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Li Y, Prakash YS, Tan Q, Tschumperlin D. Defining signals that promote human alveolar type I differentiation. Am J Physiol Lung Cell Mol Physiol 2024; 326:L409-L418. [PMID: 38349124 PMCID: PMC11281788 DOI: 10.1152/ajplung.00191.2023] [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: 06/20/2023] [Revised: 10/23/2023] [Accepted: 01/18/2024] [Indexed: 02/29/2024] Open
Abstract
Alveolar type I (ATI) cells cover >95% of the lung's distal surface and facilitate gas exchange through their exceptionally thin shape. ATI cells in vivo are replenished by alveolar type II cell division and differentiation, but a detailed understanding of ATI biology has been hampered by the challenges in direct isolation of these cells due to their fragility and incomplete understanding of the signaling interactions that promote differentiation of ATII to ATI cells. Here, we explored the signals that maintain ATII versus promote ATI fates in three-dimensional (3-D) organoid cultures and developed a human alveolar type I differentiation medium (hATIDM) suitable for generating ATI cells from either mixed distal human lung cells or purified ATII cells. This media adds bone morphogenetic protein 4 (BMP4) and removes epidermal growth factor (EGF), Wnt agonist CHIR99021, and transforming growth factor-beta (TGF-β) inhibitor SB431542 from previously developed alveolar organoid culture media. We demonstrate that BMP4 promotes expression of the ATI marker gene AGER and HOPX, whereas CHIR99021 and SB431542 maintain expression of the ATII marker gene SFTPC. The human ATI spheroids generated with hATIDM express multiple molecular and morphological features reminiscent of human ATI cells. Our results demonstrate that signaling interactions among BMP, TGF-β, and Wnt signaling pathways in alveolar spheroids and distal lung organoids including IPF-organoids coordinate human ATII to ATI differentiation.NEW & NOTEWORTHY Alveolar type I (ATI) epithelial cells perform essential roles in maintaining lung function but have been challenging to study. We explored the signals that promote ATI fate in 3-D organoid cultures generated from either mixed distal human lung cells or purified alveolar type II (ATII) cells. This work fills an important void in our experimental repertoire for studying alveolar epithelial cells and identifies signals that promote human ATII to ATI cell differentiation.
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Affiliation(s)
- Yong Li
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States
| | - Y S Prakash
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota, United States
| | - Qi Tan
- The Hormel Institute, University of Minnesota, Austin, Minnesota, United States
| | - Daniel Tschumperlin
- Department of Physiology & Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States
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2
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Luo L, Zhang W, You S, Cui X, Tu H, Yi Q, Wu J, Liu O. The role of epithelial cells in fibrosis: Mechanisms and treatment. Pharmacol Res 2024; 202:107144. [PMID: 38484858 DOI: 10.1016/j.phrs.2024.107144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/19/2024] [Accepted: 03/12/2024] [Indexed: 03/19/2024]
Abstract
Fibrosis is a pathological process that affects multiple organs and is considered one of the major causes of morbidity and mortality in multiple diseases, resulting in an enormous disease burden. Current studies have focused on fibroblasts and myofibroblasts, which directly lead to imbalance in generation and degradation of extracellular matrix (ECM). In recent years, an increasing number of studies have focused on the role of epithelial cells in fibrosis. In some cases, epithelial cells are first exposed to external physicochemical stimuli that may directly drive collagen accumulation in the mesenchyme. In other cases, the source of stimulation is mainly immune cells and some cytokines, and epithelial cells are similarly altered in the process. In this review, we will focus on the multiple dynamic alterations involved in epithelial cells after injury and during fibrogenesis, discuss the association among them, and summarize some therapies targeting changed epithelial cells. Especially, epithelial mesenchymal transition (EMT) is the key central step, which is closely linked to other biological behaviors. Meanwhile, we think studies on disruption of epithelial barrier, epithelial cell death and altered basal stem cell populations and stemness in fibrosis are not appreciated. We believe that therapies targeted epithelial cells can prevent the progress of fibrosis, but not reverse it. The epithelial cell targeting therapies will provide a wonderful preventive and delaying action.
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Affiliation(s)
- Liuyi Luo
- Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, China; Academician Workstation for Oral-maxilofacial and Regenerative Medicine, Central South University, Changsha, Hunan, China
| | - Wei Zhang
- Department of Oral Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Siyao You
- Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, China; Academician Workstation for Oral-maxilofacial and Regenerative Medicine, Central South University, Changsha, Hunan, China
| | - Xinyan Cui
- Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, China; Academician Workstation for Oral-maxilofacial and Regenerative Medicine, Central South University, Changsha, Hunan, China
| | - Hua Tu
- Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, China; Academician Workstation for Oral-maxilofacial and Regenerative Medicine, Central South University, Changsha, Hunan, China
| | - Qiao Yi
- Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, China; Academician Workstation for Oral-maxilofacial and Regenerative Medicine, Central South University, Changsha, Hunan, China
| | - Jianjun Wu
- Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, China; Academician Workstation for Oral-maxilofacial and Regenerative Medicine, Central South University, Changsha, Hunan, China.
| | - Ousheng Liu
- Xiangya Stomatological Hospital & Xiangya School of Stomatology, Central South University, Changsha, Hunan, China; Academician Workstation for Oral-maxilofacial and Regenerative Medicine, Central South University, Changsha, Hunan, China.
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3
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Narasimhan H, Cheon IS, Qian W, Hu S, Parimon T, Li C, Goplen N, Wu Y, Wei X, Son YM, Fink E, Santos G, Tang J, Yao C, Muehling L, Canderan G, Kadl A, Cannon A, Young S, Hannan R, Bingham G, Arish M, Chaudhari AS, Sturek J, Pramoonjago P, Shim YM, Woodfolk J, Zang C, Chen P, Sun J. Proximal immune-epithelial progenitor interactions drive chronic tissue sequelae post COVID-19. RESEARCH SQUARE 2023:rs.3.rs-3587418. [PMID: 38077031 PMCID: PMC10705705 DOI: 10.21203/rs.3.rs-3587418/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
The long-term physiological consequences of SARS-CoV-2, termed Post-Acute Sequelae of COVID-19 (PASC), are rapidly evolving into a major public health concern. The underlying cellular and molecular etiology remain poorly defined but growing evidence links PASC to abnormal immune responses and/or poor organ recovery post-infection. Yet, the precise mechanisms driving non-resolving inflammation and impaired tissue repair in the context of PASC remain unclear. With insights from three independent clinical cohorts of PASC patients with abnormal lung function and/or viral infection-mediated pulmonary fibrosis, we established a clinically relevant mouse model of post-viral lung sequelae to investigate the pathophysiology of respiratory PASC. By employing a combination of spatial transcriptomics and imaging, we identified dysregulated proximal interactions between immune cells and epithelial progenitors unique to the fibroproliferation in respiratory PASC but not acute COVID-19 or idiopathic pulmonary fibrosis (IPF). Specifically, we found a central role for lung-resident CD8+ T cell-macrophage interactions in maintaining Krt8hi transitional and ectopic Krt5+ basal cell progenitors, thus impairing alveolar regeneration and driving fibrotic sequelae after acute viral pneumonia. Mechanistically, CD8+ T cell derived IFN-γ and TNF stimulated lung macrophages to chronically release IL-1β, resulting in the abnormal accumulation of dysplastic epithelial progenitors and fibrosis. Notably, therapeutic neutralization of IFN-γ and TNF, or IL-1β after the resolution of acute infection resulted in markedly improved alveolar regeneration and restoration of pulmonary function. Together, our findings implicate a dysregulated immune-epithelial progenitor niche in driving respiratory PASC. Moreover, in contrast to other approaches requiring early intervention, we highlight therapeutic strategies to rescue fibrotic disease in the aftermath of respiratory viral infections, addressing the current unmet need in the clinical management of PASC and post-viral disease.
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Affiliation(s)
- Harish Narasimhan
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
| | - In Su Cheon
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Wei Qian
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Sheng’en Hu
- Center for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Tanyalak Parimon
- Women’s Guild Lung Institute, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles CA 90048, USA
| | - Chaofan Li
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Nick Goplen
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN 55905, USA
| | - Yue Wu
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Xiaoqin Wei
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Young Min Son
- Department of Systems Biotechnology, Chung-Ang University, Anseong, Korea
| | - Elizabeth Fink
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Gislane Santos
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Jinyi Tang
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Changfu Yao
- Women’s Guild Lung Institute, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles CA 90048, USA
| | - Lyndsey Muehling
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Glenda Canderan
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Alexandra Kadl
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Abigail Cannon
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Samuel Young
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
| | - Riley Hannan
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Grace Bingham
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, USA
| | - Mohammed Arish
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Arka Sen Chaudhari
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Jeffrey Sturek
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | | | - Yun Michael Shim
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Judith Woodfolk
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Chongzhi Zang
- Center for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Peter Chen
- Women’s Guild Lung Institute, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles CA 90048, USA
| | - Jie Sun
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
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4
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Narasimhan H, Cheon IS, Qian W, Hu S, Parimon T, Li C, Goplen N, Wu Y, Wei X, Son YM, Fink E, Santos G, Tang J, Yao C, Muehling L, Canderan G, Kadl A, Cannon A, Young S, Hannan R, Bingham G, Arish M, Chaudhari AS, Sturek J, Pramoonjago P, Shim YM, Woodfolk J, Zang C, Chen P, Sun J. Proximal immune-epithelial progenitor interactions drive chronic tissue sequelae post COVID-19. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.13.557622. [PMID: 37745354 PMCID: PMC10515929 DOI: 10.1101/2023.09.13.557622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
The long-term physiological consequences of SARS-CoV-2, termed Post-Acute Sequelae of COVID-19 (PASC), are rapidly evolving into a major public health concern. The underlying cellular and molecular etiology remain poorly defined but growing evidence links PASC to abnormal immune responses and/or poor organ recovery post-infection. Yet, the precise mechanisms driving non-resolving inflammation and impaired tissue repair in the context of PASC remain unclear. With insights from three independent clinical cohorts of PASC patients with abnormal lung function and/or viral infection-mediated pulmonary fibrosis, we established a clinically relevant mouse model of post-viral lung sequelae to investigate the pathophysiology of respiratory PASC. By employing a combination of spatial transcriptomics and imaging, we identified dysregulated proximal interactions between immune cells and epithelial progenitors unique to the fibroproliferation in respiratory PASC but not acute COVID-19 or idiopathic pulmonary fibrosis (IPF). Specifically, we found a central role for lung-resident CD8+ T cell-macrophage interactions in maintaining Krt8hi transitional and ectopic Krt5+ basal cell progenitors, thus impairing alveolar regeneration and driving fibrotic sequelae after acute viral pneumonia. Mechanistically, CD8+ T cell derived IFN-γ and TNF stimulated lung macrophages to chronically release IL-1β, resulting in the abnormal accumulation of dysplastic epithelial progenitors and fibrosis. Notably, therapeutic neutralization of IFN-γ and TNF, or IL-1β after the resolution of acute infection resulted in markedly improved alveolar regeneration and restoration of pulmonary function. Together, our findings implicate a dysregulated immune-epithelial progenitor niche in driving respiratory PASC. Moreover, in contrast to other approaches requiring early intervention, we highlight therapeutic strategies to rescue fibrotic disease in the aftermath of respiratory viral infections, addressing the current unmet need in the clinical management of PASC and post-viral disease.
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Affiliation(s)
- Harish Narasimhan
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
| | - In Su Cheon
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Wei Qian
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Sheng’en Hu
- Center for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Tanyalak Parimon
- Women’s Guild Lung Institute, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles CA 90048, USA
| | - Chaofan Li
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Nick Goplen
- Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN 55905, USA
| | - Yue Wu
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Xiaoqin Wei
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Young Min Son
- Department of Systems Biotechnology, Chung-Ang University, Anseong, Korea
| | - Elizabeth Fink
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Gislane Santos
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Jinyi Tang
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Changfu Yao
- Women’s Guild Lung Institute, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles CA 90048, USA
| | - Lyndsey Muehling
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Glenda Canderan
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Alexandra Kadl
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Abigail Cannon
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Samuel Young
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
| | - Riley Hannan
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Grace Bingham
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, USA
| | - Mohammed Arish
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Arka Sen Chaudhari
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Jeffrey Sturek
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | | | - Yun Michael Shim
- Division of Pulmonary and Critical Care Medicine, Department of medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Judith Woodfolk
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Chongzhi Zang
- Center for Public Health Genomics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Peter Chen
- Women’s Guild Lung Institute, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles CA 90048, USA
| | - Jie Sun
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
- Division of Infectious Disease and International Health, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
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5
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Belgacemi R, Ribeiro Baptista B, Justeau G, Toigo M, Frauenpreis A, Yilmaz R, Der Vartanian A, Cazaunau M, Pangui E, Bergé A, Gratien A, Macias Rodriguez JC, Bellusci S, Derumeaux G, Boczkowski J, Al Alam D, Coll P, Lanone S, Boyer L. Complex urban atmosphere alters alveolar stem cells niche properties and drives lung fibrosis. Am J Physiol Lung Cell Mol Physiol 2023; 325:L447-L459. [PMID: 37529852 PMCID: PMC10639009 DOI: 10.1152/ajplung.00061.2023] [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: 02/21/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 08/03/2023] Open
Abstract
There is growing evidence suggesting that urban pollution has adverse effects on lung health. However, how urban pollution affects alveolar mesenchymal and epithelial stem cell niches remains unknown. This study aimed to determine how complex representative urban atmospheres alter alveolar stem cell niche properties. Mice were placed in an innovative chamber realistically simulating the atmosphere of a megalopolis, or "clean air," for 7 days. Lungs were collected, and fibroblasts and epithelial cells (EpCAM+) were isolated. Proliferative capacities of fibroblasts were tested by population doubling levels (PDL), and microarray analyses were performed. Fibroblasts and EpCAM+ cells from exposed, nonexposed, or naive mice were cocultured in organoid assays to assess the stem cell properties. Collagen deposition (Sirius red), lipofibroblasts (ADRP, COL1A1), myofibroblasts (αSMA), alveolar type 2 cells (AT2, SFTPC+), and alveolar differentiation intermediate cell [ADI, keratin-8-positive (KRT8+)/claudin-4-positive (CLDN4+)] markers were quantified in the lungs. Fibroblasts obtained from mice exposed to urban atmosphere had lower PDL and survival and produced fewer and smaller organoids. Microarray analysis showed a decrease of adipogenesis and an increase of genes associated with fibrosis, suggesting a lipofibroblast to myofibroblast transition. Collagen deposition and myofibroblast number increased in the lungs of urban atmosphere-exposed mice. AT2 number was reduced and associated with an increase in ADI cells KRT8+/CLDN4+. Furthermore, EpCAM+ cells from exposed mice also produced fewer and smaller organoids. In conclusion, urban atmosphere alters alveolar mesenchymal stem cell niche properties by inducing a lipofibroblast to myofibroblast shift. It also results in alveolar epithelial dysfunction and a fibrotic-like phenotype.NEW & NOTEWORTHY Urban pollution is known to have major adverse effects on lung health. To assess the effect of pollution on alveolar regeneration, we exposed adult mice to a simulated high-pollution urban atmosphere, using an innovative CESAM simulation chamber (Multiphase Atmospheric Experimental Simulation Chamber, https://cesam.cnrs.fr/). We demonstrated that urban atmosphere alters alveolar mesenchymal stem cell niche properties by inducing a lipofibroblast to myofibroblast shift and induces alveolar epithelial dysfunction.
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Affiliation(s)
- Randa Belgacemi
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
- Lundquist Institute for Biomedical Innovation, Harbor-UCLA Medical Center, Torrance, California, United States
| | | | - Grégoire Justeau
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
| | - Marylène Toigo
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
| | - Andrew Frauenpreis
- Lundquist Institute for Biomedical Innovation, Harbor-UCLA Medical Center, Torrance, California, United States
| | - Rojda Yilmaz
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
| | | | - Mathieu Cazaunau
- Université Paris Est Créteil and Université Paris Cité, CNRS, LISA, Créteil, France
| | - Edouard Pangui
- Université Paris Est Créteil and Université Paris Cité, CNRS, LISA, Créteil, France
| | - Antonin Bergé
- Université Paris Cité and Université Paris Est Créteil, CNRS, LISA, Paris, France
| | - Aline Gratien
- Université Paris Cité and Université Paris Est Créteil, CNRS, LISA, Paris, France
| | | | - Saverio Bellusci
- German Center for Lung Research (DZL), Department of Pulmonary and Critical Care Medicine and Infectious Diseases, Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Justus Liebig University Giessen, Giessen, Germany
| | - Geneviève Derumeaux
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
- Service de Physiologie-Explorations Fonctionnelles, Hôpital Henri Mondor, Créteil, France
| | - Jorge Boczkowski
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
| | - Denise Al Alam
- Lundquist Institute for Biomedical Innovation, Harbor-UCLA Medical Center, Torrance, California, United States
| | - Patrice Coll
- Université Paris Cité and Université Paris Est Créteil, CNRS, LISA, Paris, France
| | - Sophie Lanone
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
| | - Laurent Boyer
- Université Paris Est Créteil, INSERM, IMRB, FHU Senec, Créteil, France
- Service de Physiologie-Explorations Fonctionnelles, Hôpital Henri Mondor, Créteil, France
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Vats A, Chaturvedi P. The Regenerative Power of Stem Cells: Treating Bleomycin-Induced Lung Fibrosis. Stem Cells Cloning 2023; 16:43-59. [PMID: 37719787 PMCID: PMC10505024 DOI: 10.2147/sccaa.s419474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 09/06/2023] [Indexed: 09/19/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic and progressive lung disease with no known cure, characterized by the formation of scar tissue in the lungs, leading to respiratory failure. Although the exact cause of IPF remains unclear, the condition is thought to result from a combination of genetic and environmental factors. One of the most widely used animal models to study IPF is the bleomycin-induced lung injury model in mice. In this model, the administration of the chemotherapeutic agent bleomycin causes pulmonary inflammation and fibrosis, which closely mimics the pathological features of human IPF. Numerous recent investigations have explored the functions of various categories of stem cells in the healing process of lung injury induced by bleomycin in mice, documenting the beneficial effects and challenges of this approach. Differentiation of stem cells into various cell types and their ability to modulate tissue microenvironment is an emerging aspect of the regenerative therapies. This review article aims to provide a comprehensive overview of the role of stem cells in repairing bleomycin-induced lung injury. It delves into the mechanisms through which various types of stem cells, including mesenchymal stem cells, embryonic stem cells, induced pluripotent stem cells, and lung resident stem cells, exert their therapeutic effects in this specific model. We have also discussed the unique set of intermediate markers and signaling factors that can influence the proliferation and differentiation of alveolar epithelial cells both during lung repair and homeostasis. Finally, we highlight the challenges and opportunities associated with translating stem cell therapy to the clinic for IPF patients. The novelty and implications of this review extend beyond the understanding of the potential of stem cells in treating IPF to the broader field of regenerative medicine. We believe that the review paves the way for further advancements in stem cell therapies, offering hope for patients suffering from this debilitating and currently incurable disease.
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Affiliation(s)
- Amrita Vats
- Department of Pharmacology and Regenerative Medicine, University of Illinois, Chicago, IL, 60612, USA
| | - Pankaj Chaturvedi
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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Cohen ML, Brumwell AN, Che Ho T, Montas G, Golden JA, Jones KD, Wolters PJ, Wei Y, Chapman HA, Le Saux CJ. A fibroblast-dependent TGFβ1/sFRP2 noncanonical Wnt signaling axis underlies epithelial metaplasia in idiopathic pulmonary fibrosis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.02.551383. [PMID: 37577522 PMCID: PMC10418166 DOI: 10.1101/2023.08.02.551383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Reciprocal interactions between alveolar fibroblasts and epithelial cells are crucial for lung homeostasis, injury repair, and fibrogenesis, but underlying mechanisms remain unclear. To investigate this, we administered the fibroblast-selective TGFβ1 signaling inhibitor, epigallocatechin gallate (EGCG), to Interstitial Lung Disease (ILD) patients undergoing diagnostic lung biopsy and conducted single-cell RNA sequencing on spare tissue. Unexposed biopsy samples showed higher fibroblast TGFβ1 signaling compared to non-disease donor or end-stage ILD tissues. In vivo, EGCG significantly downregulated TGFβ1 signaling and several pro-inflammatory and stress pathways in biopsy samples. Notably, EGCG reduced fibroblast secreted Frizzle-like Receptor Protein 2 (sFRP2), an unrecognized TGFβ1 fibroblast target gene induced near type II alveolar epithelial cells (AEC2s). In human AEC2-fibroblast coculture organoids, sFRP2 was essential for AEC2 trans-differentiation to basal cells. Precision cut lung slices (PCLS) from normal donors demonstrated that TGFβ1 promoted KRT17 expression and AEC2 morphological change, while sFRP2 was necessary for KRT5 expression in AEC2-derived basaloid cells. Wnt-receptor Frizzled 5 (Fzd5) expression and downstream calcineurin-related signaling in AEC2s were required for sFRP2-induced KRT5 expression. These findings highlight stage-specific TGFβ1 signaling in ILD, the therapeutic potential of EGCG in reducing IPF-related transcriptional changes, and identify the TGFβ1-non-canonical Wnt pathway crosstalk via sFRP2 as a novel mechanism for dysfunctional epithelial signaling in Idiopathic Pulmonary Fibrosis/ILD.
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Affiliation(s)
- Max L. Cohen
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Alexis N. Brumwell
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Tsung Che Ho
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Genevieve Montas
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Jeffrey A. Golden
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Kirk D. Jones
- Department of Pathology; University of California San Francisco, San Francisco, California
| | - Paul J. Wolters
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Ying Wei
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Harold A. Chapman
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
| | - Claude J. Le Saux
- Department of Medicine, Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine; University of California San Francisco, San Francisco, California
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8
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Parimon T, Chen P, Stripp BR, Liang J, Jiang D, Noble PW, Parks WC, Yao C. Senescence of alveolar epithelial progenitor cells: a critical driver of lung fibrosis. Am J Physiol Cell Physiol 2023; 325:C483-C495. [PMID: 37458437 PMCID: PMC10511168 DOI: 10.1152/ajpcell.00239.2023] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/05/2023] [Accepted: 07/05/2023] [Indexed: 08/04/2023]
Abstract
Pulmonary fibrosis comprises a range of chronic interstitial lung diseases (ILDs) that impose a significant burden on patients and public health. Among these, idiopathic pulmonary fibrosis (IPF), a disease of aging, is the most common and most severe form of ILD and is treated largely by lung transplantation. The lack of effective treatments to stop or reverse lung fibrosis-in fact, fibrosis in most organs-has sparked the need to understand causative mechanisms with the goal of identifying critical points for potential therapeutic intervention. Findings from many groups have indicated that repeated injury to the alveolar epithelium-where gas exchange occurs-leads to stem cell exhaustion and impaired alveolar repair that, in turn, triggers the onset and progression of fibrosis. Cellular senescence of alveolar epithelial progenitors is a critical cause of stemness failure. Hence, senescence impairs repair and thus contributes significantly to fibrosis. In this review, we discuss recent evidence indicating that senescence of epithelial progenitor cells impairs alveolar homeostasis and repair creating a profibrotic environment. Moreover, we discuss the impact of senescent alveolar epithelial progenitors, alveolar type 2 (AT2) cells, and AT2-derived transitional epithelial cells in fibrosis. Emerging evidence indicates that transitional epithelial cells are prone to senescence and, hence, are a new player involved in senescence-associated lung fibrosis. Understanding the complex interplay of cell types and cellular regulatory factors contributing to alveolar epithelial progenitor senescence will be crucial to developing targeted therapies to mitigate their downstream profibrotic sequelae and to promote normal alveolar repair.NEW & NOTEWORTHY With an aging population, lung fibrotic diseases are becoming a global health burden. Dysfunctional repair of the alveolar epithelium is a key causative process that initiates lung fibrosis. Normal alveolar regeneration relies on functional progenitor cells; however, the senescence of these cells, which increases with age, hinders their ability to contribute to repair. Here, we discuss studies on the control and consequence of progenitor cell senescence in fibrosis and opportunities for research.
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Affiliation(s)
- Tanyalak Parimon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Peter Chen
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Barry R Stripp
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Jiurong Liang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Dianhua Jiang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Paul W Noble
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - William C Parks
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Changfu Yao
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States
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Heydemann L, Ciurkiewicz M, Beythien G, Becker K, Schughart K, Stanelle-Bertram S, Schaumburg B, Mounogou-Kouassi N, Beck S, Zickler M, Kühnel M, Gabriel G, Beineke A, Baumgärtner W, Armando F. Hamster model for post-COVID-19 alveolar regeneration offers an opportunity to understand post-acute sequelae of SARS-CoV-2. Nat Commun 2023; 14:3267. [PMID: 37277327 PMCID: PMC10241385 DOI: 10.1038/s41467-023-39049-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 05/26/2023] [Indexed: 06/07/2023] Open
Abstract
COVID-19 survivors often suffer from post-acute sequelae of SARS-CoV-2 infection (PASC). Current evidence suggests dysregulated alveolar regeneration as a possible explanation for respiratory PASC, which deserves further investigation in a suitable animal model. This study investigates morphological, phenotypical and transcriptomic features of alveolar regeneration in SARS-CoV-2 infected Syrian golden hamsters. We demonstrate that CK8+ alveolar differentiation intermediate (ADI) cells occur following SARS-CoV-2-induced diffuse alveolar damage. A subset of ADI cells shows nuclear accumulation of TP53 at 6- and 14-days post infection (dpi), indicating a prolonged arrest in the ADI state. Transcriptome data show high module scores for pathways involved in cell senescence, epithelial-mesenchymal transition, and angiogenesis in cell clusters with high ADI gene expression. Moreover, we show that multipotent CK14+ airway basal cell progenitors migrate out of terminal bronchioles, aiding alveolar regeneration. At 14 dpi, ADI cells, peribronchiolar proliferates, M2-macrophages, and sub-pleural fibrosis are observed, indicating incomplete alveolar restoration. The results demonstrate that the hamster model reliably phenocopies indicators of a dysregulated alveolar regeneration of COVID-19 patients. The results provide important information on a translational COVID-19 model, which is crucial for its application in future research addressing pathomechanisms of PASC and in testing of prophylactic and therapeutic approaches for this syndrome.
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Affiliation(s)
- Laura Heydemann
- Department of Pathology, University of Veterinary Medicine, Foundation, Hannover, Germany
| | - Małgorzata Ciurkiewicz
- Department of Pathology, University of Veterinary Medicine, Foundation, Hannover, Germany
| | - Georg Beythien
- Department of Pathology, University of Veterinary Medicine, Foundation, Hannover, Germany
| | - Kathrin Becker
- Department of Pathology, University of Veterinary Medicine, Foundation, Hannover, Germany
| | - Klaus Schughart
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, USA
- Institute of Virology Münster, University of Münster, Münster, Germany
| | | | - Berfin Schaumburg
- Department for Viral Zoonoses-One Health, Leibniz Institute for Virology, Hamburg, Germany
| | - Nancy Mounogou-Kouassi
- Department for Viral Zoonoses-One Health, Leibniz Institute for Virology, Hamburg, Germany
| | - Sebastian Beck
- Department for Viral Zoonoses-One Health, Leibniz Institute for Virology, Hamburg, Germany
| | - Martin Zickler
- Department for Viral Zoonoses-One Health, Leibniz Institute for Virology, Hamburg, Germany
| | - Mark Kühnel
- Institute of Pathology, Hannover Medical School (MHH), Hannover, Germany
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Hannover Medical School (MHH), Hannover, Germany
| | - Gülsah Gabriel
- Department for Viral Zoonoses-One Health, Leibniz Institute for Virology, Hamburg, Germany
| | - Andreas Beineke
- Department of Pathology, University of Veterinary Medicine, Foundation, Hannover, Germany
| | - Wolfgang Baumgärtner
- Department of Pathology, University of Veterinary Medicine, Foundation, Hannover, Germany.
| | - Federico Armando
- Department of Pathology, University of Veterinary Medicine, Foundation, Hannover, Germany
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Promises and Challenges of Cell-Based Therapies to Promote Lung Regeneration in Idiopathic Pulmonary Fibrosis. Cells 2022; 11:cells11162595. [PMID: 36010671 PMCID: PMC9406501 DOI: 10.3390/cells11162595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/15/2022] [Accepted: 08/18/2022] [Indexed: 12/17/2022] Open
Abstract
The lung epithelium is constantly exposed to harmful agents present in the air that we breathe making it highly susceptible to damage. However, in instances of injury to the lung, it exhibits a remarkable capacity to regenerate injured tissue thanks to the presence of distinct stem and progenitor cell populations along the airway and alveolar epithelium. Mechanisms of repair are affected in chronic lung diseases such as idiopathic pulmonary fibrosis (IPF), a progressive life-threatening disorder characterized by the loss of alveolar structures, wherein excessive deposition of extracellular matrix components cause the distortion of tissue architecture that limits lung function and impairs tissue repair. Here, we review the most recent findings of a study of epithelial cells with progenitor behavior that contribute to tissue repair as well as the mechanisms involved in mouse and human lung regeneration. In addition, we describe therapeutic strategies to promote or induce lung regeneration and the cell-based strategies tested in clinical trials for the treatment of IPF. Finally, we discuss the challenges, concerns and limitations of applying these therapies of cell transplantation in IPF patients. Further research is still required to develop successful strategies focused on cell-based therapies to promote lung regeneration to restore lung architecture and function.
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