Guillain-Barré syndrome

Area of Science:

• Neuroimmunology
• Infectious Disease Immunology
• Autoimmune Neuropathies

Background:

• Guillain-Barré syndrome (GBS) is an autoimmune disorder typically following bacterial or viral infections.
• Campylobacter jejuni is the most common preceding pathogen, implicated in triggering GBS.
• The pathogenesis involves immune responses cross-reacting with neural tissues due to molecular mimicry.

Purpose of the Study:

• To elucidate the autoimmune mechanisms underlying Guillain-Barré syndrome.
• To understand the role of Campylobacter jejuni in GBS pathogenesis.
• To describe the clinical manifestations and management of GBS.

Main Methods:

• Review of existing literature on GBS pathogenesis and triggers.
• Analysis of immune response mechanisms, including humoral and cellular immunity.
• Description of clinical presentations, including acute inflammatory demyelinating polyneuropathy and acute axonal forms.

Main Results:

• Immune responses to Campylobacter jejuni epitopes mimic peripheral nerve gangliosides, leading to autoimmune attack.
• 85% of GBS cases involve immune reactions targeting Schwann cell surface membrane or myelin (demyelinating form).
• 15% of GBS cases involve immune reactions targeting axonal membrane components (axonal forms).

Conclusions:

• GBS is a self-limited autoimmune disease triggered by infections, with Campylobacter jejuni being a primary antecedent.
• Optimal supportive care, including ICU admission and ventilation when needed, is crucial.
• Immunomodulatory therapies like IVIg and plasma exchange can shorten the disease course.