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Zondler L, Müller K, Khalaji S, Bliederhäuser C, Ruf WP, Grozdanov V, Thiemann M, Fundel-Clemes K, Freischmidt A, Holzmann K, Strobel B, Weydt P, Witting A, Thal DR, Helferich AM, Hengerer B, Gottschalk KE, Hill O, Kluge M, Ludolph AC, Danzer KM, Weishaupt JH. Peripheral monocytes are functionally altered and invade the CNS in ALS patients. Acta Neuropathol 2016; 132:391-411. [PMID: 26910103 DOI: 10.1007/s00401-016-1548-y] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 02/15/2016] [Accepted: 02/16/2016] [Indexed: 12/13/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a devastating progressive neurodegenerative disease affecting primarily the upper and lower motor neurons. A common feature of all ALS cases is a well-characterized neuroinflammatory reaction within the central nervous system (CNS). However, much less is known about the role of the peripheral immune system and its interplay with CNS resident immune cells in motor neuron degeneration. Here, we characterized peripheral monocytes in both temporal and spatial dimensions of ALS pathogenesis. We found the circulating monocytes to be deregulated in ALS regarding subtype constitution, function and gene expression. Moreover, we show that CNS infiltration of peripheral monocytes correlates with improved motor neuron survival in a genetic ALS mouse model. Furthermore, application of human immunoglobulins or fusion proteins containing only the human Fc, but not the Fab antibody fragment, increased CNS invasion of peripheral monocytes and delayed the disease onset. Our results underline the importance of peripheral monocytes in ALS pathogenesis and are in agreement with a protective role of monocytes in the early phase of the disease. The possibility to boost this beneficial function of peripheral monocytes by application of human immunoglobulins should be evaluated in clinical trials.
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Affiliation(s)
- Lisa Zondler
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Kathrin Müller
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Samira Khalaji
- Department of Experimental Physics, Ulm University, Ulm, Germany
| | - Corinna Bliederhäuser
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Wolfgang P Ruf
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Veselin Grozdanov
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | | | | | - Axel Freischmidt
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | | | | | - Patrick Weydt
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Anke Witting
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Dietmar R Thal
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Anika M Helferich
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | | | | | | | | | - Albert C Ludolph
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Karin M Danzer
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany
| | - Jochen H Weishaupt
- Department of Neurology, Ulm University, Albert-Einstein Allee 11, O25, Niveau 5, 89081, Ulm, Germany.
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