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Roballo KCS, Gigley JP, Smith TA, Bittner GD, Bushman JS. Functional and immunological peculiarities of peripheral nerve allografts. Neural Regen Res 2021; 17:721-727. [PMID: 34472457 PMCID: PMC8530136 DOI: 10.4103/1673-5374.322445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This review addresses the accumulating evidence that live (not decellularized) allogeneic peripheral nerves are functionally and immunologically peculiar in comparison with many other transplanted allogeneic tissues. This is relevant because live peripheral nerve allografts are very effective at promoting recovery after segmental peripheral nerve injury via axonal regeneration and axon fusion. Understanding the immunological peculiarities of peripheral nerve allografts may also be of interest to the field of transplantation in general. Three topics are addressed: The first discusses peripheral nerve injury and the potential utility of peripheral nerve allografts for bridging segmental peripheral nerve defects via axon fusion and axon regeneration. The second reviews evidence that peripheral nerve allografts elicit a more gradual and less severe host immune response allowing for prolonged survival and function of allogeneic peripheral nerve cells and structures. Lastly, potential mechanisms that may account for the immunological differences of peripheral nerve allografts are discussed.
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Affiliation(s)
| | - Jason P Gigley
- Department of Molecular Biology, University of Wyoming, Laramie, WY, USA
| | - Tyler A Smith
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, USA
| | - George D Bittner
- Department of Neuroscience, University of Texas at Austin, Austin, TX, USA
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Rolfes L, Schulte-Mecklenbeck A, Schreiber S, Vielhaber S, Herty M, Marten A, Pfeuffer S, Ruck T, Wiendl H, Gross CC, Meuth SG, Boentert M, Pawlitzki M. Amyotrophic lateral sclerosis patients show increased peripheral and intrathecal T-cell activation. Brain Commun 2021; 3:fcab157. [PMID: 34405141 PMCID: PMC8363480 DOI: 10.1093/braincomms/fcab157] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2021] [Indexed: 11/30/2022] Open
Abstract
Several studies suggest a role for the peripheral immune system in the pathophysiology of amyotrophic lateral sclerosis. However, comprehensive studies investigating the intrathecal immune system in amyotrophic lateral sclerosis are rare. To elucidate whether compartment-specific inflammation contributes to amyotrophic lateral sclerosis pathophysiology, we here investigated intrathecal and peripheral immune profiles in amyotrophic lateral sclerosis patients and compared them with controls free of neurological disorders (controls) and patients with dementia or primary progressive multiple sclerosis. Routine CSF parameters were examined in 308 patients, including 132 amyotrophic lateral sclerosis patients. In a subgroup of 41 amyotrophic lateral sclerosis patients, extensive flow-cytometric immune cell profiling in peripheral blood and CSF was performed and compared with data from 26 controls, 25 dementia and 21 multiple sclerosis patients. Amyotrophic lateral sclerosis patients presented with significantly altered proportions of monocyte subsets in peripheral blood and increased frequencies of CD4+ and CD8+ T cells expressing the activation marker HLA-DR in peripheral blood (CD8+) and CSF (CD4+ and CD8+) compared with controls. While dementia and multiple sclerosis patients exhibited a comparable increase in intrathecal CD8+ T-cell activation, CD8+ T-cell activation in the peripheral blood in amyotrophic lateral sclerosis was higher than in multiple sclerosis patients. Furthermore, intrathecal CD4+ T-cell activation in amyotrophic lateral sclerosis surpassed levels in dementia patients. Intrathecal T-cell activation resulted from in situ activation rather than transmigration of activated T cells from the blood. While T-cell activation did not correlate with amyotrophic lateral sclerosis progression, patients with rapid disease progression showed reduced intrathecal levels of immune-regulatory CD56bright natural killer cells. The integration of these parameters into a composite score facilitated the differentiation of amyotrophic lateral sclerosis patients from patients of all other cohorts. To conclude, alterations in peripheral monocyte subsets, as well as increased peripheral and intrathecal activation of CD4+ and CD8+ T cells concomitant with diminished immune regulation by CD56bright natural killer cells, suggest an involvement of these immune cells in amyotrophic lateral sclerosis pathophysiology.
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Affiliation(s)
- Leoni Rolfes
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany.,Department of Neurology, University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf 40225, Germany
| | - Andreas Schulte-Mecklenbeck
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany
| | - Stefanie Schreiber
- Department of Neurology, Otto-von-Guericke University, Magdeburg 39120, Germany.,German Center for Neurodegenerative Diseases, Magdeburg 39120, Germany.,Center for Behavioral Brain Sciences (CBBS), Magdeburg 39106, Germany
| | - Stefan Vielhaber
- Department of Neurology, Otto-von-Guericke University, Magdeburg 39120, Germany.,German Center for Neurodegenerative Diseases, Magdeburg 39120, Germany.,Center for Behavioral Brain Sciences (CBBS), Magdeburg 39106, Germany
| | - Michael Herty
- Institute of Geometry and Applied Mathematics, RWTH Aachen University, Aachen 52062, Germany
| | - Anika Marten
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany
| | - Steffen Pfeuffer
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany
| | - Tobias Ruck
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany.,Department of Neurology, University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf 40225, Germany
| | - Heinz Wiendl
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany
| | - Catharina C Gross
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany
| | - Sven G Meuth
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany.,Department of Neurology, University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf 40225, Germany
| | - Matthias Boentert
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany
| | - Marc Pawlitzki
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Münster 48149, Germany
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Gross CC, Pawlitzki M, Schulte-Mecklenbeck A, Rolfes L, Ruck T, Hundehege P, Wiendl H, Herty M, Meuth SG. Generation of a Model to Predict Differentiation and Migration of Lymphocyte Subsets under Homeostatic and CNS Autoinflammatory Conditions. Int J Mol Sci 2020; 21:ijms21062046. [PMID: 32192056 PMCID: PMC7139518 DOI: 10.3390/ijms21062046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 12/15/2022] Open
Abstract
The central nervous system (CNS) is an immune-privileged compartment that is separated from the circulating blood and the peripheral organs by the blood–brain and the blood–cerebrospinal fluid (CSF) barriers. Transmigration of lymphocyte subsets across these barriers and their activation/differentiation within the periphery and intrathecal compartments in health and autoinflammatory CNS disease are complex. Mathematical models are warranted that qualitatively and quantitatively predict the distribution and differentiation stages of lymphocyte subsets in the blood and CSF. Here, we propose a probabilistic mathematical model that (i) correctly reproduces acquired data on location and differentiation states of distinct lymphocyte subsets under homeostatic and neuroinflammatory conditions, (ii) provides a quantitative assessment of differentiation and transmigration rates under these conditions, (iii) correctly predicts the qualitative behavior of immune-modulating therapies, (iv) and enables simulation-based prediction of distribution and differentiation stages of lymphocyte subsets in the case of limited access to biomaterial. Taken together, this model might reduce future measurements in the CSF compartment and allows for the assessment of the effectiveness of different immune-modulating therapies.
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Affiliation(s)
- Catharina C. Gross
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
- Correspondence:
| | - Marc Pawlitzki
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
| | - Andreas Schulte-Mecklenbeck
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
| | - Leoni Rolfes
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
| | - Tobias Ruck
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
| | - Petra Hundehege
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
| | - Heinz Wiendl
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
| | - Michael Herty
- Institute of Geometry and Applied Mathematics, RWTH Aachen University, Templergraben 55, D-52056 Aachen, Germany;
| | - Sven G. Meuth
- Department of Neurology with Institute of Translational Neurology, University Hospital Münster, Albert-Schweitzer-Campus 1, Building A01, D-48149 Münster, Germany; (M.P.); (A.S.-M.); (L.R.); (T.R.); (P.H.); (H.W.); (S.G.M.)
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