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Meningeal lymphoid structures are activated under acute and chronic spinal cord pathologies.

ABSTRACT: Tertiary lymphoid structures (TLS) are organized aggregates of B and T cells formed ectopically during different stages of life in response to inflammation, infection, or cancer. Here, we describe formation of structures reminiscent of TLS in the spinal cord meninges under several central nervous system (CNS) pathologies. After acute spinal cord injury, B and T lymphocytes locally aggregate within the meninges to form TLS-like structures, and continue to accumulate during the late phase of the response to the injury, with a negative impact on subsequent pathological conditions, such as experimental autoimmune encephalomyelitis. Using a chronic model of spinal cord pathology, the mSOD1 mouse model of amyotrophic lateral sclerosis, we further showed by single-cell RNA-sequencing that a meningeal lymphocyte niche forms, with a unique organization and activation state, including accumulation of pre-B cells in the spinal cord meninges. Such a response was not found in the CNS-draining cervical lymph nodes. The present findings suggest that a special immune response develops in the meninges during various neurological pathologies in the CNS, a possible reflection of its immune privileged nature.

SUBMITTER: Cohen M

PROVIDER: S-EPMC7723261 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Meningeal lymphoid structures are activated under acute and chronic spinal cord pathologies.

Cohen Merav M Giladi Amir A Raposo Catarina C Zada Mor M Li Baoguo B Ruckh Julia J Deczkowska Aleksandra A Mohar Boaz B Shechter Ravid R Lichtenstein Rachel G RG Amit Ido I Schwartz Michal M

Life science alliance 20201204 1

Tertiary lymphoid structures (TLS) are organized aggregates of B and T cells formed ectopically during different stages of life in response to inflammation, infection, or cancer. Here, we describe formation of structures reminiscent of TLS in the spinal cord meninges under several central nervous system (CNS) pathologies. After acute spinal cord injury, B and T lymphocytes locally aggregate within the meninges to form TLS-like structures, and continue to accumulate during the late phase of the r ...[more]

PMID: 33277355

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Meningeal lymphoid structures are activated under acute and chronic spinal cord pathologies.

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Meningeal lymphoid structures are activated under acute and chronic spinal cord pathologies.

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