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Li Z, Barnaby R, Nymon A, Roche C, Koeppen K, Ashare A, Hogan DA, Gerber SA, Taatjes DJ, Hampton TH, Stanton BA. P. aeruginosa tRNA-fMet halves secreted in outer membrane vesicles suppress lung inflammation in cystic fibrosis. Am J Physiol Lung Cell Mol Physiol 2024; 326:L574-L588. [PMID: 38440830 DOI: 10.1152/ajplung.00018.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/15/2024] [Accepted: 02/17/2024] [Indexed: 03/06/2024] Open
Abstract
Although tobramycin increases lung function in people with cystic fibrosis (pwCF), the density of Pseudomonas aeruginosa (P. aeruginosa) in the lungs is only modestly reduced by tobramycin; hence, the mechanism whereby tobramycin improves lung function is not completely understood. Here, we demonstrate that tobramycin increases 5' tRNA-fMet halves in outer membrane vesicles (OMVs) secreted by laboratory and CF clinical isolates of P. aeruginosa. The 5' tRNA-fMet halves are transferred from OMVs into primary CF human bronchial epithelial cells (CF-HBEC), decreasing OMV-induced IL-8 and IP-10 secretion. In mouse lungs, increased expression of the 5' tRNA-fMet halves in OMVs attenuated KC (murine homolog of IL-8) secretion and neutrophil recruitment. Furthermore, there was less IL-8 and neutrophils in bronchoalveolar lavage fluid isolated from pwCF during the period of exposure to tobramycin versus the period off tobramycin. In conclusion, we have shown in mice and in vitro studies on CF-HBEC that tobramycin reduces inflammation by increasing 5' tRNA-fMet halves in OMVs that are delivered to CF-HBEC and reduce IL-8 and neutrophilic airway inflammation. This effect is predicted to improve lung function in pwCF receiving tobramycin for P. aeruginosa infection.NEW & NOTEWORTHY The experiments in this report identify a novel mechanism, whereby tobramycin reduces inflammation in two models of CF. Tobramycin increased the secretion of tRNA-fMet halves in OMVs secreted by P. aeruginosa, which reduced the OMV-LPS-induced inflammatory response in primary cultures of CF-HBEC and in mouse lung, an effect predicted to reduce lung damage in pwCF.
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Affiliation(s)
- Zhongyou Li
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
| | - Roxanna Barnaby
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
| | - Amanda Nymon
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
| | - Carolyn Roche
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
| | - Katja Koeppen
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
| | - Alix Ashare
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
- Pulmonary and Critical Care Medicine, Dartmouth Health Medical Center, Lebanon, New Hampshire, United States
| | - Deborah A Hogan
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
| | - Scott A Gerber
- Dartmouth Health Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, United States
| | - Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Center for Biomedical Shared Resources, Larner College of Medicine, University of Vermont, Burlington, Vermont, United States
| | - Thomas H Hampton
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
| | - Bruce A Stanton
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2024:10.1007/s00418-024-02287-9. [PMID: 38642108 DOI: 10.1007/s00418-024-02287-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2024]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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3
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2024; 161:297-298. [PMID: 38498069 DOI: 10.1007/s00418-024-02276-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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4
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2024; 161:207-209. [PMID: 38416164 DOI: 10.1007/s00418-024-02271-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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5
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Li Z, Barnaby R, Nymon A, Roche C, Koeppen K, Ashare A, Hogan DA, Gerber SA, Taatjes DJ, Hampton TH, Stanton BA. P. aeruginosa tRNA-fMet halves secreted in outer membrane vesicles suppress lung inflammation in Cystic Fibrosis. bioRxiv 2024:2024.02.03.578737. [PMID: 38352468 PMCID: PMC10862835 DOI: 10.1101/2024.02.03.578737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
Although tobramycin increases lung function in people with cystic fibrosis (pwCF), the density of Pseudomonas aeruginosa (P. aeruginosa) in the lungs is only modestly reduced by tobramycin; hence, the mechanism whereby tobramycin improves lung function is not completely understood. Here, we demonstrate that tobramycin increases 5' tRNA-fMet halves in outer membrane vesicles (OMVs) secreted by laboratory and CF clinical isolates of P. aeruginosa . The 5' tRNA-fMet halves are transferred from OMVs into primary CF human bronchial epithelial cells (CF-HBEC), decreasing OMV-induced IL-8 and IP-10 secretion. In mouse lung, increased expression of the 5' tRNA-fMet halves in OMVs attenuated KC secretion and neutrophil recruitment. Furthermore, there was less IL-8 and neutrophils in bronchoalveolar lavage fluid isolated from pwCF during the period of exposure to tobramycin versus the period off tobramycin. In conclusion, we have shown in mice and in vitro studies on CF-HBEC that tobramycin reduces inflammation by increasing 5' tRNA-fMet halves in OMVs that are delivered to CF-HBEC and reduce IL-8 and neutrophilic airway inflammation. This effect is predicted to improve lung function in pwCF receiving tobramycin for P. aeruginosa infection. New and noteworthy The experiments in this report identify a novel mechanim whereby tobramycin reduces inflammation in two models of CF. Tobramycin increased the secretion of tRNA-fMet haves in OMVs secreted by P. aeruginiosa , which reduced the OMV-LPS induced inflammatory response in primary cultures of CF-HBEC and in mouse lung, an effect predicted to reduce lung damage in pwCF. Graphical abstract The anti-inflammatory effect of tobramycin mediated by 5' tRNA-fMet halves secreted in P. aeruginosa OMVs. (A) P. aeruginosa colonizes the CF lungs and secrets OMVs. OMVs diffuse through the mucus layer overlying bronchial epithelial cells and induce IL-8 secretion, which recruits neutrophils that causes lung damage. ( B ) Tobramycin increases 5' tRNA-fMet halves in OMVs secreted by P. aeruginosa . 5' tRNA-fMet halves are delivered into host cells after OMVs fuse with lipid rafts in CF-HBEC and down-regulate protein expression of MAPK10, IKBKG, and EP300, which suppresses IL-8 secretion and neutrophils in the lungs. A reduction in neutrophils in CF BALF is predicted to improve lung function and decrease lung damage.
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Sarkar S, Barnaby R, Nymon AB, Taatjes DJ, Kelley TJ, Stanton BA. Extracellular vesicles secreted by primary human bronchial epithelial cells reduce Pseudomonas aeruginosa burden and inflammation in cystic fibrosis mouse lung. Am J Physiol Lung Cell Mol Physiol 2024; 326:L164-L174. [PMID: 38084406 DOI: 10.1152/ajplung.00253.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/18/2023] [Accepted: 12/05/2023] [Indexed: 01/26/2024] Open
Abstract
Cystic fibrosis (CF) results in a reduction in the volume of airway surface liquid, increased accumulation of viscous mucus, persistent antibiotic-resistant lung infections that cause chronic inflammation, and a decline in lung function. More than 50% of adults with CF are chronically colonized by Pseudomonas aeruginosa (P. aeruginosa), the primary reason for morbidity and mortality in people with CF (pwCF). Although highly effective modulator therapy (HEMT) is an important part of disease management in CF, HEMT does not eliminate P. aeruginosa or lung inflammation. Thus, new treatments are required to reduce lung infection and inflammation in CF. In a previous in vitro study, we demonstrated that primary human bronchial epithelial cells (HBECs) secrete extracellular vesicles (EVs) that block the ability of P. aeruginosa to form biofilms by reducing the abundance of several proteins necessary for biofilm formation as well as enhancing the sensitivity of P. aeruginosa to β-lactam antibiotics. In this study, using a CF mouse model of P. aeruginosa infection, we demonstrate that intratracheal administration of EVs secreted by HBEC reduced P. aeruginosa lung burden and several proinflammatory cytokines including IFN-γ, TNF-α, and MIP-1β in bronchoalveolar lavage fluid (BALF), even in the absence of antibiotics. Moreover, EVs decreased neutrophils in BALF. Thus, EVs secreted by HBEC reduce the lung burden of P. aeruginosa, decrease inflammation, and reduce neutrophils in a CF mouse model. These results suggest that HBEC via the secretion of EVs may play an important role in the immune response to P. aeruginosa lung infection.NEW & NOTEWORTHY Our findings show that extracellular vesicles secreted by primary human bronchial epithelial cells significantly reduce Pseudomonas aeruginosa burden, inflammation, and weight loss in a cystic fibrosis mouse model of infection.
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Affiliation(s)
- Sharanya Sarkar
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
| | - Roxanna Barnaby
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
| | - Amanda B Nymon
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
| | - Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Center for Biomedical Shared Resources, Larner College of Medicine, University of Vermont, Burlington, Vermont, United States
| | - Thomas J Kelley
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Bruce A Stanton
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, New Hampshire, United States
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7
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2024; 161:95-97. [PMID: 38265669 DOI: 10.1007/s00418-024-02266-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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8
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2024; 161:1-3. [PMID: 38193923 DOI: 10.1007/s00418-023-02260-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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9
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023; 160:491-493. [PMID: 38015267 DOI: 10.1007/s00418-023-02254-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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10
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Taatjes DJ, Koji T, Schrader M, Roth J. Editorial: Histochemistry and Cell Biology implements new submission guidelines for image presentation and image analysis. Histochem Cell Biol 2023; 160:495-497. [PMID: 37878055 DOI: 10.1007/s00418-023-02247-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Takehiko Koji
- Office for Research Initiative and Development, Nagasaki University, Nagasaki, 852-8521, Japan
| | - Michael Schrader
- Faculty of Health and Life Sciences, Biosciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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11
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023; 160:371-373. [PMID: 37904027 DOI: 10.1007/s00418-023-02246-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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12
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023; 160:277-278. [PMID: 37707641 DOI: 10.1007/s00418-023-02238-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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13
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Giepmans BNG, Taatjes DJ, Wolstencroft KJ. In focus: data management and data analysis in microscopy. Histochem Cell Biol 2023; 160:165-167. [PMID: 37646975 PMCID: PMC10492866 DOI: 10.1007/s00418-023-02226-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/14/2023] [Indexed: 09/01/2023]
Affiliation(s)
- Ben N G Giepmans
- Department of Biomedical Sciences of Cells and Systems, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA
| | - Katherine J Wolstencroft
- The Leiden Institute of Advanced Computer Science (LIACS), Leiden University, Leiden, The Netherlands
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14
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023:10.1007/s00418-023-02225-1. [PMID: 37477835 DOI: 10.1007/s00418-023-02225-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023:10.1007/s00418-023-02219-z. [PMID: 37368141 DOI: 10.1007/s00418-023-02219-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023:10.1007/s00418-023-02210-8. [PMID: 37266744 DOI: 10.1007/s00418-023-02210-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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Roth J, Taatjes DJ. Histochemistry and Cell Biology-a glance into the past and a look ahead. Histochem Cell Biol 2023; 159:465-475. [PMID: 37195292 PMCID: PMC10247834 DOI: 10.1007/s00418-023-02195-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2023] [Indexed: 05/18/2023]
Abstract
At the occasion of the 65th anniversary of Histochemistry and Cell Biology, we browse through its first ten years of publication and highlight a selection of papers from the early days of enzyme, protein, and carbohydrate histochemistry. In addition, we narrate recent progress to identify, quantify, and precisely determine the tissue localization of proteins and lipids, and small molecules by the combination of spectroscopic techniques and histology.
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Affiliation(s)
- Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland.
| | - Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA
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Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023; 159:309-311. [PMID: 36977938 DOI: 10.1007/s00418-023-02190-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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Meyn SM, Ramirez-Aguilar KA, Gregory CW, Mische S, Ott AW, Sol-Church K, Sturges M, Taatjes DJ. Addressing the Environmental Impact of Science Through a More Rigorous, Reproducible, and Sustainable Conduct of Research. Volume 33(4); 2022 Dec 2023; 33. [PMID: 37033093 PMCID: PMC10078834 DOI: 10.7171/3fc1f5fe.d085ce95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
The pervasiveness of irreproducible research remains a thorny problem for the progress of scientific endeavor, spawning an abundance of opinion, investigation, and proposals for improvement. Irreproducible research has negative consequences beyond the obvious impact on achieving new scientific discoveries that can advance healthcare and enable new technologies. The conduct of science is resource intensive, resulting in a large environmental impact from even the smallest research programs. There is value in making explicit connections between the conduct of more rigorous, reproducible science and commitments to environmental sustainability. Shared research resources (also commonly known as cores) often have an institutional role in supporting researchers in the responsible conduct of research through training, informal mentorship, and services and are particularly well suited to promulgating essential principles of scientific rigor, reproducibility, and transparency. Shared research resources can also play a role in advancing sustainability by virtue of their inherently efficient science model in which singular shared equipment, technology, and expertise resources can serve many different research programs. Programs that elevate shared research resources, scientific rigor, reproducibility, transparency, and environment sustainability in harmony may achieve a unique synergy. Several case studies and quality paradigms are discussed that offer tools and concepts that can be adapted whole or in part by individual shared research resources or research-intensive institutions as part of an overall program of sustainability.
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Affiliation(s)
- Susan M. Meyn
- Vanderbilt University Medical Center, Vanderbilt University, Nashville, Tennessee 37232, USA
| | | | | | - Sheenah Mische
- NYU Grossman School of Medicine, New York University, New York, New York 10016, USA
| | - Andrew W. Ott
- Northwestern University, Evanston, Illinois 60208, USA
| | - Katia Sol-Church
- University of Virginia School of Medicine, University of Virginia, Charlottesville, Virginia 22903, USA
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2023; 159:115-118. [PMID: 36740634 DOI: 10.1007/s00418-023-02179-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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22
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Affiliation(s)
- Douglas J. Taatjes
- grid.59062.380000 0004 1936 7689Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT 05405 USA
| | - Jürgen Roth
- grid.7400.30000 0004 1937 0650University of Zurich, CH-8091 Zurich, Switzerland
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23
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Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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Ott AW, Sol-Church K, Deshpande GM, Knudtson KL, Meyn SM, Mische SM, Taatjes DJ, Sturges MR, Gregory CW. Rigor, Reproducibility, and Transparency in Shared Research Resources: Follow-Up Survey and Recommendations for Improvements. J Biomol Tech 2022; 33:3fc1f5fe.fa789303. [PMID: 36910580 PMCID: PMC10001929 DOI: 10.7171/3fc1f5fe.fa789303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Rigor, reproducibility, and transparency (RR&T) are essential components of all scientific pursuits. Shared research resources, also known as core facilities, are on the frontlines of ensuring robust RR&T practices. The Association of Biomolecular Resource Facilities Committee on Core Rigor and Reproducibility conducted a follow-up survey 4 years after the initial 2017 survey to determine if core facilities have seen a positive impact of new RR&T initiatives (including guidance from the National Institutes of Health, new scientific journal requirements on transparency and data provenance, and educational tools from professional organizations). While there were fewer participants in the most recent survey, the respondents' opinions on the role of core facilities and level of best practices adoption remained the same. Overall, the respondents agreed that procedures should be implemented by core facilities to ensure scientific RR&T. They also indicated that there is a strong correlation between institutions that emphasize RR&T and core customers using this expertise in grant applications and publications. The survey also assessed the impact of the COVID-19 pandemic on core operations and RR&T. The answers to these pandemic-related questions revealed that many of the strategies aimed at increasing efficiencies are also best practices related to RR&T, including the development of standard operating procedures, supply chain management, and cross training. Given the consistent and compelling awareness of the importance of RR&T expressed by core directors in 2017 and 2021 contrasted with the lack of apparent improvements over this time period, the authors recommend an adoption of RR&T statements by all core laboratories. Adhering to the RR&T guidelines will result in more efficient training, better compliance, and improved experimental approaches empowering cores to become "rigor champions."
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Affiliation(s)
- Andrew W Ott
- Northwestern University EvanstonIllinois60208 USA
| | | | | | | | - Susan M Meyn
- Vanderbilt University Medical Center NashvilleTennessee37232 USA
| | - Sheenah M Mische
- New York University Langone Medical Center New YorkNew York10016 USA
| | - Douglas J Taatjes
- Larner College of Medicine University of Vermont BurlingtonVermont05405 USA
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25
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2022; 158:123-125. [PMID: 35859014 DOI: 10.1007/s00418-022-02142-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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26
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2022; 158:1-4. [PMID: 35751678 DOI: 10.1007/s00418-022-02125-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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27
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Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2022; 157:493-495. [PMID: 35513613 DOI: 10.1007/s00418-022-02108-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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29
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Taatjes DJ, Ghule PN, Bouffard NA, Lee K, DeLance NM, Evans MF, Weaver DL, Deakin N, Carr FE, Sprague BL, Stein GS, Stein JL. The Shared Core Resource as a Partner in Innovative Scientific Research: Illustration from an Academic Microscopy Imaging Center. J Biomol Tech 2022; 33:3fc1f5fe.2507f36c. [PMID: 35836997 PMCID: PMC9258914 DOI: 10.7171/3fc1f5fe.2507f36c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Core facilities have a ubiquitous and increasingly valuable presence at research institutions. Although many shared cores were originally created to provide routine services and access to complex and expensive instrumentation for the research community, they are frequently called upon by investigators to design protocols and procedures to help answer complex research questions. For instance, shared microscopy resources are evolving from providing access to and training on complex imaging instruments to developing detailed innovative protocols and experimental strategies, including sample preparation techniques, staining, complex imaging parameters, and high-level image analyses. These approaches require close intellectual collaboration between core staff and research investigators to formulate and coordinate plans for protocol development suited to the research question. Herein, we provide an example of such coordinated collaboration between a shared microscopy facility and a team of scientists and clinician-investigators to approach a complex multiprobe immunostaining, imaging, and image analysis project investigating the tumor microenvironment from human breast cancer samples. Our hope is that this example may be used to convey to institute administrators the critical importance of the intellectual contributions of the scientific staff in core facilities to research endeavors.
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Affiliation(s)
- Douglas J. Taatjes
- Department of Pathology and Laboratory Medicine,
Microscopy Imaging Center, and University of Vermont Cancer Center, University of VermontBurlington, VT 05405USA
| | - Prachi N. Ghule
- University of Vermont Cancer Center and Department of Biochemistry,
University of VermontBurlington,
VT 05405USA
| | - Nicole A. Bouffard
- Department of Pathology and Laboratory Medicine and Microscopy Imaging Center,
University of VermontBurlington,
VT 05405USA
| | - Kyra Lee
- Department of Biochemistry,
University of VermontBurlington,
VT 05405USA
| | - Nicole M. DeLance
- Department of Pathology and Laboratory Medicine and Microscopy Imaging Center,
University of VermontBurlington,
VT 05405USA
| | - Mark F. Evans
- Department of Pathology and Laboratory Medicine and University of Vermont Cancer Center,
University of VermontBurlington,
VT 05405USA
| | - Donald L. Weaver
- Department of Pathology and Laboratory Medicine and University of Vermont Cancer Center,
University of VermontBurlington,
VT 05405USA
| | | | - Frances E. Carr
- University of Vermont Cancer Center and Department of Pharmacology,
University of VermontBurlington,
VT 05405USA
| | - Brian L. Sprague
- University of Vermont Cancer Center and Department of Surgery,
Larner College of Medicine, University of VermontBurlington,
VT 05405USA
| | - Gary S. Stein
- University of Vermont Cancer Center and Department of Biochemistry,
University of VermontBurlington,
VT 05405USA
| | - Janet L. Stein
- University of Vermont Cancer Center and Department of Biochemistry,
University of VermontBurlington,
VT 05405USA
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30
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2022; 157:123-126. [PMID: 35122121 DOI: 10.1007/s00418-022-02075-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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31
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 156:519-522. [PMID: 34854973 DOI: 10.1007/s00418-021-02050-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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32
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 156:297-299. [PMID: 34626215 DOI: 10.1007/s00418-021-02035-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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33
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Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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34
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 154:347-354. [PMID: 32984928 DOI: 10.1007/s00418-020-01921-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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35
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 154:1-5. [PMID: 32601749 DOI: 10.1007/s00418-020-01893-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 156:1-4. [PMID: 34235551 DOI: 10.1007/s00418-021-02003-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2021] [Indexed: 10/20/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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Manuel AM, van de Wetering C, MacPherson M, Erickson C, Murray C, Aboushousha R, van der Velden J, Dixon AE, Poynter ME, Irvin CG, Taatjes DJ, van der Vliet A, Anathy V, Janssen-Heininger YMW. Dysregulation of Pyruvate Kinase M2 Promotes Inflammation in a Mouse Model of Obese Allergic Asthma. Am J Respir Cell Mol Biol 2021; 64:709-721. [PMID: 33662229 PMCID: PMC8456891 DOI: 10.1165/rcmb.2020-0512oc] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 02/07/2021] [Indexed: 01/17/2023] Open
Abstract
Obesity is a risk factor for the development of asthma and represents a difficult-to-treat disease phenotype. Aerobic glycolysis is emerging as a key feature of asthma, and changes in glucose metabolism are linked to leukocyte activation and adaptation to oxidative stress. Dysregulation of PKM2 (pyruvate kinase M2), the enzyme that catalyzes the last step of glycolysis, contributes to house dust mite (HDM)-induced airway inflammation and remodeling in lean mice. It remains unclear whether glycolytic reprogramming and dysregulation of PKM2 also contribute to obese asthma. The goal of the present study was to elucidate the functional role of PKM2 in a murine model of obese allergic asthma. We evaluated the small molecule activator of PKM2, TEPP46, and assessed the role of PKM2 using conditional ablation of the Pkm2 allele from airway epithelial cells. In obese C57BL/6NJ mice, parameters indicative of glycolytic reprogramming remained unchanged in the absence of stimulation with HDM. Obese mice that were subjected to HDM showed evidence of glycolytic reprogramming, and treatment with TEPP46 diminished airway inflammation, whereas parameters of airway remodeling were unaffected. Epithelial ablation of Pkm2 decreased central airway resistance in both lean and obese allergic mice in addition to decreasing inflammatory cytokines in the lung tissue. Lastly, we highlight a novel role for PKM2 in the regulation of glutathione-dependent protein oxidation in the lung tissue of obese allergic mice via a putative IFN-γ-glutaredoxin1 pathway. Overall, targeting metabolism and protein oxidation may be a novel treatment strategy for obese allergic asthma.
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Affiliation(s)
| | | | | | - Cuixia Erickson
- Department of Pathology and Department of Laboratory Medicine, and
| | - Caliann Murray
- Department of Pathology and Department of Laboratory Medicine, and
| | - Reem Aboushousha
- Department of Pathology and Department of Laboratory Medicine, and
| | | | - Anne E. Dixon
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Matthew E. Poynter
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Charles G. Irvin
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | | | | | - Vikas Anathy
- Department of Pathology and Department of Laboratory Medicine, and
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 155:319-322. [PMID: 33774757 DOI: 10.1007/s00418-021-01976-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2021] [Indexed: 10/21/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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39
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 155:1-8. [PMID: 33469707 DOI: 10.1007/s00418-020-01958-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2020] [Indexed: 10/22/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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40
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Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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41
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2020; 154:597-607. [PMID: 33277679 DOI: 10.1007/s00418-020-01944-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2020] [Indexed: 11/26/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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42
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2020; 153:193-197. [PMID: 32246200 DOI: 10.1007/s00418-020-01870-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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43
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Abdallah H, Formosa B, Liyanaarachchi A, Saigh M, Silvers S, Arslanturk S, Taatjes DJ, Larsson L, Jena BP, Gatti DL. Res-CR-Net, a residual network with a novel architecture optimized for the semantic segmentation of microscopy images. Mach Learn : Sci Technol 2020. [DOI: 10.1088/2632-2153/aba8e8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Deep neural networks (DNN) have been widely used to carry out segmentation tasks in both electron microscopy (EM) and light/fluorescence microscopy (LM/FM). Most DNNs developed for this purpose are based on some variation of the encoder-decoder U-Net architecture. Here we show how Res-CR-Net, a new type of fully convolutional neural network that does not adopt a U-Net architecture, excels at segmentation tasks traditionally considered very hard, like recognizing the contours of nuclei, cytoplasm and mitochondria in densely packed cells in either EM or LM/FM images.
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Butnor KJ, Covington J, Taatjes DJ, DeWitt J, Von Turkovich MA. Fluorine detection in the lung tissue of a worker with interstitial pulmonary fibrosis and long-term occupational exposure to polytetrafluoroethylene and perfluorooctanoic acid. Ultrastruct Pathol 2020; 44:496-500. [PMID: 33200662 DOI: 10.1080/01913123.2020.1842828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Exposure to polytetrafluoroethylene (PTFE), a compound used in nonstick cookware coating and a variety of other applications, is known to cause acute lung injury and granulomatous pneumonitis. It is uncertain whether PTFE and compounds used in its manufacture, such as perfluorooctanoic acid (PFOA), cause chronic lung disease. Here we report a case of interstitial pulmonary fibrosis in a 71-year-old man who died following a brief illness clinically suspected to be acute respiratory distress syndrome. He had a 25-year history of occupational exposure to PTFE and PFOA. At postmortem examination, the lungs demonstrated diffuse alveolar damage (DAD) superimposed on interstitial pulmonary fibrosis. The interstitial fibrosis lacked fibroblast foci and exhibited basilar and subpleural accentuation with focal microscopic honeycombing. Within the fibrotic lung parenchyma were scattered giant cells containing birefringent translucent particles. Scanning electron microscopy and energy-dispersive x-ray spectroscopy (SEM-EDS) were performed. A majority of the birefringent particles demonstrated a prominent peak for fluorine by EDS analysis. This is the first report to document the presence of fluorine, an elemental constituent of PTFE and PFOA, in fibrotic lung tissue. Careful evaluation of other individuals with long-term exposure to PTFE and/or PFOA appears warranted to better elucidate the spectrum of pulmonary disease associated with these compounds.
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Affiliation(s)
- Kelly J Butnor
- Department of Pathology and Laboratory Medicinw, University of Vermont Medical Center , Burlington, VT, USA
| | - Jeffrey Covington
- Department of Pathology and Laboratory Medicinw, University of Vermont Medical Center , Burlington, VT, USA
| | - Douglas J Taatjes
- Department of Pathology, University of Vermont , Burlington, VT, USA
| | - John DeWitt
- Department of Pathology and Laboratory Medicinw, University of Vermont Medical Center , Burlington, VT, USA
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45
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2020; 153:129-133. [PMID: 32114634 DOI: 10.1007/s00418-020-01852-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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46
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Chia SB, Nolin JD, Aboushousha R, Erikson C, Irvin CG, Poynter ME, van der Velden J, Taatjes DJ, van der Vliet A, Anathy V, Janssen-Heininger YMW. Glutaredoxin deficiency promotes activation of the transforming growth factor beta pathway in airway epithelial cells, in association with fibrotic airway remodeling. Redox Biol 2020; 37:101720. [PMID: 32971362 PMCID: PMC7509797 DOI: 10.1016/j.redox.2020.101720] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 09/02/2020] [Accepted: 09/11/2020] [Indexed: 12/14/2022] Open
Abstract
S-glutathionylation of reactive protein cysteines is a post-translational event that plays a critical role in transducing signals from oxidants into biological responses. S-glutathionylation can be reversed by the deglutathionylating enzyme glutaredoxin (GLRX). We have previously demonstrated that ablation of Glrx sensitizes mice to the development of parenchymal lung fibrosis(1). It remains unclear whether GLRX also controls airway fibrosis, a clinical feature relevant to asthma and chronic obstructive pulmonary disease, and whether GLRX controls the biology of airway epithelial cells, which have been implicated in the pathophysiology of these diseases. In the present study we utilized a house dust mite (HDM) model of allergic airway disease in wild type (WT) and Glrx-/- mice on a C57BL/6 background prone to develop airway fibrosis, and tracheal basal stem cells derived from WT mice, global Glrx-/- mice, or bi-transgenic mice allowing conditional ablation of the Glrx gene. Herein we show that absence of Glrx led to enhanced HDM-induced collagen deposition, elevated levels of transforming growth factor beta 1 (TGFB1) in the bronchoalveolar lavage, and resulted in increases in airway hyperresponsiveness. Airway epithelial cells isolated from Glrx-/- mice or following conditional ablation of Glrx showed spontaneous increases in secretion of TGFB1. Glrx-/- basal cells also showed spontaneous TGFB pathway activation, in association with increased expression of mesenchymal genes, including collagen 1a1 and fibronectin. Overall, these findings suggest that GLRX regulates airway fibrosis via a mechanism(s) that involve the plasticity of basal cells, the stem cells of the airways.
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Affiliation(s)
- Shi B Chia
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - James D Nolin
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA; Center for Genes, Environment and Health, National Jewish Health, Denver, CO, 80206, USA
| | - Reem Aboushousha
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Cuixia Erikson
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Charles G Irvin
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Matthew E Poynter
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Jos van der Velden
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Albert van der Vliet
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Vikas Anathy
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA
| | - Yvonne M W Janssen-Heininger
- Department of Pathology and Laboratory Medicine, University of Vermont College of Medicine, Burlington, VT, 05405, USA.
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47
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2020; 153:1-3. [PMID: 31897604 DOI: 10.1007/s00418-019-01840-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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48
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Greenfield SR, Tighe SW, Bai Y, Goerlitz DS, Von Turkovich M, Taatjes DJ, Dragon JA, Johnson SS. Life and its traces in Antarctica's McMurdo Dry Valley paleolakes: a survey of preservation. Micron 2019; 131:102818. [PMID: 31968300 DOI: 10.1016/j.micron.2019.102818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 12/24/2019] [Indexed: 01/21/2023]
Abstract
The extremely cold and arid conditions of Antarctica make it uniquely positioned to investigate fundamental questions regarding the persistence of life in extreme environments. Within the McMurdo Dry Valleys and surrounding mountain ranges are multiple ancient relict lakes, paleolakes, with lacustrine deposits spanning from thousands to millions of years in age. Here we present data from light microscopy, scanning electron microscopy, electron dispersive x-ray spectroscopy, and radiocarbon dating to catalog the remarkable range of life preserved within these deposits. This includes intact microbes and nanobacteria-sized cocci, CaCO3 precipitations consistent with biogenic calcium, previously undescribed net-like structures, possible dormant spores, and long-extinct yet exquisitely preserved non-vascular plants. These images provide an important reference for further microbiome investigations of Antarctic paleolake samples. In addition, these findings may provide a visual reference for the use of subsurface groundwater microbial communities as an analog for paleolake subsurface water on planets such as Mars.
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Affiliation(s)
| | - Scott W Tighe
- Vermont Integrative Genomics, University of Vermont, Burlington, VT, 05405 USA
| | - Yu Bai
- Department of Biology, Georgetown University, Washington DC 20057 USA
| | - David S Goerlitz
- Georgetown University Medical Center, Georgetown University, Washington DC, 20057 USA
| | - Michele Von Turkovich
- Department of Pathology and Laboratory Medicine, USA; Microscopy Imaging Center, Larner College of Medicine, University of Vermont, Burlington, VT 05405 USA
| | - Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, USA; Microscopy Imaging Center, Larner College of Medicine, University of Vermont, Burlington, VT 05405 USA
| | - Julie A Dragon
- Vermont Integrative Genomics, University of Vermont, Burlington, VT, 05405 USA; Department of Microbiology and Molecular Genetics, Larner College of Medicine, University of Vermont, Burlington, VT, 05405 USA
| | - Sarah Stewart Johnson
- Department of Biology, Georgetown University, Washington DC 20057 USA; Science, Technology, and International Affairs Program, Georgetown University, Washington DC, 20057 USA
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50
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Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, 8091, Zurich, Switzerland
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