1
|
Seetharaman S, Devany J, Kim HR, van Bodegraven E, Chmiel T, Tzu-Pin S, Chou WH, Fang Y, Gardel ML. Mechanosensitive FHL2 tunes endothelial function. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.16.599227. [PMID: 38948838 PMCID: PMC11212908 DOI: 10.1101/2024.06.16.599227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Endothelial tissues are essential mechanosensors in the vasculature and facilitate adaptation to various blood flow-induced mechanical cues. Defects in endothelial mechanoresponses can perturb tissue remodelling and functions leading to cardiovascular disease progression. In this context, the precise mechanisms of endothelial mechanoresponses contributing to normal and diseased tissue functioning remain elusive. Here, we sought to uncover how flow-mediated transcriptional regulation drives endothelial mechanoresponses in healthy and atherosclerotic-prone tissues. Using bulk RNA sequencing, we identify novel mechanosensitive genes in response to healthy unidirectional flow (UF) and athero-prone disturbed flow (DF). We find that the transcription as well as protein expression of Four-and-a-half LIM protein 2 (FHL2) are enriched in athero-prone DF both in vitro and in vivo . We then demonstrate that the exogenous expression of FHL2 is necessary and sufficient to drive discontinuous adherens junction morphology and increased tissue permeability. This athero-prone phenotype requires the force-sensitive binding of FHL2 to actin. In turn, the force-dependent localisation of FHL2 to stress fibres promotes microtubule dynamics to release the RhoGEF, GEF-H1, and activate the Rho-ROCK pathway. Thus, we unravelled a novel mechanochemical feedback wherein force-dependent FHL2 localisation promotes hypercontractility. This misregulated mechanoresponse creates highly permeable tissues, depicting classic hallmarks of atherosclerosis progression. Overall, we highlight crucial functions for the FHL2 force-sensitivity in tuning multi-scale endothelial mechanoresponses.
Collapse
|
2
|
Li C, Xue Y, Wu J, Zhang L, Yang T, Ai M, Han J, Zheng X, Wang R, Boldogh I, Ba X. MTH1 inhibition synergizes with ROS-inducing agents to trigger cervical cancer cells undergoing parthanatos. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167190. [PMID: 38657912 DOI: 10.1016/j.bbadis.2024.167190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 04/26/2024]
Abstract
Cervical cancer cells possess high levels of reactive oxygen species (ROS); thus, increasing oxidative stress above the toxicity threshold to induce cell death is a promising chemotherapeutic strategy. However, the underlying mechanisms of cell death are elusive, and efficacy and toxicity issues remain. Within DNA, 8-oxo-7,8-dihydroguanine (8-oxoG) is the most frequent base lesion repaired by 8-oxoguanine glycosylase 1 (OGG1)-initiated base excision repair. Cancer cells also express high levels of MutT homolog 1 (MTH1), which prevents DNA replication-induced incorporation of 8-oxoG into the genome by hydrolyzing 8-oxo-7,8-dihydro-2'-deoxyguanosine 5'-triphosphate (8-oxo-dGTP). Here, we revealed that ROS-inducing agents triggered cervical cancer to undergo parthanatos, which was mainly induced by massive DNA strand breaks resulting from overwhelming 8-oxoG excision by OGG1. Furthermore, the MTH1 inhibitor synergized with a relatively low dose of ROS-inducing agents by enhancing 8-oxoG loading in the DNA. In vivo, this drug combination suppressed the growth of tumor xenografts, and this inhibitory effect was significantly decreased in the absence of OGG1. Hence, the present study highlights the roles of base repair enzymes in cell death induction and suggests that the combination of lower doses of ROS-inducing agents with MTH1 inhibitors may be a more selective and safer strategy for cervical cancer chemotherapy.
Collapse
Affiliation(s)
- Chunshuang Li
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Yaoyao Xue
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Jiaxin Wu
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Lihong Zhang
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Tianming Yang
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Mengtao Ai
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Jinling Han
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Xu Zheng
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China
| | - Ruoxi Wang
- Key Laboratory of Animal Resistance Biology of Shandong Province, Institute of Biomedical Sciences, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Xueqing Ba
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Sciences, Northeast Normal University, Changchun, Jilin 130024, China.
| |
Collapse
|
3
|
Cao Y, Li F, Sun Z, Liu J, Liu J, Yang Q, Ge P, Luo Y, Chen H. Regulation of Microtubule Stability in Pulmonary Microvascular Endothelial Cells in Rats with Severe Acute Pancreatitis: Qingyi Decoction is a Potential CDK5 Inhibitor. J Inflamm Res 2024; 17:2513-2530. [PMID: 38699595 PMCID: PMC11063490 DOI: 10.2147/jir.s451755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 04/16/2024] [Indexed: 05/05/2024] Open
Abstract
Purpose Explore the therapeutic effects and regulatory mechanism of Qingyi Decoction (QYD) on severe acute pancreatitis (SAP) associated acute lung injury (ALI). Methods We identified the constituents absorbed into the blood of QYD based on a network pharmacological strategy. The differentially expressed genes from the GEO database were screened to identify the critical targets of QYD treatment of SAP-ALI. The SAP-ALI rat model was constructed.Some methods were used to evaluate the efficacy and mechanism of QYD in treating SAP-ALI. LPS-stimulated pulmonary microvascular endothelial cell injury simulated the SAP-induced pulmonary endothelial injury model. We further observed the therapeutic effect of QYD and CDK5 plasmid transfection on endothelial cell injury. Results 18 constituents were absorbed into the blood, and 764 targets were identified from QYD, 25 of which were considered core targets for treating SAP-ALI. CDK5 was identified as the most critical gene. The results of differential expression analysis showed that the mRNA expression level of CDK5 in the blood of SAP patients was significantly up-regulated compared with that of healthy people. Animal experiments have demonstrated that QYD can alleviate pancreatic and lung injury inflammatory response and reduce the upregulation of CDK5 in lung tissue. QYD or CDK5 inhibitors could decrease the expression of NFAT5 and GEF-H1, and increase the expression of ACE-tub in SAP rat lung tissue. Cell experiments proved that QYD could inhibit the expression of TNF-α and IL-6 induced by LPS. Immunofluorescence results suggested that QYD could alleviate the cytoskeleton damage of endothelial cells, and the mechanism might be related to the inhibition of CDK5-mediated activation of NFAT5, GEF-H1, and ACE-tub. Conclusion CDK5 has been identified as a critical target for pulmonary endothelial injury of SAP-ALI. QYD may partially alleviate microtubule disassembly by targeting the CDK5/NFAT5/GEF-H1 signaling pathway, thus relieving SAP-induced pulmonary microvascular endothelial cell injury.
Collapse
Affiliation(s)
- Yinan Cao
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Fan Li
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Zhenxuan Sun
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Jin Liu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Jie Liu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Qi Yang
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Peng Ge
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Yalan Luo
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| | - Hailong Chen
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, 116044, People’s Republic of China
- Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116011, People’s Republic of China
| |
Collapse
|
4
|
Long MB, Abo-Leyah H, Giam YH, Vadiveloo T, Hull RC, Keir HR, Pembridge T, Alferes De Lima D, Delgado L, Inglis SK, Hughes C, Gilmour A, Gierlinski M, New BJ, MacLennan G, Dinkova-Kostova AT, Chalmers JD. SFX-01 in hospitalised patients with community-acquired pneumonia during the COVID-19 pandemic: a double-blind, randomised, placebo-controlled trial. ERJ Open Res 2024; 10:00917-2023. [PMID: 38469377 PMCID: PMC10926007 DOI: 10.1183/23120541.00917-2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/15/2024] [Indexed: 03/13/2024] Open
Abstract
Introduction Sulforaphane can induce the transcription factor, Nrf2, promoting antioxidant and anti-inflammatory responses. In this study, hospitalised patients with community-acquired pneumonia (CAP) were treated with stabilised synthetic sulforaphane (SFX-01) to evaluate impact on clinical status and inflammation. Methods Double-blind, randomised, placebo-controlled trial of SFX-01 (300 mg oral capsule, once daily for 14 days) conducted in Dundee, UK, between November 2020 and May 2021. Patients had radiologically confirmed CAP and CURB-65 (confusion, urea >7 mmol·L-1, respiratory rate ≥30 breaths·min-1, blood pressure <90 mmHg (systolic) or ≤60 mmHg (diastolic), age ≥65 years) score ≥1. The primary outcome was the seven-point World Health Organization clinical status scale at day 15. Secondary outcomes included time to clinical improvement, length of stay and mortality. Effects on Nrf2 activity and inflammation were evaluated on days 1, 8 and 15 by measurement of 45 serum cytokines and mRNA sequencing of peripheral blood leukocytes. Results The trial was terminated prematurely due to futility with 133 patients enrolled. 65 patients were randomised to SFX-01 treatment and 68 patients to placebo. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection was the cause of CAP in 103 (77%) cases. SFX-01 treatment did not improve clinical status at day 15 (adjusted OR 0.87, 95% CI 0.41-1.83; p=0.71), time to clinical improvement (adjusted hazard ratio (aHR) 1.02, 95% CI 0.70-1.49), length of stay (aHR 0.84, 95% CI 0.56-1.26) or 28-day mortality (aHR 1.45, 95% CI 0.67-3.16). The expression of Nrf2 targets and pro-inflammatory genes, including interleukin (IL)-6, IL-1β and tumour necrosis factor-α, was not significantly changed by SFX-01 treatment. At days 8 and 15, respectively, 310 and 42 significant differentially expressed genes were identified between groups (false discovery rate adjusted p<0.05, log2FC >1). Conclusion SFX-01 treatment did not improve clinical status or modulate key Nrf2 targets in patients with CAP primarily due to SARS-CoV-2 infection.
Collapse
Affiliation(s)
- Merete B. Long
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
- These authors contributed equally
| | - Hani Abo-Leyah
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
- These authors contributed equally
| | - Yan Hui Giam
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Thenmalar Vadiveloo
- Centre for Healthcare Randomised Trials, University of Aberdeen, Aberdeen, UK
| | - Rebecca C. Hull
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Sheffield, UK
| | - Holly R. Keir
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Thomas Pembridge
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Daniela Alferes De Lima
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Lilia Delgado
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Sarah K. Inglis
- Tayside Clinical Trials Unit, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Chloe Hughes
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Amy Gilmour
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | - Marek Gierlinski
- Computational Biology, School of Life Sciences, University of Dundee, Dundee, UK
| | | | - Graeme MacLennan
- Centre for Healthcare Randomised Trials, University of Aberdeen, Aberdeen, UK
| | - Albena T. Dinkova-Kostova
- Division of Cellular and Systems Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
- Department of Pharmacology and Molecular Sciences and Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - James D. Chalmers
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| |
Collapse
|
5
|
Wang Q, Liu M, Liu Y, Zhang Z, Bai Z. Cigarette Smoke Extract and Lipopolysaccharide Induce Pyroptosis in Pulmonary Microvascular Endothelial Cells of Rats. Bull Exp Biol Med 2023; 174:728-733. [PMID: 37170021 DOI: 10.1007/s10517-023-05780-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Indexed: 05/13/2023]
Abstract
We studied the effect of cigarette smoke extract (CSE), LPS, or their combination on the activity and pyroptosis of pulmonary microvascular endothelial cells (PMVEC) in rats. PMVEC were cultured without treatment, with CSE in different concentrations (1-25%), with 20 ng/ml LPS, or with 20% CSE+20 ng/ml LPS. Cell viability was determined using the CCK8 kit, apoptosis was evaluated by flow cytometry, and cell morphology was evaluated using light microscopy. The content of IL-1β and IL-18 was measured by ELISA. CSE decreased cell viability in a dose-dependent manner. The morphology of cells in the CSE+LPS group showed the most significant cytomorphological changes and the highest pyroptosis rate. Flow cytometry showed that the apoptosis rates in the CSE and LPS groups were higher than in the control group, but the highest rate of apoptosis was revealed in the CSE+LPS group (p<0.01). The levels of IL-18 and IL-1β in the cell supernatant of the CSE, LPS, and CSE+LPS groups were significantly (p<0.01) increased in comparison with the control. These levels in the CSE+LPS group were higher (p<0.01) than in other groups. There were no differences between the CSE and LPS groups. Thus, the effect of CSE on cell viability is dose-dependent. Combined treatment with CSE+LPS can induce cell pyroptosis and increase the levels of inflammatory cytokines in PMVEC. These observations demonstrated that pyroptosis caused by CSE and LPS can play an important role in pulmonary vascular remodeling.
Collapse
Affiliation(s)
- Q Wang
- Department of Graduate School, Hunan University of Chinese Medicine, Changsha, China
| | - M Liu
- Department of Respiratory Medicine, the Affiliated Hospital of Hunan Academy of Chinese Medicine, Changsha, China
| | - Y Liu
- Department of Respiratory Medicine, the Affiliated Hospital of Hunan Academy of Chinese Medicine, Changsha, China
| | - Z Zhang
- Department of Graduate School, Hunan University of Chinese Medicine, Changsha, China
| | - Z Bai
- Department of Respiratory Medicine, the Affiliated Hospital of Hunan Academy of Chinese Medicine, Changsha, China.
| |
Collapse
|
6
|
Figueiredo RG, Guerreiro MLDS, Azevedo E, de Moura MS, Trindade SC, de Bessa J, Biondi I. Pathophysiological and Clinical Significance of Crotalus durissus cascavella Venom-Induced Pulmonary Impairment in a Murine Model. Toxins (Basel) 2023; 15:282. [PMID: 37104220 PMCID: PMC10141213 DOI: 10.3390/toxins15040282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/26/2023] [Accepted: 04/04/2023] [Indexed: 04/28/2023] Open
Abstract
Crotalus venom has broad biological activity, including neurotoxic, myotoxic, hematologic, and cytotoxic compounds that induce severe systemic repercussions. We evaluated the pathophysiological and clinical significance of Crotalus durissus cascavella (Cdc) venom-induced pulmonary impairment in mice. We conducted a randomized experimental study, involving 72 animals intraperitoneally inoculated with saline solution in the control group (CG), as well as venom in the experimental group (EG). The animals were euthanized at predetermined intervals (1 h, 3 h, 6 h, 12 h, 24 h, and 48 h), and lung fragments were collected for H&E and Masson histological analysis. The CG did not present inflammatory alterations in pulmonary parenchyma. In the EG, interstitial and alveolar swelling, necrosis, septal losses followed by alveolar distensions, and areas of atelectasis in the pulmonary parenchyma were observed after three hours. The EG morphometric analysis presented pulmonary inflammatory infiltrates at all time intervals, being more significant at three and six (p = 0.035) and six and 12 h (p = 0.006). The necrosis zones were significant at intervals of one and 24 h (p = 0.001), one and 48 h (p = 0.001), and three and 48 h (p = 0.035). Crotalus durissus cascavella venom induces a diffuse, heterogeneous, and acute inflammatory injury in the pulmonary parenchyma, with potential clinical implications for respiratory mechanics and gas exchange. The early recognition and prompt treatment of this condition are essential to prevent further lung injury and to improve outcomes.
Collapse
Affiliation(s)
- Ricardo G. Figueiredo
- Programa de Pós-Graduação em Saúde Coletiva, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
- Departamento de Saúde, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
| | - Marcos Lázaro da Silva Guerreiro
- Laboratório de Animais Peçonhentos e Herpetologia (LAPH), Departamento de Biologia, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
| | - Elen Azevedo
- Laboratório de Animais Peçonhentos e Herpetologia (LAPH), Departamento de Biologia, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
| | - Mateus Souza de Moura
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
| | - Soraya Castro Trindade
- Departamento de Saúde, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
| | - José de Bessa
- Programa de Pós-Graduação em Saúde Coletiva, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
- Departamento de Saúde, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
| | - Ilka Biondi
- Laboratório de Animais Peçonhentos e Herpetologia (LAPH), Departamento de Biologia, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
- Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana (UEFS), Feira de Santana 44036-900, Brazil
| |
Collapse
|
7
|
Carmona B, Marinho HS, Matos CL, Nolasco S, Soares H. Tubulin Post-Translational Modifications: The Elusive Roles of Acetylation. BIOLOGY 2023; 12:biology12040561. [PMID: 37106761 PMCID: PMC10136095 DOI: 10.3390/biology12040561] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 04/03/2023] [Indexed: 04/29/2023]
Abstract
Microtubules (MTs), dynamic polymers of α/β-tubulin heterodimers found in all eukaryotes, are involved in cytoplasm spatial organization, intracellular transport, cell polarity, migration and division, and in cilia biology. MTs functional diversity depends on the differential expression of distinct tubulin isotypes and is amplified by a vast number of different post-translational modifications (PTMs). The addition/removal of PTMs to α- or β-tubulins is catalyzed by specific enzymes and allows combinatory patterns largely enriching the distinct biochemical and biophysical properties of MTs, creating a code read by distinct proteins, including microtubule-associated proteins (MAPs), which allow cellular responses. This review is focused on tubulin-acetylation, whose cellular roles continue to generate debate. We travel through the experimental data pointing to α-tubulin Lys40 acetylation role as being a MT stabilizer and a typical PTM of long lived MTs, to the most recent data, suggesting that Lys40 acetylation enhances MT flexibility and alters the mechanical properties of MTs, preventing MTs from mechanical aging characterized by structural damage. Additionally, we discuss the regulation of tubulin acetyltransferases/desacetylases and their impacts on cell physiology. Finally, we analyze how changes in MT acetylation levels have been found to be a general response to stress and how they are associated with several human pathologies.
Collapse
Affiliation(s)
- Bruno Carmona
- Centro de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
| | - H Susana Marinho
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Catarina Lopes Matos
- Centro de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Sofia Nolasco
- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
- CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal
| | - Helena Soares
- Centro de Química Estrutural, Institute of Molecular Sciences, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
| |
Collapse
|
8
|
Anupama C, Shettar A, Ranganath SH, Srinivas SP. Experimental Oxidative Stress Breaks Down the Barrier Function of the Corneal Endothelium. J Ocul Pharmacol Ther 2023; 39:70-79. [PMID: 36346320 DOI: 10.1089/jop.2022.0093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Purpose: The fluid pump and barrier functions of the corneal endothelium maintain stromal deturgescence required for corneal transparency. The effect of oxidative stress, a hallmark of Fuchs endothelial corneal dystrophy (FECD), on the endothelial barrier function has been investigated. Methods: The endothelium of porcine corneas ex vivo was exposed to (1) membrane permeable oxidants (H2O2, 100 μM, 1 h; tert-butyl-hydroperoxide, 100 μM, 1 h), or (2) ultraviolet A (UVA) with photosensitizers for 15 min, riboflavin (50 μM) or tryptophan (Trp) (100 μM). The effects on the apical junction complex were analyzed by (1) immunostaining the perijunctional actomyosin ring (PAMR) and ZO-1 and (2) assessment of paracellular flux of fluorescein isothiocyanate (FITC)-avidin across cultured endothelial cells grown on biotinylated-gelatin film. The extent of oxidative stress was quantified by changes in intracellular reactive oxygen species (ROS) and mitochondrial membrane potential (MMP) in addition to lipid peroxidation and release of lactate dehydrogenase (LDH). Results: Both methods of oxidative stress led to the disruption of PAMR and ZO-1 concurrent with changes in ROS levels, depolarization of MMP, increased lipid peroxidation, elevated LDH release, and increased permeability of FITC-avidin. The effects of direct oxidants were opposed by SB-203580 [p38 mitogen-activating protein (MAP) kinase inhibitor; 10 μM]. The damage by UVA+photosensitizers was blocked by extracellular catalase (10,000 U/mL). Conclusions: (1) Acute oxidative stress breaks down the barrier function through destruction of PAMR in a p38 MAP kinase-dependent manner. (2) UVA+photosensitizers elicit the breakdown of PAMR via type I reactions, involving H2O2 release. (3) Blocking the oxidative stress prevents loss of barrier function, which could be helpful in the therapeutics of FECD.
Collapse
Affiliation(s)
- C Anupama
- Department of Biotechnology, Department of Chemical Engineering, Siddaganga Institute of Technology, Tumakuru, India.,Bio-INvENT Lab, Department of Chemical Engineering, Siddaganga Institute of Technology, Tumakuru, India
| | - Abhijith Shettar
- Department of Biotechnology, MS Ramaiah Institute of Technology, Bengaluru, India
| | - Sudhir H Ranganath
- Bio-INvENT Lab, Department of Chemical Engineering, Siddaganga Institute of Technology, Tumakuru, India
| | | |
Collapse
|
9
|
Thanuja MY, Ranganath SH, Srinivas SP. Role of Oxidative Stress in the Disruption of the Endothelial Apical Junctional Complex During Corneal Cold Storage. J Ocul Pharmacol Ther 2022; 38:664-681. [PMID: 36255463 DOI: 10.1089/jop.2022.0082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Purpose: To characterize the impact of corneal cold storage (CS) on the endothelial apical junctional complex (AJC). Methods: Porcine corneas were held in CS (4°C; 1-7 days) with Cornisol™ preservation medium supplemented with epothilone B (EpoB; microtubule stabilizer; 100 nM), SB-203580 (p38 mitogen-activated protein [MAP] kinase inhibitor; 20 μM), or antioxidants (quercetin, 100 μM; vitamin E, 1 mM; deferoxamine, an iron chelator, 10 mM). After CS termination, the damage to endothelial AJC was characterized by imaging perijunctional actomyosin ring (PAMR) and zonula occludens (ZO-1). The effects of EpoB and SB-203580 were characterized by imaging microtubules. The loss in the barrier function was assessed in cultured cells grown on biotin-coated gelatin by permeability to fluorescein isothiocyanate (FITC)-avidin. The accumulation of reactive oxygen species (ROS), altered mitochondrial membrane potential (MMP), lipid peroxidation, and lactate dehydrogenase (LDH) release were also determined in response to CS. Results: CS led to the loss of microtubules, destruction of PAMR, and breakdown of ZO-1 in the endothelium. The severity of damage increased when CS was prolonged. Although rewarming of the tissue increased the damage, the effect was marginal. CS also induced accumulation of ROS, alteration in MMP, lipid peroxidation, enhanced LDH release, and increased permeability to FITC-avidin. These changes were opposed by EpoB, SB-203580, and antioxidants. Conclusion: Corneal CS destroys AJC of the endothelium, leading to loss of its barrier function. The effects were surmounted by microtubule stabilization, p38 MAP kinase inhibition, and antioxidants. Thus, there is potential for reformulation of the preservation medium to maintain the health of the donor corneal endothelium before transplantation.
Collapse
Affiliation(s)
- M Y Thanuja
- Bio-INvENT Lab, Department of Chemical Engineering, Siddaganga Institute of Technology, Tumakuru, India
| | - Sudhir H Ranganath
- Bio-INvENT Lab, Department of Chemical Engineering, Siddaganga Institute of Technology, Tumakuru, India
| | | |
Collapse
|
10
|
Song JH, Mascarenhas JB, Sammani S, Kempf CL, Cai H, Camp SM, Bermudez T, Zhang DD, Natarajan V, Garcia JGN. TLR4 activation induces inflammatory vascular permeability via Dock1 targeting and NOX4 upregulation. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166562. [PMID: 36179995 DOI: 10.1016/j.bbadis.2022.166562] [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: 04/01/2022] [Revised: 08/30/2022] [Accepted: 09/22/2022] [Indexed: 11/17/2022]
Abstract
The loss of vascular integrity is a cardinal feature of acute inflammatory responses evoked by activation of the TLR4 inflammatory cascade. Utilizing in vitro and in vivo models of inflammatory lung injury, we explored TLR4-mediated dysregulated signaling that results in the loss of endothelial cell (EC) barrier integrity and vascular permeability, focusing on Dock1 and Elmo1 complexes that are intimately involved in regulation of Rac1 GTPase activity, a well recognized modulator of vascular integrity. Marked reductions in Dock1 and Elmo1 expression was observed in lung tissues (porcine, rat, mouse) exposed to TLR4 ligand-mediated acute inflammatory lung injury (LPS, eNAMPT) in combination with injurious mechanical ventilation. Lung tissue levels of Dock1 and Elmo1 were preserved in animals receiving an eNAMPT-neutralizing mAb in conjunction with highly significant decreases in alveolar edema and lung injury severity, consistent with Dock1/Elmo1 as pathologic TLR4 targets directly involved in inflammation-mediated loss of vascular barrier integrity. In vitro studies determined that pharmacologic inhibition of Dock1-mediated activation of Rac1 (TBOPP) significantly exacerbated TLR4 agonist-induced EC barrier dysfunction (LPS, eNAMPT) and attenuated increases in EC barrier integrity elicited by barrier-enhancing ligands of the S1P1 receptor (sphingosine-1-phosphate, Tysiponate). The EC barrier-disrupting influence of Dock1 inhibition on S1PR1 barrier regulation occurred in concert with: 1) suppressed formation of EC barrier-enhancing lamellipodia, 2) altered nmMLCK-mediated MLC2 phosphorylation, and 3) upregulation of NOX4 expression and increased ROS. These studies indicate that Dock1 is essential for maintaining EC junctional integrity and is a critical target in TLR4-mediated inflammatory lung injury.
Collapse
Affiliation(s)
- Jin H Song
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, United States of America
| | - Joseph B Mascarenhas
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, United States of America
| | - Saad Sammani
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, United States of America
| | - Carrie L Kempf
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, United States of America
| | - Hua Cai
- Department of Anesthesiology. University of California Los Angeles, Los Angeles, CA, United States of America
| | - Sara M Camp
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, United States of America
| | - Tadeo Bermudez
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, United States of America
| | - Donna D Zhang
- Department of Pharmacology and Toxicology, University of Arizona Health Sciences, Tucson, AZ, United States of America
| | - Viswanathan Natarajan
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Joe G N Garcia
- Department of Medicine, University of Arizona Health Sciences, Tucson, AZ, United States of America.
| |
Collapse
|
11
|
Liang P, Wang L, Yang S, Pan X, Li J, Zhang Y, Liang Y, Li J, Zhou B. 5-Methoxyflavone alleviates LPS-mediated lung injury by promoting Nrf2-mediated the suppression of NOX4/TLR4 axis in bronchial epithelial cells and M1 polarization in macrophages. J Inflamm (Lond) 2022; 19:24. [PMID: 36451220 PMCID: PMC9713965 DOI: 10.1186/s12950-022-00319-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 11/10/2022] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Acute lung injury (ALI) arises from sepsis or bacterial infection, which are life-threatening respiratory disorders that cause the leading cause of death worldwide. 5-Methoxyflavone, a methylated flavonoid, is gaining increased attention for its various health benefits. In the current study, we investigated the potential effects of 5-methoxyflavone against LPS-mediated ALI and elucidated the corresponding possible mechanism. METHODS A mouse model with ALI was established by intratracheal instillation of LPS, and lung pathological changes, signaling pathway related proteins and apoptosis in lung tissues were estimated by H&E staining, immunofluorescence and TUNEL assay, respectively. Cell viability was evaluated by MTT assay; protein levels of pro-inflammatory mediators were measured by ELISA assay; levels of ROS and M1 macrophage polarization were assayed by flow cytometry; the expression of Nrf2 signaling, NOX4/TLR4 axis and P-STAT1 were detected by western blotting. RESULTS Our results showed that 5-methoxyflavone treatment inhibited LPS-induced expression of NOX4 and TLR4 as well as the activation of downstream signaling (NF-κB and P38 MAPK), which was accompanied by markedly decreased ROS levels and pro-inflammatory cytokines (IL-6, TNF-α, MCP-1, and IL-8) in BEAS-2B cells. Moreover, we revealed that these effects of 5-methoxyflavone were related to its Nrf2 activating property, and blockade of Nrf2 prevented its inhibitory effects on NOX4/TLR4/NF-κB/P38 MAPK signaling, thus abrogating the anti-inflammatory effects of 5-methoxyflavone. Besides, the Nrf2 activating property of 5-methoxyflavone in RAW264.7 cells led to inhibition of LPS/IFN-γ-mediated STAT1 signaling, resulting in suppression of LPS/IFN-γ-induced M1 macrophage polarization and the repolarization of M2 macrophages to M1. In a mouse model of LPS-induced ALI, 5-methoxyflavone administration ameliorated LPS-mediated lung pathological changes, the increased lung index (lung/body weight ratio), and epithelial cell apoptosis. Meanwhile, we found 5-methoxyflavone effectively suppressed the hyperactive signaling pathways and the production of excessive pro-inflammatory mediators. Moreover, 5-methoxyflavone reduced LPS-mediated M1 macrophage polarization associated with elevated P-STAT1 activation in the lung tissues. In addition, 5-methoxyflavone improved the survival of LPS-challenged mice. CONCLUSION These results indicated that 5-methoxyflavone might be suitable for the development of a novel drug for ALI therapeutic.
Collapse
Affiliation(s)
- Panqiao Liang
- grid.478001.aCenter of Stem Cell and Regenerative Medicine, The People’s Hospital of Gaozhou, Gaozhou, 525200, China ,grid.410737.60000 0000 8653 1072Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, 511436 China
| | | | - Sushan Yang
- grid.478001.aDepartment of Clinical Laboratory, The People’s Hospital of Gaozhou, Gaozhou, 525200 China
| | | | - Jiashun Li
- grid.284723.80000 0000 8877 7471Department of Respiratory, Affiliated Huadu Hospital, Southern Medical University (People’s Hospital of Huadu District), Huadu, 510800 China
| | - Yuehan Zhang
- grid.478001.aCenter of Stem Cell and Regenerative Medicine, The People’s Hospital of Gaozhou, Gaozhou, 525200, China
| | - Yueyun Liang
- grid.478001.aDepartment of Anesthesiology, The People’s Hospital of Gaozhou, Gaozhou, 525200 China
| | - Jing Li
- State Key Laboratory of Respiratory Disease, National Clinical Research Center of Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China ,grid.410737.60000 0000 8653 1072Institute of Chinese Integrative Medicine, Guangzhou Medical University, Guangzhou, Guangdong China
| | - Beixian Zhou
- grid.478001.aCenter of Stem Cell and Regenerative Medicine, The People’s Hospital of Gaozhou, Gaozhou, 525200, China
| |
Collapse
|
12
|
Pérez-Cebrecos M, Prieto D, Blanco-Rayón E, Izagirre U, Ibarrola I. Differential tissue development compromising the growth rate and physiological performances of mussel. MARINE ENVIRONMENTAL RESEARCH 2022; 180:105725. [PMID: 35987041 DOI: 10.1016/j.marenvres.2022.105725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/27/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
Differences in the food acquisition rates and in the energetic costs of metabolism seem to affect the growth rate variability of mussels. The aim of this study was to analyze if the physiological performances responsible for such growth rate variability are accompanied by structural differences at tissue or cellular level in the main organs involved in energy acquisition (gill) and processing (digestive gland). Fast growers had higher cilia density and metabolic efficiency in their gill, and well-developed digestive tissue with barely no connective tissue or atrophy. Slow-growing mussels displayed stress signs that impede the proper acquisition, digestion and absorption of food: low cilia density, low mitochondrial capacity and high antioxidant activity levels in the gills, and high atrophy of the digestive gland. The data herein explains the growth rate variability of mussels, demonstrating that morphological and functional differences exist between fast and slow growers.
Collapse
Affiliation(s)
- Maitane Pérez-Cebrecos
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain; Research Centre for Experimental Marine Biology and Biotechnology (PiE - UPV/EHU), University of the Basque Country (UPV/EHU), Plentzia, Spain.
| | - Daniel Prieto
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Esther Blanco-Rayón
- Research Centre for Experimental Marine Biology and Biotechnology (PiE - UPV/EHU), University of the Basque Country (UPV/EHU), Plentzia, Spain; CBET Research Group, Department of Zoology and Animal Cell Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Urtzi Izagirre
- Research Centre for Experimental Marine Biology and Biotechnology (PiE - UPV/EHU), University of the Basque Country (UPV/EHU), Plentzia, Spain; CBET Research Group, Department of Zoology and Animal Cell Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Irrintzi Ibarrola
- Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| |
Collapse
|
13
|
Pinocembrin Relieves Mycoplasma pneumoniae Infection‑Induced Pneumonia in Mice Through the Inhibition of Oxidative Stress and Inflammatory Response. Appl Biochem Biotechnol 2022; 194:6335-6348. [PMID: 35917101 DOI: 10.1007/s12010-022-04081-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2022] [Indexed: 11/02/2022]
Abstract
Pneumonia is a serious infectious disease with increased morbidity and mortality worldwide. The M. pneumoniae is a major airway pathogen that mainly affects respiratory tract and ultimately leads to the development of pneumonia. The current exploration was aimed to uncover the beneficial properties of pinocembrin against the M. pneumoniae-triggered pneumonia in mice via its anti-inflammatory property. The pneumonia was stimulated to the BALB/c mice via infecting them with M. pneumoniae (100 µl) for 2 days through nasal drops and concomitantly treated with pinocembrin (10 mg/kg) for 3 days. The azithromycin (100 mg/kg) was used as a standard drug. Then the lung weight, nitric oxide, and myeloperoxidase (MPO) activity was assessed. The content of MDA, GSH, and SOD activity was scrutinized using kits. The total cells and DNA amount present in the bronchoalveolar lavage fluid (BALF) was assessed by standard methods. The IL-1, IL-6, IL-8, TNF-α, and TGF contents in the BALF samples and NF-κB level in the lung tissues were assessed using kits. The lung histopathology was assessed microscopically to detect the histological alterations. The 10 mg/kg of pinocembrin treatment substantially decreased the lung weight, nitric oxide (NO) level, and MPO activity. The MDA level was decreased, and GSH content and SOD activity were improved by the pinocembrin treatment. The pinocembrin administered pneumonia animals also demonstrated the decreased total cells, DNA amount, IL-1, IL-6, IL-8, TNF-α, and TGF in the BALF and NF-κB level. The findings of histological studies also witnessed the beneficial role of pinocembrin against M. pneumoniae-infected pneumonia. In conclusion, our findings confirmed that the pinocembrin effectively ameliorated the M. pneumoniae-provoked inflammation and oxidative stress in the pneumonia mice model. Hence, it could be a hopeful therapeutic agent to treat the pneumonia in the future.
Collapse
|
14
|
Therapeutic Validation of GEF-H1 Using a De Novo Designed Inhibitor in Models of Retinal Disease. Cells 2022; 11:cells11111733. [PMID: 35681428 PMCID: PMC9179336 DOI: 10.3390/cells11111733] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/19/2022] [Accepted: 05/21/2022] [Indexed: 02/05/2023] Open
Abstract
Inflammation and fibrosis are important components of diseases that contribute to the malfunction of epithelia and endothelia. The Rho guanine nucleotide exchange factor (GEF) GEF-H1/ARHGEF-2 is induced in disease and stimulates inflammatory and fibrotic processes, cell migration, and metastasis. Here, we have generated peptide inhibitors to block the function of GEF-H1. Inhibitors were designed using a structural in silico approach or by isolating an inhibitory sequence from the autoregulatory C-terminal domain. Candidate inhibitors were tested for their ability to block RhoA/GEF-H1 binding in vitro, and their potency and specificity in cell-based assays. Successful inhibitors were then evaluated in models of TGFβ-induced fibrosis, LPS-stimulated endothelial cell-cell junction disruption, and cell migration. Finally, the most potent inhibitor was successfully tested in an experimental retinal disease mouse model, in which it inhibited blood vessel leakage and ameliorated retinal inflammation when treatment was initiated after disease diagnosis. Thus, an antagonist that blocks GEF-H1 signaling effectively inhibits disease features in in vitro and in vivo disease models, demonstrating that GEF-H1 is an effective therapeutic target and establishing a new therapeutic approach.
Collapse
|
15
|
DNA damage assessment in pneumonia patients treated in the intensive care unit. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01050-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
16
|
Magalhaes-Novais S, Blecha J, Naraine R, Mikesova J, Abaffy P, Pecinova A, Milosevic M, Bohuslavova R, Prochazka J, Khan S, Novotna E, Sindelka R, Machan R, Dewerchin M, Vlcak E, Kalucka J, Stemberkova Hubackova S, Benda A, Goveia J, Mracek T, Barinka C, Carmeliet P, Neuzil J, Rohlenova K, Rohlena J. Mitochondrial respiration supports autophagy to provide stress resistance during quiescence. Autophagy 2022; 18:2409-2426. [PMID: 35258392 PMCID: PMC9542673 DOI: 10.1080/15548627.2022.2038898] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Mitochondrial oxidative phosphorylation (OXPHOS) generates ATP, but OXPHOS also supports biosynthesis during proliferation. In contrast, the role of OXPHOS during quiescence, beyond ATP production, is not well understood. Using mouse models of inducible OXPHOS deficiency in all cell types or specifically in the vascular endothelium that negligibly relies on OXPHOS-derived ATP, we show that selectively during quiescence OXPHOS provides oxidative stress resistance by supporting macroautophagy/autophagy. Mechanistically, OXPHOS constitutively generates low levels of endogenous ROS that induce autophagy via attenuation of ATG4B activity, which provides protection from ROS insult. Physiologically, the OXPHOS-autophagy system (i) protects healthy tissue from toxicity of ROS-based anticancer therapy, and (ii) provides ROS resistance in the endothelium, ameliorating systemic LPS-induced inflammation as well as inflammatory bowel disease. Hence, cells acquired mitochondria during evolution to profit from oxidative metabolism, but also built in an autophagy-based ROS-induced protective mechanism to guard against oxidative stress associated with OXPHOS function during quiescence. Abbreviations: AMPK: AMP-activated protein kinase; AOX: alternative oxidase; Baf A: bafilomycin A1; CI, respiratory complexes I; DCF-DA: 2′,7′-dichlordihydrofluorescein diacetate; DHE: dihydroethidium; DSS: dextran sodium sulfate; ΔΨmi: mitochondrial inner membrane potential; EdU: 5-ethynyl-2’-deoxyuridine; ETC: electron transport chain; FA: formaldehyde; HUVEC; human umbilical cord endothelial cells; IBD: inflammatory bowel disease; LC3B: microtubule associated protein 1 light chain 3 beta; LPS: lipopolysaccharide; MEFs: mouse embryonic fibroblasts; MTORC1: mechanistic target of rapamycin kinase complex 1; mtDNA: mitochondrial DNA; NAC: N-acetyl cysteine; OXPHOS: oxidative phosphorylation; PCs: proliferating cells; PE: phosphatidylethanolamine; PEITC: phenethyl isothiocyanate; QCs: quiescent cells; ROS: reactive oxygen species; PLA2: phospholipase A2, WB: western blot.
Collapse
Affiliation(s)
- Silvia Magalhaes-Novais
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic.,Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Blecha
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| | - Ravindra Naraine
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| | - Jana Mikesova
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| | - Pavel Abaffy
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| | - Alena Pecinova
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Mirko Milosevic
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic.,Faculty of Science, Charles University, Prague, Czech Republic
| | - Romana Bohuslavova
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| | - Jan Prochazka
- Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
| | - Shawez Khan
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Eliska Novotna
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic.,Faculty of Science, Charles University, Prague, Czech Republic
| | - Radek Sindelka
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| | - Radek Machan
- Faculty of Science, Charles University, Prague, Czech Republic
| | - Mieke Dewerchin
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Erik Vlcak
- Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
| | - Joanna Kalucka
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Aarhus Institute of Advanced Studies (AIAS), Aarhus University, Aarhus C, Denmark
| | - Sona Stemberkova Hubackova
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic.,Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Ales Benda
- Faculty of Science, Charles University, Prague, Czech Republic
| | - Jermaine Goveia
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Tomas Mracek
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Cyril Barinka
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| | - Peter Carmeliet
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, KU Leuven, Leuven, Belgium.,Department of Biomedicine, Aarhus University, Aarhus, Denmark.,State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, P. R. China
| | - Jiri Neuzil
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic.,School of Medical Science, Griffith University, Southport, Qld, Australia
| | - Katerina Rohlenova
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic.,VIB-KU Leuven Center for Cancer Biology, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Jakub Rohlena
- Institute of Biotechnology, Czech Academy of Sciences, BIOCEV, Vestec, Czech Republic
| |
Collapse
|
17
|
Systemic Effects of mitoTEMPO upon Lipopolysaccharide Challenge Are Due to Its Antioxidant Part, While Local Effects in the Lung Are Due to Triphenylphosphonium. Antioxidants (Basel) 2022; 11:antiox11020323. [PMID: 35204206 PMCID: PMC8868379 DOI: 10.3390/antiox11020323] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/30/2022] [Accepted: 02/03/2022] [Indexed: 01/08/2023] Open
Abstract
Mitochondria-targeted antioxidants (mtAOX) are a promising treatment strategy against reactive oxygen species-induced damage. Reports about harmful effects of mtAOX lead to the question of whether these could be caused by the carrier molecule triphenylphosphonium (TPP). The aim of this study was to investigate the biological effects of the mtAOX mitoTEMPO, and TPP in a rat model of systemic inflammatory response. The inflammatory response was induced by lipopolysaccharide (LPS) injection. We show that mitoTEMPO reduced expression of inducible nitric oxide synthase in the liver, lowered blood levels of tissue damage markers such as liver damage markers (aspartate aminotransferase and alanine aminotransferase), kidney damage markers (urea and creatinine), and the general organ damage marker, lactate dehydrogenase. In contrast, TPP slightly, but not significantly, increased the LPS-induced effects. Surprisingly, both mitoTEMPO and TPP reduced the wet/dry ratio in the lung after 24 h. In the isolated lung, both substances enhanced the increase in pulmonary arterial pressure induced by LPS observed within 3 h after LPS treatments but did not affect edema formation at this time. Our data suggest that beneficial effects of mitoTEMPO in organs are due to its antioxidant moiety (TEMPO), except for the lung where its effects are mediated by TPP.
Collapse
|
18
|
Morales-Tarré O, Alonso-Bastida R, Arcos-Encarnación B, Pérez-Martínez L, Encarnación-Guevara S. Protein lysine acetylation and its role in different human pathologies: a proteomic approach. Expert Rev Proteomics 2021; 18:949-975. [PMID: 34791964 DOI: 10.1080/14789450.2021.2007766] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Lysine acetylation is a reversible post-translational modification (PTM) regulated through the action of specific types of enzymes: lysine acetyltransferases (KATs) and lysine deacetylases (HDACs), in addition to bromodomains, which are a group of conserved domains which identify acetylated lysine residues, several of the players in the process of protein acetylation, including enzymes and bromodomain-containing proteins, have been related to the progression of several diseases. The combination of high-resolution mass spectrometry-based proteomics, and immunoprecipitation to enrich acetylated peptides has contributed in recent years to expand the knowledge about this PTM described initially in histones and nuclear proteins, and is currently reported in more than 5000 human proteins, that are regulated by this PTM. AREAS COVERED This review presents an overview of the main participant elements, the scenario in the development of protein lysine acetylation, and its role in different human pathologies. EXPERT OPINION Acetylation targets are practically all cellular processes in eukaryotes and prokaryotes organisms. Consequently, this modification has been linked to many pathologies like cancer, viral infection, obesity, diabetes, cardiovascular, and nervous system-associated diseases, to mention a few relevant examples. Accordingly, some intermediate mediators in the acetylation process have been projected as therapeutic targets.
Collapse
Affiliation(s)
- Orlando Morales-Tarré
- Laboratorio de Proteómica, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Ramiro Alonso-Bastida
- Laboratorio de Proteómica, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Bolivar Arcos-Encarnación
- Laboratorio de Neuroinmunobiología, Departamento de Medicina Molecular Y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Leonor Pérez-Martínez
- Laboratorio de Neuroinmunobiología, Departamento de Medicina Molecular Y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Sergio Encarnación-Guevara
- Laboratorio de Proteómica, Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| |
Collapse
|
19
|
Yuan J, Zhao Y, Bai Y, Gu J, Yuan Y, Liu X, Liu Z, Zou H, Bian J. Cadmium induces endosomal/lysosomal enlargement and blocks autophagy flux in rat hepatocytes by damaging microtubules. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 228:112993. [PMID: 34808507 DOI: 10.1016/j.ecoenv.2021.112993] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/31/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
Acute exposure to cadmium (Cd) causes vacuolar degeneration in buffalo rat liver 3 A (BRL 3 A) cells. The present study aimed to determine the relationship between Cd-induced microtubule damage and intracellular vacuolar degeneration. Western blotting results showed that Cd damaged the microtubule network and downregulated the expression of microtubule-associated proteins-kinesin-1 heavy chain (KIF5B), γ-tubulin, and acetylated α-tubulin in BRL 3 A cells. Immunofluorescence staining revealed that Cd inhibited interactions between α-tubulin and microtubule-associated protein 4 (MAP4) as well as KIF5B. Increasing Cd concentrations decreased the levels of the lipid kinase, PIKfyve, which regulates the activity of endosome-lysosome fission. Immunofluorescence and transmission electron microscopy revealed vacuole-like organelles that were late endosomes and lysosomes. The PIKfyve inhibitor, YM201636, and the microtubule depolymerizer, nocodazole, aggravated Cd-induced endosome-lysosome enlargement. Knocking down the kif5b gene that encodes KIF5B intensified the enlargement of endosome-lysosomes and expression of early endosome antigen 1 (EEA1), Ras-related protein Rab-7a (RAB7), and lysosome-associated membrane glycoprotein 2 (LAMP2). Nocodazole, YM201636, and the knockdown of kif5b blocked autophagic flux. We concluded that Cd-induced damage to the microtubule network is the main reason for endosome-lysosome enlargement and autophagic flux blockage in BRL 3 A cells, and kinesin-1 plays a critical role in this process.
Collapse
Affiliation(s)
- Junzhao Yuan
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, Jiangsu, China
| | - Yumeng Zhao
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China
| | - Yuni Bai
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China
| | - Jianhong Gu
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China
| | - Yan Yuan
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China
| | - Xuezhong Liu
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China
| | - Zongping Liu
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, Jiangsu, China
| | - Hui Zou
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, Jiangsu, China.
| | - Jianchun Bian
- College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou 225009, Jiangsu, China.
| |
Collapse
|
20
|
Karki P, Birukova AA. Microtubules as Major Regulators of Endothelial Function: Implication for Lung Injury. Front Physiol 2021; 12:758313. [PMID: 34777018 PMCID: PMC8582326 DOI: 10.3389/fphys.2021.758313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/06/2021] [Indexed: 01/04/2023] Open
Abstract
Endothelial dysfunction has been attributed as one of the major complications in COVID-19 patients, a global pandemic that has already caused over 4 million deaths worldwide. The dysfunction of endothelial barrier is characterized by an increase in endothelial permeability and inflammatory responses, and has even broader implications in the pathogenesis of acute respiratory syndromes such as ARDS, sepsis and chronic illnesses represented by pulmonary arterial hypertension and interstitial lung disease. The structural integrity of endothelial barrier is maintained by cytoskeleton elements, cell-substrate focal adhesion and adhesive cell junctions. Agonist-mediated changes in endothelial permeability are directly associated with reorganization of actomyosin cytoskeleton leading to cell contraction and opening of intercellular gaps or enhancement of cortical actin cytoskeleton associated with strengthening of endothelial barrier. The role of actin cytoskeleton remodeling in endothelial barrier regulation has taken the central stage, but the impact of microtubules in this process remains less explored and under-appreciated. This review will summarize the current knowledge on the crosstalk between microtubules dynamics and actin cytoskeleton remodeling, describe the signaling mechanisms mediating this crosstalk, discuss epigenetic regulation of microtubules stability and its nexus with endothelial barrier maintenance, and overview a role of microtubules in targeted delivery of signaling molecules regulating endothelial permeability and inflammation.
Collapse
Affiliation(s)
- Pratap Karki
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Anna A Birukova
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| |
Collapse
|
21
|
Antioxidant Properties of Hydrogen Gas Attenuates Oxidative Stress in Airway Epithelial Cells. Molecules 2021; 26:molecules26216375. [PMID: 34770784 PMCID: PMC8588133 DOI: 10.3390/molecules26216375] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/16/2021] [Accepted: 10/19/2021] [Indexed: 11/28/2022] Open
Abstract
Oxidative stress plays a crucial role in the development of airway diseases. Recently, hydrogen (H2) gas has been explored for its antioxidant properties. This study investigated the role of H2 gas in oxidative stress-induced alveolar and bronchial airway injury, where A549 and NCI-H292 cells were stimulated with hydrogen peroxide (H2O2) and lipopolysaccharide (LPS) in vitro. Results show that time-dependent administration of 2% H2 gas recovered the cells from oxidative stress. Various indicators including reactive oxygen species (ROS), nitric oxide (NO), antioxidant enzymes (catalase, glutathione peroxidase), intracellular calcium, and mitogen-activated protein kinase (MAPK) signaling pathway were examined to analyze the redox profile. The viability of A549 and NCI-H292 cells and the activity of antioxidant enzymes were reduced following induction by H2O2 and LPS but were later recovered using H2 gas. Additionally, the levels of oxidative stress markers, including ROS and NO, were elevated upon induction but were attenuated after treatment with H2 gas. Furthermore, H2 gas suppressed oxidative stress-induced MAPK activation and maintained calcium homeostasis. This study suggests that H2 gas can rescue airway epithelial cells from H2O2 and LPS-induced oxidative stress and may be a potential intervention for airway diseases.
Collapse
|
22
|
Li J, Fang Y, Wu D. Mechanical forces and metabolic changes cooperate to drive cellular memory and endothelial phenotypes. CURRENT TOPICS IN MEMBRANES 2021; 87:199-253. [PMID: 34696886 DOI: 10.1016/bs.ctm.2021.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Endothelial cells line the innermost layer of arterial, venous, and lymphatic vascular tree and accordingly are subject to hemodynamic, stretch, and stiffness mechanical forces. Normally quiescent, endothelial cells have a hemodynamic set point and become "activated" in response to disturbed hemodynamics, which may signal impending nutrient or gas depletion. Endothelial cells in the majority of tissue beds are normally inactivated and maintain vessel barrier functions, are anti-inflammatory, anti-coagulant, and anti-thrombotic. However, under aberrant mechanical forces, endothelial signaling transforms in response, resulting cellular changes that herald pathological diseases. Endothelial cell metabolism is now recognized as the primary intermediate pathway that undergirds cellular transformation. In this review, we discuss the various mechanical forces endothelial cells sense in the large vessels, microvasculature, and lymphatics, and how changes in environmental mechanical forces result in changes in metabolism, which ultimately influence cell physiology, cellular memory, and ultimately disease initiation and progression.
Collapse
Affiliation(s)
- Jin Li
- Committee on Molecular Metabolism and Nutrition, Biological Sciences Division, University of Chicago, Chicago, IL, United States; Department of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - Yun Fang
- Committee on Molecular Metabolism and Nutrition, Biological Sciences Division, University of Chicago, Chicago, IL, United States; Department of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - David Wu
- Committee on Molecular Metabolism and Nutrition, Biological Sciences Division, University of Chicago, Chicago, IL, United States; Department of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States.
| |
Collapse
|
23
|
Fu P, Epshtein Y, Ramchandran R, Mascarenhas JB, Cress AE, Jacobson J, Garcia JGN, Natarajan V. Essential role for paxillin tyrosine phosphorylation in LPS-induced mitochondrial fission, ROS generation and lung endothelial barrier loss. Sci Rep 2021; 11:17546. [PMID: 34475475 PMCID: PMC8413352 DOI: 10.1038/s41598-021-97006-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 08/12/2021] [Indexed: 11/09/2022] Open
Abstract
We have shown that both reactive oxygen species (ROS) and paxillin tyrosine phosphorylation regulate LPS-induced human lung endothelial permeability. Mitochondrial ROS (mtROS) is known to increase endothelial cell (EC) permeability which requires dynamic change in mitochondrial morphology, events that are likely to be regulated by paxillin. Here, we investigated the role of paxillin and its tyrosine phosphorylation in regulating LPS-induced mitochondrial dynamics, mtROS production and human lung microvascular EC (HLMVEC) dysfunction. LPS, in a time-dependent manner, induced higher levels of ROS generation in the mitochondria compared to cytoplasm or nucleus. Down-regulation of paxillin expression with siRNA or ecto-expression of paxillin Y31F or Y118F mutant plasmids attenuated LPS-induced mtROS in HLMVECs. Pre-treatment with MitoTEMPO, a scavenger of mtROS, attenuated LPS-induced mtROS, endothelial permeability and VE-cadherin phosphorylation. Further, LPS-induced mitochondrial fission in HLMVECs was attenuated by both a paxillin siRNA, and paxillin Y31F/Y118F mutant. LPS stimulated phosphorylation of dynamin-related protein (DRP1) at S616, which was also attenuated by paxillin siRNA, and paxillinY31/Y118 mutants. Inhibition of DRP1 phosphorylation by P110 attenuated LPS-induced mtROS and endothelial permeability. LPS challenge of HLMVECs enhanced interaction between paxillin, ERK, and DRP1, and inhibition of ERK1/2 activation with PD98059 blocked mitochondrial fission. Taken together, these results suggest a key role for paxillin tyrosine phosphorylation in LPS-induced mitochondrial fission, mtROS generation and EC barrier dysfunction.
Collapse
Affiliation(s)
- Panfeng Fu
- Department of Pharmacology, University of Illinois at Chicago, COMRB Room # 3137, 909, South Wolcott Avenue, Chicago, IL, 60612, USA. .,The Affiliated Hospital of Medical School, Medical School of Ningbo University, 247 Renmin Road, Ningbo, China.
| | - Yulia Epshtein
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Ramaswamy Ramchandran
- Department of Pharmacology, University of Illinois at Chicago, COMRB Room # 3137, 909, South Wolcott Avenue, Chicago, IL, 60612, USA
| | - Joseph B Mascarenhas
- Department of Medicine, College of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | - Anne E Cress
- Departments of Cellular and Molecular Medicine, University of Arizona Health Sciences, Tucson, AZ, USA.,Department of Medicine, College of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | - Jeffrey Jacobson
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Joe G N Garcia
- Department of Medicine, College of Medicine, University of Arizona Health Sciences, Tucson, AZ, USA
| | - Viswanathan Natarajan
- Department of Pharmacology, University of Illinois at Chicago, COMRB Room # 3137, 909, South Wolcott Avenue, Chicago, IL, 60612, USA. .,Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
| |
Collapse
|
24
|
Akhter MS, Barabutis N. Suppression of reactive oxygen species in endothelial cells by an antagonist of growth hormone-releasing hormone. J Biochem Mol Toxicol 2021; 35:e22879. [PMID: 34369038 DOI: 10.1002/jbt.22879] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/16/2021] [Accepted: 07/29/2021] [Indexed: 12/19/2022]
Abstract
Growth hormone-releasing hormone (GHRH) is a hypothalamic hormone, which regulates the secretion of growth hormone (GH) from the anterior pituitary gland. The effects of GHRH extend beyond the GH-insulin-like growth factor I axis, and that neuropeptide has been involved in the potentiation of several malignancies and other inflammatory disorders. The development of GHRH antagonists (GHRHAnt) delivers an exciting possibility to counteract the pathogenesis of the GHRH-related effects in human pathophysiology, especially when considered that GHRHAnt support endothelial barrier integrity. Those GHRHAnt-mediated effects are exerted at least in part due to the suppression of major inflammatory pathways, and the modulation of major cytoskeletal components. In the present study, we measured the production of reactive oxygen species (ROS) in bovine pulmonary artery endothelial cells, human cerebral microvascular endothelial cells, and human lung microvascular endothelial cells exposed to GHRH or a commercially available GHRHAnt. Our findings reveal the antioxidative effects of GHRHAnt in all three cell lines, which express GHRH receptors. The redox status of NIH/3T3 cells, which do not produce GHRH receptors, was not significantly affected by GHRH or GHRHAnt. Hence, the application of GHRHAnt in pathologies related to increased ROS production should be further investigated.
Collapse
Affiliation(s)
- Mohammad S Akhter
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| | - Nektarios Barabutis
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA
| |
Collapse
|
25
|
Goldblum RR, McClellan M, White K, Gonzalez SJ, Thompson BR, Vang HX, Cohen H, Higgins L, Markowski TW, Yang TY, Metzger JM, Gardner MK. Oxidative stress pathogenically remodels the cardiac myocyte cytoskeleton via structural alterations to the microtubule lattice. Dev Cell 2021; 56:2252-2266.e6. [PMID: 34343476 DOI: 10.1016/j.devcel.2021.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 04/07/2021] [Accepted: 07/09/2021] [Indexed: 11/19/2022]
Abstract
In the failing heart, the cardiac myocyte microtubule network is remodeled, which contributes to cellular contractile failure and patient death. However, the origins of this deleterious cytoskeletal reorganization are unknown. We now find that oxidative stress, a condition characteristic of heart failure, leads to cysteine oxidation of microtubules. Our electron and fluorescence microscopy experiments revealed regions of structural damage within the microtubule lattice that occurred at locations of oxidized tubulin. The incorporation of GTP-tubulin into these damaged, oxidized regions led to stabilized "hot spots" within the microtubule lattice, which suppressed the shortening of dynamic microtubules. Thus, oxidative stress may act inside of cardiac myocytes to facilitate a pathogenic shift from a sparse microtubule network into a dense, aligned network. Our results demonstrate how a disease condition characterized by oxidative stress can trigger a molecular oxidation event, which likely contributes to a toxic cellular-scale transformation of the cardiac myocyte microtubule network.
Collapse
Affiliation(s)
- Rebecca R Goldblum
- Medical Scientist Training Program, University of Minnesota, Minneapolis, MN, USA; Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Mark McClellan
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN, USA
| | - Kyle White
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN, USA
| | - Samuel J Gonzalez
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN, USA
| | - Brian R Thompson
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Hluechy X Vang
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Houda Cohen
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - LeeAnn Higgins
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Todd W Markowski
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Tzu-Yi Yang
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Joseph M Metzger
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Melissa K Gardner
- Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN, USA.
| |
Collapse
|
26
|
Yaqinuddin A, Ambia AR, Alaujan RA. Immunomodulatory Effects of Vitamin D and Vitamin C to Improve Immunity in COVID-19 Patients. JOURNAL OF HEALTH AND ALLIED SCIENCES NU 2021. [DOI: 10.1055/s-0041-1730084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AbstractSevere acute respiratory syndrome coronavirus 2 (SARS-COV2) infection causes life-threatening respiratory illness, which has caused significant mortality and morbidity around the globe. Coronavirus disease 2019 (COVID-19) causes mild respiratory illness in most infected individuals; however, in some patients it may progress to sepsis, acute respiratory distress syndrome (ARDS), cytokine release syndrome (CRS), and multiorgan dysfunction (MODS), which results in intensive care unit (ICU) admissions and increased fatalities. Recent evidence shows that most of these comorbidities associated with COVID-19 infection are associated with dysregulation of the host immune response. Vitamins C and D have been shown to regulate immune response by decreasing the proinflammatory cytokine release from immune cells and inducing proliferation of other immune cells to robustly fight infection. This review critically evaluates the current literature on vitamins C and D in modulating an immune response in different diseases and their potential therapeutic effects in preventing complications in COVID-19 infection.
Collapse
Affiliation(s)
- Ahmed Yaqinuddin
- Department of Anatomy and Genetics, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Ayesha Rahman Ambia
- Department of Anatomy and Genetics, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Raghad A. Alaujan
- Department of Anatomy and Genetics, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| |
Collapse
|
27
|
Karki P, Cha B, Zhang CO, Li Y, Ke Y, Promnares K, Kaibuchi K, Yoshimura A, Birukov KG, Birukova AA. Microtubule-dependent mechanism of anti-inflammatory effect of SOCS1 in endothelial dysfunction and lung injury. FASEB J 2021; 35:e21388. [PMID: 33724556 PMCID: PMC10069762 DOI: 10.1096/fj.202001477rr] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 12/21/2020] [Accepted: 01/07/2021] [Indexed: 12/15/2022]
Abstract
Suppressors of cytokine signaling (SOCS) provide negative regulation of inflammatory reaction. The role and precise cellular mechanisms of SOCS1 in control of endothelial dysfunction and barrier compromise associated with acute lung injury remain unexplored. Our results show that siRNA-mediated SOCS1 knockdown augmented lipopolysaccharide (LPS)-induced pulmonary endothelial cell (EC) permeability and enhanced inflammatory response. Consistent with in vitro data, EC-specific SOCS1 knockout mice developed more severe lung vascular leak and accumulation of inflammatory cells in bronchoalveolar lavage fluid. SOCS1 overexpression exhibited protective effects against LPS-induced endothelial permeability and inflammation, which were dependent on microtubule (MT) integrity. Biochemical and image analysis of unstimulated EC showed SOCS1 association with the MT, while challenge with LPS or MT depolymerizing agent colchicine impaired this association. SOCS1 directly interacted with N2 domains of MT-associated proteins CLIP-170 and CLASP2. Furthermore, N-terminal region of SOCS1 was indispensable for these interactions and SOCS1-ΔN mutant lacking N-terminal 59 amino acids failed to rescue LPS-induced endothelial dysfunction. Depletion of endogenous CLIP-170 or CLASP2 abolished SOCS1 interaction with Toll-like receptor-4 and Janus kinase-2 leading to impairment of SOCS1 inhibitory effects on LPS-induced inflammation. Altogether, these findings suggest that endothelial barrier protective and anti-inflammatory effects of SOCS1 are critically dependent on its targeting to the MT.
Collapse
Affiliation(s)
- Pratap Karki
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Boyoung Cha
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Chen-Ou Zhang
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Yue Li
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Yunbo Ke
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kamoltip Promnares
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kozo Kaibuchi
- Department of Cell Pharmacology, Nagoya University, Nagoya, Japan
| | - Akihiko Yoshimura
- Department of Microbiology and Immunology, Keio University, Tokyo, Japan
| | - Konstantin G Birukov
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Anna A Birukova
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| |
Collapse
|
28
|
Zheng L, Fei J, Feng CM, Xu Z, Fu L, Zhao H. Serum 8-iso-PGF2α Predicts the Severity and Prognosis in Patients With Community-Acquired Pneumonia: A Retrospective Cohort Study. Front Med (Lausanne) 2021; 8:633442. [PMID: 33869248 PMCID: PMC8044775 DOI: 10.3389/fmed.2021.633442] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 03/04/2021] [Indexed: 01/02/2023] Open
Abstract
Background: Many studies have identified the important role of 8-isoprostane (8-iso-PGF2α) in pulmonary diseases. However, the role of 8-iso-PGF2α in community-acquired pneumonia (CAP) remains unclear. Therefore, the main goal was to investigate the correlations of serum 8-iso-PGF2α with the severity and prognosis in CAP patients through a hospital-based retrospective cohort study. Methods: All 220 patients with CAP were enrolled. Demographic information and clinical data were collected. Levels of 8-iso-PGF2α and inflammatory cytokines were detected in serum using ELISA. Results: The levels of 8-iso-PGF2α were gradually increased in parallel with the CAP severity scores. Univariate and multivariate logistic regression analyses revealed a positive association between serum 8-iso-PGF2α and the CAP severity scores. Additionally, serum 8-iso-PGF2α levels were positively correlated with circulating inflammatory cytokines (CRP and TNFα). Serum 8-iso-PGF2α levels were increased in the patients with a longer hospital stay than those with a shorter hospital stay. Additionally, 20 patients died after hospitalization. Dead patients presented a higher serum 8-iso-PGF2α than surviving patients. A subsequent survival analysis revealed that higher serum 8-iso-PGF2α levels positively correlated with the risk of death in patients with CAP. Conclusions: Serum 8-iso-PGF2α levels on admission are positively associated with the severity of CAP patients. Elevated serum 8-iso-PGF2α on admission prolongs hospital stay and increases the risk of death in patients with CAP, indicating that 8-iso-PGF2α may be involved in the progression of CAP and serve as an early serum prognostic biomarker for CAP.
Collapse
Affiliation(s)
- Ling Zheng
- Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jun Fei
- Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chun-Mei Feng
- Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zheng Xu
- Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Lin Fu
- Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China.,Department of Toxicology of Anhui Medical University, Hefei, China
| | - Hui Zhao
- Respiratory and Critical Care Medicine, Second Affiliated Hospital of Anhui Medical University, Hefei, China
| |
Collapse
|
29
|
Pan W, Nagpal K, Suárez-Fueyo A, Ferretti A, Yoshida N, Tsokos MG, Tsokos GC. The Regulatory Subunit PPP2R2A of PP2A Enhances Th1 and Th17 Differentiation through Activation of the GEF-H1/RhoA/ROCK Signaling Pathway. THE JOURNAL OF IMMUNOLOGY 2021; 206:1719-1728. [PMID: 33762326 DOI: 10.4049/jimmunol.2001266] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 02/04/2021] [Indexed: 01/04/2023]
Abstract
Protein phosphatase 2A (PP2A) composed of a scaffold subunit, a catalytic subunit, and multiple regulatory subunits is a ubiquitously expressed serine/threonine phosphatase. We have previously shown that the PP2A catalytic subunit is increased in T cells from patients with systemic lupus erythematosus and promotes IL-17 production by enhancing the activity of Rho-associated kinase (ROCK) in T cells. However, the molecular mechanism whereby PP2A regulates ROCK activity is unknown. In this study, we show that the PP2A regulatory subunit PPP2R2A is increased in T cells from people with systemic lupus erythematosus and binds to, dephosphorylates, and activates the guanine nucleotide exchange factor GEF-H1 at Ser885, which in turn increases the levels of RhoA-GTP and the activity of ROCK in T cells. Genetic PPP2R2A deficiency in murine T cells reduced Th1 and Th17, but not regulatory T cell differentiation and mice with T cell-specific PPP2R2A deficiency displayed less autoimmunity when immunized with myelin oligodendrocyte glycoprotein peptide. Our studies indicate that PPP2R2A is the regulatory subunit that dictates the PP2A-directed enhanced Th1 and Th17 differentiation, and therefore, it represents a therapeutic target for pathologies linked to Th1 and Th17 cell expansion.
Collapse
Affiliation(s)
- Wenliang Pan
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Kamalpreet Nagpal
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Abel Suárez-Fueyo
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Andrew Ferretti
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Nobuya Yoshida
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - Maria G Tsokos
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| | - George C Tsokos
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215
| |
Collapse
|
30
|
Zhang Q, Wang Y, Qu D, Yu J, Yang J. Role of HDAC6 inhibition in sepsis-induced acute respiratory distress syndrome (Review). Exp Ther Med 2021; 21:422. [PMID: 33747162 DOI: 10.3892/etm.2021.9866] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 02/01/2021] [Indexed: 12/12/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS) induced by sepsis contributes remarkably to the high mortality rate observed in intensive care units, largely due to a lack of effective drug therapies. Histone deacetylase 6 (HDAC6) is a class-IIb deacetylase that modulates non-nuclear protein functions via deacetylation and ubiquitination. Importantly, HDAC6 has been shown to exert anti-cancer, anti-neurodegeneration, and immunological effects, and several HDAC6 inhibitors have now entered clinical trials. It has also been recently shown to modulate inflammation, and HDAC6 inhibition has been demonstrated to markedly suppress experimental sepsis. The present review summarizes the role of HDAC6 in sepsis-induced inflammation and endothelial barrier dysfunction in recent years. It is proposed that HDAC6 inhibition predominantly ameliorates sepsis-induced ARDS by directly attenuating inflammation, which modulates the innate and adaptive immunity, transcription of pro-inflammatory genes, and protects endothelial barrier function. HDAC6 inhibition protects against sepsis-induced ARDS, thereby making HDAC6 a promising therapeutic target. However, HDAC inhibition may be associated with adverse effects on the embryo sac and oocyte, necessitating further studies.
Collapse
Affiliation(s)
- Qinghua Zhang
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - Yan Wang
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - Danhua Qu
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - Jinyan Yu
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - Junling Yang
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| |
Collapse
|
31
|
Karki P, Ke Y, Zhang CO, Li Y, Tian Y, Son S, Yoshimura A, Kaibuchi K, Birukov KG, Birukova AA. SOCS3-microtubule interaction via CLIP-170 and CLASP2 is critical for modulation of endothelial inflammation and lung injury. J Biol Chem 2021; 296:100239. [PMID: 33372035 PMCID: PMC7949054 DOI: 10.1074/jbc.ra120.014232] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 11/23/2020] [Accepted: 12/28/2020] [Indexed: 12/12/2022] Open
Abstract
Proinflammatory cytokines such as IL-6 induce endothelial cell (EC) barrier disruption and trigger an inflammatory response in part by activating the Janus kinase-signal transducer and activator of transcription (JAK-STAT) pathway. The protein suppressor of cytokine signaling-3 (SOCS3) is a negative regulator of JAK-STAT, but its role in modulation of lung EC barrier dysfunction caused by bacterial pathogens has not been investigated. Using human lung ECs and EC-specific SOCS3 knockout mice, we tested the hypothesis that SOCS3 confers microtubule (MT)-mediated protection against endothelial dysfunction. SOCS3 knockdown in cultured ECs or EC-specific SOCS3 knockout in mice resulted in exacerbated lung injury characterized by increased permeability and inflammation in response to IL-6 or heat-killed Staphylococcus aureus (HKSA). Ectopic expression of SOCS3 attenuated HKSA-induced EC dysfunction, and this effect required assembled MTs. SOCS3 was enriched in the MT fractions, and treatment with HKSA disrupted SOCS3-MT association. We discovered that-in addition to its known partners gp130 and JAK2-SOCS3 interacts with MT plus-end binding proteins CLIP-170 and CLASP2 via its N-terminal domain. The resulting SOCS3-CLIP-170/CLASP2 complex was essential for maximal SOCS3 anti-inflammatory effects. Both IL-6 and HKSA promoted MT disassembly and disrupted SOCS3 interaction with CLIP-170 and CLASP2. Moreover, knockdown of CLIP-170 or CLASP2 impaired SOCS3-JAK2 interaction and abolished the anti-inflammatory effects of SOCS3. Together, these findings demonstrate for the first time an interaction between SOCS3 and CLIP-170/CLASP2 and reveal that this interaction is essential to the protective effects of SOCS3 in lung endothelium.
Collapse
Affiliation(s)
- Pratap Karki
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Yunbo Ke
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Chen-Ou Zhang
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Yue Li
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Yufeng Tian
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Sophia Son
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Akihiko Yoshimura
- Department of Microbiology and Immunology, Keio University, Tokyo, Japan
| | - Kozo Kaibuchi
- Department of Cell Pharmacology, Nagoya University, Nagoya, Japan
| | - Konstantin G Birukov
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Anna A Birukova
- Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA.
| |
Collapse
|
32
|
Zhang DW, Wei YY, Ji S, Fei GH. Correlation between sestrin2 expression and airway remodeling in COPD. BMC Pulm Med 2020; 20:297. [PMID: 33198738 PMCID: PMC7667887 DOI: 10.1186/s12890-020-01329-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/28/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Airway remodeling is a major pathological characteristic of chronic obstructive pulmonary disease (COPD), and has been shown to be associated with oxidative stress. Sestrin2 has recently drawn attention as an important antioxidant protein. However, the underlying correlation between sestrin2 and airway remodeling in COPD has yet to be clarified. METHODS A total of 124 subjects were enrolled in this study, including 62 control subjects and 62 COPD patients. The pathological changes in airway tissues were assessed by different staining methods. The expression of sestrin2 and matrix metalloproteinase 9 (MMP9) in airway tissues was monitored by immunohistochemistry. Enzyme-linked immunosorbent assays (ELISAs) were used to detect the serum concentrations of sestrin2 and MMP9. The airway parameters on computed tomography (CT) from all participants were measured for evaluating airway remodeling. The relationship between serum sestrin2 and MMP9 concentration and airway parameters in chest CT was also analyzed. RESULTS In patients with COPD, staining of airway structures showed distinct pathological changes of remodeling, including cilia cluttered, subepithelial fibrosis, and reticular basement membrane (Rbm) fragmentation. Compared with control subjects, the expression of sestrin2 and MMP9 was significantly increased in both human airway tissues and serum. Typical imaging characteristics of airway remodeling and increased airway parameters were also found by chest CT. Additionally, serum sestrin2 concentration was positively correlated with serum MMP9 concentration and airway parameters in chest CT. CONCLUSION Increased expression of sestrin2 is related to airway remodeling in COPD. We demonstrated for the first time that sestrin2 may be a novel biomarker for airway remodeling in patients with COPD.
Collapse
Affiliation(s)
- Da-Wei Zhang
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, People's Republic of China
- Key Laboratory of Respiratory Diseases Research and Medical Transformation of Anhui Province, Hefei, 230022, Anhui Province, People's Republic of China
| | - Yuan-Yuan Wei
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, People's Republic of China
- Key Laboratory of Respiratory Diseases Research and Medical Transformation of Anhui Province, Hefei, 230022, Anhui Province, People's Republic of China
| | - Shuang Ji
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, People's Republic of China
- Key Laboratory of Respiratory Diseases Research and Medical Transformation of Anhui Province, Hefei, 230022, Anhui Province, People's Republic of China
| | - Guang-He Fei
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, People's Republic of China.
- Key Laboratory of Respiratory Diseases Research and Medical Transformation of Anhui Province, Hefei, 230022, Anhui Province, People's Republic of China.
| |
Collapse
|
33
|
RAC1 nitration at Y 32 IS involved in the endothelial barrier disruption associated with lipopolysaccharide-mediated acute lung injury. Redox Biol 2020; 38:101794. [PMID: 33248422 PMCID: PMC7664366 DOI: 10.1016/j.redox.2020.101794] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 11/06/2020] [Accepted: 11/07/2020] [Indexed: 02/06/2023] Open
Abstract
Acute lung injury (ALI), a devastating illness induced by systemic inflammation e.g., sepsis or local lung inflammation e.g., COVID-19 mediated severe pneumonia, has an unacceptably high mortality and has no effective therapy. ALI is associated with increased pulmonary microvascular hyperpermeability and alveolar flooding. The small Rho GTPases, RhoA and Rac1 are central regulators of vascular permeability through cytoskeleton rearrangements. RhoA and Rac1 have opposing functional outcome: RhoA induces an endothelial contractile phenotype and barrier disruption, while Rac1 stabilizes endothelial junctions and increases barrier integrity. In ALI, RhoA activity is increased while Rac1 activity is reduced. We have shown that the activation of RhoA in lipopolysaccharide (LPS)-mediated ALI, is dependent, at least in part, on a single nitration event at tyrosine (Y)34. Thus, the purpose of this study was to determine if the inhibition of Rac1 is also dependent on its nitration. Our data show that Rac1 inhibition by LPS is associated with its nitration that mass spectrometry identified as Y32, within the switch I region adjacent to the nucleotide-binding site. Using a molecular modeling approach, we designed a nitration shielding peptide for Rac1, designated NipR2 (nitration inhibitor peptide for the Rho GTPases 2), which attenuated the LPS-induced nitration of Rac1 at Y32, preserves Rac1 activity and attenuates the LPS-mediated disruption of the endothelial barrier in human lung microvascular endothelial cells (HLMVEC). Using a murine model of ALI induced by intratracheal installation of LPS we found that NipR2 successfully prevented Rac1 nitration and Rac1 inhibition, and more importantly attenuated pulmonary inflammation, reduced lung injury and prevented the loss of lung function. Together, our data identify a new post-translational mechanism of Rac1 inhibition through its nitration at Y32. As NipR2 also reduces sepsis induced ALI in the mouse lung, we conclude that Rac1 nitration is a therapeutic target in ALI. Endotoxin exposure induces site specific nitration of Rac1 at Y32 via peroxynitrite stress. Rac1 nitration at Y32 leads to persistent Rac GTPase inhibition and endothelial barrier disruption. Novel Rac1 nitration shielding peptide, NipR2 blocks Rac1 nitration and rescues endotoxin induced lung inflammation. NipR2 is potentially an effective therapy for sepsis induced lung injury by targeting Rac1 Y32 nitration.
Collapse
|
34
|
Potential role of polycyclic aromatic hydrocarbons in air pollution-induced non-malignant respiratory diseases. Respir Res 2020; 21:299. [PMID: 33187512 PMCID: PMC7666487 DOI: 10.1186/s12931-020-01563-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 11/01/2020] [Indexed: 12/12/2022] Open
Abstract
Epidemiological studies have found strong associations between air pollution and respiratory effects including development and/or exacerbation of asthma and chronic obstructive pulmonary disease (COPD) as well as increased occurrence of respiratory infections and lung cancer. It has become increasingly clear that also polycyclic aromatic hydrocarbons (PAHs) may affect processes linked to non-malignant diseases in the airways. The aim of the present paper was to review epidemiological studies on associations between gas phase and particle-bound PAHs in ambient air and non-malignant respiratory diseases or closely related physiological processes, to assess whether PAH-exposure may explain some of the effects associated with air pollution. Based on experimental in vivo and in vitro studies, we also explore possible mechanisms for how different PAHs may contribute to such events. Epidemiological studies show strongest evidence for an association between PAHs and asthma development and respiratory function in children. This is supported by studies on prenatal and postnatal exposure. Exposure to PAHs in adults seems to be linked to respiratory functions, exacerbation of asthma and increased morbidity/mortality of obstructive lung diseases. However, available studies are few and weak. Notably, the PAHs measured in plasma/urine also represent other exposure routes than inhalation. Furthermore, the role of PAHs measured in air is difficult to disentangle from that of other air pollution components originating from combustion processes. Experimental studies show that PAHs may trigger various processes linked to non-malignant respiratory diseases. Physiological- and pathological responses include redox imbalance, oxidative stress, inflammation both from the innate and adaptive immune systems, smooth muscle constriction, epithelial- and endothelial dysfunction and dysregulated lung development. Such biological responses may at the molecular level be initiated by PAH-binding to the aryl hydrocarbon receptor (AhR), but possibly also through interactions with beta-adrenergic receptors. In addition, reactive PAH metabolites or reactive oxygen species (ROS) may interfere directly with ion transporters and enzymes involved in signal transduction. Overall, the reviewed literature shows that respiratory effects of PAH-exposure in ambient air may extend beyond lung cancer. The relative importance of the specific PAHs ability to induce disease may differ between the biological endpoint in question.
Collapse
|
35
|
Joo E, Olson MF. Regulation and functions of the RhoA regulatory guanine nucleotide exchange factor GEF-H1. Small GTPases 2020; 12:358-371. [PMID: 33126816 PMCID: PMC8583009 DOI: 10.1080/21541248.2020.1840889] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Since the discovery by Madaule and Axel in 1985 of the first Ras homologue (Rho) protein in Aplysia and its human orthologue RhoB, membership in the Rho GTPase family has grown to 20 proteins, with representatives in all eukaryotic species. These GTPases are molecular switches that cycle between active (GTP bound) and inactivate (GDP bound) states. The exchange of GDP for GTP on Rho GTPases is facilitated by guanine exchange factors (GEFs). Approximately 80 Rho GEFs have been identified to date, and only a few GEFs associate with microtubules. The guanine nucleotide exchange factor H1, GEF-H1, is a unique GEF that associates with microtubules and is regulated by the polymerization state of microtubule networks. This review summarizes the regulation and functions of GEF-H1 and discusses the roles of GEF-H1 in human diseases.
Collapse
Affiliation(s)
- Emily Joo
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
| | - Michael F Olson
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
| |
Collapse
|
36
|
Liu F, Zhu Y, Zhang J, Li Y, Peng Z. Intravenous high-dose vitamin C for the treatment of severe COVID-19: study protocol for a multicentre randomised controlled trial. BMJ Open 2020; 10:e039519. [PMID: 32641343 PMCID: PMC7348463 DOI: 10.1136/bmjopen-2020-039519] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/23/2020] [Accepted: 06/25/2020] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION The rapid worldwide spread of COVID-19 has caused a global health crisis. To date, symptomatic supportive care has been the most common treatment. It has been reported that the mechanism of COVID-19 is related to cytokine storms and subsequent immunogenic damage, especially damage to the endothelium and alveolar membrane. Vitamin C (VC), also known as L-ascorbic acid, has been shown to have antimicrobial and immunomodulatory properties. A high dose of intravenous VC (HIVC) was proven to block several key components of cytokine storms, and HIVC showed safety and varying degrees of efficacy in clinical trials conducted on patients with bacterial-induced sepsis and acute respiratory distress syndrome (ARDS). Therefore, we hypothesise that HIVC could be added to the treatment of ARDS and multiorgan dysfunction related to COVID-19. METHODS AND ANALYSIS The investigators designed a multicentre prospective randomised placebo-controlled trial that is planned to recruit 308 adults diagnosed with COVID-19 and transferred into the intensive care unit. Participants will randomly receive HIVC diluted in sterile water or placebo for 7 days once enrolled. Patients with a history of VC allergy, end-stage pulmonary disease, advanced malignancy or glucose-6-phosphate dehydrogenase deficiency will be excluded. The primary outcome is ventilation-free days within 28 observational days. This is one of the first clinical trials applying HIVC to treat COVID-19, and it will provide credible efficacy and safety data. We predict that HIVC could suppress cytokine storms caused by COVID-19, help improve pulmonary function and reduce the risk of ARDS of COVID-19. ETHICS AND DISSEMINATION The study protocol was approved by the Ethics Committee of Zhongnan Hospital of Wuhan University (identifiers: Clinical Ethical Approval No. 2020001). Findings of the trial will be disseminated through peer-reviewed journals and scientific conferences. TRIAL REGISTRATION NUMBER NCT04264533.
Collapse
Affiliation(s)
- Fang Liu
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Yuan Zhu
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Jing Zhang
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Yiming Li
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Zhiyong Peng
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| |
Collapse
|
37
|
Artificial Sweeteners Disrupt Tight Junctions and Barrier Function in the Intestinal Epithelium through Activation of the Sweet Taste Receptor, T1R3. Nutrients 2020; 12:nu12061862. [PMID: 32580504 PMCID: PMC7353258 DOI: 10.3390/nu12061862] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/18/2020] [Accepted: 06/20/2020] [Indexed: 12/20/2022] Open
Abstract
The breakdown of the intestinal epithelial barrier and subsequent increase in intestinal permeability can lead to systemic inflammatory diseases and multiple-organ failure. Nutrition impacts the intestinal barrier, with dietary components such as gluten increasing permeability. Artificial sweeteners are increasingly consumed by the general public in a range of foods and drinks. The sweet taste receptor (T1R3) is activated by artificial sweeteners and has been identified in the intestine to play a role in incretin release and glucose transport; however, T1R3 has not been previously linked to intestinal permeability. Here, the intestinal epithelial cell line, Caco-2, was used to study the effect of commonly-consumed artificial sweeteners, sucralose, aspartame and saccharin, on permeability. At high concentrations, aspartame and saccharin were found to induce apoptosis and cell death in intestinal epithelial cells, while at low concentrations, sucralose and aspartame increased epithelial barrier permeability and down-regulated claudin 3 at the cell surface. T1R3 knockdown was found to attenuate these effects of artificial sweeteners. Aspartame induced reactive oxygen species (ROS) production to cause permeability and claudin 3 internalization, while sweetener-induced permeability and oxidative stress was rescued by the overexpression of claudin 3. Taken together, our findings demonstrate that the artificial sweeteners sucralose, aspartame, and saccharin exert a range of negative effects on the intestinal epithelium through the sweet taste receptor T1R3.
Collapse
|
38
|
Leigh-de Rapper S, van Vuuren SF. Odoriferous Therapy: A Review Identifying Essential Oils against Pathogens of the Respiratory Tract. Chem Biodivers 2020; 17:e2000062. [PMID: 32207224 DOI: 10.1002/cbdv.202000062] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/20/2020] [Indexed: 01/01/2023]
Abstract
This review explores the body of scientific information available on the antimicrobial properties of essential oils against pathogens responsible for respiratory infections and critically compares this to what is recommended in the Layman's aroma-therapeutic literature. Essential oils are predominantly indicated for the treatment of respiratory infections caused by bacteria or viruses (total 79.0 %), the efficacy of which has not been confirmed through clinical trials. When used in combination, they are often blended for presumed holistic synergistic effects. Of the essential oils recommended, all show some degree of antioxidant activity, 50.0 % demonstrate anti-inflammatory effects and 83.3 % of the essential oils showed antihistaminic activity. Of the essential oils reviewed, 43.8 % are considered non-toxic while the remaining essential oils are considered slightly to moderately toxic (43.7 %) or the toxicity is unknown (12.5 %). Recommendations are made for further research into essential oil combinations.
Collapse
Affiliation(s)
- Stephanie Leigh-de Rapper
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa
| | - Sandy F van Vuuren
- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa
| |
Collapse
|
39
|
Lee SF, Harris R, Stout-Delgado HW. Targeted antioxidants as therapeutics for treatment of pneumonia in the elderly. Transl Res 2020; 220:43-56. [PMID: 32268130 PMCID: PMC7989851 DOI: 10.1016/j.trsl.2020.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/03/2020] [Accepted: 03/06/2020] [Indexed: 01/08/2023]
Abstract
Community acquired pneumonia is a leading cause of mortality in the United States. Along with predisposing comorbid health status, age is an independent risk factor for determining the outcome of pneumonia. Research over the last few decades has contributed to better understanding the underlying immunodysregulation and imbalanced redox homeostasis tied to this aged population group that increases susceptibility to a wide range of pathologies. Major approaches include targeting oxidative stress by reducing ROS generation at its main sources of production which includes the mitochondrion. Mitochondria-targeted antioxidants have a number of molecular strategies that include targeting the biophysical properties of mitochondria, mitochondrial localization of catalytic enzymes, and mitigating mitochondrial membrane potential. Results of several antioxidant studies both in vitro and in vivo have demonstrated promising potential as a therapeutic in the treatment of pneumonia in the elderly. More human studies will need to be conducted to evaluate its efficacy in this clinical setting.
Collapse
Affiliation(s)
- Stefi F Lee
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Weill Cornell Medicine, New York, New York
| | - Rebecca Harris
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Weill Cornell Medicine, New York, New York
| | - Heather W Stout-Delgado
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Weill Cornell Medicine, New York, New York.
| |
Collapse
|
40
|
Thomas G, Frederick E, Hausburg M, Goldberg L, Hoke M, Roshon M, Mains C, Bar-Or D. The novel immunomodulatory biologic LMWF5A for pharmacological attenuation of the "cytokine storm" in COVID-19 patients: a hypothesis. Patient Saf Surg 2020; 14:21. [PMID: 32431755 PMCID: PMC7220573 DOI: 10.1186/s13037-020-00248-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 05/06/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND A common complication of viral pulmonary infections, such as in the ongoing COVID-19 pandemic, is a phenomenon described as a "cytokine storm". While poorly defined, this hyperinflammatory response results in diffuse alveolar damage. The low molecular weight fraction of commercial human serum albumin (LMWF5A), a novel biologic in development for osteoarthritis, demonstrates beneficial in vitro immunomodulatory effects complimentary to addressing inflammation, thus, we hypothesize that LMWF5A could improve the clinical outcomes of COVID-19 by attenuating hyperinflammation and the potential development of a cytokine storm. PRESENTATION OF THE HYPOTHESIS A variety of human in vitro immune models indicate that LMWF5A reduces the production of pro-inflammatory cytokines implicated in cytokine storm associated with COVID-19. Furthermore, evidence suggests LMWF5A also promotes the production of mediators required for resolving inflammation and enhances the barrier function of endothelial cultures. TESTING THE HYPOTHESIS A randomized controlled trial, to evaluate the safety and efficacy of nebulized LMWF5A in adults with Acute Respiratory Distress Syndrome (ARDS) secondary to COVID-19 infection, was developed and is currently under review by the Food and Drug Administration. IMPLICATIONS OF HYPOTHESIS If successful, this therapy may attenuate the cytokine storm observed in these patients and potentially reduce mortality, increase ventilation free days, improve oxygenation parameters and consequently lessen the burden on patients and the intensive care unit. CONCLUSIONS In conclusion, in vitro findings suggest that the immunomodulatory effects of LMWF5A make it a viable candidate for treating cytokine storm and restoring homeostasis to the immune response in COVID-19.
Collapse
Affiliation(s)
- Gregory Thomas
- Ampio Pharmaceuticals, Inc, 373 Inverness Pkwy #200, Englewood, CO 80112 USA
| | - Elizabeth Frederick
- Ampio Pharmaceuticals, Inc, 373 Inverness Pkwy #200, Englewood, CO 80112 USA
| | - Melissa Hausburg
- Trauma Research Department, Swedish Medical Center, 501 E. Hampden, Englewood, CO 80113 USA
- Trauma Research Department, St. Anthony Hospital, 11600 W 2nd Pl, Lakewood, CO 80228 USA
- Trauma Research Department, Medical City Plano, 3901 W 15th St, Plano, TX 75075 USA
- Trauma Research Department, Penrose Hospital, 2222 N Nevada Ave, Colorado Springs, CO 80907 USA
- Trauma Research Department, Research Medical Center, 2316 E Meyer Blvd, Kansas City, MO 64132 USA
- Trauma Research Department, Wesley Medical Center, 550 N Hillside St, Wichita, KS 67214 USA
| | - Laura Goldberg
- Ampio Pharmaceuticals, Inc, 373 Inverness Pkwy #200, Englewood, CO 80112 USA
| | - Marshall Hoke
- Ampio Pharmaceuticals, Inc, 373 Inverness Pkwy #200, Englewood, CO 80112 USA
| | - Michael Roshon
- Emergency Department, Penrose Hospital, Colorado Springs, Colorado USA
| | | | - David Bar-Or
- Trauma Research Department, Swedish Medical Center, 501 E. Hampden, Englewood, CO 80113 USA
- Trauma Research Department, St. Anthony Hospital, 11600 W 2nd Pl, Lakewood, CO 80228 USA
- Trauma Research Department, Medical City Plano, 3901 W 15th St, Plano, TX 75075 USA
- Trauma Research Department, Penrose Hospital, 2222 N Nevada Ave, Colorado Springs, CO 80907 USA
- Trauma Research Department, Research Medical Center, 2316 E Meyer Blvd, Kansas City, MO 64132 USA
- Trauma Research Department, Wesley Medical Center, 550 N Hillside St, Wichita, KS 67214 USA
- Department of Molecular Biology, Rocky Vista University, 8401 S Chambers Rd, Parker, CO 80134 USA
- Swedish Medical Center, 501 E. Hampden Ave. Rm 4-454, Englewood, CO 80013 USA
| |
Collapse
|
41
|
Abedi F, Hayes AW, Reiter R, Karimi G. Acute lung injury: The therapeutic role of Rho kinase inhibitors. Pharmacol Res 2020; 155:104736. [PMID: 32135249 DOI: 10.1016/j.phrs.2020.104736] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 01/18/2020] [Accepted: 02/28/2020] [Indexed: 02/06/2023]
Abstract
Acute lung injury (ALI) is a pulmonary illness with high rates of mortality and morbidity. Rho GTPase and its downstream effector, Rho kinase (ROCK), have been demonstrated to be involved in cell adhesion, motility, and contraction which can play a role in ALI. The electronic databases of Google Scholar, Scopus, PubMed, and Web of Science were searched to obtain relevant studies regarding the role of the Rho/ROCK signaling pathway in the pathophysiology of ALI and the effects of specific Rho kinase inhibitors in prevention and treatment of ALI. Upregulation of the RhoA/ROCK signaling pathway causes an increase of inflammation, immune cell migration, apoptosis, coagulation, contraction, and cell adhesion in pulmonary endothelial cells. These effects are involved in endothelium barrier dysfunction and edema, hallmarks of ALI. These effects were significantly reversed by Rho kinase inhibitors. Rho kinase inhibition offers a promising approach in ALI [ARDS] treatment.
Collapse
Affiliation(s)
- Farshad Abedi
- Pharmaceutical Research Center, Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences, Mashhad, Iran
| | - A Wallace Hayes
- University of South Florida, Tampa, FL, USA; Michigan State University, East Lansing, MI, USA
| | - Russel Reiter
- University of Texas, Health Science Center at San Antonio, Department of Cellular and Structural Biology, USA
| | - Gholamreza Karimi
- Pharmaceutical Research Center, Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
| |
Collapse
|
42
|
Elko EA, Cunniff B, Seward DJ, Chia SB, Aboushousha R, van de Wetering C, van der Velden J, Manuel A, Shukla A, Heintz NH, Anathy V, van der Vliet A, Janssen-Heininger YMW. Peroxiredoxins and Beyond; Redox Systems Regulating Lung Physiology and Disease. Antioxid Redox Signal 2019; 31:1070-1091. [PMID: 30799628 PMCID: PMC6767868 DOI: 10.1089/ars.2019.7752] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Significance: The lung is a unique organ, as it is constantly exposed to air, and thus it requires a robust antioxidant defense system to prevent the potential damage from exposure to an array of environmental insults, including oxidants. The peroxiredoxin (PRDX) family plays an important role in scavenging peroxides and is critical to the cellular antioxidant defense system. Recent Advances: Exciting discoveries have been made to highlight the key features of PRDXs that regulate the redox tone. PRDXs do not act in isolation as they require the thioredoxin/thioredoxin reductase/NADPH, sulfiredoxin (SRXN1) redox system, and in some cases glutaredoxin/glutathione, for their reduction. Furthermore, the chaperone function of PRDXs, controlled by the oxidation state, demonstrates the versatility in redox regulation and control of cellular biology exerted by this class of proteins. Critical Issues: Despite the long-known observations that redox perturbations accompany a number of pulmonary diseases, surprisingly little is known about the role of PRDXs in the etiology of these diseases. In this perspective, we review the studies that have been conducted thus far to address the roles of PRDXs in lung disease, or experimental models used to study these diseases. Intriguing findings, such as the secretion of PRDXs and the formation of autoantibodies, raise a number of questions about the pathways that regulate secretion, redox status, and immune response to PRDXs. Future Directions: Further understanding of the mechanisms by which individual PRDXs control lung inflammation, injury, repair, chronic remodeling, and cancer, and the importance of PRDX oxidation state, configuration, and client proteins that govern these processes is needed.
Collapse
Affiliation(s)
- Evan A Elko
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Brian Cunniff
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - David J Seward
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Shi Biao Chia
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Reem Aboushousha
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Cheryl van de Wetering
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Jos van der Velden
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Allison Manuel
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Arti Shukla
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Nicholas H Heintz
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Vikas Anathy
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Albert van der Vliet
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Yvonne M W Janssen-Heininger
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| |
Collapse
|
43
|
Karki P, Birukov KG. Rho and Reactive Oxygen Species at Crossroads of Endothelial Permeability and Inflammation. Antioxid Redox Signal 2019; 31:1009-1022. [PMID: 31126187 PMCID: PMC6765062 DOI: 10.1089/ars.2019.7798] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Significance: Increased endothelial permeability and inflammation are two major hallmarks of the life-threatening conditions such as acute respiratory distress syndrome and sepsis. There is a growing consensus in the field that the Rho family of small guanosine triphosphates are critical regulators of endothelial function at both physiological and pathological states. A basal level of reactive oxygen species (ROS) is essential for maintaining metabolic homeostasis, vascular tone, and angiogenesis; however, excessive ROS generation impairs endothelial function and promotes lung inflammation. In this review, we will focus on the role of Rho in control of endothelial function and also briefly discuss a nexus between ROS generation and Rho activation during endothelial dysfunction. Recent Advances: Extensive studies in the past decades have established that a wide range of barrier-disruptive and proinflammatory agonists activate the Rho pathway that, ultimately, leads to endothelial dysfunction via disruption of endothelial barrier and further escalation of inflammation. An increasing body of evidence suggests that a bidirectional interplay exists between the Rho pathway and ROS generation during endothelial dysfunction. Rac, a member of the Rho family, is directly involved in ROS production and ROS, in turn, activate RhoA, Rac, and Cdc42. Critical Issues: A precise mechanism of interaction between ROS generation and Rho activation and its impact on endothelial function needs to be elucidated. Future Directions: By employing advanced molecular techniques, the sequential cascades in the Rho-ROS crosstalk signaling axis need to be explored. The therapeutic potential of the Rho pathway inhibitors in endothelial-dysfunction associated cardiopulmonary disorders needs to be evaluated.
Collapse
Affiliation(s)
- Pratap Karki
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland, Baltimore, Maryland
| | - Konstantin G Birukov
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland
| |
Collapse
|
44
|
Zemskov EA, Lu Q, Ornatowski W, Klinger CN, Desai AA, Maltepe E, Yuan JXJ, Wang T, Fineman JR, Black SM. Biomechanical Forces and Oxidative Stress: Implications for Pulmonary Vascular Disease. Antioxid Redox Signal 2019; 31:819-842. [PMID: 30623676 PMCID: PMC6751394 DOI: 10.1089/ars.2018.7720] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Significance: Oxidative stress in the cell is characterized by excessive generation of reactive oxygen species (ROS). Superoxide (O2-) and hydrogen peroxide (H2O2) are the main ROS involved in the regulation of cellular metabolism. As our fundamental understanding of the underlying causes of lung disease has increased it has become evident that oxidative stress plays a critical role. Recent Advances: A number of cells in the lung both produce, and respond to, ROS. These include vascular endothelial and smooth muscle cells, fibroblasts, and epithelial cells as well as the cells involved in the inflammatory response, including macrophages, neutrophils, eosinophils. The redox system is involved in multiple aspects of cell metabolism and cell homeostasis. Critical Issues: Dysregulation of the cellular redox system has consequential effects on cell signaling pathways that are intimately involved in disease progression. The lung is exposed to biomechanical forces (fluid shear stress, cyclic stretch, and pressure) due to the passage of blood through the pulmonary vessels and the distension of the lungs during the breathing cycle. Cells within the lung respond to these forces by activating signal transduction pathways that alter their redox state with both physiologic and pathologic consequences. Future Directions: Here, we will discuss the intimate relationship between biomechanical forces and redox signaling and its role in the development of pulmonary disease. An understanding of the molecular mechanisms induced by biomechanical forces in the pulmonary vasculature is necessary for the development of new therapeutic strategies.
Collapse
Affiliation(s)
- Evgeny A Zemskov
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Qing Lu
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Wojciech Ornatowski
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Christina N Klinger
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Ankit A Desai
- Department of Medicine, Indiana University, Indianapolis, Indiana
| | - Emin Maltepe
- Department of Pediatrics, University of California, San Francisco, San Francisco, California
| | - Jason X-J Yuan
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Ting Wang
- Department of Internal Medicine, The University of Arizona Health Sciences, Phoenix, Arizona
| | - Jeffrey R Fineman
- Department of Pediatrics, University of California, San Francisco, San Francisco, California
| | - Stephen M Black
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| |
Collapse
|
45
|
Francisco-Marquez M, Galano A. Detailed Investigation of the Outstanding Peroxyl Radical Scavenging Activity of Two Novel Amino-Pyridinol-Based Compounds. J Chem Inf Model 2019; 59:3494-3505. [PMID: 31264854 DOI: 10.1021/acs.jcim.9b00517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The ability of two novel amino-pyridinol based compounds (NPyr6 and NPyr7) as peroxyl radical scavengers was investigated in silico. The gathered data indicate that they are exceptionally efficient in that role. However, solvent polarity influences their relative efficiency for that purpose. NPyr6 was identified as the best peroxyl radical scavenger in lipid solution, while NPyr7 takes that place in aqueous solution. Both compounds present two acid-base equilibria, which influence their reactivity in aqueous solution. The associated pKa values were estimated. Several reaction mechanisms were explored. Hydrogen transfer from the phenolic group was identified as the chemical route with the highest contribution to the antioxidant behavior of the investigated compounds in both, nonpolar medium and aqueous solution (at 2 ≤ pH ≤ 10). At higher pH other reaction pathways become the most relevant ones. In addition, their bioavailability, cell permeability, safety, and manufacturability were evaluated. According to these, particularly toxicity, NPyr7 seems to be a better candidate for use as an oral drug to fight oxidative stress than NPyr6.
Collapse
Affiliation(s)
- Misaela Francisco-Marquez
- Instituto Politécnico Nacional-UPIICSA , Té 950, Col. Granjas México , C.P. 08400 México City , México
| | - Annia Galano
- Departamento de Química , Universidad Autónoma Metropolitana-Iztapalapa , San Rafael Atlixco 186, Col. Vicentina. Iztapalapa , C.P. 09340 , Mexico City , México
| |
Collapse
|
46
|
Kang Y, Chen C, Hu X, Du X, Zhai H, Fang Y, Ye X, Yang W, Sun S. Sestrin2 is involved in asthma: a case-control study. Allergy Asthma Clin Immunol 2019; 15:46. [PMID: 31428169 PMCID: PMC6694511 DOI: 10.1186/s13223-019-0360-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 08/09/2019] [Indexed: 01/29/2023] Open
Abstract
Background Asthma is a chronic disease that seriously harms the health of patients. Oxidative stress is involved in asthma. As an oxidative stress-inducible protein, sestrin2 is elevated in oxidative stress-related diseases. We aimed to explore whether sestrin2 was involved in asthma. Methods Seventy-six subjects (44 in the asthma group, 32 in the control group) were recruited in this study. Plasma sestrin2 levels, peak expiratory flow (PEF), forced expiratory volume in 1 s (FEV1) % predicted, forced vital capacity (FVC) % predicted and FEV1/FVC ratio were measured in controls and in asthmatics both during an exacerbation and when controlled after the exacerbation. Results The asthma group had a significant higher sestrin2 level than the control group (asthmatics during exacerbation, 1.75 ± 0.53 ng/mL vs. 1.32 ± 0.48 ng/mL, p < 0.001; asthmatics when controlled after the exacerbation, 1.56 ± 0.46 ng/mL vs. 1.32 ± 0.48 ng/mL, p = 0.021, respectively). In addition, sestrin2 was negatively correlated with FEV1% predicted and FEV1/FVC ratio in asthmatics during exacerbation (r = − 0.393, p = 0.008; r = − 0.379, p = 0.011; respectively). Moreover, negative correlations between sestrin2 and FEV1% predicted and FEV1/FVC ratio also existed in asthmatics when controlled after the exacerbation (r = − 0.543, p < 0.001; r = − 0.433, p = 0.003 respectively). More importantly, multiple linear regression analysis demonstrated that FEV1% predicted was independently associated with sestrin2 in asthmatics both during exacerbation and when controlled after the exacerbation. Conclusions Sestrin2 is involved in asthma. Sestrin2 levels increase in asthmatics both during exacerbation and when controlled after the exacerbation. In addition, sestrin2 is independently associated with FEV1% predicted.
Collapse
Affiliation(s)
- Yanfang Kang
- 1Department of Respiratory and Critical Care Medicine, First Affiliated Hospital Kunming Medical University, No.295, Xichang Road, Wuhua District, Kunming, China.,22015 Innovation Class, Kunming Medical University, Kunming, China
| | - Chen Chen
- 3School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, China
| | - Xiaotian Hu
- 22015 Innovation Class, Kunming Medical University, Kunming, China
| | - Xiaohua Du
- 1Department of Respiratory and Critical Care Medicine, First Affiliated Hospital Kunming Medical University, No.295, Xichang Road, Wuhua District, Kunming, China
| | - Huifen Zhai
- 4Department of Respiratory Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yan Fang
- 1Department of Respiratory and Critical Care Medicine, First Affiliated Hospital Kunming Medical University, No.295, Xichang Road, Wuhua District, Kunming, China
| | - Xiulin Ye
- 1Department of Respiratory and Critical Care Medicine, First Affiliated Hospital Kunming Medical University, No.295, Xichang Road, Wuhua District, Kunming, China
| | - Weimin Yang
- 3School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, China
| | - Shibo Sun
- 1Department of Respiratory and Critical Care Medicine, First Affiliated Hospital Kunming Medical University, No.295, Xichang Road, Wuhua District, Kunming, China
| |
Collapse
|
47
|
Wu D, Birukov K. Endothelial Cell Mechano-Metabolomic Coupling to Disease States in the Lung Microvasculature. Front Bioeng Biotechnol 2019; 7:172. [PMID: 31380363 PMCID: PMC6658821 DOI: 10.3389/fbioe.2019.00172] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/03/2019] [Indexed: 12/15/2022] Open
Abstract
Lungs are the most vascular part of humans, accepting the totality of cardiac output in a volume much smaller than the body itself. Due to this cardiac output, the lung microvasculature is subject to mechanical forces including shear stress and cyclic stretch that vary with the cardiac and breathing cycle. Vessels are surrounded by extracellular matrix which dictates the stiffness which endothelial cells also sense and respond to. Shear stress, stiffness, and cyclic stretch are known to influence endothelial cell state. At high shear stress, endothelial cells exhibit cell quiescence marked by low inflammatory markers and high nitric oxide synthesis, whereas at low shear stress, endothelial cells are thought to "activate" into a pro-inflammatory state and have low nitric oxide. Shear stress' profound effect on vascular phenotype is most apparent in the arterial vasculature and in the pathophysiology of vascular inflammation. To conduct the flow of blood from the right heart, the lung microvasculature must be rigid yet compliant. It turns out that excessive substrate rigidity or stiffness is important in the development of pulmonary hypertension and chronic fibrosing lung diseases via excessive cell proliferation or the endothelial-mesenchymal transition. Recently, a new body of literature has evolved that couples mechanical sensing to endothelial phenotypic changes through metabolic signaling in clinically relevant contexts such as pulmonary hypertension, lung injury syndromes, as well as fibrosis, which is the focus of this review. Stretch, like flow, has profound effect on endothelial phenotype; metabolism studies due to stretch are in their infancy.
Collapse
Affiliation(s)
- David Wu
- Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, Chicago, IL, United States
| | - Konstantin Birukov
- Department of Anesthesia, University of Maryland, Baltimore, MD, United States
| |
Collapse
|
48
|
Nicorandil Attenuates LPS-Induced Acute Lung Injury by Pulmonary Endothelial Cell Protection via NF- κB and MAPK Pathways. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4957646. [PMID: 30984337 PMCID: PMC6431468 DOI: 10.1155/2019/4957646] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 11/04/2018] [Accepted: 11/28/2018] [Indexed: 01/06/2023]
Abstract
Acute lung injury (ALI) is a devastating critical disease characterized by diffuse inflammation and endothelial dysfunction. Increasing evidence, including from our laboratory, has revealed that the opening of ATP-sensitive potassium (KATP) channels has promising anti-inflammation and endothelial protection activities in various disorders. However, the impacts of KATP channels on ALI remain obscure. In this study, we used nicorandil (Nico), a classic KATP channel opener, to investigate whether opening of KATP channels could alleviate ALI with an emphasis on human pulmonary artery endothelial cell (HPAEC) modulation. The results showed that Nico inhibited lipopolysaccharide- (LPS-) induced inflammatory response, protein accumulation, myeloperoxidase activity, and endothelial injury. In vitro, Nico reduced LPS-induced HPAEC apoptosis and the expression of cleaved-caspase-3, caspase-9, and CCAAT/enhancer-binding protein homologous protein (CHOP). Additionally, Nico inhibited inflammation by suppressing monocyte-endothelial adhesion and decreasing the expression of proinflammatory proteins. Moreover, Nico restored the expression and the distribution of adherens junction vascular endothelial- (VE-) cadherin. Further, Nico abolished the increase in intracellular reactive oxygen species (ROS) and the activation of NF-κB and mitogen-activated protein kinase (MAPK) in HPAECs. Glibenclamide (Gli), a nonselective KATP channel blocker, abrogated the effects of Nico, implying that opening of KATP channels contributes to the relief of ALI. Together, our findings indicated that Nico alleviated LPS-induced ALI by protecting ECs function via preventing apoptosis, suppressing endothelial inflammation and reducing oxidative stress, which may be attributed to the inhibition of NF-κB and MAPK signaling pathways.
Collapse
|
49
|
Hypoxia destroys the microstructure of microtubules and causes dysfunction of endothelial cells via the PI3K/Stathmin1 pathway. Cell Biosci 2019; 9:20. [PMID: 30820314 PMCID: PMC6380067 DOI: 10.1186/s13578-019-0283-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 02/13/2019] [Indexed: 11/30/2022] Open
Abstract
Background Endothelial cells (EC) are sensitive to changes in the microenvironment, including hypoxia and ischemia. Disruption of the microtubular network has been reported in cases of ischemia. However, the signaling pathways involved in hypoxia-induced microtubular disruption are unknown. The purpose of this study was to investigate the molecular mechanisms involved in hypoxia-induced microtubular disassembly in human umbilical vein endothelial cells (HUVECs). Results HUVECs were cultured under normoxic or hypoxic conditions and pretreated with or without colchicine or paclitaxel. The MTT assay, Transwell assay, trans-endothelial permeability assay, and 5-bromo-2′-deoxy-uridine staining were used to test the survival rate, migration, permeability, and proliferation of cells, respectively. Transmission electron microscopy and phalloidin staining were used to observe the microstructure and polymerization of microtubules. The results show that the functions of HUVECs and the microtubular structure were destroyed by hypoxia, but were protected by paclitaxel and a reactive oxygen species (ROS) inhibitor. We further used western blot, a luciferase assay, and co-immunoprecipitation to describe a non-transcription-independent mechanism for PI3K activation-inhibited microtubular stability mediated by Stathmin1, a PI3K interactor that functions in microtubule depolymerization. Finally, we determined that hypoxia and ROS blocked the interaction between PI3K and Stathmin1 to activate disassembly of microtubules. Conclusion Thus, our data demonstrate that hypoxia induced the production of ROS and damaged EC function by destroying the microtubular structure through the PI3K/stathmin1 pathway.
Collapse
|
50
|
Tadin A, Gavic L, Roguljic M, Jerkovic D, Zeljezic D. Nuclear morphological changes in gingival epithelial cells of patients with periodontitis. Clin Oral Investig 2019; 23:3749-3757. [DOI: 10.1007/s00784-019-02803-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 01/11/2019] [Indexed: 01/07/2023]
|