Cited by 386Multiple Sclerosis Research StudiesNeuroinflammation and Neurodegeneration MechanismsPeripheral Neuropathies and Disorders

Meningeal inflammation plays a role in the pathology of primary progressive multiple sclerosis.

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Choi, Sung R., Howell, Owain W., Carassiti, Daniele, Magliozzi, Roberta, Gveric, Djordje, Muraro, Paolo A., Nicholas, Richard, Roncaroli, Federico +1 more·2012·Brain

Abstract

The primary progressive form of multiple sclerosis is characterized by accrual of neurological dysfunction from disease onset without remission and it is still a matter of debate whether this disease course results from different pathogenetic mechanisms compared with secondary progressive multiple sclerosis. Inflammation in the leptomeninges has been identified as a key feature of secondary progressive multiple sclerosis and may contribute to the extensive cortical pathology that accompanies progressive disease. Our aim was to investigate the extent of perivascular and meningeal inflammation in primary progressive multiple sclerosis in order to understand their contribution to the pathogenetic mechanisms associated with cortical pathology. A comprehensive immunohistochemical analysis was performed on post-mortem brain tissue from 26 cases with primary progressive multiple sclerosis. A variable extent of meningeal immune cell infiltration was detected and more extensive demyelination and neurite loss in the cortical grey matter was found in cases exhibiting an increased level of meningeal inflammation. However, no tertiary lymphoid-like structures were found. Profound microglial activation and reduction in neuronal density was observed in both the lesions and normal appearing grey matter compared with control cortex. Furthermore, cases with primary progressive multiple sclerosis with extensive meningeal immune cell infiltration exhibited a more severe clinical course, including a shorter disease duration and younger age at death. Our data suggest that generalized diffuse meningeal inflammation and the associated inflammatory milieu in the subarachnoid compartment plays a role in the pathogenesis of cortical grey matter lesions and an increased rate of clinical progression in primary progressive multiple sclerosis.

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Crossref · 10.1093/brain/aws189

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  • While ectopic lymphoid follicles (ELFs) are only present in ~40% of secondary progressive multiple sclerosis (SPMS) cases, diffuse meningeal inflammation plays a role in the pathology of primary progressive MS and the remaining 60% of SPMS.

    “While ELFs are only present in ~ 40% of SPMS cases, diffuse meningeal inflammation plays a role in the pathology of PPMS and the remaining 60% of SPMS [70, 72].”
  • The presentation of MS induced leptomeningeal inflammation can be variable, ranging from disorganized collections of immune cells to organized ectopic lymphoid follicle-like structures, and these ectopic lymph structures are potentiated by leptomeningeal fibroblasts which form a reticular cell network consisting of activated fibroblasts in a scaffold-like structure that might be driven by a subset

    “The presentation of MS induced leptomeningeal inflammation can be variable, ranging from disorganized collections of immune cells to organized ectopic lymphoid follicle-like structures”

    From Living on the Edge of the CNS: Meninges Cell Diversity in Health and Disease (2021) · cites this paper as Choi et al., 2012

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Authors
Choi, S. R., Howell, O. W., Carassiti, D., Magliozzi, R., Gveric, D., Muraro, P. A., Nicholas, R., Roncaroli, F., & Reynolds, R.
Affiliations
  • Hammersmith Hospital (GB)
  • Istituto Superiore di Sanità (IT)
Venue
Brain
Published
2012-08-18
Volume
135
Issue
10
Pages
2925-2937
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2131288952
Cited by
386
References
39
Citations by year
2026: 12 · 2025: 13 · 2024: 35 · 2023: 33 · 2022: 27 · 2021: 37 · 2020: 28 · 2019: 35 · 2018: 32 · 2017: 22 · 2016: 24 · 2015: 27 · 2014: 29 · 2013: 28 · 2012: 4
FWCI
20.26
Type
journal article
Language
en
Licence
other-oa
Locations
  • Brain (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • INFM-OAR (INFN Catania) (submittedVersion, other-oa)
Funders
Parkinson's UK (G0909)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Peripheral Neuropathies and Disorders
Keywords
primary progressive multiple sclerosis, meningeal inflammation, perivascular inflammation, demyelination, microglial activation, neuronal loss, disease progression, postmortem brain
MeSH terms
Adult, Aged, Aged, 80 and over, Demyelinating Diseases, Humans, Inflammation, Male, Meninges, Middle Aged, Time Factors, Disease Progression, Multiple Sclerosis, Chronic Progressive

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