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Watanabe K, Kato A, Adachi H, Noguchi A, Arai H, Ito M, Namba F, Takahashi T. Genetic Ablation of Pyruvate Dehydrogenase Kinase Isoform 4 Gene Enhances Recovery from Hyperoxic Lung Injury: Insights into Antioxidant and Inflammatory Mechanisms. Biomedicines 2024; 12:746. [PMID: 38672101 PMCID: PMC11047825 DOI: 10.3390/biomedicines12040746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 03/19/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Pyruvate dehydrogenase kinase isoform 4 (PDK4) plays a pivotal role in the regulation of cellular proliferation and apoptosis. The objective of this study was to examine whether the genetic depletion of the PDK4 gene attenuates hyperoxia-induced lung injury in neonatal mice. METHODS Neonatal PDK4-/- mice and wild-type (WT) mice were exposed to oxygen concentrations of 21% (normoxia) and 95% (hyperoxia) for the first 4 days of life. Pulmonary histological assessments were performed, and the mRNA levels of lung PDK4, monocyte chemoattractant protein (MCP)-1 and interleukin (IL)-6 were assessed. The levels of inflammatory cytokines in lung tissue were quantified. RESULTS Following convalescence from neonatal hyperoxia, PDK4-/- mice exhibited improved lung alveolarization. Notably, PDK4-/- mice displayed significantly elevated MCP-1 protein levels in pulmonary tissues following 4 days of hyperoxic exposure, whereas WT mice showed increased IL-6 protein levels under similar conditions. Furthermore, neonatal PDK4-/- mice subjected to hyperoxia demonstrated markedly higher MCP-1 mRNA expression at 4 days of age compared to WT mice, while IL-6 mRNA expression remained unaffected in PDK4-/- mice. CONCLUSIONS Newborn PDK4-/- mice exhibited notable recovery from hyperoxia-induced lung injury, suggesting the potential protective role of PDK4 depletion in mitigating lung damage.
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Affiliation(s)
- Keisuke Watanabe
- Department of Pediatrics, Graduate School of Medicine, Akita University, Akita 010-8543, Japan; (K.W.); (A.K.); (H.A.); (A.N.); (T.T.)
| | - Akie Kato
- Department of Pediatrics, Graduate School of Medicine, Akita University, Akita 010-8543, Japan; (K.W.); (A.K.); (H.A.); (A.N.); (T.T.)
| | - Hiroyuki Adachi
- Department of Pediatrics, Graduate School of Medicine, Akita University, Akita 010-8543, Japan; (K.W.); (A.K.); (H.A.); (A.N.); (T.T.)
| | - Atsuko Noguchi
- Department of Pediatrics, Graduate School of Medicine, Akita University, Akita 010-8543, Japan; (K.W.); (A.K.); (H.A.); (A.N.); (T.T.)
| | - Hirokazu Arai
- Department of Neonatology, Akita Red Cross Hospital, Akita 010-1495, Japan;
| | - Masato Ito
- Department of Pediatrics, Graduate School of Medicine, Akita University, Akita 010-8543, Japan; (K.W.); (A.K.); (H.A.); (A.N.); (T.T.)
| | - Fumihiko Namba
- Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe 350-8550, Japan;
| | - Tsutomu Takahashi
- Department of Pediatrics, Graduate School of Medicine, Akita University, Akita 010-8543, Japan; (K.W.); (A.K.); (H.A.); (A.N.); (T.T.)
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Vohwinkel CU, Burns N, Coit E, Yuan X, Vladar EK, Sul C, Schmidt EP, Carmeliet P, Stenmark K, Nozik ES, Tuder RM, Eltzschig HK. HIF1A-dependent induction of alveolar epithelial PFKFB3 dampens acute lung injury. JCI Insight 2022; 7:e157855. [PMID: 36326834 PMCID: PMC9869967 DOI: 10.1172/jci.insight.157855] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 10/28/2022] [Indexed: 11/06/2022] Open
Abstract
Acute lung injury (ALI) is a severe form of lung inflammation causing acute respiratory distress syndrome in patients. ALI pathogenesis is closely linked to uncontrolled alveolar inflammation. We hypothesize that specific enzymes of the glycolytic pathway could function as key regulators of alveolar inflammation. Therefore, we screened isolated alveolar epithelia from mice exposed to ALI induced by injurious ventilation to assess their metabolic responses. These studies pointed us toward a selective role for isoform 3 of the 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFKFB3). Pharmacologic inhibition or genetic deletion of Pfkfb3 in alveolar epithelia (Pfkfb3loxP/loxP SPC-ER-Cre+ mice) was associated with profound increases in ALI during injurious mechanical ventilation or acid instillation. Studies in genetic models linked Pfkfb3 expression and function to Hif1a. Not only did intratracheal pyruvate instillation reconstitute Pfkfb3loxP/loxP or Hif1aloxP/loxP SPC-ER-Cre+ mice, but pyruvate was also effective in ALI treatment of wild-type mice. Finally, proof-of-principle studies in human lung biopsies demonstrated increased PFKFB3 staining in injured lungs and colocalized PFKFB3 to alveolar epithelia. These studies reveal a specific role for PFKFB3 in counterbalancing alveolar inflammation and lay the groundwork for novel metabolic therapeutic approaches during ALI.
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Affiliation(s)
- Christine U. Vohwinkel
- Cardio Vascular Pulmonary Research Lab and
- Section of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Nana Burns
- Cardio Vascular Pulmonary Research Lab and
- Section of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Ethan Coit
- Cardio Vascular Pulmonary Research Lab and
- Section of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Xiaoyi Yuan
- Department of Anesthesiology, Critical Care and Pain Medicine, University of Texas Health Science Center Houston, Houston, Texas, USA
| | - Eszter K. Vladar
- Program in Translational Lung Research, Division of Pulmonary Sciences and Critical Care Medicine, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Christina Sul
- Section of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Eric P. Schmidt
- Program in Translational Lung Research, Division of Pulmonary Sciences and Critical Care Medicine, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Vascular Metabolism, Department of Oncology and Leuven Cancer Institute (LKI), KU Leuven, VIB Center for Cancer Biology, VIB, Leuven, Belgium
- Laboratory of Angiogenesis and Vascular Heterogeneity, Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Kurt Stenmark
- Cardio Vascular Pulmonary Research Lab and
- Section of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Eva S. Nozik
- Cardio Vascular Pulmonary Research Lab and
- Section of Critical Care Medicine, Department of Pediatrics, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Rubin M. Tuder
- Cardio Vascular Pulmonary Research Lab and
- Program in Translational Lung Research, Division of Pulmonary Sciences and Critical Care Medicine, School of Medicine, University of Colorado, Aurora, Colorado, USA
| | - Holger K. Eltzschig
- Department of Anesthesiology, Critical Care and Pain Medicine, University of Texas Health Science Center Houston, Houston, Texas, USA
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Alva R, Mirza M, Baiton A, Lazuran L, Samokysh L, Bobinski A, Cowan C, Jaimon A, Obioru D, Al Makhoul T, Stuart JA. Oxygen toxicity: cellular mechanisms in normobaric hyperoxia. Cell Biol Toxicol 2022; 39:111-143. [PMID: 36112262 PMCID: PMC9483325 DOI: 10.1007/s10565-022-09773-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 09/07/2022] [Indexed: 12/15/2022]
Abstract
In clinical settings, oxygen therapy is administered to preterm neonates and to adults with acute and chronic conditions such as COVID-19, pulmonary fibrosis, sepsis, cardiac arrest, carbon monoxide poisoning, and acute heart failure. In non-clinical settings, divers and astronauts may also receive supplemental oxygen. In addition, under current standard cell culture practices, cells are maintained in atmospheric oxygen, which is several times higher than what most cells experience in vivo. In all the above scenarios, the elevated oxygen levels (hyperoxia) can lead to increased production of reactive oxygen species from mitochondria, NADPH oxidases, and other sources. This can cause cell dysfunction or death. Acute hyperoxia injury impairs various cellular functions, manifesting ultimately as physiological deficits. Chronic hyperoxia, particularly in the neonate, can disrupt development, leading to permanent deficiencies. In this review, we discuss the cellular activities and pathways affected by hyperoxia, as well as strategies that have been developed to ameliorate injury.
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Affiliation(s)
- Ricardo Alva
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Maha Mirza
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Adam Baiton
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Lucas Lazuran
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Lyuda Samokysh
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Ava Bobinski
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Cale Cowan
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Alvin Jaimon
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Dede Obioru
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Tala Al Makhoul
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Jeffrey A Stuart
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada.
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Lee E, Park SY, Moon JY, Ko JY, Kim TK, Im GI. Metabolic Switch Under Glucose Deprivation Leading to Discovery of NR2F1 as a Stimulus of Osteoblast Differentiation. J Bone Miner Res 2022; 37:1382-1399. [PMID: 35462433 DOI: 10.1002/jbmr.4565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 04/13/2022] [Accepted: 04/20/2022] [Indexed: 12/13/2022]
Abstract
Poor survival of grafted cells is the major impediment of successful cell-based therapies for bone regeneration. Implanted cells undergo rapid death in an ischemic environment largely because of hypoxia and metabolic stress from glucose deficiency. Understanding the intracellular metabolic processes and finding genes that can improve cell survival in these inhospitable conditions are necessary to enhance the success of cell therapies. Thus, the purpose of this study was to investigate changes of metabolic profile in glucose-deprived human bone marrow stromal/stem cells (hBMSCs) through metabolomics analysis and discover genes that could promote cell survival and osteogenic differentiation in a glucose-deprived microenvironment. Metabolomics analysis was performed to determine metabolic changes in a glucose stress metabolic model. In the absence of glucose, expression levels of all metabolites involved in glycolysis were significantly decreased than those in a glucose-supplemented state. In glucose-deprived osteogenic differentiation, reliance on tricarboxylic acid cycle (TCA)-predicted oxidative phosphorylation instead of glycolysis as the main mechanism for energy production in osteogenic induction. By comparing differentially expressed genes between glucose-deprived and glucose-supplemented hBMSCs, NR2F1 (Nuclear Receptor Subfamily 2 Group F Member 1) gene was discovered to be associated with enhanced survival and osteogenic differentiation in cells under metabolic stress. Small, interfering RNA (siRNA) for NR2F1 reduced cell viability and osteogenic differentiation of hBMSCs under glucose-supplemented conditions whereas NR2F1 overexpression enhanced osteogenic differentiation and cell survival of hBMSCs in glucose-deprived osteogenic conditions via the protein kinase B (AKT)/extracellular signal-regulated kinase (ERK) pathway. NR2F1-transfected hBMSCs significantly enhanced new bone formation in a critical size long-bone defect of rats compared with control vector-transfected hBMSCs. In conclusion, the results of this study provide an understanding of the metabolic profile of implanted cells in an ischemic microenvironment and demonstrate that NR2F1 treatment may overcome this deprivation by enhancing AKT and ERK regulation. These findings can be utilized in regenerative medicine for bone regeneration. © 2022 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Eugene Lee
- Research Institute for Integrative Regenerative Biomedical Engineering, Dongguk University, Goyang, Republic of Korea
| | - Seo-Young Park
- Research Institute for Integrative Regenerative Biomedical Engineering, Dongguk University, Goyang, Republic of Korea
| | - Jae-Yeon Moon
- Research Institute for Integrative Regenerative Biomedical Engineering, Dongguk University, Goyang, Republic of Korea
| | - Ji-Yun Ko
- Research Institute for Integrative Regenerative Biomedical Engineering, Dongguk University, Goyang, Republic of Korea
| | - Tae Kyung Kim
- Research Institute for Integrative Regenerative Biomedical Engineering, Dongguk University, Goyang, Republic of Korea
| | - Gun-Il Im
- Research Institute for Integrative Regenerative Biomedical Engineering, Dongguk University, Goyang, Republic of Korea.,Department of Orthopaedics, Dongguk University Ilsan Hospital, Goyang, Republic of Korea
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McCulley DJ, Jensen EA, Sucre JMS, McKenna S, Sherlock LG, Dobrinskikh E, Wright CJ. Racing against time: leveraging preclinical models to understand pulmonary susceptibility to perinatal acetaminophen exposures. Am J Physiol Lung Cell Mol Physiol 2022; 323:L1-L13. [PMID: 35503238 PMCID: PMC9208439 DOI: 10.1152/ajplung.00080.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/20/2022] [Accepted: 04/25/2022] [Indexed: 11/22/2022] Open
Abstract
Over the past decade, clinicians have increasingly prescribed acetaminophen (APAP) for patients in the neonatal intensive care unit (NICU). Acetaminophen has been shown to reduce postoperative opiate burden, and may provide similar efficacy for closure of the patent ductus arteriosus (PDA) as nonsteroidal anti-inflammatory drugs (NSAIDs). Despite these potential benefits, APAP exposures have spread to increasingly less mature infants, a highly vulnerable population for whom robust pharmacokinetic and pharmacodynamic data for APAP are lacking. Concerningly, preclinical studies suggest that perinatal APAP exposures may result in unanticipated adverse effects that are unique to the developing lung. In this review, we discuss the clinical observations linking APAP exposures to adverse respiratory outcomes and the preclinical data demonstrating a developmental susceptibility to APAP-induced lung injury. We show how clinical observations linking perinatal APAP exposures to pulmonary injury have been taken to the bench to produce important insights into the potential mechanisms underlying these findings. We argue that the available data support a more cautious approach to APAP use in the NICU until large randomized controlled trials provide appropriate safety and efficacy data.
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Affiliation(s)
- David J McCulley
- Division of Neonatology, Department of Pediatrics, University of California, San Diego, California
| | - Erik A Jensen
- Division of Neonatology, Department of Pediatrics, The Children's Hospital of Philadelphia, The University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
| | | | - Sarah McKenna
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Laura G Sherlock
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Evgenia Dobrinskikh
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | - Clyde J Wright
- Section of Neonatology, Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
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