4.5 Review

Regulatory T cell therapy for multiple sclerosis: Breaching (blood-brain) barriers

Journal

HUMAN VACCINES & IMMUNOTHERAPEUTICS
Volume 18, Issue 7, Pages -

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/21645515.2022.2153534

Keywords

Regulatory T cells; multiple sclerosis; blood-brain barrier; diapedesis; regulatory T cell therapy

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Multiple sclerosis (MS) is an autoimmune disorder characterized by demyelination and neurodegeneration in the central nervous system. Regulatory T cells (Tregs), which have the ability to suppress immune reactions and regenerate, may have therapeutic potential for MS. However, Tregs in people with MS are functionally impaired. To exert their anti-inflammatory and regenerative effects in the brain, Tregs must first migrate across the blood-brain barrier (BBB).
Multiple sclerosis (MS) is an autoimmune disorder causing demyelination and neurodegeneration in the central nervous system. MS is characterized by disturbed motor performance and cognitive impairment. Current MS treatments delay disease progression and reduce relapse rates with general immunomodulation, yet curative therapies are still lacking. Regulatory T cells (Tregs) are able to suppress autoreactive immune cells, which drive MS pathology. However, Tregs are functionally impaired in people with MS. Interestingly, Tregs were recently reported to also have regenerative capacity. Therefore, experts agree that Treg cell therapy has the potential to ameliorate the disease. However, to perform their local anti-inflammatory and regenerative functions in the brain, they must first migrate across the blood-brain barrier (BBB). This review summarizes the reported results concerning the migration of Tregs across the BBB and the influence of Tregs on migration of other immune subsets. Finally, their therapeutic potential is discussed in the context of MS.

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