B-lymphocyte contributions to human autoimmune disease

Area of Science:

• Immunology
• Autoimmunity Research
• Cellular Biology

Background:

• Autoimmunity stems from aberrant B- and T-cell recognition of self-antigens.
• Autoantibodies, while diagnostic markers, significantly contribute to autoimmune disease pathogenesis.
• B cells, derived from plasma cells, are central to autoantibody production.

Purpose of the Study:

• To review the multifaceted roles of B cells in autoimmunity beyond autoantibody production.
• To explore B cells' functions as cellular adjuvants and regulators of immune responses.
• To discuss the implications for developing targeted autoimmune disease therapies.

Main Methods:

• Review of existing literature on B cell function in autoimmunity.
• Analysis of B cell roles in T-cell activation and immune regulation.
• Examination of B cell involvement in various autoimmune diseases.

Main Results:

• B cells act as cellular adjuvants for CD4(+) T-cell activation.
• Regulatory B cells, including B10 cells, suppress inflammatory responses.
• B cells, autoantibodies, and T cells collectively drive autoimmune pathology.

Conclusions:

• B cell functions are closely linked to disease activity in systemic lupus erythematosus, rheumatoid arthritis, scleroderma, type 1 diabetes, and multiple sclerosis.
• Understanding B cell roles is crucial for developing precise and combination therapies.
• Targeted therapies hold promise for broader clinical efficacy compared to non-specific B cell depletion.