1
|
Jiao P, Fan W, Ma X, Lin R, Zhao Y, Li Y, Zhang H, Jia X, Bi Y, Feng X, Li M, Liu W, Zhang K, Sun L. SARS-CoV-2 nonstructural protein 6 triggers endoplasmic reticulum stress-induced autophagy to degrade STING1. Autophagy 2023; 19:3113-3131. [PMID: 37482689 PMCID: PMC10621274 DOI: 10.1080/15548627.2023.2238579] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 07/14/2023] [Indexed: 07/25/2023] Open
Abstract
ABBREVIATIONS aa: amino acid; ATF6: activating transcription factor 6; ATG5: autophagy related 5; CCPG1: cell cycle progression 1; CFTR: CF transmembrane conductance regulator; cGAMP: cyclic GMP-AMP; CGAS: cyclic GMP-AMP synthase; CHX: cycloheximide; Co-IP: co-immunoprecipitation; CQ: chloroquine; EIF2A/eIF2α: eukaryotic translation initiation factor 2A; EIF2AK3/PERK: eukaryotic translation initiation factor 2 alpha kinase 3; ER: endoplasmic reticulum; ERN1/IRE1: endoplasmic reticulum to nucleus signaling 1; GFP: green fluorescent protein; HSPA5/GRP78: heat shock protein family A (Hsp70) member 5; HSV-1: herpes simplex virus type 1; IFIT1: interferon induced protein with tetratricopeptide repeats 1; IFNB1/IFN-β: interferon beta 1; IRF3: interferon regulatory factor 3; ISG15: ISG15 ubiquitin like modifier; MAP1LC3B/LC3B: microtubule associated protein 1 light chain 3 beta; MAP3K7/TAK1: mitogen-activated protein kinase kinase kinase 7; MAVS: mitochondrial antiviral signaling protein; MOI: multiplicity of infection; NFKB/NF-κB: nuclear factor kappa B; NSP6: non-structural protein 6; Δ106-108: deletion of amino acids 106-108 in NSP6 of SARS-CoV-2; Δ105-107: deletion of amino acids 105-107 in NSP6 of SARS-CoV-2; RETREG1/FAM134B: reticulophagy regulator 1; RIGI/DDX58: RNA sensor RIG-I; SQSTM1/p62: sequestosome 1; STING1: stimulator of interferon response cGAMP interactor 1; TBK1: TANK binding kinase 1.
Collapse
Affiliation(s)
- Pengtao Jiao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Wenhui Fan
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Xiaoya Ma
- Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Runshan Lin
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yuna Zhao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Laboratory of Animal Infectious Diseases, College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning, Guangxi, China
| | - Yabo Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Laboratory of Animal Infectious Diseases, College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning, Guangxi, China
| | - He Zhang
- Institute of Infectious Diseases, Shenzhen Bay Laboratory, Shenzhen, Guangdong, China
| | - Xiaojuan Jia
- The Biological Safety Level-3 (BSL-3) Laboratory of Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Yuhai Bi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
- The Biological Safety Level-3 (BSL-3) Laboratory of Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Xiaoli Feng
- Kunming National High-Level Biosafety Research Center for Non-Human Primates, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Minghua Li
- Kunming National High-Level Biosafety Research Center for Non-Human Primates, Center for Biosafety Mega-Science, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Wenjun Liu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources & Laboratory of Animal Infectious Diseases, College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning, Guangxi, China
- Institute of Infectious Diseases, Shenzhen Bay Laboratory, Shenzhen, Guangdong, China
| | - Ke Zhang
- Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Lei Sun
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
2
|
Turton K, Parks HJ, Zarodkiewicz P, Hamad MA, Dwane R, Parau G, Ingram RJ, Coll RC, Bryant CE, Valvano MA. The Achromobacter type 3 secretion system drives pyroptosis and immunopathology via independent activation of NLRC4 and NLRP3 inflammasomes. Cell Rep 2023; 42:113012. [PMID: 37598340 PMCID: PMC7614980 DOI: 10.1016/j.celrep.2023.113012] [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: 02/07/2023] [Revised: 07/19/2023] [Accepted: 08/04/2023] [Indexed: 08/22/2023] Open
Abstract
How the opportunistic Gram-negative pathogens of the genus Achromobacter interact with the innate immune system is poorly understood. Using three Achromobacter clinical isolates from two species, we show that the type 3 secretion system (T3SS) is required to induce cell death in human macrophages by inflammasome-dependent pyroptosis. Macrophages deficient in the inflammasome sensors NLRC4 or NLRP3 undergo pyroptosis upon bacterial internalization, but those deficient in both NLRC4 and NLRP3 do not, suggesting either sensor mediates pyroptosis in a T3SS-dependent manner. Detailed analysis of the intracellular trafficking of one isolate indicates that the intracellular bacteria reside in a late phagolysosome. Using an intranasal mouse infection model, we observe that Achromobacter damages lung structure and causes severe illness, contingent on a functional T3SS. Together, we demonstrate that Achromobacter species can survive phagocytosis by promoting macrophage cell death and inflammation by redundant mechanisms of pyroptosis induction in a T3SS-dependent manner.
Collapse
Affiliation(s)
- Keren Turton
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Hannah J Parks
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Paulina Zarodkiewicz
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Mohamad A Hamad
- Department of Medical Laboratory Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Rachel Dwane
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Georgiana Parau
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Rebecca J Ingram
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Rebecca C Coll
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK
| | - Clare E Bryant
- Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES, UK; Department of Medicine, Addenbrooke's Hospital, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK
| | - Miguel A Valvano
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast BT9 7BL, UK.
| |
Collapse
|
3
|
Zhou Y, Hua S, Song L. The versatile defender: exploring the multifaceted role of p62 in intracellular bacterial infection. Front Cell Infect Microbiol 2023; 13:1180708. [PMID: 37216179 PMCID: PMC10196109 DOI: 10.3389/fcimb.2023.1180708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/25/2023] [Indexed: 05/24/2023] Open
Abstract
As a highly conserved, multifunctional protein with multiple domains, p62/SQSTM1 plays a crucial role in several essential cellular activities, particularly selective autophagy. Recent research has shown that p62 is crucial in eradicating intracellular bacteria by xenophagy, a selective autophagic process that identifies and eliminates such microorganisms. This review highlights the various roles of p62 in intracellular bacterial infections, including both direct and indirect, antibacterial and infection-promoting aspects, and xenophagy-dependent and independent functions, as documented in published literature. Additionally, the potential applications of synthetic drugs targeting the p62-mediated xenophagy mechanism and unresolved questions about p62's roles in bacterial infections are also discussed.
Collapse
Affiliation(s)
- Yuhao Zhou
- Department of Respiratory Medicine, Center for Pathogen Biology and Infectious Diseases, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
- State Key Laboratory for Zoonotic Diseases, The First Hospital of Jilin University, Changchun, China
| | - Shucheng Hua
- Department of Respiratory Medicine, Center for Pathogen Biology and Infectious Diseases, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
- State Key Laboratory for Zoonotic Diseases, The First Hospital of Jilin University, Changchun, China
| | - Lei Song
- Department of Respiratory Medicine, Center for Pathogen Biology and Infectious Diseases, Key Laboratory of Organ Regeneration and Transplantation of the Ministry of Education, The First Hospital of Jilin University, Changchun, China
- State Key Laboratory for Zoonotic Diseases, The First Hospital of Jilin University, Changchun, China
| |
Collapse
|
4
|
Emerging Concepts in Defective Macrophage Phagocytosis in Cystic Fibrosis. Int J Mol Sci 2022; 23:ijms23147750. [PMID: 35887098 PMCID: PMC9319215 DOI: 10.3390/ijms23147750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/09/2022] [Accepted: 07/11/2022] [Indexed: 01/18/2023] Open
Abstract
Cystic fibrosis (CF) is caused by mutations of the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Chronic inflammation and decline in lung function are major reasons for morbidity in CF. Mutant CFTR expressed in phagocytic cells such as macrophages contributes to persistent infection, inflammation, and lung disease in CF. Macrophages play a central role in innate immunity by eliminating pathogenic microbes by a process called phagocytosis. Phagocytosis is required for tissue homeostasis, balancing inflammation, and crosstalk with the adaptive immune system for antigen presentation. This review focused on (1) current understandings of the signaling underlying phagocytic mechanisms; (2) existing evidence for phagocytic dysregulation in CF; and (3) the emerging role of CFTR modulators in influencing CF phagocytic function. Alterations in CF macrophages from receptor initiation to phagosome formation are linked to disease progression in CF. A deeper understanding of macrophages in the context of CFTR and phagocytosis proteins at each step of phagosome formation might contribute to the new therapeutic development of dysregulated innate immunity in CF. Therefore, the review also indicates future areas of research in the context of CFTR and macrophages.
Collapse
|
5
|
Pang Y, Wu L, Tang C, Wang H, Wei Y. Autophagy-Inflammation Interplay During Infection: Balancing Pathogen Clearance and Host Inflammation. Front Pharmacol 2022; 13:832750. [PMID: 35273506 PMCID: PMC8902503 DOI: 10.3389/fphar.2022.832750] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 01/24/2022] [Indexed: 12/11/2022] Open
Abstract
Inflammation is an essential immune response of the host against infections but is often over-activated, leading to a variety of disorders. Autophagy, a conserved degradation pathway, also protects cells by capturing intracellular pathogens that enter the cell and transporting them to the lysosome for clearance. Dysfunctional autophagy is often associated with uncontrolled inflammatory responses during infection. In recent years, more and more research has focused on the crosstalk between autophagy and inflammation. In this paper, we review the latest research advances in this field, hoping to gain insight into the mechanisms by which the body balances autophagy and inflammation in infections and how this mechanism can be used to fight infections better.
Collapse
Affiliation(s)
- Yuqian Pang
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Cell Homeostasis and Cancer Research of Guangdong Higher Education Institutes, Guangzhou, China
| | - Lanxi Wu
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Cell Homeostasis and Cancer Research of Guangdong Higher Education Institutes, Guangzhou, China
| | - Cheng Tang
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Cell Homeostasis and Cancer Research of Guangdong Higher Education Institutes, Guangzhou, China
| | - Hongna Wang
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Cell Homeostasis and Cancer Research of Guangdong Higher Education Institutes, Guangzhou, China.,GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, China
| | - Yongjie Wei
- Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Cell Homeostasis and Cancer Research of Guangdong Higher Education Institutes, Guangzhou, China.,State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou, China
| |
Collapse
|
6
|
Badr A, Eltobgy M, Krause K, Hamilton K, Estfanous S, Daily KP, Abu Khweek A, Hegazi A, Anne MNK, Carafice C, Robledo-Avila F, Saqr Y, Zhang X, Bonfield TL, Gavrilin MA, Partida-Sanchez S, Seveau S, Cormet-Boyaka E, Amer AO. CFTR Modulators Restore Acidification of Autophago-Lysosomes and Bacterial Clearance in Cystic Fibrosis Macrophages. Front Cell Infect Microbiol 2022; 12:819554. [PMID: 35252032 PMCID: PMC8890004 DOI: 10.3389/fcimb.2022.819554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 01/19/2022] [Indexed: 12/17/2022] Open
Abstract
Cystic fibrosis (CF) human and mouse macrophages are defective in their ability to clear bacteria such as Burkholderia cenocepacia. The autophagy process in CF (F508del) macrophages is halted, and the underlying mechanism remains unclear. Furthermore, the role of CFTR in maintaining the acidification of endosomal and lysosomal compartments in CF cells has been a subject of debate. Using 3D reconstruction of z-stack confocal images, we show that CFTR is recruited to LC3-labeled autophagosomes harboring B. cenocepacia. Using several complementary approaches, we report that CF macrophages display defective lysosomal acidification and degradative function for cargos destined to autophagosomes, whereas non-autophagosomal cargos are effectively degraded within acidic compartments. Notably, treatment of CF macrophages with CFTR modulators (tezacaftor/ivacaftor) improved the autophagy flux, lysosomal acidification and function, and bacterial clearance. In addition, CFTR modulators improved CFTR function as demonstrated by patch-clamp. In conclusion, CFTR regulates the acidification of a specific subset of lysosomes that specifically fuse with autophagosomes. Therefore, our study describes a new biological location and function for CFTR in autophago-lysosomes and clarifies the long-standing discrepancies in the field.
Collapse
Affiliation(s)
- Asmaa Badr
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
- Clinical Pathology Department, College of Medicine, Mansoura University, Mansoura, Egypt
| | - Mostafa Eltobgy
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Kathrin Krause
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
- Max Planck Unit for the Science of Pathogens, Berlin, Germany
| | - Kaitlin Hamilton
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Shady Estfanous
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | - Kylene P. Daily
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Arwa Abu Khweek
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
- Department of Biology and Biochemistry, Birzeit University, West Bank, Palestine
| | - Ahmad Hegazi
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Midhun N. K. Anne
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Cierra Carafice
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Frank Robledo-Avila
- Center for Microbial Pathogenesis, Nationwide Children’s Hospital, Columbus, OH, United States
| | - Youssra Saqr
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Xiaoli Zhang
- Center for Biostatistics, Ohio State University, Columbus, OH, United States
| | - Tracey L. Bonfield
- Department of Genetics and Genome Sciences, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Mikhail A. Gavrilin
- Department of Genetics and Genome Sciences, School of Medicine, Case Western Reserve University, Columbus, OH, United States
| | | | - Stephanie Seveau
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Estelle Cormet-Boyaka
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, United States
| | - Amal O. Amer
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, United States
| |
Collapse
|
7
|
Flores-Vega VR, Vargas-Roldán SY, Lezana-Fernández JL, Lascurain R, Santos-Preciado JI, Rosales-Reyes R. Bacterial Subversion of Autophagy in Cystic Fibrosis. Front Cell Infect Microbiol 2021; 11:760922. [PMID: 34692569 PMCID: PMC8531276 DOI: 10.3389/fcimb.2021.760922] [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: 08/19/2021] [Accepted: 09/20/2021] [Indexed: 11/13/2022] Open
Abstract
Cystic fibrosis (CF) is a genetic disease affecting more than 70,000 people worldwide. It is caused by a mutation in the cftr gene, a chloride ion transporter localized in the plasma membrane of lung epithelial cells and other organs. The loss of CFTR function alters chloride, bicarbonate, and water transport through the plasma membrane, promoting the production of a thick and sticky mucus in which bacteria including Pseudomonas aeruginosa and Burkholderia cenocepacia can produce chronic infections that eventually decrease the lung function and increase the risk of mortality. Autophagy is a well-conserved lysosomal degradation pathway that mediates pathogen clearance and plays an important role in the control of bacterial infections. In this mini-review, we describe the principal strategies used by P. aeruginosa and B. cenocepacia to survive and avoid microbicidal mechanisms within the autophagic pathway leading to the establishment of chronic inflammatory immune responses that gradually compromise the lung function and the life of CF patients.
Collapse
Affiliation(s)
- Verónica Roxana Flores-Vega
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Escuela de Ciencias de la Salud, Universidad del Valle de México, Campus Coyoacán, Mexico City, Mexico
| | - Silvia Yalid Vargas-Roldán
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional, Mexico City, Mexico
| | - José Luis Lezana-Fernández
- Laboratorio de Fisiología Respiratoria y la Clínica de Fibrosis Quística, Hospital Infantil de México Federico Gómez, Mexico City, Mexico.,Dirección Médica, Asociación Mexicana de Fibrosis Quística, Mexico City, Mexico
| | - Ricardo Lascurain
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - José Ignacio Santos-Preciado
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Roberto Rosales-Reyes
- Unidad de Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| |
Collapse
|
8
|
Lukasiak A, Zajac M. The Distribution and Role of the CFTR Protein in the Intracellular Compartments. MEMBRANES 2021; 11:membranes11110804. [PMID: 34832033 PMCID: PMC8618639 DOI: 10.3390/membranes11110804] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/18/2021] [Accepted: 10/21/2021] [Indexed: 12/11/2022]
Abstract
Cystic fibrosis is a hereditary disease that mainly affects secretory organs in humans. It is caused by mutations in the gene encoding CFTR with the most common phenylalanine deletion at position 508. CFTR is an anion channel mainly conducting Cl− across the apical membranes of many different epithelial cells, the impairment of which causes dysregulation of epithelial fluid secretion and thickening of the mucus. This, in turn, leads to the dysfunction of organs such as the lungs, pancreas, kidney and liver. The CFTR protein is mainly localized in the plasma membrane; however, there is a growing body of evidence that it is also present in the intracellular organelles such as the endosomes, lysosomes, phagosomes and mitochondria. Dysfunction of the CFTR protein affects not only the ion transport across the epithelial tissues, but also has an impact on the proper functioning of the intracellular compartments. The review aims to provide a summary of the present state of knowledge regarding CFTR localization and function in intracellular compartments, the physiological role of this localization and the consequences of protein dysfunction at cellular, epithelial and organ levels. An in-depth understanding of intracellular processes involved in CFTR impairment may reveal novel opportunities in pharmacological agents of cystic fibrosis.
Collapse
|
9
|
Soares VEM, do Carmo TIT, Dos Anjos F, Wruck J, de Oliveira Maciel SFV, Bagatini MD, de Resende E Silva DT. Role of inflammation and oxidative stress in tissue damage associated with cystic fibrosis: CAPE as a future therapeutic strategy. Mol Cell Biochem 2021; 477:39-51. [PMID: 34529223 DOI: 10.1007/s11010-021-04263-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 09/08/2021] [Indexed: 10/20/2022]
Abstract
Cystic fibrosis (CF) is an autosomal recessive disease caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, responsible for the synthesis of the CFTR protein, a chloride channel. The gene has approximately 2000 known mutations and all of them affect in some degree the protein function, which makes the pathophysiological manifestations to be multisystemic, mainly affecting the respiratory, gastrointestinal, endocrine, and reproductive tracts. Currently, the treatment of the disease is restricted to controlling symptoms and, more recently, a group of drugs that act directly on the defective protein, known as CFTR modulators, was developed. However, their high cost and difficult access mean that their use is still very restricted. It is important to search for safe and low-cost alternative therapies for CF and, in this context, natural compounds and, mainly, caffeic acid phenethyl ester (CAPE) appear as promising strategies to assist in the treatment of the disease. CAPE is a compound derived from propolis extracts that has antioxidant and anti-inflammatory activities, covering important aspects of the pathophysiology of CF, which points to the possible benefit of its use in the disease treatment. To date, no studies have effectively tested CAPE for CF and, therefore, we intend with this review to elucidate the role of inflammation and oxidative stress for tissue damage seen in CF, associating them with CAPE actions and its pharmacologically active derivatives. In this way, we offer a theoretical basis for conducting preclinical and clinical studies relating the use of this molecule to CF.
Collapse
Affiliation(s)
- Victor Emanuel Miranda Soares
- Medical School, Federal University of Fronteira Sul, Rodovia SC 484 - Km 02, Fronteira Sul, Chapecó, SC, 89815-899, Brazil
| | | | - Fernanda Dos Anjos
- Medical School, Federal University of Fronteira Sul, Rodovia SC 484 - Km 02, Fronteira Sul, Chapecó, SC, 89815-899, Brazil
| | - Jonatha Wruck
- Medical School, Federal University of Fronteira Sul, Rodovia SC 484 - Km 02, Fronteira Sul, Chapecó, SC, 89815-899, Brazil
| | | | - Margarete Dulce Bagatini
- Graduate Program in Biomedical Sciences, Federal University of Fronteira Sul, Rodovia SC 484 - Km 02, Fronteira Sul, Chapecó, SC, 89815-899, Brazil
| | - Débora Tavares de Resende E Silva
- Graduate Program in Biomedical Sciences, Federal University of Fronteira Sul, Rodovia SC 484 - Km 02, Fronteira Sul, Chapecó, SC, 89815-899, Brazil.
| |
Collapse
|
10
|
Du Y, Guo H, Guo L, Miao J, Ren H, Liu K, Ren L, He J, Wang X, Chen J, Li J, Wang Y, Wang J, Huang N. The regulatory effect of acetylation of HMGN2 and H3K27 on pyocyanin-induced autophagy in macrophages by affecting Ulk1 transcription. J Cell Mol Med 2021; 25:7524-7537. [PMID: 34278675 PMCID: PMC8335688 DOI: 10.1111/jcmm.16788] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 06/05/2021] [Accepted: 06/23/2021] [Indexed: 12/19/2022] Open
Abstract
Pyocyanin (PYO) is a major virulence factor secreted by Pseudomonas aeruginosa, and autophagy is a crucial homeostatic mechanism for the interaction between the pathogens and the host. It remains unknown whether PYO leads to autophagy in macrophages by regulating histone acetylation. The high mobility group nucleosomal binding domain 2 (HMGN2) has been reported to regulate the PYO‐induced autophagy and oxidative stress in the epithelial cells; however, the underlying molecular mechanism has not been fully elucidated. In this study, PYO was found to induce autophagy in macrophages, and the mechanism might be correlated with the up‐regulation of HMGN2 acetylation (HMGN2ac) and the down‐regulation of H3K27 acetylation (H3K27ac) by modulation of the activities of acetyltransferases and deacetylases. Moreover, we further demonstrated that the up‐regulated HMGN2ac enhances its recruitment to the Ulk1 promoter, while the down‐regulation of H3K27ac reduces its recruitment to the Ulk1 promoter, thereby promoting or inhibiting the transcription of Ulk1. In conclusion, HMGN2ac and H3K27ac play regulatory roles in the PYO‐induced autophagy in macrophages.
Collapse
Affiliation(s)
- Yu Du
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China.,Department of Anesthesiology, Nanchong Central Hospital, Second Clinical Medical Institution, North Sichuan Medical College, Nanchong, China
| | - Hongjun Guo
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lijuan Guo
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Junming Miao
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Hongyu Ren
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Keyun Liu
- Department of Physiology, School of Medicine, Hubei University for Nationalities, Enshi, China
| | - Laibin Ren
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Jinchen He
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Xiaoying Wang
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Junli Chen
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Jingyu Li
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Yi Wang
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - Ji Wang
- Department of Anesthesiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Ning Huang
- Department of Pathophysiology, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| |
Collapse
|
11
|
Gasdermin D restricts Burkholderia cenocepacia infection in vitro and in vivo. Sci Rep 2021; 11:855. [PMID: 33441602 PMCID: PMC7807041 DOI: 10.1038/s41598-020-79201-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 11/23/2020] [Indexed: 01/29/2023] Open
Abstract
Burkholderia cenocepacia (B. cenocepacia) is an opportunistic bacterium; causing severe life threatening systemic infections in immunocompromised individuals including cystic fibrosis patients. The lack of gasdermin D (GSDMD) protects mice against endotoxin lipopolysaccharide (LPS) shock. On the other hand, GSDMD promotes mice survival in response to certain bacterial infections. However, the role of GSDMD during B. cenocepacia infection is not yet determined. Our in vitro study shows that GSDMD restricts B. cenocepacia replication within macrophages independent of its role in cell death through promoting mitochondrial reactive oxygen species (mROS) production. mROS is known to stimulate autophagy, hence, the inhibition of mROS or the absence of GSDMD during B. cenocepacia infections reduces autophagy which plays a critical role in the restriction of the pathogen. GSDMD promotes inflammation in response to B. cenocepacia through mediating the release of inflammasome dependent cytokine (IL-1β) and an independent one (CXCL1) (KC). Additionally, different B. cenocepacia secretory systems (T3SS, T4SS, and T6SS) contribute to inflammasome activation together with bacterial survival within macrophages. In vivo study confirmed the in vitro findings and showed that GSDMD restricts B. cenocepacia infection and dissemination and stimulates autophagy in response to B. cenocepacia. Nevertheless, GSDMD promotes lung inflammation and necrosis in response to B. cenocepacia without altering mice survival. This study describes the double-edged functions of GSDMD in response to B. cenocepacia infection and shows the importance of GSDMD-mediated mROS in restriction of B. cenocepacia.
Collapse
|
12
|
Hamilton K, Krause K, Badr A, Daily K, Estfanous S, Eltobgy M, Khweek AA, Anne MNK, Carafice C, Baetzhold D, Tonniges JR, Zhang X, Gavrilin MA, Parinandi NL, Amer AO. Defective immunometabolism pathways in cystic fibrosis macrophages. J Cyst Fibros 2020; 20:664-672. [PMID: 33208300 DOI: 10.1016/j.jcf.2020.10.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/23/2020] [Accepted: 10/24/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Mitochondria play a key role in immune defense pathways, particularly for macrophages. We and others have previously demonstrated that cystic fibrosis (CF) macrophages exhibit weak autophagy activity and exacerbated inflammatory responses. Previous studies have revealed that mitochondria are defective in CF epithelial cells, but to date, the connection between defective mitochondrial function and CF macrophage immune dysregulation has not been fully elucidated. Here, we present a characterization of mitochondrial dysfunction in CF macrophages. METHODS Mitochondrial function in wild-type (WT) and CF F508del/F508del murine macrophages was measured using the Seahorse Extracellular Flux analyzer. Mitochondrial morphology was investigated using transmission electron and confocal microscopy. Mitochondrial membrane potential (MMP) as well as mitochondrial reactive oxygen species (mROS) were measured using TMRM and MitoSOX Red fluorescent dyes, respectively. All assays were performed at baseline and following infection by Burkholderia cenocepacia, a multi-drug resistant bacterium that causes detrimental infections in CF patients. RESULTS We have identified impaired oxygen consumption in CF macrophages without and with B. cenocepacia infection. We also observed increased mitochondrial fragmentation in CF macrophages following infection. Lastly, we observed increased MMP and impaired mROS production in CF macrophages following infection with B. cenocepacia. CONCLUSIONS The mitochondrial defects identified are key components of the macrophage response to infection. Their presence suggests that mitochondrial dysfunction contributes to impaired bacterial killing in CF macrophages. Our current study will enhance our understanding of the pathobiology of CF and lead to the identification of novel mitochondrial therapeutic targets for CF.
Collapse
Affiliation(s)
- Kaitlin Hamilton
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Kathrin Krause
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Asmaa Badr
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Kylene Daily
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Shady Estfanous
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Mostafa Eltobgy
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Arwa Abu Khweek
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA; Department of Biology and Biochemistry, Birzeit University, Birzeit, West Bank, Palestine
| | - Midhun N K Anne
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Cierra Carafice
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Daniel Baetzhold
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Jeffrey R Tonniges
- Campus Microscopy and Imaging Facility, The Ohio State University, Columbus, OH 43210, USA
| | - Xiaoli Zhang
- Center for Biostatistics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Mikhail A Gavrilin
- Department of Internal Medicine, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Narasimham L Parinandi
- Department of Internal Medicine, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Amal O Amer
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH 43210, USA.
| |
Collapse
|
13
|
Abstract
Acute Respiratory Distress Syndrome is a severe disorder affecting thousands of individuals worldwide. The available medical countermeasures do not sufficiently suppress the unacceptable high mortality rates associated with those in need. Thus, intense efforts aim to delineate the function of the lung endothelium, so to deliver new therapeutic approaches against this disease. The present manuscript attempts to shed light on the interrelations between the unfolded protein response and autophagy towards lung disease, to deliver a new line of possible therapeutic approaches against the ferocious Acute Respiratory Distress Syndrome.
Collapse
Affiliation(s)
- Mohammad S Akhter
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana 71201, USA
| | - Mohammad A Uddin
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana 71201, USA
| | - Khadeja-Tul Kubra
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana 71201, USA
| | - Nektarios Barabutis
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana 71201, USA
| |
Collapse
|
14
|
Roles of Specialized Pro-Resolving Lipid Mediators in Autophagy and Inflammation. Int J Mol Sci 2020; 21:ijms21186637. [PMID: 32927853 PMCID: PMC7555248 DOI: 10.3390/ijms21186637] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 12/12/2022] Open
Abstract
Autophagy is a catabolic pathway that accounts for degradation and recycling of cellular components to extend cell survival under stress conditions. In addition to this prominent role, recent evidence indicates that autophagy is crucially involved in the regulation of the inflammatory response, a tightly controlled process aimed at clearing the inflammatory stimulus and restoring tissue homeostasis. To be efficient and beneficial to the host, inflammation should be controlled by a resolution program, since uncontrolled inflammation is the underlying cause of many pathologies. Resolution of inflammation is an active process mediated by a variety of mediators, including the so-called specialized pro-resolving lipid mediators (SPMs), a family of endogenous lipid autacoids known to regulate leukocyte infiltration and activities, and counterbalance cytokine production. Recently, regulation of autophagic mechanisms by these mediators has emerged, uncovering unappreciated connections between inflammation resolution and autophagy. Here, we summarize mechanisms of autophagy and resolution, focusing on the contribution of autophagy in sustaining paradigmatic examples of chronic inflammatory disorders. Then, we discuss the evidence that SPMs can restore dysregulated autophagy, hypothesizing that resolution of inflammation could represent an innovative approach to modulate autophagy and its impact on the inflammatory response.
Collapse
|
15
|
Pehote G, Vij N. Autophagy Augmentation to Alleviate Immune Response Dysfunction, and Resolve Respiratory and COVID-19 Exacerbations. Cells 2020; 9:cells9091952. [PMID: 32847034 PMCID: PMC7565665 DOI: 10.3390/cells9091952] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/18/2020] [Accepted: 08/21/2020] [Indexed: 12/18/2022] Open
Abstract
The preservation of cellular homeostasis requires the synthesis of new proteins (proteostasis) and organelles, and the effective removal of misfolded or impaired proteins and cellular debris. This cellular homeostasis involves two key proteostasis mechanisms, the ubiquitin proteasome system and the autophagy–lysosome pathway. These catabolic pathways have been known to be involved in respiratory exacerbations and the pathogenesis of various lung diseases, such as chronic obstructive pulmonary disease (COPD), cystic fibrosis (CF), idiopathic pulmonary fibrosis (IPF), acute lung injury (ALI), acute respiratory distress syndrome (ARDS), and coronavirus disease-2019 (COVID-19). Briefly, proteostasis and autophagy processes are known to decline over time with age, cigarette or biomass smoke exposure, and/or influenced by underlying genetic factors, resulting in the accumulation of misfolded proteins and cellular debris, elevating apoptosis and cellular senescence, and initiating the pathogenesis of acute or chronic lung disease. Moreover, autophagic dysfunction results in an impaired microbial clearance, post-bacterial and/or viral infection(s) which contribute to the initiation of acute and recurrent respiratory exacerbations as well as the progression of chronic obstructive and restrictive lung diseases. In addition, the autophagic dysfunction-mediated cystic fibrosis transmembrane conductance regulator (CFTR) immune response impairment further exacerbates the lung disease. Recent studies demonstrate the therapeutic potential of novel autophagy augmentation strategies, in alleviating the pathogenesis of chronic obstructive or restrictive lung diseases and exacerbations such as those commonly seen in COPD, CF, ALI/ARDS and COVID-19.
Collapse
Affiliation(s)
- Garrett Pehote
- Michigan State University College of Osteopathic Medicine, East Lansing, MI 48823, USA;
| | - Neeraj Vij
- Department of Pediatrics and Pulmonary Medicine, the Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- PRECISION THERANOSTICS INC, Baltimore, MD 21202, USA
- VIJ BIOTECH, Baltimore, MD 21202, USA
- Correspondence: or ; Tel.: +1-240-623-0757
| |
Collapse
|
16
|
Currie AJ, Main ET, Wilson HM, Armstrong-James D, Warris A. CFTR Modulators Dampen Aspergillus-Induced Reactive Oxygen Species Production by Cystic Fibrosis Phagocytes. Front Cell Infect Microbiol 2020; 10:372. [PMID: 32793514 PMCID: PMC7393064 DOI: 10.3389/fcimb.2020.00372] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/17/2020] [Indexed: 12/17/2022] Open
Abstract
Excessive inflammation by phagocytes during Aspergillus fumigatus infection is thought to promote lung function decline in CF patients. CFTR modulators have been shown to reduce A. fumigatus colonization in vivo, however, their antifungal and anti-inflammatory mechanisms are unclear. Other treatments including azithromycin and acebilustat may dampen Aspergillus-induced inflammation due to their immunomodulatory properties. Therefore, we set out in this study to determine the effects of current CF therapies on ROS production and fungal killing, either direct or indirect by enhancing antifungal immune mechanisms in peripheral blood immune cells from CF patients upon A. fumigatus infection. Isolated peripheral blood mononuclear cells (PBMCs) and polymorphonuclear cells (PMNs) from CF patients and healthy volunteers were challenged with A. fumigatus following pre-treatment with CFTR modulators, azithromycin or acebilustat. Ivacaftor/lumacaftor treated CF and control subject PMNs resulted in a significant reduction (p < 0.05) in Aspergillus-induced ROS. For CF PBMC, Aspergillus-induced ROS was significantly reduced when pre-treated with ivacaftor alone (p < 0.01) or in combination with lumacaftor (p < 0.01), with a comparable significant reduction in control subject PBMC (p < 0.05). Azithromycin and acebilustat had no effect on ROS production by CF or control subject phagocytes. None of the treatments showed an indirect or direct antifungal activity. In summary, CFTR modulators have potential for additional immunomodulatory benefits to prevent or treat Aspergillus-induced inflammation in CF. The comparable effects of CFTR modulators observed in phagocytes from control subjects questions their exact mechanism of action.
Collapse
Affiliation(s)
- Alexander J Currie
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom.,Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, United Kingdom
| | - Ellen T Main
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Heather M Wilson
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | | | - Adilia Warris
- Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, United Kingdom
| |
Collapse
|
17
|
Turton KB, Ingram RJ, Valvano MA. Macrophage dysfunction in cystic fibrosis: Nature or nurture? J Leukoc Biol 2020; 109:573-582. [PMID: 32678926 DOI: 10.1002/jlb.4ru0620-245r] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/03/2020] [Accepted: 06/05/2020] [Indexed: 12/12/2022] Open
Abstract
Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) affect the homeostasis of chloride flux by epithelial cells. This has deleterious consequences, especially in respiratory epithelia, where the defect results in mucus accumulation distinctive of cystic fibrosis. CFTR is, however, also expressed in phagocytic cells, like macrophages. Immune cells are highly sensitive to conditioning by their environment; thus, CFTR dysfunction in epithelia influences macrophages by affecting the lung milieu, but the mutations also appear to be directly consequential for intrinsic macrophage functions. Particular mutations can alter CFTR's folding, traffic of the protein to the membrane and function. As such, understanding the intrinsic effects of CFTR mutation requires distinguishing the secondary effects of misfolded CFTR on cell stress pathways from the primary defect of CFTR dysfunction/absence. Investigations into CFTR's role in macrophages have exploited various models, each with their own advantages and limitations. This review summarizes these methodologic approaches, discussing their physiological correspondence and highlighting key findings. The controversy surrounding CFTR-dependent acidification is used as a case study to highlight difficulties in commensurability across model systems. Recent work in macrophage biology, including polarization and host-pathogen interaction studies, brought into the context of CFTR research, offers potential explanations for observed discrepancies between studies. Moreover, the rapid advancement of novel gene editing technologies and new macrophage model systems makes this assessment of the field's models and methodologies timely.
Collapse
Affiliation(s)
- Keren B Turton
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, United Kingdom
| | - Rebecca J Ingram
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, United Kingdom
| | - Miguel A Valvano
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, United Kingdom
| |
Collapse
|
18
|
Krause K, Daily K, Estfanous S, Hamilton K, Badr A, Abu Khweek A, Hegazi R, Anne MNK, Klamer B, Zhang X, Gavrilin MA, Pancholi V, Amer AO. Caspase-11 counteracts mitochondrial ROS-mediated clearance of Staphylococcus aureus in macrophages. EMBO Rep 2019; 20:e48109. [PMID: 31637841 PMCID: PMC6893291 DOI: 10.15252/embr.201948109] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 09/16/2019] [Accepted: 09/25/2019] [Indexed: 02/05/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a growing health concern due to increasing resistance to antibiotics. As a facultative intracellular pathogen, MRSA is capable of persisting within professional phagocytes including macrophages. Here, we identify a role for CASP11 in facilitating MRSA survival within murine macrophages. We show that MRSA actively prevents the recruitment of mitochondria to the vicinity of the vacuoles they reside in to avoid intracellular demise. This process requires CASP11 since its deficiency allows increased association of MRSA-containing vacuoles with mitochondria. The induction of mitochondrial superoxide by antimycin A (Ant A) improves MRSA eradication in casp11-/- cells, where mitochondria remain in the vicinity of the bacterium. In WT macrophages, Ant A does not affect MRSA persistence. When mitochondrial dissociation is prevented by the actin depolymerizing agent cytochalasin D, Ant A effectively reduces MRSA numbers. Moreover, the absence of CASP11 leads to reduced cleavage of CASP1, IL-1β, and CASP7, as well as to reduced production of CXCL1/KC. Our study provides a new role for CASP11 in promoting the persistence of Gram-positive bacteria.
Collapse
Affiliation(s)
- Kathrin Krause
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| | - Kylene Daily
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| | - Shady Estfanous
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| | - Kaitlin Hamilton
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| | - Asmaa Badr
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| | - Arwa Abu Khweek
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
- Department of Biology and BiochemistryBirzeit UniversityBirzeitWest BankPalestine
| | - Rana Hegazi
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| | - Midhun NK Anne
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| | - Brett Klamer
- Center for BiostatisticsOhio State UniversityColumbusOHUSA
| | - Xiaoli Zhang
- Center for BiostatisticsOhio State UniversityColumbusOHUSA
| | | | - Vijay Pancholi
- Department of PathologyOhio State UniversityColumbusOHUSA
| | - Amal O Amer
- Department of Microbial Infection and ImmunityInfectious Diseases InstituteOhio State UniversityColumbusOHUSA
| |
Collapse
|
19
|
Caution K, Young N, Robledo-Avila F, Krause K, Abu Khweek A, Hamilton K, Badr A, Vaidya A, Daily K, Gosu H, Anne MNK, Eltobgy M, Dakhlallah D, Argwal S, Estfanous S, Zhang X, Partida-Sanchez S, Gavrilin MA, Jarjour WN, Amer AO. Caspase-11 Mediates Neutrophil Chemotaxis and Extracellular Trap Formation During Acute Gouty Arthritis Through Alteration of Cofilin Phosphorylation. Front Immunol 2019; 10:2519. [PMID: 31803174 PMCID: PMC6874099 DOI: 10.3389/fimmu.2019.02519] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/09/2019] [Indexed: 12/21/2022] Open
Abstract
Gout is characterized by attacks of arthritis with hyperuricemia and monosodium urate (MSU) crystal-induced inflammation within joints. Innate immune responses are the primary drivers for tissue destruction and inflammation in gout. MSU crystals engage the Nlrp3 inflammasome, leading to the activation of caspase-1 and production of IL-1β and IL-18 within gout-affected joints, promoting the influx of neutrophils and monocytes. Here, we show that caspase-11−/− mice and their derived macrophages produce significantly reduced levels of gout-specific cytokines including IL-1β, TNFα, IL-6, and KC, while others like IFNγ and IL-12p70 are not altered. IL-1β induces the expression of caspase-11 in an IL-1 receptor-dependent manner in macrophages contributing to the priming of macrophages during sterile inflammation. The absence of caspase-11 reduced the ability of macrophages and neutrophils to migrate in response to exogenously injected KC in vivo. Notably, in vitro, caspase-11−/− neutrophils displayed random migration in response to a KC gradient when compared to their WT counterparts. This phenotype was associated with altered cofilin phosphorylation. Unlike their wild-type counterparts, caspase-11−/− neutrophils also failed to produce neutrophil extracellular traps (NETs) when treated with MSU. Together, this is the first report demonstrating that caspase-11 promotes neutrophil directional trafficking and function in an acute model of gout. Caspase-11 also governs the production of inflammasome-dependent and -independent cytokines from macrophages. Our results offer new, previously unrecognized functions for caspase-11 in macrophages and neutrophils that may apply to other neutrophil-mediated disease conditions besides gout.
Collapse
Affiliation(s)
- Kyle Caution
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Nicholas Young
- Department of Rheumatology and Immunology, The Ohio State University Medical Center, Columbus, OH, United States
| | - Frank Robledo-Avila
- Center for Microbial Pathogenesis, Nationwide Children's Hospital, Columbus, OH, United States
| | - Kathrin Krause
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Arwa Abu Khweek
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States.,Department of Biology and Biochemistry, Birzeit University, West Bank, Palestine
| | - Kaitlin Hamilton
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Asmaa Badr
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Anup Vaidya
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Kylene Daily
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Hawin Gosu
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Midhun N K Anne
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Mostafa Eltobgy
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Duaa Dakhlallah
- Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV, United States
| | - Sudha Argwal
- Department of Rheumatology and Immunology, The Ohio State University Medical Center, Columbus, OH, United States
| | - Shady Estfanous
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| | - Xiaoli Zhang
- Center for Biostatistics, The Ohio State University Medical Center, Columbus, OH, United States
| | | | - Mikhail A Gavrilin
- Department of Internal Medicine, The Ohio State University Medical Center, Columbus, OH, United States
| | - Wael N Jarjour
- Department of Rheumatology and Immunology, The Ohio State University Medical Center, Columbus, OH, United States
| | - Amal O Amer
- Department of Microbial Infection and Immunity, The Ohio State University Medical Center, Columbus, OH, United States
| |
Collapse
|
20
|
Rosenjack J, Hodges CA, Darrah RJ, Kelley TJ. HDAC6 depletion improves cystic fibrosis mouse airway responses to bacterial challenge. Sci Rep 2019; 9:10282. [PMID: 31311988 PMCID: PMC6635416 DOI: 10.1038/s41598-019-46555-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/29/2019] [Indexed: 02/07/2023] Open
Abstract
The hypothesis of this study was that Hdac6 depletion would restore cystic fibrosis (CF) responses to bacterial challenge to more wild type profiles using a CF mouse model. CF mice harboring the F508del Cftr mutation respond to bacterial challenge with 25,000 CFU Pseudomonas aeruginosa embedded into agarose beads to slow clearance. CF mice respond significantly more aggressively to this challenge compared to WT mice with respect to bacterial clearance, weight loss, neutrophil recruitment, and MIP-2 production. Depletion of Hdac6 expression in the CF mice (CF/Hdac6) significantly improves these responses to more WT levels. Weight loss in response to infection is most severe in CF mice and significantly attenuated in CF/Hdac6 mice. Bacterial levels are reduced at a faster rate in CF/Hdac6 mice compared to CF mice where infection persists. Percent neutrophils in lung lavage fluid post-infection are significantly higher in CF mice, but returned to WT levels with CF/Hdac6 mice. Similarly, CF Mip-2 levels are restored to WT levels in the absence of Hdac6 expression. These data demonstrate that Hdac6 depletion restores CF responses to bacterial challenge to WT-like profiles and offer a potential therapeutic avenue for addressing inflammation and infection in CF airways independently of Cftr correction.
Collapse
Affiliation(s)
- Julie Rosenjack
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA
| | - Craig A Hodges
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA
| | - Rebecca J Darrah
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA
| | - Thomas J Kelley
- Departments of Pediatrics, Case Western Reserve University Cleveland, Ohio, USA.
| |
Collapse
|
21
|
Maiuri L, Raia V, Piacentini M, Tosco A, Villella VR, Kroemer G. Cystic fibrosis transmembrane conductance regulator (CFTR) and autophagy: hereditary defects in cystic fibrosis versus gluten-mediated inhibition in celiac disease. Oncotarget 2019; 10:4492-4500. [PMID: 31321000 PMCID: PMC6633896 DOI: 10.18632/oncotarget.27037] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 06/05/2019] [Indexed: 12/31/2022] Open
Abstract
Cystic Fibrosis (CF) is the most frequent lethal monogenetic disease affecting humans. CF is characterized by mutations in cystic fibrosis transmembrane conductance regulator (CFTR), a chloride channel whose malfunction triggers the activation of transglutaminase-2 (TGM2), as well as the inactivation of the Beclin-1 (BECN1) complex resulting in disabled autophagy. CFTR inhibition, TGM2 activation and BECN1 sequestration engage in an ‘infernal trio’ that locks the cell in a pro-inflammatory state through anti-homeostatic feedforward loops. Thus, stimulation of CFTR function, TGM2 inhibition and autophagy stimulation can be used to treat CF patients. Several studies indicate that patients with CF have a higher incidence of celiac disease (CD) and that mice bearing genetically determined CFTR defects are particularly sensitive to the enteropathogenic effects of the orally supplied gliadin (a gluten-derived protein). A gluten/gliadin-derived peptide (P31–43) inhibits CFTR in mouse intestinal epithelial cells, causing a local stress response that contributes to the immunopathology of CD. In particular, P31–43-induced CFTR inhibition elicits an epithelial stress response perturbing proteostasis. This event triggers TGM2 activation, BECN1 sequestration and results in molecular crosslinking of CFTR and P31-43 by TGM2. Importantly, stimulation of CFTR function with a pharmacological potentiator (Ivacaftor), which is approved for the treatment of CF, could attenuate the autophagy-inhibition and pro-inflammatory effects of gliadin in preclinical models of CD. Thus, CD shares with CF a common molecular mechanism involving CFTR inhibition that might respond to drugs that intercept the "infernal trio". Here, we highlight how drugs available for CF treatment could be repurposed for the therapy of CD.
Collapse
Affiliation(s)
- Luigi Maiuri
- Department of Health Sciences, University of Eastern Piedmont, Novara, Italy.,European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy
| | - Valeria Raia
- Department of Translational Medical Sciences, Pediatric Unit, Regional Cystic Fibrosis Center, Federico II University Naples, Naples, Italy
| | - Mauro Piacentini
- Department of Biology, University of Rome "Tor Vergata", Rome, Italy.,National Institute for Infectious Diseases, IRCCS 'L. Spallanzani', Rome, Italy
| | - Antonella Tosco
- Department of Translational Medical Sciences, Pediatric Unit, Regional Cystic Fibrosis Center, Federico II University Naples, Naples, Italy
| | - Valeria Rachela Villella
- European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy
| | - Guido Kroemer
- Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM U1138, Centre de Recherche des Cordeliers, Paris, France.,Université Paris Descartes/Paris V, Sorbonne Paris Cité, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France.,Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France.,Department of Women's and Children's Health, Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden.,Suzhou Institute for Systems Medicine, Chinese Academy of Sciences, Suzhou, China
| |
Collapse
|
22
|
Methylomic correlates of autophagy activity in cystic fibrosis. J Cyst Fibros 2019; 18:491-500. [PMID: 30737168 DOI: 10.1016/j.jcf.2019.01.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 12/16/2022]
Abstract
Autophagy is a highly regulated, biological process that provides energy during periods of stress and starvation. This conserved process also acts as a defense mechanism and clears microbes from the host cell. Autophagy is impaired in Cystic Fibrosis (CF) patients and CF mice, as their cells exhibit low expression levels of essential autophagy molecules. The genetic disorder in CF is due to mutations in the cystic fibrosis transmembrane conductance regulator (cftr) gene that encodes for a chloride channel. CF patients are particularly prone to infection by pathogens that are otherwise cleared by autophagy in healthy immune cells including Burkholderia cenocepacia (B. cenocepacia). The objective of this study is to determine the mechanism underlying weak autophagic activity in CF macrophages and find therapeutic targets to correct it. Using reduced representation bisulfite sequencing (RRBS) to determine DNA methylation profile, we found that the promoter regions of Atg12 in CF macrophages are significantly more methylated than in the wild-type (WT) immune cells, accompanied by low protein expression. The natural product epigallocatechin-3-gallate (EGCG) significantly reduced the methylation of Atg12 promoter improving its expression. Accordingly, EGCG restricted B. cenocepacia replication within CF mice and their derived macrophages by improving autophagy and preventing dissemination. In addition, EGCG improved the function of CFTR protein. Altogether, utilizing RRBS for the first time in the CF field revealed a previously unrecognized mechanism for reduced autophagic activity in CF. Our data also offers a mechanism by which EGCG exerts its positive effects in CF.
Collapse
|
23
|
Protective Features of Autophagy in Pulmonary Infection and Inflammatory Diseases. Cells 2019; 8:cells8020123. [PMID: 30717487 PMCID: PMC6406971 DOI: 10.3390/cells8020123] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 12/12/2022] Open
Abstract
Autophagy is a highly conserved catabolic process involving autolysosomal degradation of cellular components, including protein aggregates, damaged organelles (such as mitochondria, endoplasmic reticulum, and others), as well as various pathogens. Thus, the autophagy pathway represents a major adaptive response for the maintenance of cellular and tissue homeostasis in response to numerous cellular stressors. A growing body of evidence suggests that autophagy is closely associated with diverse human diseases. Specifically, acute lung injury (ALI) and inflammatory responses caused by bacterial infection or xenobiotic inhalation (e.g., chlorine and cigarette smoke) have been reported to involve a spectrum of alterations in autophagy phenotypes. The role of autophagy in pulmonary infection and inflammatory diseases could be protective or harmful dependent on the conditions. In this review, we describe recent advances regarding the protective features of autophagy in pulmonary diseases, with a focus on ALI, idiopathic pulmonary fibrosis (IPF), chronic obstructive pulmonary disease (COPD), tuberculosis, pulmonary arterial hypertension (PAH) and cystic fibrosis.
Collapse
|
24
|
Bodas M, Vij N. Adapting Proteostasis and Autophagy for Controlling the Pathogenesis of Cystic Fibrosis Lung Disease. Front Pharmacol 2019; 10:20. [PMID: 30774592 PMCID: PMC6367269 DOI: 10.3389/fphar.2019.00020] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/09/2019] [Indexed: 12/20/2022] Open
Abstract
Cystic fibrosis (CF), a fatal genetic disorder predominant in the Caucasian population, is caused by mutations in the cystic fibrosis transmembrane conductance regulator (Cftr) gene. The most common mutation is the deletion of phenylalanine from the position-508 (F508del-CFTR), resulting in a misfolded-CFTR protein, which is unable to fold, traffic and retain its plasma membrane (PM) localization. The resulting CFTR dysfunction, dysregulates variety of key cellular mechanisms such as chloride ion transport, airway surface liquid (ASL) homeostasis, mucociliary-clearance, inflammatory-oxidative signaling, and proteostasis that includes ubiquitin-proteasome system (UPS) and autophagy. A collective dysregulation of these key homoeostatic mechanisms contributes to the development of chronic obstructive cystic fibrosis lung disease, instead of the classical belief focused exclusively on ion-transport defect. Hence, therapeutic intervention(s) aimed at rescuing chronic CF lung disease needs to correct underlying defect that mediates homeostatic dysfunctions and not just chloride ion transport. Since targeting all the myriad defects individually could be quite challenging, it will be prudent to identify a process which controls almost all disease-promoting processes in the CF airways including underlying CFTR dysfunction. There is emerging experimental and clinical evidence that supports the notion that impaired cellular proteostasis and autophagy plays a central role in regulating pathogenesis of chronic CF lung disease. Thus, correcting the underlying proteostasis and autophagy defect in controlling CF pulmonary disease, primarily via correcting the protein processing defect of F508del-CFTR protein has emerged as a novel intervention strategy. Hence, we discuss here both the rationale and significant therapeutic utility of emerging proteostasis and autophagy modulating drugs/compounds in controlling chronic CF lung disease, where targeted delivery is a critical factor-influencing efficacy.
Collapse
Affiliation(s)
- Manish Bodas
- Department of Medicine, University of Oklahoma, Oklahoma City, OK, United States
| | - Neeraj Vij
- Department of Pediatric Pulmonary Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States.,4Dx Limited, Los Angeles, CA, United States.,VIJ Biotech LLC, Baltimore, MD, United States
| |
Collapse
|
25
|
Saikh KU, Dankmeyer JL, Zeng X, Ulrich RG, Amemiya K. An increase in intracellular p62/NBR1 and persistence of Burkholderia mallei and B. pseudomallei in infected mice linked to autophagy deficiency. IMMUNITY INFLAMMATION AND DISEASE 2018; 7:7-21. [PMID: 30569531 PMCID: PMC6416765 DOI: 10.1002/iid3.239] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 10/22/2018] [Accepted: 10/26/2018] [Indexed: 12/30/2022]
Abstract
Introduction Burkholderia mallei (B. mallei) and Burkholderia pseudomallei (B. pseudomallei), causative agents of glanders and melioidosis, respectively, are invasive intracellular pathogens that actively multiply in phagocytic and non‐phagocytic cells. Activation of cell‐autonomous autophagy mechanism eliminate intracellular pathogens in which p62 a cytosolic cargo protein is selectively degraded, and an accumulation of this marker occurs if autophagy is deficient. Recurrent, relapsed and reinfection of B. pseudomallei in melioidosis patients in endemic area indicative of lack of complete of clearance and persistence of the pathogen. Reasoning that abundance in the levels of p62 may provide an indication of the intracellular infection, we sought to examine whether increase in intracellular p62 and bacterial burden with Burkholderia infection are linked to autophagy deficiency. Methods In this study, we investigated cell culture and mouse models of disease to identify an association between autophagy biomarkers (p62/NBR1) accumulation and intracellular persistence of B. mallei and B. pseudomallei. Results We demonstrate, that elevated levels of intracellular p62/NBR1 correlated with bacterial persistence, while pre‐treatment with a pharmacological inducer of autophagy, rapamycin, reduced both intracellular p62, and bacterial survival. Our results showed an elevated p62 levels (2‐5 fold) in spleen and liver cells of Burkholderia‐infected BALB/c mice, as well as in spleen cells of Burkholderia‐infected C57BL/6 mice, suggesting that an increase in p62/NBR1 was due to an autophagy deficiency. Similar to p62, cytosolic LC3‐I levels were also elevated, while the characteristic conversion to the autophagosome‐associated membrane bound form LC3‐II was low in spleens of the infected mice further supporting the conclusion that autophagy was deficient. Conclusion Taken together, our results suggest that an increase in intracellular p62/NBR1 may be a potential host cell biomarker of B. mallei or B. pseudomallei infections, and identifying autophagy manipulation may potentially aid to therapeutic approach for complete clearance of the pathogen.
Collapse
Affiliation(s)
- Kamal U Saikh
- Department of Immunology, Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| | - Jennifer L Dankmeyer
- Department of Bacteriology, Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| | - Xiankun Zeng
- Department of Pathology, Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| | - Robert G Ulrich
- Department of Immunology, Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| | - Kei Amemiya
- Department of Bacteriology, Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| |
Collapse
|
26
|
Krause K, Caution K, Badr A, Hamilton K, Saleh A, Patel K, Seveau S, Hall-Stoodley L, Hegazi R, Zhang X, Gavrilin MA, Amer AO. CASP4/caspase-11 promotes autophagosome formation in response to bacterial infection. Autophagy 2018; 14:1928-1942. [PMID: 30165781 PMCID: PMC6152495 DOI: 10.1080/15548627.2018.1491494] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
CASP4/caspase-11-dependent inflammasome activation is important for the clearance of various Gram-negative bacteria entering the host cytosol. Additionally, CASP4 modulates the actin cytoskeleton to promote the maturation of phagosomes harboring intracellular pathogens such as Legionella pneumophila but not those enclosing nonpathogenic bacteria. Nevertheless, this non-inflammatory role of CASP4 regarding the trafficking of vacuolar bacteria remains poorly understood. Macroautophagy/autophagy, a catabolic process within eukaryotic cells, is also implicated in the elimination of intracellular pathogens such as Burkholderia cenocepacia. Here we show that CASP4-deficient macrophages exhibit a defect in autophagosome formation in response to B. cenocepacia infection. The absence of CASP4 causes an accumulation of the small GTPase RAB7, reduced colocalization of B. cenocepacia with LC3 and acidic compartments accompanied by increased bacterial replication in vitro and in vivo. Together, our data reveal a novel role of CASP4 in regulating autophagy in response to B. cenocepacia infection.
Collapse
Affiliation(s)
- Kathrin Krause
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Kyle Caution
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Asmaa Badr
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Kaitlin Hamilton
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Abdulmuti Saleh
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Khushbu Patel
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Stephanie Seveau
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Luanne Hall-Stoodley
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Rana Hegazi
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| | - Xiaoli Zhang
- b Center for Biostatistics, The Ohio State University , Columbus , OH , USA
| | - Mikhail A Gavrilin
- c Department of Internal Medicine , The Ohio State University , Columbus , OH , USA
| | - Amal O Amer
- a Department of Microbial Infection and Immunity , Infectious Diseases Institute , Columbus , OH , USA
| |
Collapse
|
27
|
Rossin F, Villella VR, D'Eletto M, Farrace MG, Esposito S, Ferrari E, Monzani R, Occhigrossi L, Pagliarini V, Sette C, Cozza G, Barlev NA, Falasca L, Fimia GM, Kroemer G, Raia V, Maiuri L, Piacentini M. TG2 regulates the heat-shock response by the post-translational modification of HSF1. EMBO Rep 2018; 19:embr.201745067. [PMID: 29752334 DOI: 10.15252/embr.201745067] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 03/24/2018] [Accepted: 04/13/2018] [Indexed: 01/24/2023] Open
Abstract
Heat-shock factor 1 (HSF1) is the master transcription factor that regulates the response to proteotoxic stress by controlling the transcription of many stress-responsive genes including the heat-shock proteins. Here, we show a novel molecular mechanism controlling the activation of HSF1. We demonstrate that transglutaminase type 2 (TG2), dependent on its protein disulphide isomerase activity, triggers the trimerization and activation of HSF1 regulating adaptation to stress and proteostasis impairment. In particular, we find that TG2 loss of function correlates with a defect in the nuclear translocation of HSF1 and in its DNA-binding ability to the HSP70 promoter. We show that the inhibition of TG2 restores the unbalance in HSF1-HSP70 pathway in cystic fibrosis (CF), a human disorder characterized by deregulation of proteostasis. The absence of TG2 leads to an increase of about 40% in CFTR function in a new experimental CF mouse model lacking TG2. Altogether, these results indicate that TG2 plays a key role in the regulation of cellular proteostasis under stressful cellular conditions through the modulation of the heat-shock response.
Collapse
Affiliation(s)
- Federica Rossin
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy
| | - Valeria Rachela Villella
- Division of Genetics and Cell Biology, European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy
| | - Manuela D'Eletto
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy
| | | | - Speranza Esposito
- Division of Genetics and Cell Biology, European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy
| | - Eleonora Ferrari
- Division of Genetics and Cell Biology, European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy
| | - Romina Monzani
- Division of Genetics and Cell Biology, European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy
| | - Luca Occhigrossi
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy
| | - Vittoria Pagliarini
- Department of Biomedicine and Prevention, University of Rome 'Tor Vergata', Rome, Italy.,Laboratory of Neuroembryology, Fondazione Santa Lucia, Rome, Italy
| | - Claudio Sette
- Department of Biomedicine and Prevention, University of Rome 'Tor Vergata', Rome, Italy.,Laboratory of Neuroembryology, Fondazione Santa Lucia, Rome, Italy
| | - Giorgio Cozza
- Department of Molecular Medicine, University of Padua, Padova, Italy
| | - Nikolai A Barlev
- Gene Expression Laboratory, Institute of Cytology, Saint-Petersburg, Russia
| | - Laura Falasca
- National Institute for Infectious Diseases IRCCS 'L. Spallanzani', Rome, Italy
| | - Gian Maria Fimia
- National Institute for Infectious Diseases IRCCS 'L. Spallanzani', Rome, Italy.,Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Lecce, Italy
| | - Guido Kroemer
- Sorbonne Paris Cité, Université Paris Descartes, Paris, France.,Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,Institut National de la Santé et de la Recherche Médicale, U1138, Paris, France.,Université Pierre et Marie Curie, Paris, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France.,Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden
| | - Valeria Raia
- Regional Cystic Fibrosis Center, Pediatric Unit, Department of Translational Medical Sciences, Federico II University, Naples, Italy
| | - Luigi Maiuri
- Division of Genetics and Cell Biology, European Institute for Research in Cystic Fibrosis, San Raffaele Scientific Institute, Milan, Italy.,SCDU of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
| | - Mauro Piacentini
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy .,National Institute for Infectious Diseases IRCCS 'L. Spallanzani', Rome, Italy
| |
Collapse
|
28
|
Seveau S, Turner J, Gavrilin MA, Torrelles JB, Hall-Stoodley L, Yount JS, Amer AO. Checks and Balances between Autophagy and Inflammasomes during Infection. J Mol Biol 2017; 430:174-192. [PMID: 29162504 DOI: 10.1016/j.jmb.2017.11.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 11/05/2017] [Accepted: 11/09/2017] [Indexed: 12/24/2022]
Abstract
Autophagy and inflammasome complex assembly are physiological processes that control homeostasis, inflammation, and immunity. Autophagy is a ubiquitous pathway that degrades cytosolic macromolecules or organelles, as well as intracellular pathogens. Inflammasomes are multi-protein complexes that assemble in the cytosol of cells upon detection of pathogen- or danger-associated molecular patterns. A critical outcome of inflammasome assembly is the activation of the cysteine protease caspase-1, which activates the pro-inflammatory cytokine precursors pro-IL-1β and pro-IL-18. Studies on chronic inflammatory diseases, heart diseases, Alzheimer's disease, and multiple sclerosis revealed that autophagy and inflammasomes intersect and regulate each other. In the context of infectious diseases, however, less is known about the interplay between autophagy and inflammasome assembly, although it is becoming evident that pathogens have evolved multiple strategies to inhibit and/or subvert these pathways and to take advantage of their intricate crosstalk. An improved appreciation of these pathways and their subversion by diverse pathogens is expected to help in the design of anti-infective therapeutic interventions.
Collapse
Affiliation(s)
- Stephanie Seveau
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA; Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA.
| | - Joanne Turner
- Texas Biomedical Research Institute, San Antonio, TX 78227, USA
| | - Mikhail A Gavrilin
- Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA; Department of Internal Medicine, College of Medicine, The Ohio State University, Columbus, OH, USA
| | | | - Luanne Hall-Stoodley
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA; Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA
| | - Jacob S Yount
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA; Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA
| | - Amal O Amer
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA; Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA
| |
Collapse
|
29
|
Tazi MF, Dakhlallah DA, Caution K, Gerber MM, Chang SW, Khalil H, Kopp BT, Ahmed AE, Krause K, Davis I, Marsh C, Lovett-Racke AE, Schlesinger LS, Cormet-Boyaka E, Amer AO. Elevated Mirc1/Mir17-92 cluster expression negatively regulates autophagy and CFTR (cystic fibrosis transmembrane conductance regulator) function in CF macrophages. Autophagy 2017; 12:2026-2037. [PMID: 27541364 DOI: 10.1080/15548627.2016.1217370] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Cystic fibrosis (CF) is a fatal, genetic disorder that critically affects the lungs and is directly caused by mutations in the CF transmembrane conductance regulator (CFTR) gene, resulting in defective CFTR function. Macroautophagy/autophagy is a highly regulated biological process that provides energy during periods of stress and starvation. Autophagy clears pathogens and dysfunctional protein aggregates within macrophages. However, this process is impaired in CF patients and CF mice, as their macrophages exhibit limited autophagy activity. The study of microRNAs (Mirs), and other noncoding RNAs, continues to offer new therapeutic targets. The objective of this study was to elucidate the role of Mirs in dysregulated autophagy-related genes in CF macrophages, and then target them to restore this host-defense function and improve CFTR channel function. We identified the Mirc1/Mir17-92 cluster as a potential negative regulator of autophagy as CF macrophages exhibit decreased autophagy protein expression and increased cluster expression when compared to wild-type (WT) counterparts. The absence or reduced expression of the cluster increases autophagy protein expression, suggesting the canonical inverse relationship between Mirc1/Mir17-92 and autophagy gene expression. An in silico study for targets of Mirs that comprise the cluster suggested that the majority of the Mirs target autophagy mRNAs. Those targets were validated by luciferase assays. Notably, the ability of macrophages expressing mutant F508del CFTR to transport halide through their membranes is compromised and can be restored by downregulation of these inherently elevated Mirs, via restoration of autophagy. In vivo, downregulation of Mir17 and Mir20a partially restored autophagy expression and hence improved the clearance of Burkholderia cenocepacia. Thus, these data advance our understanding of mechanisms underlying the pathobiology of CF and provide a new therapeutic platform for restoring CFTR function and autophagy in patients with CF.
Collapse
Affiliation(s)
- Mia F Tazi
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA.,b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Duaa A Dakhlallah
- b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Kyle Caution
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA.,b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Madelyn M Gerber
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA.,b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Sheng-Wei Chang
- b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA.,c Department of Veterinary Biosciences , The Ohio State University , Columbus , OH , USA
| | - Hany Khalil
- d Department of Molecular Biology, Genetic Engineering and Biotechnology Research Institute , University of Sadat City , Egypt
| | | | - Amr E Ahmed
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA.,b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Kathrin Krause
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA.,b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Ian Davis
- c Department of Veterinary Biosciences , The Ohio State University , Columbus , OH , USA
| | - Clay Marsh
- b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Amy E Lovett-Racke
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA
| | - Larry S Schlesinger
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA.,b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| | - Estelle Cormet-Boyaka
- b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA.,c Department of Veterinary Biosciences , The Ohio State University , Columbus , OH , USA
| | - Amal O Amer
- a Department of Microbial Infection and Immunity, Center for Microbial Interface Biology , The Ohio State University , Columbus , OH , USA.,b Davis Heart and Lung Research Institute , The Ohio State University , Columbus , OH , USA
| |
Collapse
|
30
|
Cysteamine-mediated clearance of antibiotic-resistant pathogens in human cystic fibrosis macrophages. PLoS One 2017; 12:e0186169. [PMID: 28982193 PMCID: PMC5642023 DOI: 10.1371/journal.pone.0186169] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 09/26/2017] [Indexed: 02/07/2023] Open
Abstract
Members of the Burkholderia cepacia complex are virulent, multi-drug resistant pathogens that survive and replicate intracellularly in patients with cystic fibrosis (CF). We have discovered that B. cenocepacia cannot be cleared from CF macrophages due to defective autophagy, causing continued systemic inflammation and infection. Defective autophagy in CF is mediated through constitutive reactive oxygen species (ROS) activation of transglutaminase-2 (TG2), which causes the sequestration (accumulation) of essential autophagy initiating proteins. Cysteamine is a TG2 inhibitor and proteostasis regulator with the potential to restore autophagy. Therefore, we sought to examine the impact of cysteamine on CF macrophage autophagy and bacterial killing. Human peripheral blood monocyte-derived macrophages (MDMs) and alveolar macrophages were isolated from CF and non-CF donors. Macrophages were infected with clinical isolates of relevant CF pathogens. Cysteamine caused direct bacterial growth killing of live B. cenocepacia, B. multivorans, P. aeruginosa and MRSA in the absence of cells. Additionally, B. cenocepacia, B. multivorans, and P. aeruginosa invasion were significantly decreased in CF MDMs treated with cysteamine. Finally, cysteamine decreased TG2, p62, and beclin-1 accumulation in CF, leading to increased Burkholderia uptake into autophagosomes, increased macrophage CFTR expression, and decreased ROS and IL-1β production. Cysteamine has direct anti-bacterial growth killing and improves human CF macrophage autophagy resulting in increased macrophage-mediated bacterial clearance, decreased inflammation, and reduced constitutive ROS production. Thus, cysteamine may be an effective adjunct to antibiotic regimens in CF.
Collapse
|
31
|
Strategies for the etiological therapy of cystic fibrosis. Cell Death Differ 2017; 24:1825-1844. [PMID: 28937684 PMCID: PMC5635223 DOI: 10.1038/cdd.2017.126] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 12/14/2022] Open
Abstract
Etiological therapies aim at repairing the underlying cause of cystic fibrosis (CF), which is the functional defect of the cystic fibrosis transmembrane conductance regulator (CFTR) protein owing to mutations in the CFTR gene. Among these, the F508del CFTR mutation accounts for more than two thirds of CF cases worldwide. Two somehow antinomic schools of thought conceive CFTR repair in a different manner. According to one vision, drugs should directly target the mutated CFTR protein to increase its plasma membrane expression (correctors) or improve its ion transport function (potentiators). An alternative strategy consists in modulating the cellular environment and proteostasis networks in which the mutated CFTR protein is synthesized, traffics to its final destination, the plasma membrane, and is turned over. We will analyze distinctive advantages and drawbacks of these strategies in terms of their scientific and clinical dimensions, and we will propose a global strategy for CF research and development based on a reconciliatory approach. Moreover, we will discuss the utility of preclinical biomarkers that may guide the personalized, patient-specific implementation of CF therapies.
Collapse
|
32
|
Affiliation(s)
- Tracey Bonfield
- Rainbow Babies and Children's Hospital, 11100 Euclid Avenue, Cleveland, OH 44106, USA; Case Western Reserve University School of Medicine, 2109 Adelbert Road, Cleveland, OH 44106, USA
| | - James F Chmiel
- Rainbow Babies and Children's Hospital, 11100 Euclid Avenue, Cleveland, OH 44106, USA; Case Western Reserve University School of Medicine, 2109 Adelbert Road, Cleveland, OH 44106, USA.
| |
Collapse
|
33
|
Ferrari E, Monzani R, Villella VR, Esposito S, Saluzzo F, Rossin F, D'Eletto M, Tosco A, De Gregorio F, Izzo V, Maiuri MC, Kroemer G, Raia V, Maiuri L. Cysteamine re-establishes the clearance of Pseudomonas aeruginosa by macrophages bearing the cystic fibrosis-relevant F508del-CFTR mutation. Cell Death Dis 2017; 8:e2544. [PMID: 28079883 PMCID: PMC5386380 DOI: 10.1038/cddis.2016.476] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/17/2016] [Accepted: 12/16/2016] [Indexed: 12/19/2022]
Abstract
Cystic fibrosis (CF), the most common lethal monogenic disease in Caucasians, is characterized by recurrent bacterial infections and colonization, mainly by Pseudomonas aeruginosa, resulting in unresolved airway inflammation. CF is caused by mutations in the gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein, which functions as a chloride channel in epithelial cells, macrophages, and other cell types. Impaired bacterial handling by macrophages is a feature of CF airways, although it is still debated how defective CFTR impairs bacterial killing. Recent evidence indicates that a defective autophagy in CF macrophages leads to alterations of bacterial clearance upon infection. Here we use bone marrow-derived macrophages from transgenic mice to provide the genetic proof that defective CFTR compromises both uptake and clearance of internalized Pseudomonas aeruginosa. We demonstrate that the proteostasis regulator cysteamine, which rescues the function of the most common F508del-CFTR mutant and hence reduces lung inflammation in CF patients, can also repair the defects of CF macrophages, thus restoring both bacterial internalization and clearance through a process that involves upregulation of the pro-autophagic protein Beclin 1 and re-establishment of the autophagic pathway. Altogether these results indicate that cysteamine restores the function of several distinct cell types, including that of macrophages, which might contribute to its beneficial effects on CF.
Collapse
Affiliation(s)
- Eleonora Ferrari
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, European Institute for Research in Cystic Fibrosis, Milan 20132, Italy
| | - Romina Monzani
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, European Institute for Research in Cystic Fibrosis, Milan 20132, Italy
| | - Valeria R Villella
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, European Institute for Research in Cystic Fibrosis, Milan 20132, Italy
| | - Speranza Esposito
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, European Institute for Research in Cystic Fibrosis, Milan 20132, Italy
| | - Francesca Saluzzo
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, European Institute for Research in Cystic Fibrosis, Milan 20132, Italy
| | - Federica Rossin
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy
| | - Manuela D'Eletto
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy
| | - Antonella Tosco
- Regional Cystic Fibrosis Center, Pediatric Unit, Department of Translational Medical Sciences, FedericoII University Naples 80131, Italy
| | - Fabiola De Gregorio
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, European Institute for Research in Cystic Fibrosis, Milan 20132, Italy.,Regional Cystic Fibrosis Center, Pediatric Unit, Department of Translational Medical Sciences, FedericoII University Naples 80131, Italy
| | - Valentina Izzo
- Equipe11 labellisée Ligue Nationale contrele Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Maria C Maiuri
- Equipe11 labellisée Ligue Nationale contrele Cancer, Centre de Recherche des Cordeliers, Paris, France
| | - Guido Kroemer
- Equipe11 labellisée Ligue Nationale contrele Cancer, Centre de Recherche des Cordeliers, Paris, France.,INSERM U1138, Centre de Recherche des Cordeliers, Paris, France.,Université Paris Descartes, Paris, France.,Metabolomics and Cell Biology Platforms, Institut Gustave Roussy, Villejuif, France.,Pôlede Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, Franceand.,Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, Stockholm 17176, Sweden
| | - Valeria Raia
- Regional Cystic Fibrosis Center, Pediatric Unit, Department of Translational Medical Sciences, FedericoII University Naples 80131, Italy
| | - Luigi Maiuri
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, European Institute for Research in Cystic Fibrosis, Milan 20132, Italy.,SCDU of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Novara 28100, Italy
| |
Collapse
|
34
|
Cystic fibrosis lung environment and Pseudomonas aeruginosa infection. BMC Pulm Med 2016; 16:174. [PMID: 27919253 PMCID: PMC5139081 DOI: 10.1186/s12890-016-0339-5] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/24/2016] [Indexed: 12/20/2022] Open
Abstract
Background The airways of patients with cystic fibrosis (CF) are highly complex, subject to various environmental conditions as well as a distinct microbiota. Pseudomonas aeruginosa is recognized as one of the most important pulmonary pathogens and the predominant cause of morbidity and mortality in CF. A multifarious interplay between the host, pathogens, microbiota, and the environment shapes the course of the disease. There have been several excellent reviews detailing CF pathology, Pseudomonas and the role of environment in CF but only a few reviews connect these entities with regards to influence on the overall course of the disease. A holistic understanding of contributing factors is pertinent to inform new research and therapeutics. Discussion In this article, we discuss the deterministic alterations in lung physiology as a result of CF. We also revisit the impact of those changes on the microbiota, with special emphasis on P. aeruginosa and the influence of other non-genetic factors on CF. Substantial past and current research on various genetic and non-genetic aspects of cystic fibrosis has been reviewed to assess the effect of different factors on CF pulmonary infection. A thorough review of contributing factors in CF and the alterations in lung physiology indicate that CF lung infection is multi-factorial with no isolated cause that should be solely targeted to control disease progression. A combinatorial approach may be required to ensure better disease outcomes. Conclusion CF lung infection is a complex disease and requires a broad multidisciplinary approach to improve CF disease outcomes. A holistic understanding of the underlying mechanisms and non-genetic contributing factors in CF is central to development of new and targeted therapeutic strategies.
Collapse
|
35
|
The impact of impaired macrophage functions in cystic fibrosis disease progression. J Cyst Fibros 2016; 16:443-453. [PMID: 27856165 DOI: 10.1016/j.jcf.2016.10.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/21/2016] [Accepted: 10/23/2016] [Indexed: 01/29/2023]
Abstract
The underlying cause of morbidity in cystic fibrosis (CF) is the decline in lung function, which results in part from chronic inflammation. Inflammation and infection occur early in infancy in CF and the role of innate immune defense in CF has been highlighted in the last years. Once thought simply to be consumers of bacteria, macrophages have emerged as highly sensitive immune cells that are located at the balance point between inflammation and resolution of this inflammation in CF pathophysiology. In order to assess the potential role of macrophage in CF, we review the evidence that: (1) CF macrophage has a dysregulated inflammatory phenotype; (2) CF macrophage presents altered phagocytosis capacity and bacterial killing; and (3) lipid disorders in CF macrophage affect its function. These alterations of macrophage weaken innate defense of CF patients and may be involved in CF disease progression and lung damage.
Collapse
|
36
|
Lenzi P, Lazzeri G, Biagioni F, Busceti CL, Gambardella S, Salvetti A, Fornai F. The Autophagoproteasome a Novel Cell Clearing Organelle in Baseline and Stimulated Conditions. Front Neuroanat 2016; 10:78. [PMID: 27493626 PMCID: PMC4955296 DOI: 10.3389/fnana.2016.00078] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 07/05/2016] [Indexed: 12/24/2022] Open
Abstract
Protein clearing pathways named autophagy (ATG) and ubiquitin proteasome (UP) control homeostasis within eukaryotic cells, while their dysfunction produces neurodegeneration. These pathways are viewed as distinct biochemical cascades occurring within specific cytosolic compartments owing pathway-specific enzymatic activity. Recent data strongly challenged the concept of two morphologically distinct and functionally segregated compartments. In fact, preliminary evidence suggests the convergence of these pathways to form a novel organelle named autophagoproteasome. This is characterized in the present study by using a cell line where, mTOR activity is upregulated and autophagy is suppressed. This was reversed dose-dependently by administering the mTOR inhibitor rapamycin. Thus, we could study autophagoproteasomes when autophagy was either suppressed or stimulated. The occurrence of autophagoproteasome was shown also in non-human cell lines. Ultrastructural morphometry, based on the stochiometric binding of immunogold particles allowed the quantitative evaluation of ATG and UP component within autophagoproteasomes. The number of autophagoproteasomes increases following mTOR inhibition. Similarly, mTOR inhibition produces overexpression of both LC3 and P20S particles. This is confirmed by the fact that the ratio of free vs. autophagosome-bound LC3 is similar to that measured for P20S, both in baseline conditions and following mTOR inhibition. Remarkably, within autophagoproteasomes there is a slight prevalence of ATG compared with UP components for low rapamycin doses, whereas for higher rapamycin doses UP increases more than ATG. While LC3 is widely present within cytosol, UP is strongly polarized within autophagoproteasomes. These fine details were evident at electron microscopy but could not be deciphered by using confocal microscopy. Despite its morphological novelty autophagoproteasomes appear in the natural site where clearing pathways (once believed to be anatomically segregated) co-exist and they are likely to interact at molecular level. In fact, LC3 and P20S co-immunoprecipitate, suggesting a specific binding and functional interplay, which may be altered by inhibiting mTOR. In summary, ATG and UP often represent two facets of a single organelle, in which unexpected amount of enzymatic activity should be available. Thus, autophagoproteasome may represent a sophisticated ultimate clearing apparatus.
Collapse
Affiliation(s)
- Paola Lenzi
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa Pisa, Italy
| | - Gloria Lazzeri
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa Pisa, Italy
| | - Francesca Biagioni
- Istituti di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.), Neuromed Pozzilli, Italy
| | - Carla L Busceti
- Istituti di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.), Neuromed Pozzilli, Italy
| | - Stefano Gambardella
- Istituti di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.), Neuromed Pozzilli, Italy
| | - Alessandra Salvetti
- Department of Clinical and Experimental Medicine, University of Pisa Pisa, Italy
| | - Francesco Fornai
- Department of Translational Research and New Technologies in Medicine and Surgery, University of PisaPisa, Italy; Istituti di Ricovero e Cura a Carattere Scientifico (I.R.C.C.S.), NeuromedPozzilli, Italy
| |
Collapse
|
37
|
Bruscia EM, Bonfield TL. Cystic Fibrosis Lung Immunity: The Role of the Macrophage. J Innate Immun 2016; 8:550-563. [PMID: 27336915 DOI: 10.1159/000446825] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 05/16/2016] [Indexed: 01/04/2023] Open
Abstract
Cystic fibrosis (CF) pathophysiology is hallmarked by excessive inflammation and the inability to efficiently resolve lung infections, contributing to major morbidity and eventually the mortality of patients with this disease. Macrophages (MΦs) are major players in lung homeostasis through their diverse contributions to both the innate and adaptive immune networks. The setting of MΦ function and activity in CF is multifaceted, encompassing the response to the unique environmental cues in the CF lung as well as the intrinsic changes resulting from CFTR dysfunction. The complexity is further enhanced with the identification of modifier genes, which modulate the CFTR contribution to disease, resulting in epigenetic and transcriptional shifts in MΦ phenotype. This review focuses on the contribution of MΦ to lung homeostasis, providing an overview of the diverse literature and various perspectives on the role of these immune guardians in CF.
Collapse
Affiliation(s)
- Emanuela M Bruscia
- Section of Respiratory Medicine, Department of Pediatrics, Yale University School of Medicine, New Haven, Conn., USA
| | | |
Collapse
|
38
|
Liu L, Wang C, Lin Y, Xi Y, Li H, Shi S, Li H, Zhang W, Zhao Y, Tian Y, Xu C, Wang L. Suppression of calcium‑sensing receptor ameliorates cardiac hypertrophy through inhibition of autophagy. Mol Med Rep 2016; 14:111-20. [PMID: 27176663 PMCID: PMC4918534 DOI: 10.3892/mmr.2016.5279] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 03/22/2016] [Indexed: 01/16/2023] Open
Abstract
The calcium-sensing receptor (CaSR) releases intracellular calcium ([Ca2+]i) by accumulating inositol phosphate. Changes in [Ca2+]i initiate myocardial hypertrophy. Furthermore, autophagy associated with [Ca2+]i. Autophagy has previously been demonstrated to participate in the hypertrophic process. The current study investigated whether suppression of CaSR affects the hypertrophic response via modulating autophagy. Isoproterenol (ISO) was used to induce cardiac hypertrophy in Wistar rats. Hypertrophic status was determined by echocardiographic assessment, hematoxylin and eosin, and Masson's staining. The protein expression levels of CaSR and autophagy level were observed. Changes of hypertrophy and autophagy indicators were observed following intravenous injection of a CaSR inhibitor. An ISO-induced cardiomyocyte hypertrophy model was established and used determine the involvement of GdCl3. [Ca2+]i was determined using Fluo-4/AM dye followed by confocal microscopy. The expression levels of various active proteins were analyzed by western blotting. The size of the heart, expression levels of CaSR and autophagy level were markedly increased in hypertrophic myocardium. In addition, the present study demonstrated that the indicators of hypertrophy and autophagy were effectively suppressed by CaSR inhibitor. Furthermore, similar effects were demonstrated in neonatal rat hypertrophic cardiomyocytes treated with ISO. It was also observed that CaSR regulates the Ca2+/calmodulin-dependent protein kinase kinase β (CaMKKβ)-AMP-activated protein kinase (AMPK)-mammalian target of rapamycin (mTOR) signaling pathway induced by ISO in cardiomyocytes. Furthermore, the AMPK inhibition significantly reduced the autophagy level following CaSR stimulation (P<0.05). The results of the present demonstrated that inhibition of CaSR may ameliorate cardiac hypertrophy induced by ISO and the effect may be associated with the inhibition of autophagy and suppression of the CaMKKβ-AMPK-mTOR signaling pathway.
Collapse
Affiliation(s)
- Lei Liu
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Chao Wang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yan Lin
- Department of Pathophysiology, Qiqihar Medical College, Qiqihar, Heilongjiang 161042, P.R. China
| | - Yuhui Xi
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Hong Li
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Sa Shi
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Hongzhu Li
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Weihua Zhang
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yajun Zhao
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Ye Tian
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Changqing Xu
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Lina Wang
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| |
Collapse
|
39
|
Esposito S, Tosco A, Villella VR, Raia V, Kroemer G, Maiuri L. Manipulating proteostasis to repair the F508del-CFTR defect in cystic fibrosis. Mol Cell Pediatr 2016; 3:13. [PMID: 26976279 PMCID: PMC4791443 DOI: 10.1186/s40348-016-0040-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 03/07/2016] [Indexed: 12/31/2022] Open
Abstract
Cystic fibrosis (CF) is a lethal monogenic disease caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene that entails the (diagnostic) increase in sweat electrolyte concentrations, progressive lung disease with chronic inflammation and recurrent bacterial infections, pancreatic insufficiency, and male infertility. Therapies aimed at restoring the CFTR defect have emerged. Thus, a small molecule which facilitates chloride channel opening, the potentiator Ivacaftor, has been approved for the treatment of CF patients bearing a particular class of rare CFTR mutations. However, small molecules that directly target the most common misfolded CFTR mutant, F508del, and improve its intracellular trafficking in vitro, have been less effective than expected when tested in CF patients, even in combination with Ivacaftor. Thus, new strategies are required to circumvent the F508del-CFTR defect. Airway and intestinal epithelial cells from CF patients bearing the F508del-CFTR mutation exhibit an impressive derangement of cellular proteostasis, with oxidative stress, overactivation of the tissue transglutaminase (TG2), and disabled autophagy. Proteostasis regulators such as cysteamine can rescue and stabilize a functional F508del-CFTR protein through suppressing TG2 activation and restoring autophagy in vivo in F508del-CFTR homozygous mice, in vitro in CF patient-derived cell lines, ex vivo in freshly collected primary patient’s nasal cells, as well as in a pilot clinical trial involving homozygous F508del-CFTR patients. Here, we discuss how the therapeutic normalization of defective proteostasis can be harnessed for the treatment of CF patients with the F508del-CFTR mutation.
Collapse
Affiliation(s)
- Speranza Esposito
- European Institute for Research in Cystic Fibrosis, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, 20132, Italy
| | - Antonella Tosco
- Regional Cystic Fibrosis Center, Pediatric Unit, Department of Translational Medical Sciences, Federico II University, Naples, 80131, Italy
| | - Valeria R Villella
- European Institute for Research in Cystic Fibrosis, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, 20132, Italy
| | - Valeria Raia
- Regional Cystic Fibrosis Center, Pediatric Unit, Department of Translational Medical Sciences, Federico II University, Naples, 80131, Italy.
| | - Guido Kroemer
- Equipe 11 labellisée par la Ligue contre le Cancer, Centre de Recherche des Cordeliers, Paris, France. .,Cell Biology and Metabolomics Platforms, GustaveRoussy Comprehensive Cancer Center, Villejuif, France. .,INSERM, U1138, Paris, France. .,Université Paris Descartes, Sorbonne Paris Cité, Paris, France. .,Université Pierre et Marie Curie, Paris, France. .,Pôle de Biologie, HôpitalEuropéen Georges Pompidou, AP-HP, Paris, France. .,Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden.
| | - Luigi Maiuri
- European Institute for Research in Cystic Fibrosis, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, 20132, Italy. .,SCDU of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Novara, 28100, Italy.
| |
Collapse
|
40
|
Khalil H, Tazi M, Caution K, Ahmed A, Kanneganti A, Assani K, Kopp B, Marsh C, Dakhlallah D, Amer AO. Aging is associated with hypermethylation of autophagy genes in macrophages. Epigenetics 2016; 11:381-8. [PMID: 26909551 DOI: 10.1080/15592294.2016.1144007] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Autophagy is a biological process characterized by self-digestion and involves induction of autophagosome formation, leading to degradation of autophagic cargo. Aging is associated with the reduction of autophagy activity leading to neurodegenerative disorders, chronic inflammation, and susceptibility to infection; however, the underlying mechanism is unclear. DNA methylation by DNA methyltransferases reduces the expression of corresponding genes. Since macrophages are major players in inflammation and defense against infection we determined the differences in methylation of autophagy genes in macrophages derived from young and aged mice. We found that promoter regions of Atg5 and LC3B are hypermethylated in macrophages from aged mice and this is accompanied by low gene expression. Treatment of aged mice and their derived macrophages with methyltransferase inhibitor (2)-epigallocatechin-3-gallate (EGCG) or specific DNA methyltransferase 2 (DNMT2) siRNA restored the expression of Atg5 and LC3 in vivo and in vitro. Our study builds a foundation for the development of novel therapeutics aimed to improve autophagy in the elderly population and suggests a role for DNMT2 in DNA methylation activities.
Collapse
Affiliation(s)
- Hany Khalil
- a Department of Molecular Biology , Genetic Engineering and Biotechnology Research Institute, University of Sadat City , Sadat City , Egypt
| | - Mia Tazi
- b Department of Microbial Infection and Immunity , Center for Microbial Interface Biology, The Ohio State University , Columbus , OH.,c The Davis Heart and Lung Research Institute, The Ohio State University , Columbus , OH
| | - Kyle Caution
- b Department of Microbial Infection and Immunity , Center for Microbial Interface Biology, The Ohio State University , Columbus , OH.,c The Davis Heart and Lung Research Institute, The Ohio State University , Columbus , OH
| | - Amr Ahmed
- b Department of Microbial Infection and Immunity , Center for Microbial Interface Biology, The Ohio State University , Columbus , OH.,c The Davis Heart and Lung Research Institute, The Ohio State University , Columbus , OH
| | - Apurva Kanneganti
- b Department of Microbial Infection and Immunity , Center for Microbial Interface Biology, The Ohio State University , Columbus , OH.,c The Davis Heart and Lung Research Institute, The Ohio State University , Columbus , OH
| | - Kaivon Assani
- d The Research Institute at Nationwide Children's Hospital, The Ohio State University , Columbus , OH
| | - Benjamin Kopp
- d The Research Institute at Nationwide Children's Hospital, The Ohio State University , Columbus , OH
| | - Clay Marsh
- c The Davis Heart and Lung Research Institute, The Ohio State University , Columbus , OH
| | - Duaa Dakhlallah
- c The Davis Heart and Lung Research Institute, The Ohio State University , Columbus , OH
| | - Amal O Amer
- b Department of Microbial Infection and Immunity , Center for Microbial Interface Biology, The Ohio State University , Columbus , OH.,c The Davis Heart and Lung Research Institute, The Ohio State University , Columbus , OH
| |
Collapse
|
41
|
Abdelaziz DHA, Khalil H, Cormet-Boyaka E, Amer AO. The cooperation between the autophagy machinery and the inflammasome to implement an appropriate innate immune response: do they regulate each other? Immunol Rev 2016; 265:194-204. [PMID: 25879294 DOI: 10.1111/imr.12288] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Autophagy is originally described as the main catabolic pathway responsible for maintaining intracellular nutritional homeostasis that involves the formation of a unique vacuole, the autophagosome, and the interaction with the endosome-lysosome pathways. This conserved machinery plays a key role in immune-protection against different invaders, including pathogenic bacteria, intracellular parasites, and some viruses like herpes simplex and hepatitis C virus. Importantly, autophagy is linked to a number of human diseases and disorders including neurodegenerative disease, Crohn's disease, type II diabetes, tumorigenesis, cardiomyopathy, and fatty liver disease. On the other hand, inflammasomes are multiprotein platforms stimulated upon several environmental conditions and microbial infection. Once assembled, the inflammasomes mediate the maturation of pro-inflammatory cytokines and promote phagosome-lysosome fusion to sustain an innate immune response. The intersections between autophagy and inflammasome have been observed in various diseases and microbial infections. This review highlights the molecular aspects involved in autophagy and inflammasome interactions during different medical conditions and microbial infections.
Collapse
Affiliation(s)
- Dalia H A Abdelaziz
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Helwan University, Cairo, Egypt
| | | | | | | |
Collapse
|
42
|
Maiuri MC, De Stefano D. Pathophysiologic Role of Autophagy in Human Airways. AUTOPHAGY NETWORKS IN INFLAMMATION 2016. [PMCID: PMC7123327 DOI: 10.1007/978-3-319-30079-5_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Lung diseases are among the most common and widespread disorders worldwide. They refer to many different pathological conditions affecting the pulmonary system in acute or chronic forms, such as asthma, chronic obstructive pulmonary disease, infections, cystic fibrosis, lung cancer and many other breath complications. Environmental, epigenetic and genetic co-factors are responsible for these pathologies that can lead to respiratory failure, and, even, ultimately death. Increasing evidences have highlighted the implication of the autophagic pathways in the pathogenesis of lung diseases and, in some cases, the deregulated molecular mechanisms underlying autophagy may be considered as potential new therapeutic targets. This chapter summarizes recent advances in understanding the pathophysiological functions of autophagy and its possible roles in the causation and/or prevention of human lung diseases.
Collapse
|
43
|
De Stefano D, Villella VR, Esposito S, Tosco A, Sepe A, De Gregorio F, Salvadori L, Grassia R, Leone CA, De Rosa G, Maiuri MC, Pettoello-Mantovani M, Guido S, Bossi A, Zolin A, Venerando A, Pinna LA, Mehta A, Bona G, Kroemer G, Maiuri L, Raia V. Restoration of CFTR function in patients with cystic fibrosis carrying the F508del-CFTR mutation. Autophagy 2015; 10:2053-74. [PMID: 25350163 PMCID: PMC4502695 DOI: 10.4161/15548627.2014.973737] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Restoration of BECN1/Beclin 1-dependent autophagy and depletion of SQSTM1/p62 by genetic manipulation or autophagy-stimulatory proteostasis regulators, such as cystamine, have positive effects on mouse models of human cystic fibrosis (CF). These measures rescue the functional expression of the most frequent pathogenic CFTR mutant, F508del, at the respiratory epithelial surface and reduce lung inflammation in CftrF508del homozygous mice. Cysteamine, the reduced form of cystamine, is an FDA-approved drug. Here, we report that oral treatment with cysteamine greatly reduces the mortality rate and improves the phenotype of newborn mice bearing the F508del-CFTR mutation. Cysteamine was also able to increase the plasma membrane expression of the F508del-CFTR protein in nasal epithelial cells from F508del homozygous CF patients, and these effects persisted for 24 h after cysteamine withdrawal. Importantly, this cysteamine effect after washout was further sustained by the sequential administration of epigallocatechin gallate (EGCG), a green tea flavonoid, both in vivo, in mice, and in vitro, in primary epithelial cells from CF patients. In a pilot clinical trial involving 10 F508del-CFTR homozygous CF patients, the combination of cysteamine and EGCG restored BECN1, reduced SQSTM1 levels and improved CFTR function from nasal epithelial cells in vivo, correlating with a decrease of chloride concentrations in sweat, as well as with a reduction of the abundance of TNF/TNF-alpha (tumor necrosis factor) and CXCL8 (chemokine [C-X-C motif] ligand 8) transcripts in nasal brushing and TNF and CXCL8 protein levels in the sputum. Altogether, these results suggest that optimal schedules of cysteamine plus EGCG might be used for the treatment of CF caused by the F508del-CFTR mutation.
Collapse
Key Words
- BECN1/Beclin 1, autophagy-related
- CF, cystic fibrosis
- CFTR
- CFTR, cystic fibrosis transmembrane conductance regulator
- CHX, cycloheximide
- CSNK2, casein kinase 2
- CXCL2, chemokine (C-X-C motif) ligand 2
- CXCL8, chemokine (C-X-C motif) ligand 8
- EGCG, epigallocatechin gallate
- FEV, forced expiratory volume
- PM, plasma membrane
- RPD, rectal potential difference
- SQSTM1, sequestosome 1
- TGM2, transglutaminase 2
- TNF, tumor necrosis factor
- autophagy
- cysteamine
- cystic fibrosis
- epigallocatechin gallate
- sweat chloride
Collapse
Affiliation(s)
- Daniela De Stefano
- a European Institute for Research in Cystic Fibrosis; Division of Genetics and Cell Biology; San Raffaele Scientific Institute ; Milan , Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Abstract
Burkholderia cepacia complex (Bcc) species are a group of Gram-negative opportunistic pathogens that infect the airways of cystic fibrosis patients, and occasionally they infect other immunocompromised patients. Bcc bacteria display high-level multidrug resistance and chronically persist in the infected host while eliciting robust inflammatory responses. Studies using macrophages, neutrophils, and dendritic cells, combined with advances in the genetic manipulation of these bacteria, have increased our understanding of the molecular mechanisms of virulence in these pathogens and the molecular details of cell-host responses triggering inflammation. This article discusses our current view of the intracellular survival of Burkholderia cenocepacia within macrophages.
Collapse
Affiliation(s)
- Miguel A. Valvano
- Centre for Infection and Immunity, Queen’s University Belfast, Belfast, BT9 7AE, UK
- Centre for Human Immunology, Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1, Canada
| |
Collapse
|
45
|
Devenish RJ, Lai S. Autophagy and Burkholderia. Immunol Cell Biol 2014; 93:18-24. [DOI: 10.1038/icb.2014.87] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 09/11/2014] [Accepted: 09/16/2014] [Indexed: 12/26/2022]
Affiliation(s)
- Rodney J Devenish
- Department of Biochemistry and Molecular Biology, Monash University, Clayton CampusMelbourneVICAustralia
| | - Shu‐chin Lai
- Department of Biochemistry and Molecular Biology, Monash University, Clayton CampusMelbourneVICAustralia
| |
Collapse
|
46
|
Andrade A, Valvano MA. A Burkholderia cenocepacia gene encoding a non-functional tyrosine phosphatase is required for the delayed maturation of the bacteria-containing vacuoles in macrophages. Microbiology (Reading) 2014; 160:1332-1345. [DOI: 10.1099/mic.0.077206-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Burkholderia cenocepacia infects patients with cystic fibrosis. We have previously shown that B. cenocepacia can survive in macrophages within membrane vacuoles [B. cenocepacia-containing vacuoles (BcCVs)] that preclude fusion with the lysosome. The bacterial factors involved in B. cenocepacia intracellular survival are not fully elucidated. We report here that deletion of BCAM0628, encoding a predicted low molecular weight protein tyrosine phosphatase (LMW-PTP) that is restricted to B. cenocepacia strains of the transmissible ET-12 clone, accelerates the maturation of the BcCVs. Compared to the parental strain and deletion mutants in other LMW-PTPs that are widely conserved in Burkholderia species, a greater proportion of BcCVs containing the ΔBCAM0628 mutant were targeted to the lysosome. Accelerated BcCV maturation was not due to reduced intracellular viability since ΔBCAM0628 survived and replicated in macrophages similarly to the parental strain. Therefore, BCAM0628 was referred to as dpm (delayed phagosome maturation). We provide evidence that the Dpm protein is secreted during growth in vitro and upon macrophage infection. Dpm secretion requires an N-terminal signal peptide. Heterologous expression of Dpm in Burkholderia multivorans confers to this bacterium a similar phagosomal maturation delay to that found with B. cenocepacia. We demonstrate that Dpm is an inactive phosphatase, suggesting that its contribution to phagosomal maturation arrest must be unrelated to tyrosine phosphatase activity.
Collapse
Affiliation(s)
- Angel Andrade
- Centre for Human Immunology and Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1, Canada
| | - Miguel A. Valvano
- Centre for Infection and Immunity, Queen's University Belfast, Belfast BT9 5AE, UK
- Centre for Human Immunology and Department of Microbiology and Immunology, University of Western Ontario, London, ON N6A 5C1, Canada
| |
Collapse
|
47
|
Wang P, Xu TY, Wei K, Guan YF, Wang X, Xu H, Su DF, Pei G, Miao CY. ARRB1/β-arrestin-1 mediates neuroprotection through coordination of BECN1-dependent autophagy in cerebral ischemia. Autophagy 2014; 10:1535-48. [PMID: 24988431 PMCID: PMC4206533 DOI: 10.4161/auto.29203] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Autophagy, a highly conserved process conferring cytoprotection against stress, contributes to the progression of cerebral ischemia. β-arrestins are multifunctional proteins that mediate receptor desensitization and serve as important signaling scaffolds involved in numerous physiopathological processes. Here, we show that both ARRB1 (arrestin, β 1) and ARRB2 (arrestin, β 2) were upregulated by cerebral ischemic stress. Knockout of Arrb1, but not Arrb2, aggravated the mortality, brain infarction, and neurological deficit in a mouse model of cerebral ischemia. Accordingly, Arrb1-deficient neurons exhibited enhanced cell injury upon oxygen-glucose deprivation (OGD), an in vitro model of ischemia. Deletion of Arrb1 did not affect the cerebral ischemia-induced inflammation, oxidative stress, and nicotinamide phosphoribosyltransferase upregulation, but markedly suppressed autophagy and induced neuronal apoptosis/necrosis in vivo and in vitro. Additionally, we found that ARRB1 interacted with BECN1/Beclin 1 and PIK3C3/Vps34, 2 major components of the BECN1 autophagic core complex, under the OGD condition but not normal conditions in neurons. Finally, deletion of Arrb1 impaired the interaction between BECN1 and PIK3C3, which is a critical event for autophagosome formation upon ischemic stress, and markedly reduced the kinase activity of PIK3C3. These findings reveal a neuroprotective role for ARRB1, in the context of cerebral ischemia, centered on the regulation of BECN1-dependent autophagosome formation.
Collapse
Affiliation(s)
- Pei Wang
- Department of Pharmacology; Second Military Medical University; Shanghai, China
| | - Tian-Ying Xu
- Department of Pharmacology; Second Military Medical University; Shanghai, China
| | - Kai Wei
- Department of Pharmacology; Second Military Medical University; Shanghai, China
| | - Yun-Feng Guan
- Department of Pharmacology; Second Military Medical University; Shanghai, China
| | - Xia Wang
- Department of Pharmacology; Second Military Medical University; Shanghai, China
| | - Hui Xu
- Institute of Biochemistry and Cell Biology; Shanghai Institutes for Biological Sciences; Chinese Academy of Sciences; Shanghai, China
| | - Ding-Feng Su
- Department of Pharmacology; Second Military Medical University; Shanghai, China
| | - Gang Pei
- Institute of Biochemistry and Cell Biology; Shanghai Institutes for Biological Sciences; Chinese Academy of Sciences; Shanghai, China; School of Life Science and Technology; Tongji University; Shanghai, China
| | - Chao-Yu Miao
- Department of Pharmacology; Second Military Medical University; Shanghai, China; Center of Stroke; Beijing Institute for Brain Disorders; Beijing, China
| |
Collapse
|
48
|
Assani K, Tazi MF, Amer AO, Kopp BT. IFN-γ stimulates autophagy-mediated clearance of Burkholderia cenocepacia in human cystic fibrosis macrophages. PLoS One 2014; 9:e96681. [PMID: 24798083 PMCID: PMC4010498 DOI: 10.1371/journal.pone.0096681] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 04/10/2014] [Indexed: 01/22/2023] Open
Abstract
Burkholderia cenocepacia is a virulent pathogen that causes significant morbidity and mortality in patients with cystic fibrosis (CF), survives intracellularly in macrophages, and uniquely causes systemic infections in CF. Autophagy is a physiologic process that involves engulfing non-functional organelles and proteins and delivering them for lysosomal degradation, but also plays a role in eliminating intracellular pathogens, including B. cenocepacia. Autophagy is defective in CF but can be stimulated in murine CF models leading to increased clearance of B. cenocepacia, but little is known about autophagy stimulation in human CF macrophages. IFN-γ activates macrophages and increases antigen presentation while also inducing autophagy in macrophages. We therefore, hypothesized that treatment with IFN-γ would increase autophagy and macrophage activation in patients with CF. Peripheral blood monocyte derived macrophages (MDMs) were obtained from CF and non-CF donors and subsequently infected with B. cenocepacia. Basal serum levels of IFN-γ were similar between CF and non-CF patients, however after B. cenocepacia infection there is deficient IFN-γ production in CF MDMs. IFN-γ treated CF MDMs demonstrate increased co-localization with the autophagy molecule p62, increased autophagosome formation, and increased trafficking to lysosomes compared to untreated CF MDMs. Electron microscopy confirmed IFN-γ promotes double membrane vacuole formation around bacteria in CF MDMs, while only single membrane vacuoles form in untreated CF cells. Bacterial burden is significantly reduced in autophagy stimulated CF MDMs, comparable to non-CF levels. IL-1β production is decreased in CF MDMs after IFN-γ treatment. Together, these results demonstrate that IFN-γ promotes autophagy-mediated clearance of B. cenocepacia in human CF macrophages.
Collapse
Affiliation(s)
- Kaivon Assani
- Center for Microbial Pathogenesis, The Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
| | - Mia F. Tazi
- Department of Microbial Infection and Immunity and the Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Amal O. Amer
- Department of Microbial Infection and Immunity and the Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Benjamin T. Kopp
- Center for Microbial Pathogenesis, The Research Institute at Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Section of Pediatric Pulmonology, Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- * E-mail:
| |
Collapse
|
49
|
Junkins RD, McCormick C, Lin TJ. The emerging potential of autophagy-based therapies in the treatment of cystic fibrosis lung infections. Autophagy 2014; 10:538-47. [PMID: 24434788 PMCID: PMC4077897 DOI: 10.4161/auto.27750] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Cystic fibrosis (CF) is caused by mutations in the CF transmembrane conductance regulator (CFTR), a channel that normally transports anions across epithelial cell membranes. The most common manifestation of CF is buildup of mucus in the airways and bacterial colonization of the lower respiratory tract, accompanied by chronic inflammation. Antibiotics are used to control CF-associated opportunistic infections, but lengthy antibiotic treatment risks the emergence of multiple-drug resistant (MDR) strains. New antimicrobial strategies are needed to prevent and treat infections in these high-risk individuals. Autophagy contributes to the control of a variety of microbial infections. For this reason, the recent discovery of functional impairment of autophagy in CF provides a new basis for understanding susceptibility to severe infections. Here, we review the role of autophagy in host defense against CF-associated bacterial and fungal pathogens, and survey pharmacologic approaches to restore normal autophagy function in these individuals. Autophagy restoration therapy may improve pathogen clearance and mitigate lung inflammation in CF airways.
Collapse
Affiliation(s)
- Robert D Junkins
- Department of Microbiology and Immunology; Dalhousie University; Halifax, NS CA; Department of Pediatrics; IWK Health Centre; Halifax, NS CA; Beatrice Hunter Cancer Research Institute; Halifax, NS CA
| | - Craig McCormick
- Department of Microbiology and Immunology; Dalhousie University; Halifax, NS CA; Beatrice Hunter Cancer Research Institute; Halifax, NS CA
| | - Tong-Jun Lin
- Department of Microbiology and Immunology; Dalhousie University; Halifax, NS CA; Department of Pediatrics; IWK Health Centre; Halifax, NS CA; Beatrice Hunter Cancer Research Institute; Halifax, NS CA
| |
Collapse
|
50
|
Al-Khodor S, Marshall-Batty K, Nair V, Ding L, Greenberg DE, Fraser IDC. Burkholderia cenocepacia J2315 escapes to the cytosol and actively subverts autophagy in human macrophages. Cell Microbiol 2013; 16:378-95. [PMID: 24119232 DOI: 10.1111/cmi.12223] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 09/27/2013] [Accepted: 10/04/2013] [Indexed: 12/15/2022]
Abstract
Selective autophagy functions to specifically degrade cellular cargo tagged by ubiquitination, including bacteria. Strains of the Burkholderia cepacia complex (Bcc) are opportunistic pathogens that cause life-threatening infections in patients with cystic fibrosis (CF) and chronic granulomatous disease (CGD). While there is evidence that defective macrophage autophagy in a mouse model of CF can influence B. cenocepacia susceptibility, there have been no comprehensive studies on how this bacterium is sensed and targeted by the host autophagy response in human macrophages. Here, we describe the intracellular life cycle of B. cenocepacia J2315 and its interaction with the autophagy pathway in human cells. Electron and confocal microscopy analyses demonstrate that the invading bacteria interact transiently with the endocytic pathway before escaping to the cytosol. This escape triggers theselective autophagy pathway, and the recruitment of ubiquitin, the ubiquitin-binding adaptors p62 and NDP52 and the autophagosome membrane-associated protein LC3B, to the bacterial vicinity. However, despite recruitment of these key autophagy pathway effectors, B. cenocepacia blocks autophagosome completion and replicates in the host cytosol. We find that a pre-infection increase in cellular autophagy flux can significantly inhibit B. cenocepacia replication and that lower autophagy flux in macrophages from immunocompromised CGD patients could contribute to increased B. cenocepacia susceptibility, identifying autophagy manipulation as a potential therapeutic approach to reduce bacterial burden in B. cenocepacia infections.
Collapse
Affiliation(s)
- Souhaila Al-Khodor
- Signaling Systems Unit, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | | | | | | | | | | |
Collapse
|