There is only one immune system! The view from immunopathology

Area of Science:

• Immunology
• Cellular Biology
• Molecular Biology

Background:

• The immune system generates diverse specificities for both self and foreign antigens through B and T cell receptors.
• A complex network of regulatory mechanisms controls immune responses, operating both centrally and peripherally.
• The immune system recognizes all potential immunogens using a universal set of rules, without inherent discrimination between self/non-self or benign/toxic entities.

Purpose of the Study:

• To elucidate the fundamental principles governing immune system recognition and regulation.
• To understand how the immune system balances protective responses against potential self-damage.
• To explore the factors influencing the outcome of immune responses.

Main Methods:

• This study is primarily a theoretical and conceptual analysis based on existing immunological principles.
• It synthesizes data from studies on B cell and T cell receptor diversity.
• It reviews established knowledge on central and peripheral immune tolerance mechanisms.

Main Results:

• Immune responses are initiated by the generation of diverse B and T cell specificities.
• Regulatory mechanisms ensure immune homeostasis, preventing autoimmunity and excessive inflammation.
• The outcome of an immune response is critically dependent on the context of antigen presentation and host characteristics.

Conclusions:

• The immune system's recognition of antigens is based on universal rules, not inherent self/non-self discrimination.
• The balance between immune protection and host damage is determined by the quality, quantity, location, and timing of antigen presentation, alongside host factors.