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Pai AC, Swatek AM, Lynch TJ, Ahlers BA, Ievlev V, Engelhardt JF, Parekh KR. Orthotopic Ferret Tracheal Transplantation Using a Recellularized Bioengineered Graft Produces Functional Epithelia. Bioengineering (Basel) 2023; 10:777. [PMID: 37508804 PMCID: PMC10376427 DOI: 10.3390/bioengineering10070777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/22/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
Tracheal grafts may be necessary to bridge long-segment defects after curative resection for airway obstructions. Bioengineered grafts have emerged as an appealing option, given the possibilities of altering the histologic and cellular profile of the conduit. We previously designed a bioreactor capable of luminally decellularizing and recellularizing a ferret trachea with surface airway epithelia (SAE) basal cells (BCs), and we sought to assess the fate of these grafts when transplanted in an orthotopic fashion. As adjuncts to the procedure, we investigated the use of a vascular endothelial growth factor (VEGF)-laden hydrogel and of immunosuppression (IS) in graft revascularization and viability. IS was shown to limit early graft revascularization, but this effect could be counteracted with VEGF supplementation. Submucosal gland (SMG) loss was shown to be inevitable regardless of the revascularization strategy. Lastly, the bioengineered tracheas survived one month after transplant with differentiation of our implanted BCs that then transitioned into a recipient-derived functional epithelium. The work presented in this manuscript has important implications for future cellular and regenerative therapies.
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Affiliation(s)
- Albert C. Pai
- Department of Cardiothoracic Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (A.C.P.); (A.M.S.)
| | - Anthony M. Swatek
- Department of Cardiothoracic Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (A.C.P.); (A.M.S.)
| | - Thomas J. Lynch
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, IA 52242, USA; (T.J.L.); (B.A.A.); (V.I.); (J.F.E.)
| | - Bethany A. Ahlers
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, IA 52242, USA; (T.J.L.); (B.A.A.); (V.I.); (J.F.E.)
| | - Vitaly Ievlev
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, IA 52242, USA; (T.J.L.); (B.A.A.); (V.I.); (J.F.E.)
| | - John F. Engelhardt
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, IA 52242, USA; (T.J.L.); (B.A.A.); (V.I.); (J.F.E.)
| | - Kalpaj R. Parekh
- Department of Cardiothoracic Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA; (A.C.P.); (A.M.S.)
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2
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Boley PA, Lee CM, Schrock J, Yadav KK, Patil V, Suresh R, Lu S, Feng MM, Hanson J, Channappanavar R, Kenney SP, Renukaradhya GJ. Enhanced mucosal immune responses and reduced viral load in the respiratory tract of ferrets to intranasal lipid nanoparticle-based SARS-CoV-2 proteins and mRNA vaccines. J Nanobiotechnology 2023; 21:60. [PMID: 36814238 PMCID: PMC9944789 DOI: 10.1186/s12951-023-01816-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 02/14/2023] [Indexed: 02/24/2023] Open
Abstract
BACKGROUND Unlike the injectable vaccines, intranasal lipid nanoparticle (NP)-based adjuvanted vaccine is promising to protect against local infection and viral transmission. Infection of ferrets with SARS-CoV-2 results in typical respiratory disease and pathology akin to in humans, suggesting that the ferret model may be ideal for intranasal vaccine studies. RESULTS We developed SARS-CoV-2 subunit vaccine containing both Spike receptor binding domain (S-RBD) and Nucleocapsid (N) proteins (NP-COVID-Proteins) or their mRNA (NP-COVID-mRNA) and NP-monosodium urate adjuvant. Both the candidate vaccines in intranasal vaccinated aged ferrets substantially reduced the replicating virus in the entire respiratory tract. Specifically, the NP-COVID-Proteins vaccine did relatively better in clearing the virus from the nasal passage early post challenge infection. The immune gene expression in NP-COVID-Proteins vaccinates indicated increased levels of mRNA of IFNα, MCP1 and IL-4 in lungs and nasal turbinates, and IFNγ and IL-2 in lungs; while proinflammatory mediators IL-1β and IL-8 mRNA levels in lungs were downregulated. In NP-COVID-Proteins vaccinated ferrets S-RBD and N protein specific IgG antibodies in the serum were substantially increased at both day post challenge (DPC) 7 and DPC 14, while the virus neutralizing antibody titers were relatively better induced by mRNA versus the proteins-based vaccine. In conclusion, intranasal NP-COVID-Proteins vaccine induced balanced Th1 and Th2 immune responses in the respiratory tract, while NP-COVID-mRNA vaccine primarily elicited antibody responses. CONCLUSIONS Intranasal NP-COVID-Proteins vaccine may be an ideal candidate to elicit increased breadth of immunity against SARS-CoV-2 variants.
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Affiliation(s)
- Patricia A Boley
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Carolyn M Lee
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Jennifer Schrock
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Kush Kumar Yadav
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Veerupaxagouda Patil
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Raksha Suresh
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Songqing Lu
- Dynamic Entropy Technology LLC, Building B, 1028 W. Nixon St., Pasco, WA, 99301-5216, USA
| | - Maoqi Mark Feng
- Dynamic Entropy Technology LLC, Building B, 1028 W. Nixon St., Pasco, WA, 99301-5216, USA
| | - Juliette Hanson
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA
| | - Rudra Channappanavar
- Department of Veterinary Pathobiology, Oklahoma Center for Respiratory and Infectious Diseases, Oklahoma State University, Stillwater, OK, 74078, USA
| | - Scott P Kenney
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA.
| | - Gourapura J Renukaradhya
- Center for Food Animal Health, Department of Animal Sciences, The Ohio State University, 1680 Madison Avenue, Wooster, OH, 44691, USA.
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3
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Lactobacillus for ribosome peptide editing cancer. Clin Transl Oncol 2023; 25:1522-1544. [PMID: 36694080 PMCID: PMC9873400 DOI: 10.1007/s12094-022-03066-5] [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: 09/28/2022] [Accepted: 12/24/2022] [Indexed: 01/25/2023]
Abstract
This study reviews newly discovered insect peptide point mutations as new possible cancer research targets. To interpret newly discovered peptide point mutations in insects as new possible cancer research targets, we focused on the numerous peptide changes found in the 'CSP' family on the sex pheromone gland of the female silkworm moth Bombyx mori. We predict that the Bombyx peptide modifications will have a significant effect on cancer CUP (cancers of unknown primary) therapy and that bacterial peptide editing techniques, specifically Lactobacillus combined to CRISPR, will be used to regulate ribosomes and treat cancer in humans.
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4
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Varma R, Poon J, Liao Z, Aitchison JS, Waddell TK, Karoubi G, McGuigan AP. Planar organization of airway epithelial cell morphology using hydrogel grooves during ciliogenesis fails to induce ciliary alignment. Biomater Sci 2021; 10:396-409. [PMID: 34897300 DOI: 10.1039/d1bm01327k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Topographical cues are known to influence cell organization both in native tissues and in vitro. In the trachea, the matrix beneath the epithelial lining is composed of collagen fibres that run along the long axis of the airway. Previous studies have shown that grooved topography can induce morphological and cytoskeletal alignment in epithelial cell lines. In the present work we assessed the impact of substrate topography on the organization of primary human tracheal epithelial cells (HTECs) and human induced pluripotent stem cell (hiPSC)-derived airway progenitors and the resulting alignment of cilia after maturation of the airway cells under Air-Liquid-Interface (ALI) culture. Grooves with optimized dimensions were imprinted into collagen vitrigel membranes (CVM) to produce gel inserts for ALI culture. Grooved CVM substrates induced cell alignment in HTECs and hiPSC airway progenitors in submerged culture. Further, both cell types were able to terminally differentiate into a multi-ciliated epithelium on both flat and groove CVM substrates. When exposed to ALI conditions, HTECs lost alignment after 14 days. Meanwhile, hiPSC-derived airway progenitors maintained their alignment throughout 31 days of ALI culture. Interestingly, neither initial alignment on the grooves, nor maintained alignment on the grooves induced alignment of cilia basal bodies, an indication of the direction of ciliary beating direction in the airway cells. Planar organization of airway cells during or prior to ciliogenesis therefore does not appear to be a feasible strategy to control cilia organization and subsequent airway epithelial function and additional cues are likely necessary to produce cilia alignment.
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Affiliation(s)
- Ratna Varma
- Institute of Biomedical Engineering (BME), University of Toronto, 164 College St, Toronto, ON, M5S 3G9, Canada. .,Latner Thoracic Surgery Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto General Hospital, University of Toronto, 101 College St, Toronto, ON, M5G 0A3, Canada.
| | - James Poon
- Institute of Biomedical Engineering (BME), University of Toronto, 164 College St, Toronto, ON, M5S 3G9, Canada. .,Latner Thoracic Surgery Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto General Hospital, University of Toronto, 101 College St, Toronto, ON, M5G 0A3, Canada.
| | - Zhongfa Liao
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Rd, Toronto, ON M5S 3G8, Canada
| | - J Stewart Aitchison
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Rd, Toronto, ON M5S 3G8, Canada
| | - Thomas K Waddell
- Institute of Biomedical Engineering (BME), University of Toronto, 164 College St, Toronto, ON, M5S 3G9, Canada. .,Latner Thoracic Surgery Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto General Hospital, University of Toronto, 101 College St, Toronto, ON, M5G 0A3, Canada.
| | - Golnaz Karoubi
- Latner Thoracic Surgery Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto General Hospital, University of Toronto, 101 College St, Toronto, ON, M5G 0A3, Canada. .,Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Circle, Toronto, ON, M5S 3G8, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada
| | - Alison P McGuigan
- Institute of Biomedical Engineering (BME), University of Toronto, 164 College St, Toronto, ON, M5S 3G9, Canada. .,Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St, Toronto, ON, M5S 3E5, Canada
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5
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Kiyokawa H, Morimoto M. Molecular crosstalk in tracheal development and its recurrence in adult tissue regeneration. Dev Dyn 2021; 250:1552-1567. [PMID: 33840142 PMCID: PMC8596979 DOI: 10.1002/dvdy.345] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/05/2021] [Accepted: 04/06/2021] [Indexed: 12/17/2022] Open
Abstract
The trachea is a rigid air duct with some mobility, which comprises the upper region of the respiratory tract and delivers inhaled air to alveoli for gas exchange. During development, the tracheal primordium is first established at the ventral anterior foregut by interactions between the epithelium and mesenchyme through various signaling pathways, such as Wnt, Bmp, retinoic acid, Shh, and Fgf, and then segregates from digestive organs. Abnormalities in this crosstalk result in lethal congenital diseases, such as tracheal agenesis. Interestingly, these molecular mechanisms also play roles in tissue regeneration in adulthood, although it remains less understood compared with their roles in embryonic development. In this review, we discuss cellular and molecular mechanisms of trachea development that regulate the morphogenesis of this simple tubular structure and identities of individual differentiated cells. We also discuss how the facultative regeneration capacity of the epithelium is established during development and maintained in adulthood.
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Affiliation(s)
- Hirofumi Kiyokawa
- Laboratory for Lung Development and RegenerationRIKEN Center for Biosystems Dynamics ResearchKobeJapan
| | - Mitsuru Morimoto
- Laboratory for Lung Development and RegenerationRIKEN Center for Biosystems Dynamics ResearchKobeJapan
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6
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Tang Y, Yan Z, Engelhardt JF. Viral Vectors, Animal Models, and Cellular Targets for Gene Therapy of Cystic Fibrosis Lung Disease. Hum Gene Ther 2020; 31:524-537. [PMID: 32138545 PMCID: PMC7232698 DOI: 10.1089/hum.2020.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/05/2020] [Indexed: 12/14/2022] Open
Abstract
After more than two decades since clinical trials tested the first use of recombinant adeno-associated virus (rAAV) to treat cystic fibrosis (CF) lung disease, gene therapy for this disorder has undergone a tremendous resurgence. Fueling this enthusiasm has been an enhanced understanding of rAAV transduction biology and cellular processes that limit transduction of airway epithelia, the development of new rAAV serotypes and other vector systems with high-level tropism for airway epithelial cells, an improved understanding of CF lung pathogenesis and the cellular targets for gene therapy, and the development of new animal models that reproduce the human CF disease phenotype. These advances have created a preclinical path for both assessing the efficacy of gene therapies in the CF lung and interrogating the target cell types in the lung required for complementation of the CF disease state. Lessons learned from early gene therapy attempts with rAAV in the CF lung have guided thinking for the testing of next-generation vector systems. Although unknown questions still remain regarding the cellular targets in the lung that are required or sufficient to complement CF lung disease, the field is now well positioned to tackle these challenges. This review will highlight the role that next-generation CF animal models are playing in the preclinical development of gene therapies for CF lung disease and the knowledge gaps in disease pathophysiology that these models are attempting to fill.
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Affiliation(s)
- Yinghua Tang
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Ziying Yan
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - John F. Engelhardt
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
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7
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Yang Y, Cardoso WV. Stem Cells Sheltered from Air-Raids Repair Airways. Cell Stem Cell 2019; 22:613-614. [PMID: 29727674 DOI: 10.1016/j.stem.2018.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Submucosal glands contribute to the luminal secretions of conducting airways in the respiratory tract. In this issue of Cell Stem Cell, both Tata et al. (2018) and Lynch et al. (2018) report that myoepithelial cells of submucosal glands serve as reserve stem cells to regenerate the damaged surface epithelium following severe airway injury.
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Affiliation(s)
- Ying Yang
- Columbia Center for Human Development and Pulmonary Allergy Critical Care, Department of Medicine, and Department of Genetics and Development, Columbia University Medical Center, New York, NY 10032, USA
| | - Wellington V Cardoso
- Columbia Center for Human Development and Pulmonary Allergy Critical Care, Department of Medicine, and Department of Genetics and Development, Columbia University Medical Center, New York, NY 10032, USA.
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8
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Abstract
Epithelial stem cells reside within multiple regions of the lung where they renew various region-specific cells. In addition, there are multiple routes of regeneration after injury through built-in heterogeneity within stem cell populations and through a capacity for cellular plasticity among differentiated cells. These processes are important facets of respiratory tissue resiliency and organism survival. However, this regenerative capacity is not limitless, and repetitive or chronic injuries, environmental stresses, or underlying factors of disease may ultimately lead to or contribute to tissue remodeling and end-stage lung disease. This chapter will review stem cell heterogeneity among pulmonary epithelia in the lower respiratory system, discuss recent findings that may challenge long-held scientific paradigms, and identify several clinically relevant research opportunities for regenerative medicine.
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9
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Nikolić MZ, Sun D, Rawlins EL. Human lung development: recent progress and new challenges. Development 2018; 145:145/16/dev163485. [PMID: 30111617 PMCID: PMC6124546 DOI: 10.1242/dev.163485] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Recent studies have revealed biologically significant differences between human and mouse lung development, and have reported new in vitro systems that allow experimental manipulation of human lung models. At the same time, emerging clinical data suggest that the origins of some adult lung diseases are found in embryonic development and childhood. The convergence of these research themes has fuelled a resurgence of interest in human lung developmental biology. In this Review, we discuss our current understanding of human lung development, which has been profoundly influenced by studies in mice and, more recently, by experiments using in vitro human lung developmental models and RNA sequencing of human foetal lung tissue. Together, these approaches are helping to shed light on the mechanisms underlying human lung development and disease, and may help pave the way for new therapies. Summary: This Review describes how recent technological advances have shed light on the mechanisms underlying human lung development and disease, and outlines the future challenges in this field.
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Affiliation(s)
- Marko Z Nikolić
- Wellcome Trust/CRUK Gurdon Institute, Wellcome Trust/MRC Stem Cell Institute, Department of Pathology, University of Cambridge, Cambridge CB2 1QN, UK.,University of Cambridge School of Clinical Medicine, Department of Medicine, Cambridge CB2 0QQ, UK
| | - Dawei Sun
- Wellcome Trust/CRUK Gurdon Institute, Wellcome Trust/MRC Stem Cell Institute, Department of Pathology, University of Cambridge, Cambridge CB2 1QN, UK
| | - Emma L Rawlins
- Wellcome Trust/CRUK Gurdon Institute, Wellcome Trust/MRC Stem Cell Institute, Department of Pathology, University of Cambridge, Cambridge CB2 1QN, UK
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10
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Lynch TJ, Anderson PJ, Rotti PG, Tyler SR, Crooke AK, Choi SH, Montoro DT, Silverman CL, Shahin W, Zhao R, Jensen-Cody CW, Adamcakova-Dodd A, Evans TIA, Xie W, Zhang Y, Mou H, Herring BP, Thorne PS, Rajagopal J, Yeaman C, Parekh KR, Engelhardt JF. Submucosal Gland Myoepithelial Cells Are Reserve Stem Cells That Can Regenerate Mouse Tracheal Epithelium. Cell Stem Cell 2018; 22:653-667.e5. [PMID: 29656941 DOI: 10.1016/j.stem.2018.03.017] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 01/25/2018] [Accepted: 03/21/2018] [Indexed: 12/18/2022]
Abstract
The mouse trachea is thought to contain two distinct stem cell compartments that contribute to airway repair-basal cells in the surface airway epithelium (SAE) and an unknown submucosal gland (SMG) cell type. Whether a lineage relationship exists between these two stem cell compartments remains unclear. Using lineage tracing of glandular myoepithelial cells (MECs), we demonstrate that MECs can give rise to seven cell types of the SAE and SMGs following severe airway injury. MECs progressively adopted a basal cell phenotype on the SAE and established lasting progenitors capable of further regeneration following reinjury. MECs activate Wnt-regulated transcription factors (Lef-1/TCF7) following injury and Lef-1 induction in cultured MECs promoted transition to a basal cell phenotype. Surprisingly, dose-dependent MEC conditional activation of Lef-1 in vivo promoted self-limited airway regeneration in the absence of injury. Thus, modulating the Lef-1 transcriptional program in MEC-derived progenitors may have regenerative medicine applications for lung diseases.
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Affiliation(s)
- Thomas J Lynch
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Preston J Anderson
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Pavana G Rotti
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Scott R Tyler
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Adrianne K Crooke
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Soon H Choi
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Daniel T Montoro
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Carolyn L Silverman
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Weam Shahin
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Rui Zhao
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | | | - Andrea Adamcakova-Dodd
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
| | - T Idil Apak Evans
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Weiliang Xie
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Yulong Zhang
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Hongmei Mou
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - B Paul Herring
- Department of Cellular and Integrative Physiology, Indiana University, Indianapolis, IN 46202, USA
| | - Peter S Thorne
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA 52242, USA
| | - Jayaraj Rajagopal
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Charles Yeaman
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Kalpaj R Parekh
- Department of Cardiothoracic Surgery, University of Iowa, Iowa City, IA 52242, USA
| | - John F Engelhardt
- Department of Anatomy & Cell Biology, University of Iowa, Iowa City, IA 52242, USA.
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11
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Anderson PJ, Lynch TJ, Engelhardt JF. Multipotent Myoepithelial Progenitor Cells Are Born Early during Airway Submucosal Gland Development. Am J Respir Cell Mol Biol 2017; 56:716-726. [PMID: 28125268 DOI: 10.1165/rcmb.2016-0304oc] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Airway submucosal glands (SMGs) are facultative stem cell niches for the surface epithelium, but the phenotype of the SMG-derived progenitor cells remains unclear. In other organs, glandular myoepithelial cells (MECs) have been proposed to be multipotent progenitors for luminal cells. We sought to determine the developmental phase during which mouse tracheal glandular MECs are born and whether these MECs are progenitors for other cell phenotypes during SMG morphogenesis. To approach this question, we localized two MEC protein markers (α-smooth muscle actin [αSMA/ACTA2] and smooth muscle myosin heavy chain 11 [SMMHC/MYH11]) during various stages of SMG development (placode, elongation, branching, and differentiation) and used ACTA2-CreERT2 and MYH11-CreERT2 transgenic mice to fate map MEC-derived lineages during SMG morphogenesis. Both αSMA- and SMMHC-expressing cells emerged early after placode formation and during the elongation phase of SMG development. Lineage tracing in newborn mice demonstrated that lineage-positive MECs are born at the tips of invading tubules during the elongation phase of gland development. Lineage-positive MECs born within the first 7 days after birth gave rise to the largest percentage of multipotent progenitors capable of contributing to myoepithelial, serous, mucous, and ductal cell lineages. Serial tamoxifen-induction of both Cre-driver lines demonstrated that lineage-positive multipotent MECs contribute to ∼ 60% of glandular cells by 21 days after birth. In contrast, lineage-traced MECs did not contribute to cell types in the surface airway epithelium. These findings demonstrate that MECs born early during SMG morphogenesis are multipotent progenitors with the capacity to differentiate into other glandular cell types.
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Affiliation(s)
- Preston J Anderson
- 1 Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa.,2 Iowa Biosciences Academy, Iowa City, Iowa; and.,3 Iowa Center for Research by Undergraduates, Iowa City, Iowa
| | - Thomas J Lynch
- 1 Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa
| | - John F Engelhardt
- 1 Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa
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12
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Lynch TJ, Anderson PJ, Xie W, Crooke AK, Liu X, Tyler SR, Luo M, Kusner DM, Zhang Y, Neff T, Burnette DC, Walters KS, Goodheart MJ, Parekh KR, Engelhardt JF. Wnt Signaling Regulates Airway Epithelial Stem Cells in Adult Murine Submucosal Glands. Stem Cells 2016; 34:2758-2771. [PMID: 27341073 DOI: 10.1002/stem.2443] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 05/08/2016] [Accepted: 05/24/2016] [Indexed: 12/19/2022]
Abstract
Wnt signaling is required for lineage commitment of glandular stem cells (SCs) during tracheal submucosal gland (SMG) morphogenesis from the surface airway epithelium (SAE). Whether similar Wnt-dependent processes coordinate SC expansion in adult SMGs following airway injury remains unknown. We found that two Wnt-reporters in mice (BAT-gal and TCF/Lef:H2B-GFP) are coexpressed in actively cycling SCs of primordial glandular placodes and in a small subset of adult SMG progenitor cells that enter the cell cycle 24 hours following airway injury. At homeostasis, these Wnt reporters showed nonoverlapping cellular patterns of expression in the SAE and SMGs. Following tracheal injury, proliferation was accompanied by dynamic changes in Wnt-reporter activity and the analysis of 56 Wnt-related signaling genes revealed unique temporal changes in expression within proximal (gland-containing) and distal (gland-free) portions of the trachea. Wnt stimulation in vivo and in vitro promoted epithelial proliferation in both SMGs and the SAE. Interestingly, slowly cycling nucleotide label-retaining cells (LRCs) of SMGs were spatially positioned near clusters of BAT-gal positive serous tubules. Isolation and culture of tet-inducible H2B-GFP LRCs demonstrated that SMG LRCs were more proliferative than SAE LRCs and culture expanded SMG-derived progenitor cells outcompeted SAE-derived progenitors in regeneration of tracheal xenograft epithelium using a clonal analysis competition assay. SMG-derived progenitors were also multipotent for cell types in the SAE and formed gland-like structures in xenografts. These studies demonstrate the importance of Wnt signals in modulating SC phenotypes within tracheal niches and provide new insight into phenotypic differences of SMG and SAE SCs. Stem Cells 2016;34:2758-2771.
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Affiliation(s)
- Thomas J Lynch
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA
| | - Preston J Anderson
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA
| | - Weiliang Xie
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA.,Molecular and Cellular Biology Program, University of Iowa, Iowa City, Iowa, USA
| | - Adrianne K Crooke
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA
| | - Xiaoming Liu
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA.,Center for Gene Therapy, University of Iowa, Iowa City, Iowa, USA
| | - Scott R Tyler
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA.,Molecular and Cellular Biology Program, University of Iowa, Iowa City, Iowa, USA
| | - Meihui Luo
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA
| | - David M Kusner
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA
| | - Yulong Zhang
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA
| | - Traci Neff
- Department of Obstetrics and Gynecology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Daniel C Burnette
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA
| | | | - Michael J Goodheart
- Department of Obstetrics and Gynecology, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
| | - Kalpaj R Parekh
- Department of Cardiothoracic Surgery, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - John F Engelhardt
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa, USA.,Center for Gene Therapy, University of Iowa, Iowa City, Iowa, USA
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13
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Zhang H, Fu W, Xu Z. Re-epithelialization: a key element in tracheal tissue engineering. Regen Med 2015; 10:1005-23. [PMID: 26388452 DOI: 10.2217/rme.15.68] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Trachea-tissue engineering is a thriving new field in regenerative medicine that is reaching maturity and yielding numerous promising results. In view of the crucial role that the epithelium plays in the trachea, re-epithelialization of tracheal substitutes has gradually emerged as the focus of studies in tissue-engineered trachea. Recent progress in our understanding of stem cell biology, growth factor interactions and transplantation immunobiology offer the prospect of optimization of a tissue-engineered tracheal epithelium. In addition, advances in cell culture technology and successful applications of clinical transplantation are opening up new avenues for the construction of a tissue-engineered tracheal epithelium. Therefore, this review summarizes current advances, unresolved obstacles and future directions in the reconstruction of a tissue-engineered tracheal epithelium.
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Affiliation(s)
- Hengyi Zhang
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, 1678 Dong Fang Road, Shanghai 200127, China
| | - Wei Fu
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, 1678 Dong Fang Road, Shanghai 200127, China.,Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, 1678 Dong Fang Road, Shanghai 200127, China
| | - Zhiwei Xu
- Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, 1678 Dong Fang Road, Shanghai 200127, China
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Mucin Binding Reduces Colistin Antimicrobial Activity. Antimicrob Agents Chemother 2015; 59:5925-31. [PMID: 26169405 DOI: 10.1128/aac.00808-15] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Accepted: 07/04/2015] [Indexed: 11/20/2022] Open
Abstract
Colistin has found increasing use in treating drug-resistant bacterial lung infections, but potential interactions with pulmonary biomolecules have not been investigated. We postulated that colistin, like aminoglycoside antibiotics, may bind to secretory mucin in sputum or epithelial mucin that lines airways, reducing free drug levels. To test this hypothesis, we measured binding of colistin and other antibiotics to porcine mucin, a family of densely glycosylated proteins used as a surrogate for human sputum and airway mucin. Antibiotics were incubated in dialysis tubing with or without mucin, and concentrations of unbound antibiotics able to penetrate the dialysis tubing were measured over time using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The percentage of antibiotic measured in the dialysate after 4 h in the presence of mucin, relative to the amount without mucin, was 15% for colistin, 16% for polymyxin B, 19% for tobramycin, 52% for ciprofloxacin, and 78% for daptomycin. Antibiotics with the strongest mucin binding had an overall polybasic positive charge, whereas those with comparatively little binding were less basic. When comparing MICs measured with or without added mucin, colistin and polymyxin B showed >100-fold increases in MICs for multiple Gram-negative bacteria. Preclinical evaluation of mucin binding should become a standard procedure when considering the potential pulmonary use of new or existing antibiotics, particularly those with a polybasic overall charge. In the airways, mucin binding may reduce the antibacterial efficacy of inhaled or intravenously administered colistin, and the presence of sub-MIC effective antibiotic concentrations could result in the development of antibiotic resistance.
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15
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Lynch TJ, Engelhardt JF. Progenitor cells in proximal airway epithelial development and regeneration. J Cell Biochem 2015; 115:1637-45. [PMID: 24818588 DOI: 10.1002/jcb.24834] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 05/08/2014] [Indexed: 12/15/2022]
Abstract
Multiple distinct epithelial domains are found throughout the airway that are distinguishable by location, structure, function, and cell-type composition. Several progenitor cell populations in the proximal airway have been identified to reside in confined microenvironmental niches including the submucosal glands (SMGs), which are embedded in the tracheal connective tissue between the surface epithelium and cartilage, and basal cells that reside within the surface airway epithelium (SAE). Current research suggests that regulatory pathways that coordinate development of the proximal airway and establishment of progenitor cell niches may overlap with pathways that control progenitor cell responses during airway regeneration following injury. SMGs have been shown to harbor epithelial progenitor cells, and this niche is dysregulated in diseases such as cystic fibrosis. However, mechanisms that regulate progenitor cell proliferation and maintenance within this glandular niche are not completely understood. Here we discuss glandular progenitor cells during development and regeneration of the proximal airway and compare properties of glandular progenitors to those of basal cell progenitors in the SAE. Further investigation into glandular progenitor cell control will provide a direction for interrogating therapeutic interventions to correct aberrant conditions affecting the SMGs in diseases such as cystic fibrosis, chronic bronchitis, and asthma.
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Affiliation(s)
- Thomas J Lynch
- Department of Anatomy & Cell Biology, University of Iowa Carver College of Medicine, Iowa City, Iowa, 52242
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16
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Yan Z, Stewart ZA, Sinn PL, Olsen JC, Hu J, McCray PB, Engelhardt JF. Ferret and pig models of cystic fibrosis: prospects and promise for gene therapy. HUM GENE THER CL DEV 2015; 26:38-49. [PMID: 25675143 PMCID: PMC4367511 DOI: 10.1089/humc.2014.154] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 12/26/2014] [Indexed: 12/13/2022] Open
Abstract
Large animal models of genetic diseases are rapidly becoming integral to biomedical research as technologies to manipulate the mammalian genome improve. The creation of cystic fibrosis (CF) ferrets and pigs is an example of such progress in animal modeling, with the disease phenotypes in the ferret and pig models more reflective of human CF disease than mouse models. The ferret and pig CF models also provide unique opportunities to develop and assess the effectiveness of gene and cell therapies to treat affected organs. In this review, we examine the organ disease phenotypes in these new CF models and the opportunities to test gene therapies at various stages of disease progression in affected organs. We then discuss the progress in developing recombinant replication-defective adenoviral, adeno-associated viral, and lentiviral vectors to target genes to the lung and pancreas in ferrets and pigs, the two most affected organs in CF. Through this review, we hope to convey the potential of these new animal models for developing CF gene and cell therapies.
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Affiliation(s)
- Ziying Yan
- Department of Anatomy and Cell Biology, University of Iowa School of Medicine, Iowa City, IA 52242
- Center for Gene Therapy of Cystic Fibrosis, University of Iowa School of Medicine, Iowa City, IA 52242
| | - Zoe A. Stewart
- Department of Surgery, University of Iowa School of Medicine, Iowa City, IA 52242
| | - Patrick L. Sinn
- Center for Gene Therapy of Cystic Fibrosis, University of Iowa School of Medicine, Iowa City, IA 52242
- Department of Pediatrics, University of Iowa School of Medicine, Iowa City, IA 52242
| | - John C. Olsen
- Cystic Fibrosis/Pulmonary Research and Treatment Center, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Jim Hu
- Department of Laboratory Medicine and Pathobiology, Hospital for Sick Children and University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Paul B. McCray
- Center for Gene Therapy of Cystic Fibrosis, University of Iowa School of Medicine, Iowa City, IA 52242
- Department of Pediatrics, University of Iowa School of Medicine, Iowa City, IA 52242
| | - John F. Engelhardt
- Department of Anatomy and Cell Biology, University of Iowa School of Medicine, Iowa City, IA 52242
- Center for Gene Therapy of Cystic Fibrosis, University of Iowa School of Medicine, Iowa City, IA 52242
- Department of Internal Medicine, University of Iowa School of Medicine, Iowa City, IA 52242
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17
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18
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Van de Laar E, Clifford M, Hasenoeder S, Kim BR, Wang D, Lee S, Paterson J, Vu NM, Waddell TK, Keshavjee S, Tsao MS, Ailles L, Moghal N. Cell surface marker profiling of human tracheal basal cells reveals distinct subpopulations, identifies MST1/MSP as a mitogenic signal, and identifies new biomarkers for lung squamous cell carcinomas. Respir Res 2014; 15:160. [PMID: 25551685 PMCID: PMC4343068 DOI: 10.1186/s12931-014-0160-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 12/17/2014] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The large airways of the lungs (trachea and bronchi) are lined with a pseudostratified mucociliary epithelium, which is maintained by stem cells/progenitors within the basal cell compartment. Alterations in basal cell behavior can contribute to large airway diseases including squamous cell carcinomas (SQCCs). Basal cells have traditionally been thought of as a uniform population defined by basolateral position, cuboidal cell shape, and expression of pan-basal cell lineage markers like KRT5 and TP63. While some evidence suggests that basal cells are not all functionally equivalent, few heterogeneously expressed markers have been identified to purify and study subpopulations. In addition, few signaling pathways have been identified that regulate their cell behavior. The goals of this work were to investigate tracheal basal cell diversity and to identify new signaling pathways that regulate basal cell behavior. METHODS We used flow cytometry (FACS) to profile cell surface marker expression at a single cell level in primary human tracheal basal cell cultures that maintain stem cell/progenitor activity. FACS results were validated with tissue staining, in silico comparisons with normal basal cell and lung cancer datasets, and an in vitro proliferation assay. RESULTS We identified 105 surface markers, with 47 markers identifying potential subpopulations. These subpopulations generally fell into more (~ > 13%) or less abundant (~ < 6%) groups. Microarray gene expression profiling supported the heterogeneous expression of these markers in the total population, and immunostaining of large airway tissue suggested that some of these markers are relevant in vivo. 24 markers were enriched in lung SQCCs relative to adenocarcinomas, with four markers having prognostic significance in SQCCs. We also identified 33 signaling receptors, including the MST1R/RON growth factor receptor, whose ligand MST1/MSP was mitogenic for basal cells. CONCLUSION This work provides the largest description to date of molecular diversity among human large airway basal cells. Furthermore, these markers can be used to further study basal cell function in repair and disease, and may aid in the classification and study of SQCCs.
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Affiliation(s)
- Emily Van de Laar
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Monica Clifford
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Stefan Hasenoeder
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
- />Present address: Helmholtz Zentrum München, Institute of Stem Cell Research, Ingolstädter Landstrasse 1, 85746 Neuherberg, Germany
| | - Bo Ram Kim
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Dennis Wang
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Sharon Lee
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
- />Department of Applied Mathematics, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
| | - Josh Paterson
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Nancy M Vu
- />Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 USA
- />Present address: University of Utah School of Medicine, Salt Lake City, UT 84132 USA
| | - Thomas K Waddell
- />Toronto Lung Transplant Program, University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Shaf Keshavjee
- />Toronto Lung Transplant Program, University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Ming-Sound Tsao
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Laurie Ailles
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
| | - Nadeem Moghal
- />Department of Medical Biophysics, Ontario Cancer Institute/Campbell Family Cancer Research Institute/Princess Margaret Cancer Centre/University Health Network, University of Toronto, Toronto, ON M5G 1 L7 Canada
- />Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112 USA
- />Present address: Ontario Cancer Institute and Princess Margaret Hospital, University Health Network, Toronto, ON M5G 1 L7 Canada
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Yan Z, Stewart ZA, Sinn PL, Olsen JC, Hu J, McCray, Jr. PB, Engelhardt JF. Ferret and Pig Models of Cystic Fibrosis: Prospects and Promise for Gene Therapy. HUM GENE THER CL DEV 2014. [DOI: 10.1089/hum.2014.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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20
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Felton JM, Lucas CD, Rossi AG, Dransfield I. Eosinophils in the lung - modulating apoptosis and efferocytosis in airway inflammation. Front Immunol 2014; 5:302. [PMID: 25071763 PMCID: PMC4076794 DOI: 10.3389/fimmu.2014.00302] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 06/15/2014] [Indexed: 01/09/2023] Open
Abstract
Due to the key role of the lung in efficient transfer of oxygen in exchange for carbon dioxide, a controlled inflammatory response is essential for restoration of tissue homeostasis following airway exposure to bacterial pathogens or environmental toxins. Unregulated or prolonged inflammatory responses in the lungs can lead to tissue damage, disrupting normal tissue architecture, and consequently compromising efficient gaseous exchange. Failure to resolve inflammation underlies the development and/or progression of a number of inflammatory lung diseases including asthma. Eosinophils, granulocytic cells of the innate immune system, are primarily involved in defense against parasitic infections. However, the propagation of the allergic inflammatory response in chronic asthma is thought to involve excessive recruitment and impaired apoptosis of eosinophils together with defective phagocytic clearance of apoptotic cells (efferocytosis). In terms of therapeutic approaches for the treatment of asthma, the widespread use of glucocorticoids is associated with a number of adverse health consequences after long-term use, while some patients suffer from steroid-resistant disease. A new approach for therapeutic intervention would be to promote the resolution of inflammation via modulation of eosinophil apoptosis and the phagocytic clearance of apoptotic cells. This review focuses on the mechanisms underpinning eosinophil-mediated lung damage, currently available treatments and therapeutic targets that might in future be harnessed to facilitate inflammation resolution by the manipulation of cell survival and clearance pathways.
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Affiliation(s)
- Jennifer M. Felton
- MRC Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Christopher D. Lucas
- MRC Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Adriano G. Rossi
- MRC Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Ian Dransfield
- MRC Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
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21
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Yan Z, Sun X, Evans IA, Tyler SR, Song Y, Liu X, Sui H, Engelhardt JF. Postentry processing of recombinant adeno-associated virus type 1 and transduction of the ferret lung are altered by a factor in airway secretions. Hum Gene Ther 2014; 24:786-96. [PMID: 23948055 DOI: 10.1089/hum.2013.137] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
We recently created a cystic fibrosis ferret model that acquires neonatal lung infection. To develop lung gene therapies for this model, we evaluated recombinant adeno-associated virus (rAAV)-mediated gene transfer to the neonatal ferret lung. Unlike in vitro ferret airway epithelial (FAE) cells, in vivo infection of the ferret lung with rAAV1 required proteasome inhibitors to achieve efficient airway transduction. We hypothesized that differences in transduction between these two systems were because of an in vivo secreted factor that alter the transduction biology of rAAV1. Indeed, treatment of rAAV1 with ferret airway secretory fluid (ASF) strongly inhibited rAAV1, but not rAAV2, transduction of primary FAE and HeLa cells. Properties of the ASF inhibitory factor included a strong affinity for the AAV1 capsid, heat-stability, negative charge, and sensitivity to endoproteinase Glu-C. ASF-treated rAAV1 dramatically inhibited apical transduction of FAE ALI cultures (512-fold), while only reducing viral entry by 55-fold, suggesting that postentry processing of virus was influenced by the inhibitor factor. Proteasome inhibitors rescued transduction in the presence of ASF (~1600-fold) without effecting virus internalization, while proteasome inhibitors only enhanced transduction 45-fold in the absence of ASF. These findings demonstrate that a factor in lung secretions can influence intracellular processing of rAAV1 in a proteasome-dependent fashion.
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Affiliation(s)
- Ziying Yan
- Department of Anatomy and Cell Biology, University of Iowa School of Medicine, Iowa City, IA 52242-1009, USA
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22
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Xie W, Lynch TJ, Liu X, Tyler SR, Yu S, Zhou X, Luo M, Kusner DM, Sun X, Yi Y, Zhang Y, Goodheart MJ, Parekh KR, Wells JM, Xue HH, Pevny LH, Engelhardt JF. Sox2 modulates Lef-1 expression during airway submucosal gland development. Am J Physiol Lung Cell Mol Physiol 2014; 306:L645-60. [PMID: 24487391 DOI: 10.1152/ajplung.00157.2013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Tracheobronchial submucosal glands (SMGs) are derived from one or more multipotent glandular stem cells that coalesce to form a placode in surface airway epithelium (SAE). Wnt/β-catenin-dependent induction of lymphoid enhancer factor (Lef-1) gene expression during placode formation is an early event required for SMG morphogenesis. We discovered that Sox2 expression is repressed as Lef-1 is induced within airway SMG placodes. Deletion of Lef-1 did not activate Sox2 expression in SMG placodes, demonstrating that Lef-1 activation does not directly inhibit Sox2 expression. Repression of Sox2 protein in SMG placodes occurred posttranscriptionally, since the activity of its endogenous promoter remained unchanged in SMG placodes. Thus we hypothesized that Sox2 transcriptionally represses Lef-1 expression in the SAE and that suppression of Sox2 in SMG placodes activates Wnt/β-catenin-dependent induction of Lef-1 during SMG morphogenesis. Consistent with this hypothesis, transcriptional reporter assays, ChIP analyses, and DNA-protein binding studies revealed a functional Sox2 DNA binding site in the Lef-1 promoter that is required for suppressing β-catenin-dependent transcription. In polarized primary airway epithelium, Wnt induction enhanced Lef-1 expression while also inhibiting Sox2 expression. Conditional deletion of Sox2 also enhanced Lef-1 expression in polarized primary airway epithelium, but this induction was significantly augmented by Wnt stimulation. Our findings provide the first evidence that Sox2 acts as a repressor to directly modulate Wnt-responsive transcription of the Lef-1 gene promoter. These studies support a model whereby Wnt signals and Sox2 dynamically regulate the expression of Lef-1 in airway epithelia and potentially also during SMG development.
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Affiliation(s)
- Weiliang Xie
- Rm. 1-111 BSB, Dept. of Anatomy and Cell Biology, Univ. of Iowa, 51 Newton Rd., Iowa City, IA 52242.
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23
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De Langhe SP, Reynolds SD. Wnt signaling in lung organogenesis. Organogenesis 2012; 4:100-8. [PMID: 19279721 DOI: 10.4161/org.4.2.5856] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 03/06/2008] [Indexed: 01/16/2023] Open
Abstract
Reporter transgene, knockout, and misexpression studies support the notion that Wnt/beta-catenin signaling regulates aspects of branching morphogenesis, regional specialization of the epithelium and mesenchyme, and establishment of progenitor cell pools. As demonstrated for other foregut endoderm-derived organs, beta-catenin and the Wnt/beta-catenin signaling pathway contribute to control of cellular proliferation, differentiation and migration. However, the contribution of Wnt/beta-catenin signaling to these processes is shaped by other signals impinging on target tissues. In this review, we will concentrate on roles for Wnt/beta-catenin in respiratory system development, including segregation of the conducting airway and alveolar compartments, specialization of the mesenchyme, and establishment of tracheal asymmetries and tracheal glands.
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Affiliation(s)
- Stijn P De Langhe
- Department of Pediatrics; National Jewish Medical Research Center; Denver, Colorado USA
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Wansleeben C, Barkauskas CE, Rock JR, Hogan BLM. Stem cells of the adult lung: their development and role in homeostasis, regeneration, and disease. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2012; 2:131-48. [DOI: 10.1002/wdev.58] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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25
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Giangreco A, Lu L, Mazzatti DJ, Spencer-Dene B, Nye E, Teixeira VH, Janes SM. Myd88 deficiency influences murine tracheal epithelial metaplasia and submucosal gland abundance. J Pathol 2011; 224:190-202. [PMID: 21557220 PMCID: PMC3434371 DOI: 10.1002/path.2876] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Tracheal epithelial remodelling, excess mucus production, and submucosal gland hyperplasia are features of numerous lung diseases, yet their origins remain poorly understood. Previous studies have suggested that NF-κB signalling may regulate airway epithelial homeostasis. The purpose of this study was to determine whether deletion of the NF-κB signalling pathway protein myeloid differentiation factor 88 (Myd88) influenced tracheal epithelial cell phenotype. We compared wild-type and Myd88-deficient or pharmacologically inhibited adult mouse tracheas and determined that in vivo Myd88 deletion resulted in increased submucosal gland number, secretory cell metaplasia, and excess mucus cell abundance. We also found that Myd88 was required for normal resolution after acute tracheal epithelial injury. Microarray analysis revealed that uninjured Myd88-deficient tracheas contained 103 transcripts that were differentially expressed relative to wild-type and all injured whole tracheal samples. These clustered into several ontologies and networks that are known to functionally influence epithelial cell phenotype. Comparing these transcripts to those expressed in airway progenitor cells revealed only five common genes, suggesting that Myd88 influences tracheal epithelial homeostasis through an extrinsic mechanism. Overall, this study represents the first identification of Myd88 as a regulator of adult tracheal epithelial cell phenotype. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Adam Giangreco
- Centre for Respiratory Research, University College London, Rayne Institute, 5 University Street, London WC1E 6JF, UK.
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García Campelo MR, Alonso Curbera G, Aparicio Gallego G, Grande Pulido E, Antón Aparicio LM. Stem cell and lung cancer development: blaming the Wnt, Hh and Notch signalling pathway. Clin Transl Oncol 2011; 13:77-83. [PMID: 21324794 DOI: 10.1007/s12094-011-0622-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Primary lung cancer may arise from the central (bronchial) or peripheral (bronchiolo-alveolar) compartments. However the origins of the different histological types of primary lung cancer are not well understood. Stem cells are believed to be crucial players in tumour development and there is much interest in identifying those compartments that harbour stem cells involved in lung cancer. Although the role of stem cells in carcinogenesis is not well characterised, emerging evidence is providing new insights into this process. Numerous studies have indicated that lung cancer is not a result of a sudden transforming event but a multistep process in which a sequence of molecular changes result in genetic and morphological aberrations. The exact sequence of molecular events involved in lung carcinogenesis is not yet well understood, therefore deeper knowledge of the aberrant stem cell fate signalling pathway could be crucial in the development of new drugs against the advanced setting.
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Wu X, Peters-Hall JR, Ghimbovschi S, Mimms R, Rose MC, Peña MT. Glandular gene expression of sinus mucosa in chronic rhinosinusitis with and without cystic fibrosis. Am J Respir Cell Mol Biol 2010; 45:525-33. [PMID: 21177983 DOI: 10.1165/rcmb.2010-0133oc] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Secretory cells in submucosal glands (SMGs) secrete antibacterial proteins and mucin glycoproteins into the apical lumen of the respiratory tract, and these are critical for innate immune mucosal integrity. Glandular hyperplasia is manifested in diseases with obstructive respiratory pathologies associated with mucous hypersecretion, and is predominant in the sinus mucosa of patients with chronic rhinosinusitis (CRS), cystic fibrosis (CF), and clinical symptoms of CRS. To gain insights into the molecular basis of SMG hyperplasia in CRS, gene expression microarray analyses were performed to identify the differences in global and specific gene expression in the sinus mucosa of control, CRS, and CRS/CF patients. A marked up-regulation of 11 glandular-associated genes in CRS and CRS/CF sinus mucosa was evident. The RNA and protein expressions of the four most highly up-regulated genes (DSG3, KRT14, PTHLH, and OTX2) were evaluated. An increased expression of DSG3, KRT14, and PTHLH was demonstrated at the mRNA and protein levels in both CRS and CRS/CF sinus mucosa, whereas the increased expression of OTX2 was evident only for CRS/CF sinus mucosa, implicating OTX2 as a CF-specific gene. Immunofluorescence analysis localized DSG3, PTHLH, and OTX2 to serous cells, and KRT14 to myoepithelial cells, in SMGs. Because glandular hyperplasia is a central histologic feature of CRS, the identification of overexpressed glandular genes in the sinus mucosa lays the groundwork for future studies of glandular hyperplasia, and may ultimately lead to the development of novel treatments for mucous hypersecretion in patients with CRS.
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Affiliation(s)
- Xiaofang Wu
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
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28
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Liu X, Luo M, Xie W, Wells JM, Goodheart MJ, Engelhardt JF. Sox17 modulates Wnt3A/beta-catenin-mediated transcriptional activation of the Lef-1 promoter. Am J Physiol Lung Cell Mol Physiol 2010; 299:L694-710. [PMID: 20802155 DOI: 10.1152/ajplung.00140.2010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Wnt/β-catenin-dependent activation of lymphoid enhancer factor 1 (Lef-1) plays an important role in numerous developmental processes. In this context, transcription of the Lef-1 gene is increased by Wnt-mediated TCF4/β-catenin activation on the Lef-1 promoter through mechanisms that remain poorly defined. In mouse airway submucosal gland progenitor cells, Wnt3A transiently induces Lef-1 gene expression, and this process is required for epithelial cell proliferation and glandular morphogenesis. In the present study, we sought to identify additional candidate transcriptional regulators of the Lef-1 gene during glandular morphogenesis. To this end, we found that Sox17 expression is dramatically downregulated in early glandular progenitor cells that induce Lef-1 expression. Wnt stimulation of undifferentiated primary airway epithelial cells induced similar changes in Sox17 and Lef-1 expression. Reporter assays revealed that ectopic expression of Sox17 suppresses Wnt3A/β-catenin activation of the Lef-1 promoter in cell lines. EMSA and ChIP analyses defined several Sox17- and TCF4-binding sites that collaborate in transcriptional control of the Lef-1 promoter. More specifically, Sox17 bound to four sites in the Lef-1 promoter, either directly or indirectly through TCF complexes. The DNA- or β-catenin-binding domains of Sox17 controlled context-specific binding of Sox17/TCF complexes on the Lef-1 promoter. Combinatorial site-directed mutagenesis of Sox17- or TCF-binding sites in the Lef-1 promoter demonstrated that these sites control Wnt/β-catenin-mediated induction and/or repression. These findings demonstrate for the first time that Sox17 can directly regulate Wnt/β-catenin-dependent transcription of the Lef-1 promoter and reveal new context-dependent binding sites in the Lef-1 promoter that facilitate protein-protein interactions between Sox17 and TCF4.
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Affiliation(s)
- Xiaoming Liu
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, Iowa 52240, USA
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Di Nardo P, Forte G, Ahluwalia A, Minieri M. Cardiac progenitor cells: potency and control. J Cell Physiol 2010; 224:590-600. [PMID: 20578234 DOI: 10.1002/jcp.22165] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Stem cell-based regeneration of the heart has focused much scientific and public attention being cardiac diseases the major cause of disability and death in industrialized countries. Innumerable efforts have been taken to unveil the mechanisms undergoing stem cell proliferation and fate, but much remains to be endeavoured for their application in clinical practice. Nevertheless, the discovery of progenitor cells resident within the cardiac tissue has sparked off enthusiasm about the possibility of efficiently and safely engineering them to repair the injured myocardium. Indeed, the early applications of the cardiac progenitor cells, mostly based on simplistic concepts and techniques, have failed highlighting the prerequisite of expanding the knowledge about progenitor cell features and microenvironmental conditioning. In this review, recent information on resident cardiac progenitor cells has been systematically gathered in order to create a valuable instrument to support investigators in their efforts to establish an efficient cardiac cell therapy.
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Affiliation(s)
- Paolo Di Nardo
- Dipartimento di Medicina Interna, Laboratorio di Cardiologia Molecolare e Cellulare, Università di Roma Tor Vergata, Roma, Italy.
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Livraghi A, Grubb BR, Hudson EJ, Wilkinson KJ, Sheehan JK, Mall MA, O'Neal WK, Boucher RC, Randell SH. Airway and lung pathology due to mucosal surface dehydration in {beta}-epithelial Na+ channel-overexpressing mice: role of TNF-{alpha} and IL-4R{alpha} signaling, influence of neonatal development, and limited efficacy of glucocorticoid treatment. THE JOURNAL OF IMMUNOLOGY 2009; 182:4357-67. [PMID: 19299736 DOI: 10.4049/jimmunol.0802557] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Overexpression of the epithelial Na(+) channel beta subunit (Scnn1b gene, betaENaC protein) in transgenic (Tg) mouse airways dehydrates mucosal surfaces, producing mucus obstruction, inflammation, and neonatal mortality. Airway inflammation includes macrophage activation, neutrophil and eosinophil recruitment, and elevated KC, TNF-alpha, and chitinase levels. These changes recapitulate aspects of complex human obstructive airway diseases, but their molecular mechanisms are poorly understood. We used genetic and pharmacologic approaches to identify pathways relevant to the development of Scnn1b-Tg mouse lung pathology. Genetic deletion of TNF-alpha or its receptor, TNFR1, had no measurable effect on the phenotype. Deletion of IL-4Ralpha abolished transient mucous secretory cell (MuSC) abundance and eosinophilia normally observed in neonatal wild-type mice. Similarly, IL-4Ralpha deficiency decreased MuSC and eosinophils in neonatal Scnn1b-Tg mice, which correlated with improved neonatal survival. However, chronic lung pathology in adult Scnn1b-Tg mice was not affected by IL-4Ralpha status. Prednisolone treatment ablated eosinophilia and MuSC in adult Scnn1b-Tg mice, but did not decrease mucus plugging or neutrophilia. These studies demonstrate that: 1) normal neonatal mouse airway development entails an IL-4Ralpha-dependent, transient abundance of MuSC and eosinophils; 2) absence of IL-4Ralpha improved neonatal survival of Scnn1b-Tg mice, likely reflecting decreased formation of asphyxiating mucus plugs; and 3) in Scnn1b-Tg mice, neutrophilia, mucus obstruction, and airspace enlargement are IL-4Ralpha- and TNF-alpha-independent, and only MuSC and eosinophilia are sensitive to glucocorticoids. Thus, manipulation of multiple pathways will likely be required to treat the complex pathogenesis caused by airway surface dehydration.
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Affiliation(s)
- Alessandra Livraghi
- Cystic Fibrosis/Pulmonary Research and Treatment Center, The University of North Carolina at Chapel Hill, 27599, USA.
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31
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Liu X, Luo M, Guo C, Yan Z, Wang Y, Lei-Butters DCM, Engelhardt JF. Analysis of adeno-associated virus progenitor cell transduction in mouse lung. Mol Ther 2008; 17:285-93. [PMID: 19034263 DOI: 10.1038/mt.2008.248] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Although recombinant adeno-associated virus (rAAV) has been widely used in lung gene therapy approaches, it remains unclear to what extent commonly used AAV serotypes transduce adult progenitors in the lung. In this study, we evaluated the life span and proliferative capacity of rAAV1-, 2-, and 5-transduced airway cells in mouse lung, using a LacZ-CRE reporter transgenic model and Cre-expressing rAAV. In this model, the expression of CRE recombinase led to permanent genetic marking of transduced cells and their descendants with LacZ. To investigate whether the rAAV-transduced cells included airway progenitors, we injured the airways of rAAV-infected mice with Naphthalene, while simultaneously labeling with 5-bromodeoxyuridine (BrdU) to identify slow-cycling progenitor/stem cells that entered the cell cycle and retained label. Both rAAV5 and rAAV1 vectors were capable of transducing a subset of long-lived Clara cells and alveolar type II (ATII) cells that retained nucleotide label and proliferated following lung injury. Importantly, rAAV1 and 5 appeared to preferentially transduce conducting airway epithelial progenitors that had the capacity to clonally expand, both in culture and in vivo following lung injury. These studies suggest that rAAV may be a useful vector for gene targeting of airway stem/progenitor cells.
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Affiliation(s)
- Xiaoming Liu
- Department of Anatomy and Cell Biology, College of Medicine, The University of Iowa, Iowa City, Iowa, USA
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32
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The glandular stem/progenitor cell niche in airway development and repair. Ann Am Thorac Soc 2008; 5:682-8. [PMID: 18684717 DOI: 10.1513/pats.200801-003aw] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Airway submucosal glands (SMGs) are major secretory structures that lie beneath the epithelium of the cartilaginous airway. These glands are believed to play important roles in normal lung function and airway innate immunity by secreting antibacterial factors, mucus, and fluid into the airway lumen. Recent studies have suggested that SMGs may additionally serve as a protective niche for adult epithelial stem/progenitor cells of the proximal airways. As in the case of other adult stem cell niches, SMGs are believed to provide the localized environmental signals required to both maintain and mobilize stem/progenitor cells, in the setting of normal cellular turnover or injury. Aberrant proliferation and differentiation of glandular stem/progenitor cells may be associated with several hypersecretory lung diseases, including chronic bronchitis, asthma, and cystic fibrosis. To better understand the molecular mechanisms that regulate the specification and proliferation of glandular stem/progenitor cells in lung diseases associated with SMG hypertrophy and hyperplasia, researchers have begun to search for the molecular signals and cell types responsible for establishing the glandular stem/progenitor cell niche, and to dissect how these determinants of the niche change in the setting of proximal airway injury and repair. Such studies have revealed certain similarities between stem/progenitor cell niches of the distal conducting airways and the SMGs of the proximal airways.
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Recent progress on tissue-resident adult stem cell biology and their therapeutic implications. ACTA ACUST UNITED AC 2008; 4:27-49. [PMID: 18288619 DOI: 10.1007/s12015-008-9008-2] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Recent progress in the field of the stem cell research has given new hopes to treat and even cure diverse degenerative disorders and incurable diseases in human. Particularly, the identification of a rare population of adult stem cells in the most tissues/organs in human has emerged as an attractive source of multipotent stem/progenitor cells for cell replacement-based therapies and tissue engineering in regenerative medicine. The tissue-resident adult stem/progenitor cells offer the possibility to stimulate their in vivo differentiation or to use their ex vivo expanded progenies for cell replacement-based therapies with multiple applications in human. Among the human diseases that could be treated by the stem cell-based therapies, there are hematopoietic and immune disorders, multiple degenerative disorders, such as Parkinson's and Alzheimer's diseases, type 1 or 2 diabetes mellitus as well as eye, liver, lung, skin and cardiovascular disorders and aggressive and metastatic cancers. In addition, the genetically-modified adult stem/progenitor cells could also be used as delivery system for expressing the therapeutic molecules in specific damaged areas of different tissues. Recent advances in cancer stem/progenitor cell research also offer the possibility to targeting these undifferentiated and malignant cells that provide critical functions in cancer initiation and progression and disease relapse for treating the patients diagnosed with the advanced and metastatic cancers which remain incurable in the clinics with the current therapies.
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Fischer AJ, Goss KL, Scheetz TE, Wohlford-Lenane CL, Snyder JM, McCray PB. Differential gene expression in human conducting airway surface epithelia and submucosal glands. Am J Respir Cell Mol Biol 2008; 40:189-99. [PMID: 18703793 DOI: 10.1165/rcmb.2008-0240oc] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Human conducting airways contain two anatomically distinct epithelial cell compartments: surface epithelium and submucosal glands (SMG). Surface epithelial cells interface directly with the environment and function in pathogen detection, fluid and electrolyte transport, and mucus elevation. SMG secrete antimicrobial molecules and most of the airway surface fluid. Despite the unique functional roles of surface epithelia and SMG, little is known about the differences in gene expression and cellular metabolism that orchestrate the specialized functions of these epithelial compartments. To approach this problem, we performed large-scale transcript profiling using epithelial cell samples obtained by laser capture microdissection (LCM) of human bronchus specimens. We found that SMG expressed high levels of many transcripts encoding known or putative innate immune factors, including lactoferrin, zinc alpha-2 glycoprotein, and proline-rich protein 4. By contrast, surface epithelial cells expressed high levels of genes involved in basic nutrient catabolism, xenobiotic clearance, and ciliated structure assembly. Selected confirmation of differentially expressed genes in surface and SMG epithelia demonstrated the predictive power of this approach in identifying genes with localized tissue expression. To characterize metabolic differences between surface epithelial cells and SMG, immunostaining for a mitochondrial marker (isocitrate dehydrogenase) was performed. Because greater staining was observed in the surface compartment, we predict that these cells use significantly more energy than SMG cells. This study illustrates the power of LCM in defining the roles of specific anatomic features in airway biology and may be useful in examining how disease states alter transcriptional programs in the conducting airways.
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Affiliation(s)
- Anthony J Fischer
- Department of Pediatrics, University of Iowa, Iowa City, IA 52242, USA
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Szotek PP, Chang HL, Zhang L, Preffer F, Dombkowski D, Donahoe PK, Teixeira J. Adult mouse myometrial label-retaining cells divide in response to gonadotropin stimulation. Stem Cells 2007; 25:1317-25. [PMID: 17289934 DOI: 10.1634/stemcells.2006-0204] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Conditional deletion of beta-catenin in the Müllerian duct mesenchyme results in a degenerative uterus characterized by replacement of the myometrial smooth muscle with adipose tissue. We hypothesized that the mouse myometrium houses somatic smooth muscle progenitor cells that are hormonally responsive and necessary for remodeling and regeneration during estrous cycling and pregnancy. We surmise that the phenotype observed in beta-catenin conditionally deleted mice is the result of dysregulation of these progenitor cells. The objective of this study was to identify the mouse myometrial smooth muscle progenitor cell and its niche, define the surface marker phenotype, and show a functional response of these cells to normal myometrial cycling. Uteri were labeled with 5-bromo-2'-deoxyuridine (BrdU) and chased for up to 14 weeks. Myometrial label-retaining cells (LRCs) were observed in the myometrium and stroma throughout the chase period. After 12 weeks, phenotypic analysis of the LRCs by immunofluorescence demonstrated that the majority of LRCs colocalized with alpha-smooth muscle actin, estrogen receptor-alpha, and beta-catenin. Flow cytometry of myometrial cells identified a myometrial Hoechst 33342 effluxing "side population" that expresses MISRII-Cre-driven YFP. Functional response of LRCs was investigated by human chorionic gonadotropin stimulation of week 12 chase mice and demonstrated sequential proliferation of LRCs in the endometrial stroma, followed by the myometrium. These results suggest that conventional myometrial regeneration and repair is executed by hormonally responsive stem or progenitor cells derived from the Müllerian duct mesenchyme. Disclosure of potential conflicts of interest is found at the end of this article.
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Affiliation(s)
- Paul P Szotek
- Pediatric Surgical Research Laboratories, Department of Surgery, Massachusetts General Hospital, Boston, MA 02114, USA
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Mimeault M, Batra SK. Concise review: recent advances on the significance of stem cells in tissue regeneration and cancer therapies. Stem Cells 2006; 24:2319-45. [PMID: 16794264 DOI: 10.1634/stemcells.2006-0066] [Citation(s) in RCA: 178] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this study, we report on recent advances on the functions of embryonic, fetal, and adult stem cell progenitors for tissue regeneration and cancer therapies. We describe new procedures for derivation and maturation of these stem cells into the tissue-specific cell progenitors. The localization of the adult stem cells and their niches, as well as their implication in the tissue repair after injuries and during cancer progression, are also described. The emphasis is on the interactions among certain developmental signaling factors, such as hormones, epidermal growth factor, hedgehog, Wnt/beta-catenin, and Notch. These factors and their pathways are involved in the stringent regulation of the self-renewal and/or differentiation of adult stem cells. Novel strategies for the treatment of both diverse degenerating disorders, by cell replacement, and some metastatic cancer types, by molecular targeting multiple tumorigenic signaling elements in cancer progenitor cells, are also illustrated.
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Affiliation(s)
- Murielle Mimeault
- Department of Biochemistry and Molecular Biology, Eppley Institute of Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska 68198-5870, USA.
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Abstract
The lung is composed of two major anatomically distinct regions-the conducting airways and gas-exchanging airspaces. From a cell biology standpoint, the conducting airways can be further divided into two major compartments, the tracheobronchial and bronchiolar airways, while the alveolar regions of the lung make up the gas-exchanging airspaces. Each of these regions consists of distinct epithelial cell types with unique cellular physiologies and stem cell compartments. This chapter focuses on model systems with which to study stem cells in the adult tracheobronchial airways, also referred to as the proximal airway of the lung. Important in such models is an appreciation for the diversity of stem cell niches in the conducting airways that provide localized environmental signals to both maintain and mobilize stem cells in the setting of airway injury and normal cellular turnover. Because cellular turnover in airways is relatively slow, methods for analysis of stem cells in vivo have required prior injury to the lung. In contrast, ex vivo and in vitro models for analysis of airway stem cells have used genetic markers to track lineage relationships together with reconstitution systems that mimic airway biology. Over the past decades, several widely acceptable methods have been developed and used in the characterization of adult airway stem/progenitor cells. These include localization of label-retaining cells (LRCs), retroviral tagging of epithelial cells seeded into xenografts, air-liquid interface cultures to track clonal proliferative potential, and multiple transgenic mouse models. This chapter reviews the biologic context and use of these models while providing detailed methods for several of the more broadly useful models for studying adult airway stem/progenitor cell types.
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Affiliation(s)
- Xiaoming Liu
- Center for Gene Therapy, University of Iowa, Iowa City, IA, USA
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Song Y, Salinas D, Nielson DW, Verkman AS. Hyperacidity of secreted fluid from submucosal glands in early cystic fibrosis. Am J Physiol Cell Physiol 2005; 290:C741-9. [PMID: 16207791 DOI: 10.1152/ajpcell.00379.2005] [Citation(s) in RCA: 137] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Prior studies have shown that fluid secretions from airway submucosal glands in cystic fibrosis (CF) are reduced and hyperviscous, possibly contributing to the pathogenesis of CF airway disease. Because the CF transmembrane conductance regulator (CFTR) protein can transport both chloride and bicarbonate, we investigated whether gland fluid pH is abnormal in early CF, using nasal biopsies from pediatric subjects having minimal CF lung disease. Gland fluid pH, measured in freshly secreted droplets under oil stained with BCECF-dextran, was 6.57 +/- 0.09 (mean +/- SE) in biopsies from six CF subjects, significantly lower than 7.18 +/- 0.06 in eight non-CF biopsies (P < 0.01). To rule out the possibility that the apparent gland fluid hyperacidity in CF results from modification of fluid pH by the airway surface, a microcannulation method was used to measure pH in fluid exiting gland orifices. In pig trachea and human bronchi, gland fluid pH was reduced by up to 0.45 units by CFTR inhibitors, but was not affected by amiloride. Acid base transport in the surface epithelium of pig trachea was studied from pH changes in 300-nl fluid droplets deposited onto the oil-covered airway surface. The droplets had specified ionic composition/pH and/or contained transporter activators/inhibitors. We found evidence for CFTR-dependent bicarbonate transport by the tracheal surface epithelium as well as ATP/histamine-stimulated proton secretion, but not for sodium/proton or chloride/bicarbonate exchange. These results provide evidence for intrinsic hyperacidity in CF gland fluid secretions, which may contribute to CF airway pathology.
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Affiliation(s)
- Yuanlin Song
- 1246 Health Sciences East Tower, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA 94143-0521, USA
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Majka SM, Beutz MA, Hagen M, Izzo AA, Voelkel N, Helm KM. Identification of novel resident pulmonary stem cells: form and function of the lung side population. Stem Cells 2005; 23:1073-81. [PMID: 15987674 DOI: 10.1634/stemcells.2005-0039] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Resident lung stem cells function to replace all lineages of pulmonary tissue, including mesenchyme, epithelium, and vasculature. The phenotype of the lung side population (SP) cells is currently under investigation; their function is currently unknown. Recent data suggest lung SP cells are an enriched tissue-specific source of organ-specific pulmonary precursors and, therefore, a source of adult stem cells. The adult lung SP cell population has been isolated and characterized for expression of markers indicative of stem cell, epithelial, and mesenchymal lineages. These studies determined that the adult mouse lung SP has epithelial and mesenchymal potential that resides within a CD45- mesenchymal subpopulation, as well as limited hematopoietic ability, which resides in the bone marrow-derived CD45+ subpopulation. The ability to identify these adult lung precursor cells allows us to further study the potential of these cells and their role in the regulation of tissue homeostasis and response to injury. The identification of this target population will potentially allow earlier treatment and, long term, a functional restoration of injured pulmonary tissue and lung health.
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Affiliation(s)
- Susan M Majka
- Department of Medicine, Cardiovascular Pulmonary Research Section, University of Colorado Health Sciences Center, 4200 East 9th Avenue, SOM 3811, mail stop B-133, Denver, Colorado 80262, USA.
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Sauty A, Aubert JD. Cellules souches et physiologie pulmonaire : nouveaux concepts. Rev Mal Respir 2005. [DOI: 10.1016/s0761-8425(05)72918-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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