[Humoral and cellular autoimmunity: from physiology to pathology]

Area of Science:

• Immunology
• Autoimmunity
• Cellular Biology

Context:

• The immune system normally distinguishes self from non-self.
• Dysregulation of self-tolerance can lead to autoimmune diseases.
• Recent discoveries offer new insights into immune system regulation.

Purpose:

• To explore recent advancements in understanding immune system homeostasis and activation.
• To examine the role of newly discovered factors in the pathogenesis of autoimmune diseases.
• To highlight the potential for improved therapeutic strategies.

Summary:

• The discovery of BAFF (B-cell activating factor) and APRIL (A Proliferation Inducing Ligand) and their receptors clarifies B lymphocyte homeostasis and activation.
• A novel helper T cell subset secreting IL-17 (interleukin-17) alters the etiological framework of autoimmune diseases.
• Regulatory T lymphocytes are crucial for controlling self-reactive lymphocytes and may contribute to autoimmune disease development.

Impact:

• These findings improve the understanding of complex autoimmune disease mechanisms.
• Further research will clarify the specific roles of these factors.
• This knowledge facilitates better-targeted treatments and improved patient management.