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Boahen A, Hu D, Adams MJ, Nicholls PK, Greene WK, Ma B. Bidirectional crosstalk between the peripheral nervous system and lymphoid tissues/organs. Front Immunol 2023; 14:1254054. [PMID: 37767094 PMCID: PMC10520967 DOI: 10.3389/fimmu.2023.1254054] [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: 07/06/2023] [Accepted: 08/25/2023] [Indexed: 09/29/2023] Open
Abstract
The central nervous system (CNS) influences the immune system generally by regulating the systemic concentration of humoral substances (e.g., cortisol and epinephrine), whereas the peripheral nervous system (PNS) communicates specifically with the immune system according to local interactions/connections. An imbalance between the components of the PNS might contribute to pathogenesis and the further development of certain diseases. In this review, we have explored the "thread" (hardwiring) of the connections between the immune system (e.g., primary/secondary/tertiary lymphoid tissues/organs) and PNS (e.g., sensory, sympathetic, parasympathetic, and enteric nervous systems (ENS)) in health and disease in vitro and in vivo. Neuroimmune cell units provide an anatomical and physiological basis for bidirectional crosstalk between the PNS and the immune system in peripheral tissues, including lymphoid tissues and organs. These neuroimmune interactions/modulation studies might greatly contribute to a better understanding of the mechanisms through which the PNS possibly affects cellular and humoral-mediated immune responses or vice versa in health and diseases. Physical, chemical, pharmacological, and other manipulations of these neuroimmune interactions should bring about the development of practical therapeutic applications for certain neurological, neuroimmunological, infectious, inflammatory, and immunological disorders/diseases.
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Affiliation(s)
- Angela Boahen
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Seri-Kembangan, Selangor, Malaysia
| | - Dailun Hu
- Department of Pathogenic Biology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Murray J. Adams
- School of Medical, Molecular and Forensic Sciences, Murdoch University, Murdoch, WA, Australia
| | - Philip K. Nicholls
- School of Medical, Molecular and Forensic Sciences, Murdoch University, Murdoch, WA, Australia
| | - Wayne K. Greene
- School of Medical, Molecular and Forensic Sciences, Murdoch University, Murdoch, WA, Australia
| | - Bin Ma
- School of Medical, Molecular and Forensic Sciences, Murdoch University, Murdoch, WA, Australia
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Menges AL, Nackenhorst M, Müller JR, Engl ML, Hegenloh R, Pelisek J, Geibelt E, Hofmann A, Reeps C, Biro G, Eckstein HH, Zimmermann A, Magee D, Falk M, Sachs N, Busch A. Completing the view - histologic insights from circular AAA specimen including 3D imaging : A methodologic approach towards histologic analysis of circumferential AAA samples. Diagn Pathol 2023; 18:73. [PMID: 37308870 PMCID: PMC10259026 DOI: 10.1186/s13000-023-01359-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 05/23/2023] [Indexed: 06/14/2023] Open
Abstract
Abdominal aortic aneurysm (AAA) is a pathologic enlargement of the infrarenal aorta with an associated risk of rupture. However, the responsible mechanisms are only partially understood. Based on murine and human samples, a heterogeneous distribution of characteristic pathologic features across the aneurysm circumference is expected. Yet, complete histologic workup of the aneurysm sac is scarcely reported. Here, samples from five AAAs covering the complete circumference partially as aortic rings are investigated by histologic means (HE, EvG, immunohistochemistry) and a new method embedding the complete ring. Additionally, two different methods of serial histologic section alignment are applied to create a 3D view. The typical histopathologic features of AAA, elastic fiber degradation, matrix remodeling with collagen deposition, calcification, inflammatory cell infiltration and thrombus coverage were distributed without recognizable pattern across the aneurysm sac in all five patients. Analysis of digitally scanned entire aortic rings facilitates the visualization of these observations. Immunohistochemistry is feasible in such specimen, however, tricky due to tissue disintegration. 3D image stacks were created using open-source and non-generic software correcting for non-rigid warping between consecutive sections. Secondly, 3D image viewers allowed visualization of in-depth changes of the investigated pathologic hallmarks. In conclusion, this exploratory descriptive study demonstrates a heterogeneous histomorphology around the AAA circumference. Warranting an increased sample size, these results might need to be considered in future mechanistic research, especially in reference to intraluminal thrombus coverage. 3D histology of such circular specimen could be a valuable visualization tool for further analysis.
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Affiliation(s)
- Anna-Leonie Menges
- Department for Vascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Maja Nackenhorst
- Department of Pathology, Medical University of Vienna, Vienna, Austria
| | - Johannes R Müller
- DFG Cluster of Excellence "Physics of Life", TU Dresden, Dresden, Germany
| | - Marie-Luise Engl
- Technical University Munich, Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Munich, Germany
| | - Renate Hegenloh
- Technical University Munich, Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Munich, Germany
| | - Jaroslav Pelisek
- Department for Vascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Ellen Geibelt
- Light Microscopy Facility, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, Germany
| | - Anja Hofmann
- Department for Visceral-, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Fetscherstrasse 74, Dresden, Germany
| | - Christian Reeps
- Department for Visceral-, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Fetscherstrasse 74, Dresden, Germany
| | - Gabor Biro
- Technical University Munich, Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Munich, Germany
| | - Hans-Henning Eckstein
- Technical University Munich, Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Munich, Germany
- German Center for Cardiovascular Research (DZHK), Munich Heart Alliance, Berlin, Germany
| | - Alexander Zimmermann
- Department for Vascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Derek Magee
- HeteroGenius Limited, Leeds, UK
- School of Computing, University of Leeds, Leeds, UK
| | - Martin Falk
- Scientific Visualization Group, Department of Science and Technology (ITN), Linköping University, Linköping, Sweden
| | - Nadja Sachs
- Technical University Munich, Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Munich, Germany
- German Center for Cardiovascular Research (DZHK), Munich Heart Alliance, Berlin, Germany
| | - Albert Busch
- Technical University Munich, Department for Vascular and Endovascular Surgery, Klinikum Rechts der Isar, Munich, Germany.
- Department for Visceral-, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Fetscherstrasse 74, Dresden, Germany.
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Microstructure and mechanics of the bovine trachea: Layer specific investigations through SHG imaging and biaxial testing. J Mech Behav Biomed Mater 2022; 134:105371. [PMID: 35868065 DOI: 10.1016/j.jmbbm.2022.105371] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/20/2022] [Accepted: 07/09/2022] [Indexed: 11/22/2022]
Abstract
The trachea is a complex tissue made up of hyaline cartilage, fibrous tissue, and muscle fibers. Currently, the knowledge of microscopic structural organization of these components and their role in determining the tissue's mechanical response is very limited. The purpose of this study is to provide data on the microstructure of the tracheal components and its influence on tissue's mechanical response. Five bovine tracheae were used in this study. Adventitia, cartilage, mucosa/submucosa, and trachealis muscle layers were methodically cut out from the whole tissue. Second-harmonic generation(SHG) via multi-photon microscopy (MPM) enabled imaging of collagen fibers and muscle fibers. Simultaneously, a planar biaxial test rig was used to record the mechanical behavior of each layer. In total 60 samples were tested and analyzed. Fiber architecture in the adventitia and mucosa/submucosa layer showed high degree of anisotropy with the mean fiber angle varying from sample to sample. The trachealis muscle displayed neat layers of fibers organized in the longitudinal direction. The cartilage also displayed a structure of thick mesh-work of collagen type II organized predominantly towards the circumferential direction. Further, mechanical testing demonstrated the anisotropic nature of the tissue components. The cartilage was identified as the stiffest component for strain level < 20% and hence the primary load bearing component. The other three layers displayed a non-linear mechanical response which could be explained by the structure and organization of their fibers. This study is useful in enhancing the utilization of structurally motivated material models for predicting tracheal overall mechanical response.
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Sun Q, Tiziana P, Khan AUM, Heuveline V, Gretz N. A simple optical tissue clearing pipeline for 3D vasculature imaging of the mediastinal organs in mice. Int J Exp Pathol 2021; 102:218-227. [PMID: 34613652 DOI: 10.1111/iep.12399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 03/23/2021] [Accepted: 04/06/2021] [Indexed: 12/23/2022] Open
Abstract
Optical tissue clearing (OTC) methods render tissue transparent by matching the refractive index within a sample to enable three-dimensional (3D) imaging with advanced microscopes. The application of OTC method in mediastinal organs in mice remains poorly understand. Our aim was to establish a simple protocol pipeline for 3D imaging of the mediastinal organs in mice. Trachea, oesophagus, thymus and heart were harvested from mice after retrograde perfusion via the abdominal aorta. We combined and optimized antibody labelling of thick tissue samples, OTC with cheap and non-toxic solvent ethyl cinnamate (ECi), and light-sheet fluorescence microscopy (LSFM) or laser confocal fluorescence microscopy (LCFM) to visualize the vasculature of those tissues. A high degree of optical transparency of trachea, oesophagus, thymus and heart was achieved after ECi-based OTC. With anti-CD31 antibody immunofluorescence labelling before ECi-based OTC, the vasculature of these tissues with their natural morphology, location and organizational network was imaged using LSFM or LCFM. This simple protocol pipeline provides an easy-to-setup and comprehensive way to study the vasculature of mediastinal organs in 3D without any special equipment. We anticipate that it will facilitate diverse applications in biomedical research of thoracic diseases and even other organs.
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Affiliation(s)
- Quanchao Sun
- Department of Thoracic Surgery, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg and University of Applied Sciences, Mannheim, Germany
| | - Picascia Tiziana
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg and University of Applied Sciences, Mannheim, Germany
| | - Arif Ul Maula Khan
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg and University of Applied Sciences, Mannheim, Germany
| | - Vincent Heuveline
- Director of the Computing Centre, Heidelberg University, Heidelberg, Germany
| | - Norbert Gretz
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg and University of Applied Sciences, Mannheim, Germany
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