Regulatory Cells in Multiple Sclerosis: From Blood to Brain

Area of Science:

• Neuroimmunology
• Central Nervous System (CNS) Disorders
• Autoimmune Diseases

Background:

• Multiple sclerosis (MS) is a chronic, autoimmune CNS disease affecting myelin.
• While T cells were historically implicated, B cells and innate immune cells also contribute to MS pathology.
• Emerging evidence highlights the protective roles of immunoregulatory cells in MS.

Purpose of the Study:

• To review the involvement of peripheral regulatory cells in MS pathophysiology.
• To discuss the mechanisms by which these cells influence MS histopathology.
• To explore the potential of these cells in promoting CNS remyelination and developing MS therapies.

Main Methods:

• Literature review focusing on peripheral regulatory cells in MS.
• Analysis of the roles of myeloid-derived suppressor cells (MDSCs), regulatory T (Treg) cells, regulatory B (Breg) cells, and CD56bright natural killer cells.
• Examination of their involvement in innate and adaptive immune responses in MS.

Main Results:

• Peripheral regulatory cells, including MDSCs, Treg, Breg, and CD56bright NK cells, are increasingly recognized for their protective functions in MS.
• These cells modulate inflammation, demyelination, and axonal damage.
• They show promise in promoting remyelination within the CNS.

Conclusions:

• Peripheral regulatory cells are critical players in the complex immunopathology of MS.
• Their mechanisms of action offer insights into disease progression and potential therapeutic targets.
• Harnessing the functions of these cells could lead to novel strategies for MS treatment and repair.