department of Medicine, University of Chicago, 5841 S Maryland Avenue, MC6026, Chicago, IL 60637, USA
| | - Angelo Y Meliton
- Department of Medicine, University of Chicago, 5841 S Maryland Avenue, MC6026, Chicago, IL 60637, USA
| | - Paul A Reyfman
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - James M Walter
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Ching-I Chen
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Monica Chi
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Stephen Chiu
- Department of Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Francisco J Gonzalez-Gonzalez
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Matthew Antalek
- Rice Institute for Biomedical Research, Department of Molecular Biosciences, Northwestern University, Evanston, IL 60201, USA
| | - Hiam Abdala-Valencia
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Sergio E Chiarella
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Kaitlyn A Sun
- Department of Medicine, University of Chicago, 5841 S Maryland Avenue, MC6026, Chicago, IL 60637, USA
| | - Parker S Woods
- Department of Medicine, University of Chicago, 5841 S Maryland Avenue, MC6026, Chicago, IL 60637, USA
| | - Andrew J Ghio
- United States Environmental Protections Agency, Chapel Hill, NC 27599, USA
| | - Manu Jain
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Harris Perlman
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Karen M Ridge
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Richard I Morimoto
- Rice Institute for Biomedical Research, Department of Molecular Biosciences, Northwestern University, Evanston, IL 60201, USA
| | - Jacob I Sznajder
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - William E Balch
- Scripps Research, Department of Molecular Medicine, La Jolla, CA 92037, USA
| | - Sangeeta M Bhorade
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Ankit Bharat
- Department of Surgery, Northwestern University, Chicago, IL 60611, USA
| | - Murali Prakriya
- Department of Pharmacology, Northwestern University, Chicago, IL 60611, USA
| | - Navdeep S Chandel
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA
| | - Gökhan M Mutlu
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA; Department of Medicine, University of Chicago, 5841 S Maryland Avenue, MC6026, Chicago, IL 60637, USA.
| | - G R Scott Budinger
- Department of Medicine and Pulmonary and Critical Care Medicine, Northwestern University, 240 E Huron Street, M300, Chicago, IL 60611, USA.
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40
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Affiliation(s)
- Joshua D Rabinowitz
- Department of Chemistry and Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA.
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL, USA
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Abstract
Air pollution is a complex mixture of gaseous and particulate components, each of which has detrimental effects on human health. While the composition of air pollution varies greatly depending on the source, studies from across the world have consistently shown that air pollution is an important modifiable risk factor for significantly increased morbidity and mortality. Moreover, clinical studies have generally shown a greater impact of particulate matter (PM) air pollution on health than the gaseous components. PM has wide-ranging deleterious effects on human health, particularly on the cardiovascular system. Both acute and chronic exposure to PM air pollution is associated with increased risk of death from cardiovascular diseases including ischemic heart disease, heart failure, and ischemic/thrombotic stroke. Particulate matter has also been shown to be an important endocrine disrupter, contributing to the development of metabolic diseases such as obesity and diabetes mellitus, which themselves are risk factors for cardiovascular disease. While the epidemiological evidence for the deleterious effects of PM air pollution on health is increasingly accepted, newer studies are shedding light on the mechanisms by which PM exerts its toxic effects. A greater understanding of how PM exerts toxic effects on human health is required in order to prevent and minimize the deleterious health effects of this ubiquitous environmental hazard. Air pollution is a growing public health problem and mortality due to air pollution is expected to double by 2050. Here, we review the epidemiological evidence for the cardiovascular effects of PM exposure and discuss current understanding about the biological mechanisms, by which PM exerts toxic effects on cardiovascular system to induce cardiovascular disease.
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Affiliation(s)
| | - Gökhan M. Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Chicago, Chicago, IL, United States
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Mutlu EA, Comba IY, Cho T, Engen PA, Yazıcı C, Soberanes S, Hamanaka RB, Niğdelioğlu R, Meliton AY, Ghio AJ, Budinger GRS, Mutlu GM. Inhalational exposure to particulate matter air pollution alters the composition of the gut microbiome. Environ Pollut 2018; 240:817-830. [PMID: 29783199 PMCID: PMC6400491 DOI: 10.1016/j.envpol.2018.04.130] [Citation(s) in RCA: 159] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 04/11/2018] [Accepted: 04/27/2018] [Indexed: 05/19/2023]
Abstract
Recent studies suggest an association between particulate matter (PM) air pollution and gastrointestinal (GI) disease. In addition to direct deposition, PM can be indirectly deposited in oropharynx via mucociliary clearance and upon swallowing of saliva and mucus. Within the GI tract, PM may alter the GI epithelium and gut microbiome. Our goal was to determine the effect of PM on gut microbiota in a murine model of PM exposure via inhalation. C57BL/6 mice were exposed via inhalation to either concentrated ambient particles or filtered air for 8-h per day, 5-days a week, for a total of 3-weeks. At exposure's end, GI tract tissues and feces were harvested, and gut microbiota was analyzed. Alpha-diversity was modestly altered with increased richness in PM-exposed mice compared to air-exposed mice in some parts of the GI tract. Most importantly, PM-induced alterations in the microbiota were very apparent in beta-diversity comparisons throughout the GI tract and appeared to increase from the proximal to distal parts. Changes in some genera suggest that distinct bacteria may have the capacity to bloom with PM exposure. Exposure to PM alters the microbiota throughout the GI tract which maybe a potential mechanism that explains PM induced inflammation in the GI tract.
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Affiliation(s)
- Ece A Mutlu
- Division of Digestive Diseases, Hepatology and Nutrition, Department of Internal Medicine, Rush University Medical Center, Chicago, IL, 60612, USA.
| | - Işın Y Comba
- Division of Digestive Diseases, Hepatology and Nutrition, Department of Internal Medicine, Rush University Medical Center, Chicago, IL, 60612, USA.
| | - Takugo Cho
- Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, 60637, USA.
| | - Phillip A Engen
- Division of Digestive Diseases, Hepatology and Nutrition, Department of Internal Medicine, Rush University Medical Center, Chicago, IL, 60612, USA.
| | - Cemal Yazıcı
- Division of Gastroenterology and Hepatology, University of Illinois at Chicago, Chicago, IL, 60612, USA.
| | - Saul Soberanes
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, IL, 60611, USA.
| | - Robert B Hamanaka
- Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, 60637, USA.
| | - Recep Niğdelioğlu
- Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, 60637, USA.
| | - Angelo Y Meliton
- Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, 60637, USA.
| | - Andrew J Ghio
- United States Environmental Protection Agency, Chapel Hill, NC, 27599, USA.
| | - G R Scott Budinger
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, IL, 60611, USA.
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, IL, 60637, USA.
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Hamanaka RB, Nigdelioglu R, Meliton AY, Tian Y, Witt LJ, O’Leary E, Sun KA, Woods PS, Wu D, Ansbro B, Ard S, Rohde JM, Dulin NO, Guzy RD, Mutlu GM. Inhibition of Phosphoglycerate Dehydrogenase Attenuates Bleomycin-induced Pulmonary Fibrosis. Am J Respir Cell Mol Biol 2018; 58:585-593. [PMID: 29019702 PMCID: PMC5946329 DOI: 10.1165/rcmb.2017-0186oc] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Accepted: 09/14/2017] [Indexed: 12/13/2022] Open
Abstract
Organ fibrosis, including idiopathic pulmonary fibrosis, is associated with significant morbidity and mortality. Because currently available therapies have limited effect, there is a need to better understand the mechanisms by which organ fibrosis occurs. We have recently reported that transforming growth factor (TGF)-β, a key cytokine that promotes fibrogenesis, induces the expression of the enzymes of the de novo serine and glycine synthesis pathway in human lung fibroblasts, and that phosphoglycerate dehydrogenase (PHGDH; the first and rate-limiting enzyme of the pathway) is required to promote collagen protein synthesis downstream of TGF-β. In this study, we investigated whether inhibition of de novo serine and glycine synthesis attenuates lung fibrosis in vivo. We found that TGF-β induces mRNA and protein expression of PHGDH in murine fibroblasts. Similarly, intratracheal administration of bleomycin resulted in increased expression of PHGDH in mouse lungs, localized to fibrotic regions. Using a newly developed small molecule inhibitor of PHGDH (NCT-503), we tested whether pharmacologic inhibition of PHGDH could inhibit fibrogenesis both in vitro and in vivo. Treatment of murine and human lung fibroblasts with NCT-503 decreased TGF-β-induced collagen protein synthesis. Mice treated with the PHGDH inhibitor beginning 7 days after intratracheal instillation of bleomycin had attenuation of lung fibrosis. These results indicate that the de novo serine and glycine synthesis pathway is necessary for TGF-β-induced collagen synthesis and bleomycin-induced pulmonary fibrosis. PHGDH and other enzymes in the de novo serine and glycine synthesis pathway may be a therapeutic target for treatment of fibrotic diseases, including idiopathic pulmonary fibrosis.
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Affiliation(s)
- Robert B. Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Recep Nigdelioglu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Angelo Y. Meliton
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Yufeng Tian
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Leah J. Witt
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Erin O’Leary
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Kaitlyn A. Sun
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Parker S. Woods
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - David Wu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Brandon Ansbro
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Shawn Ard
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Jason M. Rohde
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland
| | - Nickolai O. Dulin
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Robert D. Guzy
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
| | - Gökhan M. Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, Illinois; and
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Affiliation(s)
| | | | - Gökhan M Mutlu
- 3 Department of Medicine, Pritzker School of Medicine, University of Chicago, Chicago, Illinois
| | | | - Ankit Bharat
- 1 Department of Medicine.,4 Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois; and
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Huang RT, Wu D, Meliton A, Oh MJ, Krause M, Lloyd JA, Nigdelioglu R, Hamanaka RB, Jain MK, Birukova A, Kress JP, Birukov KG, Mutlu GM, Fang Y. Experimental Lung Injury Reduces Krüppel-like Factor 2 to Increase Endothelial Permeability via Regulation of RAPGEF3-Rac1 Signaling. Am J Respir Crit Care Med 2017; 195:639-651. [PMID: 27855271 DOI: 10.1164/rccm.201604-0668oc] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
RATIONALE Acute respiratory distress syndrome (ARDS) is caused by widespread endothelial barrier disruption and uncontrolled cytokine storm. Genome-wide association studies (GWAS) have linked multiple genes to ARDS. Although mechanosensitive transcription factor Krüppel-like factor 2 (KLF2) is a major regulator of endothelial function, its role in regulating pulmonary vascular integrity in lung injury and ARDS-associated GWAS genes remains poorly understood. OBJECTIVES To examine KLF2 expression in multiple animal models of acute lung injury and further elucidate the KLF2-mediated pathways involved in endothelial barrier disruption and cytokine storm in experimental lung injury. METHODS Animal and in vitro models of acute lung injury were used to characterize KLF2 expression and its downstream effects responding to influenza A virus (A/WSN/33 [H1N1]), tumor necrosis factor-α, LPS, mechanical stretch/ventilation, or microvascular flow. KLF2 manipulation, permeability measurements, small GTPase activity, luciferase assays, chromatin immunoprecipitation assays, and network analyses were used to determine the mechanistic roles of KLF2 in regulating endothelial monolayer integrity, ARDS-associated GWAS genes, and lung pathophysiology. MEASUREMENTS AND MAIN RESULTS KLF2 is significantly reduced in several animal models of acute lung injury. Microvascular endothelial KLF2 is significantly induced by capillary flow but reduced by pathologic cyclic stretch and inflammatory stimuli. KLF2 is a novel activator of small GTPase Ras-related C3 botulinum toxin substrate 1 by transcriptionally controlling Rap guanine nucleotide exchange factor 3/exchange factor directly activated by cyclic adenosine monophosphate, which maintains vascular integrity. KLF2 regulates multiple ARDS GWAS genes related to cytokine storm, oxidation, and coagulation in lung microvascular endothelium. KLF2 overexpression ameliorates LPS-induced lung injury in mice. CONCLUSIONS Disruption of endothelial KLF2 results in dysregulation of lung microvascular homeostasis and contributes to lung pathology in ARDS.
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Affiliation(s)
- Ru-Ting Huang
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - David Wu
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Angelo Meliton
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Myung-Jin Oh
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Matthew Krause
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Joyce A Lloyd
- 2 Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia; and
| | - Recep Nigdelioglu
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Robert B Hamanaka
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Mukesh K Jain
- 3 Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, Ohio
| | - Anna Birukova
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - John P Kress
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Konstantin G Birukov
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Gökhan M Mutlu
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Yun Fang
- 1 Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, Illinois
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Misharin AV, Morales-Nebreda L, Reyfman PA, Cuda CM, Walter JM, McQuattie-Pimentel AC, Chen CI, Anekalla KR, Joshi N, Williams KJN, Abdala-Valencia H, Yacoub TJ, Chi M, Chiu S, Gonzalez-Gonzalez FJ, Gates K, Lam AP, Nicholson TT, Homan PJ, Soberanes S, Dominguez S, Morgan VK, Saber R, Shaffer A, Hinchcliff M, Marshall SA, Bharat A, Berdnikovs S, Bhorade SM, Bartom ET, Morimoto RI, Balch WE, Sznajder JI, Chandel NS, Mutlu GM, Jain M, Gottardi CJ, Singer BD, Ridge KM, Bagheri N, Shilatifard A, Budinger GRS, Perlman H. Monocyte-derived alveolar macrophages drive lung fibrosis and persist in the lung over the life span. J Exp Med 2017; 214:2387-2404. [PMID: 28694385 PMCID: PMC5551573 DOI: 10.1084/jem.20162152] [Citation(s) in RCA: 649] [Impact Index Per Article: 92.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 04/02/2017] [Accepted: 05/25/2017] [Indexed: 01/06/2023] Open
Abstract
Misharin et al. elucidate the fate and function of monocyte-derived alveolar macrophages during the course of pulmonary fibrosis. These cells persisted throughout the life span, were enriched for the expression of profibrotic genes, and their genetic ablation ameliorated development of pulmonary fibrosis. Little is known about the relative importance of monocyte and tissue-resident macrophages in the development of lung fibrosis. We show that specific genetic deletion of monocyte-derived alveolar macrophages after their recruitment to the lung ameliorated lung fibrosis, whereas tissue-resident alveolar macrophages did not contribute to fibrosis. Using transcriptomic profiling of flow-sorted cells, we found that monocyte to alveolar macrophage differentiation unfolds continuously over the course of fibrosis and its resolution. During the fibrotic phase, monocyte-derived alveolar macrophages differ significantly from tissue-resident alveolar macrophages in their expression of profibrotic genes. A population of monocyte-derived alveolar macrophages persisted in the lung for one year after the resolution of fibrosis, where they became increasingly similar to tissue-resident alveolar macrophages. Human homologues of profibrotic genes expressed by mouse monocyte-derived alveolar macrophages during fibrosis were up-regulated in human alveolar macrophages from fibrotic compared with normal lungs. Our findings suggest that selectively targeting alveolar macrophage differentiation within the lung may ameliorate fibrosis without the adverse consequences associated with global monocyte or tissue-resident alveolar macrophage depletion.
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Affiliation(s)
- Alexander V Misharin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Luisa Morales-Nebreda
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Paul A Reyfman
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Carla M Cuda
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - James M Walter
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Alexandra C McQuattie-Pimentel
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Ching-I Chen
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Kishore R Anekalla
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Nikita Joshi
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Kinola J N Williams
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Hiam Abdala-Valencia
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Tyrone J Yacoub
- Department of Chemical and Biological Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL
| | - Monica Chi
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Stephen Chiu
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL.,Division of Thoracic Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Francisco J Gonzalez-Gonzalez
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Khalilah Gates
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Anna P Lam
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Trevor T Nicholson
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Philip J Homan
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Saul Soberanes
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Salina Dominguez
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Vince K Morgan
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Rana Saber
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Alexander Shaffer
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Monique Hinchcliff
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Stacy A Marshall
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Ankit Bharat
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL.,Division of Thoracic Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Sergejs Berdnikovs
- Division of Allergy and Immunology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Sangeeta M Bhorade
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Elizabeth T Bartom
- Division of Thoracic Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Richard I Morimoto
- Department of Molecular Biosciences, Rice Institute for Biomedical Research, Northwestern University, Evanston, IL
| | - William E Balch
- Department of Molecular Medicine, The Scripps Research Institutes, La Jolla, CA
| | - Jacob I Sznajder
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Navdeep S Chandel
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, University of Chicago, Chicago, IL
| | - Manu Jain
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Cara J Gottardi
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Benjamin D Singer
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Karen M Ridge
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Neda Bagheri
- Division of Rheumatology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Ali Shilatifard
- Division of Thoracic Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - G R Scott Budinger
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Harris Perlman
- Department of Chemical and Biological Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL
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Gileles-Hillel A, Almendros I, Khalyfa A, Nigdelioglu R, Qiao Z, Hamanaka RB, Mutlu GM, Akbarpour M, Gozal D. Prolonged Exposures to Intermittent Hypoxia Promote Visceral White Adipose Tissue Inflammation in a Murine Model of Severe Sleep Apnea: Effect of Normoxic Recovery. Sleep 2017; 40:2731734. [PMID: 28329220 DOI: 10.1093/sleep/zsw074] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [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: 12/29/2022] Open
Abstract
Study Objective Increased visceral white adipose tissue (vWAT) mass results in infiltration of inflammatory macrophages that drive inflammation and insulin resistance. Patients with obstructive sleep apnea (OSA) suffer from increased prevalence of obesity, insulin resistance, and metabolic syndrome. Murine models of intermittent hypoxia (IH) mimicking moderate-severe OSA manifest insulin resistance following short-term IH. We examined in mice the effect of long-term IH on the inflammatory cellular changes within vWAT and the potential effect of normoxic recovery (IH-R). Methods Male C57BL/6J mice were subjected to IH for 20 weeks, and a subset was allowed to recover in room air (RA) for 6 or 12 weeks (IH-R). Stromal vascular fraction was isolated from epididymal vWAT and mesenteric vWAT depots, and single-cell suspensions were prepared for flow cytometry analyses, reactive oxygen species (ROS), and metabolic assays. Results IH reduced body weight and vWAT mass and IH-R resulted in catch-up weight and vWAT mass. IH-exposed vWAT exhibited increased macrophage counts (ATMs) that were only partially improved in IH-R. IH also caused a proinflammatory shift in ATMs (increased Ly6c(hi)(+) and CD36(+) ATMs). These changes were accompanied by increased vWAT insulin resistance with only partial improvements in IH-R. In addition, ATMs exhibited increased ROS production, altered metabolism, and changes in electron transport chain, which were only partially improved in IH-R. Conclusion Prolonged exposures to IH during the sleep period induce pronounced vWAT inflammation and insulin resistance despite concomitant vWAT mass reductions. These changes are only partially reversible after 3 months of normoxic recovery. Thus, long-lasting OSA may preclude complete reversibility of metabolic changes.
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Affiliation(s)
- Alex Gileles-Hillel
- Sections of Pediatric Sleep Medicine and Pulmonology, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - Isaac Almendros
- Sections of Pediatric Sleep Medicine and Pulmonology, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - Abdelnaby Khalyfa
- Sections of Pediatric Sleep Medicine and Pulmonology, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - Recep Nigdelioglu
- Department of Medicine, Section of Pulmonary and Critical Care, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - Zhuanhong Qiao
- Sections of Pediatric Sleep Medicine and Pulmonology, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - Robert B Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - Mahzad Akbarpour
- Sections of Pediatric Sleep Medicine and Pulmonology, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
| | - David Gozal
- Sections of Pediatric Sleep Medicine and Pulmonology, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL
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Wu D, Huang RT, Hamanaka RB, Krause M, Oh MJ, Kuo CH, Nigdelioglu R, Meliton AY, Witt L, Dai G, Civelek M, Prabhakar NR, Fang Y, Mutlu GM. HIF-1α is required for disturbed flow-induced metabolic reprogramming in human and porcine vascular endothelium. eLife 2017; 6. [PMID: 28556776 PMCID: PMC5495571 DOI: 10.7554/elife.25217] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [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: 01/17/2017] [Accepted: 05/26/2017] [Indexed: 12/13/2022] Open
Abstract
Hemodynamic forces regulate vascular functions. Disturbed flow (DF) occurs in arterial bifurcations and curvatures, activates endothelial cells (ECs), and results in vascular inflammation and ultimately atherosclerosis. However, how DF alters EC metabolism, and whether resulting metabolic changes induce EC activation, is unknown. Using transcriptomics and bioenergetic analysis, we discovered that DF induces glycolysis and reduces mitochondrial respiratory capacity in human aortic ECs. DF-induced metabolic reprogramming required hypoxia inducible factor-1α (HIF-1α), downstream of NAD(P)H oxidase-4 (NOX4)-derived reactive oxygen species (ROS). HIF-1α increased glycolytic enzymes and pyruvate dehydrogenase kinase-1 (PDK-1), which reduces mitochondrial respiratory capacity. Swine aortic arch endothelia exhibited elevated ROS, NOX4, HIF-1α, and glycolytic enzyme and PDK1 expression, suggesting that DF leads to metabolic reprogramming in vivo. Inhibition of glycolysis reduced inflammation suggesting a causal relationship between flow-induced metabolic changes and EC activation. These findings highlight a previously uncharacterized role for flow-induced metabolic reprogramming and inflammation in ECs. DOI:http://dx.doi.org/10.7554/eLife.25217.001 Atherosclerosis is the build-up of fatty material inside the blood vessels, and is one of the leading causes of heart disease and stroke. The blood vessels affected are typically inflamed for many years before the condition develops, and the condition often occurs at sites where blood vessels branch or turn. The cells that line the inside of the blood vessels are known as endothelial cells. Flowing blood exerts a force upon the endothelial cells, named “shear force”, which is similar to how wind bends plants. When the blood flows in one direction, the shear forces are high, the endothelial cells are tightly held together, and the vessels are less likely to become inflamed. However, the flow of blood is disturbed around turns or branch points. This means thatthe shear forces are lower and that the gaps between the endothelial cells are bigger. Low shear forces also mean that the endothelial cells release chemical signals that promote the inflammation and ultimately leads to atherosclerosis. Though low shear forces play an important role in “activating” endothelial cells to promote inflammation, it was not clear how this happens. Wu et al. now show that when shear forces inside blood vessels are low, endothelial cells promote inflammation by modifying their own metabolism. The experiments involved applying either high or low shear forces to endothelial cells that had originally been collected from a major blood vessel of human donors, and then grown in the laboratory. Wu et al. then analyzed the gene activity of these endothelial cells and discovered that low shear forces activate a selected pool of genes. The activated genes are mainly responsible for two cellular processes: glycolysis and the response to hypoxia. Glycolysis is a process that releases energy by breaking down the sugar glucose, while hypoxia refers to the situation when cells do not receive enough oxygen. Further molecular analyses revealed that low shear forces stabilize a particular protein involved in the response to hypoxia, named HIF-1α, and that this protein is responsible for stimulating glycolysis. Finally, Wu et al. showed that increasing glycolysis in endothelial cells was enough to cause the blood vessels to become inflamed. Going forward, a better understanding of how low shear forces modify the metabolism of endothelial cells in blood vessels and consequently promote inflammation will help scientists to tackle new questions about how atherosclerosis begins and develops. In the longer-term, these findings might also lead to the development of new treatments to atherosclerosis and similar diseases. DOI:http://dx.doi.org/10.7554/eLife.25217.002
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Affiliation(s)
- David Wu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Ru-Ting Huang
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Robert B Hamanaka
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Matt Krause
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Myung-Jin Oh
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Cheng-Hsiang Kuo
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Recep Nigdelioglu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Angelo Y Meliton
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Leah Witt
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Guohao Dai
- Department of Bioengineering, Northeastern University, Boston, United States
| | - Mete Civelek
- Department of Biomedical Engineering, University of Virginia, Charlottesville, United States
| | - Nanduri R Prabhakar
- Institute for Integrative Physiology, The University of Chicago, Chicago, United States
| | - Yun Fang
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
| | - Gökhan M Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, The University of Chicago, Chicago, United States
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Hamanaka RB, Mutlu GM. PFKFB3, a Direct Target of p63, Is Required for Proliferation and Inhibits Differentiation in Epidermal Keratinocytes. J Invest Dermatol 2017; 137:1267-1276. [PMID: 28108301 DOI: 10.1016/j.jid.2016.12.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 11/28/2016] [Accepted: 12/19/2016] [Indexed: 02/08/2023]
Abstract
p63 is a transcription factor essential for epidermal development and homeostasis. p63 is a member of the p53 family of transcription factors, which are increasingly understood to be regulators of cellular metabolism. How p63 regulates metabolism in epidermal keratinocytes is incompletely understood, and it is unknown whether glycolytic regulation is essential to maintain the balance between proliferation and differentiation within the epidermis. We found that p63 promotes glycolytic metabolism in epidermal keratinocytes. p63 bound to consensus sites within the PFKFB3 gene and was required for PFKFB3 mRNA and protein expression. PFKFB3 overexpression inhibited differentiation of keratinocytes, whereas knockdown inhibited proliferation and increased the rate of differentiation. Furthermore, we found that PFKFB3 was highly expressed in psoriatic epidermis. Our results show that PFKFB3 is a key regulator of epidermal homeostasis and may represent a therapeutic target for epidermal diseases associated with hyperproliferation and impaired differentiation.
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Affiliation(s)
- Robert B Hamanaka
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, Pritzker School of Medicine, The University of Chicago, Chicago, Illinois, USA.
| | - Gökhan M Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, Pritzker School of Medicine, The University of Chicago, Chicago, Illinois, USA
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La J, Reed E, Chan L, Smolyaninova LV, Akomova OA, Mutlu GM, Orlov SN, Dulin NO. Downregulation of TGF-β Receptor-2 Expression and Signaling through Inhibition of Na/K-ATPase. PLoS One 2016; 11:e0168363. [PMID: 28006004 PMCID: PMC5179089 DOI: 10.1371/journal.pone.0168363] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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: 08/07/2016] [Accepted: 11/30/2016] [Indexed: 01/06/2023] Open
Abstract
Transforming growth factor-beta (TGF-β) is a multi-functional cytokine implicated in the control of cell growth and differentiation. TGF-β signals through a complex of TGF-β receptors 1 and 2 (TGFβR1 and TGFβR2) that phosphorylate and activate Smad2/3 transcription factors driving transcription of the Smad-target genes. The Na+/K+-ATPase is an integral plasma membrane protein critical for maintaining the electro-chemical gradient of Na+ and K+ in the cell. We found that inhibition of the Na+/K+ ATPase by ouabain results in a dramatic decrease in the expression of TGFβR2 in human lung fibrobalsts (HLF) at the mRNA and protein levels. This was accompanied by inhibition of TGF-β-induced Smad phosphorylation and the expression of TGF-β target genes, such as fibronectin and smooth muscle alpha-actin. Inhibition of Na+/K+ ATPase by an alternative approach (removal of extracellular potassium) had a similar effect in HLF. Finally, treatment of lung alveolar epithelial cells (A549) with ouabain also resulted in the downregulation of TGFβR2, the inhibition of TGF-β-induced Smad phosphorylation and of the expression of mesenchymal markers, vimentin and fibronectin. Together, these data demonstrate a critical role of Na+/K+-ATPase in the control of TGFβR2 expression, TGF-β signaling and cell responses to TGF-β.
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Affiliation(s)
- Jennifer La
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, IL, United States of America
| | - Eleanor Reed
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, IL, United States of America
| | - Lan Chan
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, IL, United States of America
| | - Larisa V. Smolyaninova
- Laboratory of Biomembranes, Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Olga A. Akomova
- Laboratory of Biomembranes, Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Gökhan M. Mutlu
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, IL, United States of America
| | - Sergei N. Orlov
- Laboratory of Biomembranes, Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
- Siberian Medical State University, Tomsk, Russia
| | - Nickolai O. Dulin
- Department of Medicine, Section of Pulmonary and Critical Care Medicine, the University of Chicago, Chicago, IL, United States of America
- Siberian Medical State University, Tomsk, Russia
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