The demonstration, by immunofluorescence, of Legionella pneumophila organisms in human lung tissue embedded in epoxy resin

1981 ◽  
Vol 71 (4) ◽  
pp. 581-584 ◽  
Author(s):  
A. R. Skinner ◽  
A. Swann
Keyword(s):  
Epoxy Resin ◽  
Lung Tissue ◽  
Legionella Pneumophila ◽  
Human Lung ◽  
Human Lung Tissue

scholarly journals Human Lung Tissue Explants Reveal Novel Interactions during Legionella pneumophila Infections

2013 ◽  
Vol 82 (1) ◽  
pp. 275-285 ◽  
Author(s):  
Jens Jäger ◽  
Sebastian Marwitz ◽  
Jana Tiefenau ◽  
Janine Rasch ◽  
Olga Shevchuk ◽  
...  
Keyword(s):  
Lung Tissue ◽  
Legionella Pneumophila ◽  
Human Lung ◽  
Transcriptional Response ◽  
Human Infection ◽  
Bacterial Invasion ◽  
Human Lung Tissue ◽  
Content Type ◽  
Tissue Explants ◽  
Legionnaires Disease

ABSTRACTHistological and clinical investigations describe late stages of Legionnaires' disease but cannot characterize early events of human infection. Cellular or rodent infection models lack the complexity of tissue or have nonhuman backgrounds. Therefore, we developed and applied a novel model forLegionella pneumophilainfection comprising living human lung tissue. We stimulated lung explants withL. pneumophilastrains and outer membrane vesicles (OMVs) to analyze tissue damage, bacterial replication, and localization as well as the transcriptional response of infected tissue. Interestingly, we found that extracellular adhesion ofL. pneumophilato the entire alveolar lining precedes bacterial invasion and replication in recruited macrophages. In contrast, OMVs predominantly bound to alveolar macrophages. Specific damage to septa and epithelia increased over 48 h and was stronger in wild-type-infected and OMV-treated samples than in samples infected with the replication-deficient, type IVB secretion-deficient DotA−strain. Transcriptome analysis of lung tissue explants revealed a differential regulation of 2,499 genes after infection. The transcriptional response included the upregulation of uteroglobin and the downregulation of the macrophage receptor with collagenous structure (MARCO). Immunohistochemistry confirmed the downregulation of MARCO at sites of pathogen-induced tissue destruction. Neither host factor has ever been described in the context ofL. pneumophilainfections. This work demonstrates that the tissue explant model reproduces realistic features of Legionnaires' disease and reveals new functions for bacterial OMVs during infection. Our model allows us to characterize early steps of human infection which otherwise are not feasible for investigations.

Mast Cell Heterogeneity in Human Lung Tissue

1989 ◽  
Vol 77 (3) ◽  
pp. 297-304 ◽  
Author(s):  
F. J. Van Overveld ◽  
L. A. M. J. Houben ◽  
F. E. M. Schmitz du Moulin ◽  
P. L. B. Bruijnzeel ◽  
J. A. M. Raaijmakers ◽  
...  
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Alcian Blue ◽  
Lung Tissue ◽  
Human Lung ◽  
Immunoglobulin E ◽  
Prostaglandin D2 ◽  
Leukotriene C4 ◽  
Human Lung Tissue ◽  
No Release

1. In this study mast cells were found to comprise 2.1% of total cells recovered by enzymatic digestion of human lung tissue. 2. This mast cell population consisted of 79% formalin-sensitive, Alcian Blue-positive mast cells and 21% formalin-insensitive, Alcian Blue-positive mast cells. 3. By the use of centrifugal elutriation and subsequent Percoll gradient centrifugation, separate mixed cell populations could be obtained in which the mast cell constituents were either of the formalin-sensitive or -insensitive type. 4. Cell suspensions in which formalin-sensitive cells comprised 97% of mast cells contained approximately 1.34 pg of histamine per mast cell, whereas in preparations in which mast cells were 84% formalin-resistant the histamine content was approximately 4.17 pg of histamine per mast cell. 5. The histamine release upon anti-immunoglobulin E challenge of formalin-sensitive mast cells was greater than the release by formalin-insensitive mast cells. 6. After challenge with opsonized zymosan, only formalin-sensitive mast cells were able to release histamine. 7. Leukotriene C4 release was observed when formalin-sensitive mast cells were challenged with antiimmunoglobulin E. Formalin-insensitive mast cells showed no release of leukotriene C4. 8. Prostaglandin D2 release was observed when formalin-insensitive mast cells were challenged with antiimmunoglobulin E. Formalin-sensitive mast cells showed no release of prostaglandin D2.

The Glucocorticosteroid, Budesonide, Partially Blocks Histamine Release from Human Lung Tissue in Vitro

Allergy ◽  
1986 ◽  
Vol 41 (5) ◽  
pp. 319-326 ◽  
Author(s):  
H. Bergstrand ◽  
B. Lundquist ◽  
B.-Å. Petersson
Keyword(s):  
Histamine Release ◽  
Lung Tissue ◽  
Human Lung ◽  
Human Lung Tissue

Preparation of Single Cell Suspension from Human Lung Tissue v1

2021 ◽  
Author(s):  
Steven B. Wells ◽  
Peter A. Szabo ◽  
Basak Ural ◽  
Maya M.L. Poon
Keyword(s):  
Epithelial Cells ◽  
Cell Suspension ◽  
Single Cell ◽  
Lung Tissue ◽  
Immune Cells ◽  
Human Lung ◽  
Dilution Factor ◽  
Single Cell Suspension ◽  
Human Lung Tissue ◽  
Defined Media

This protocol describes a method for the isolation of the immune cells, structural and epithelial cells, and progenitors from human lung sections of about two grams. By providing defined media formulations, volumes at each step, and a defined dilution factor for density centrifugation, it yields consistent single-cell suspensions across samples.

Inhibition of ferrous-induced lipid peroxidation by dipyridamole, RA-642 and mopidamol in human lung tissue

1996 ◽  
Vol 27 (5) ◽  
pp. 855-859 ◽  
Author(s):  
J.P. De la Cruz ◽  
C. Olveira ◽  
J.A. Gonzalez-Correa ◽  
A. Benítez ◽  
F. Sánchez de la Cuesta
Keyword(s):  
Lipid Peroxidation ◽  
Lung Tissue ◽  
Human Lung ◽  
Human Lung Tissue

scholarly journals Immunofluorescence-guided segmentation of three-dimensional features in micro-computed tomography datasets of human lung tissue

2021 ◽  
Vol 8 (11) ◽  
Author(s):  
Matthew J. Lawson ◽  
Orestis L. Katsamenis ◽  
David Chatelet ◽  
Aiman Alzetani ◽  
Oliver Larkin ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Lung Tissue ◽  
Human Lung ◽  
Three Dimensional ◽  
Micro Computed Tomography ◽  
3D Segmentation ◽  
Human Lung Tissue ◽  
Formalin Fixed Paraffin ◽  
Formalin Fixed Paraffin Embedded ◽  
Formalin Fixed

Micro-computed tomography (µCT) provides non-destructive three-dimensional (3D) imaging of soft tissue microstructures. Specific features in µCT images can be identified using correlated two-dimensional (2D) histology images allowing manual segmentation. However, this is very time-consuming and requires specialist knowledge of the tissue and imaging modalities involved. Using a custom-designed µCT system optimized for imaging unstained formalin-fixed paraffin-embedded soft tissues, we imaged human lung tissue at isotropic voxel sizes less than 10 µm. Tissue sections were stained with haematoxylin and eosin or cytokeratin 18 in columnar airway epithelial cells using immunofluorescence (IF), as an exemplar of this workflow. Novel utilization of tissue autofluorescence allowed automatic alignment of 2D microscopy images to the 3D µCT data using scripted co-registration and automated image warping algorithms. Warped IF images, which were accurately aligned with the µCT datasets, allowed 3D segmentation of immunoreactive tissue microstructures in the human lung. Blood vessels were segmented semi-automatically using the co-registered µCT datasets. Correlating 2D IF and 3D µCT data enables accurate identification, localization and segmentation of features in fixed soft lung tissue. Our novel correlative imaging workflow provides faster and more automated 3D segmentation of µCT datasets. This is applicable to the huge range of formalin-fixed paraffin-embedded tissues held in biobanks and archives.

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