Guillain Barré syndrome

Area of Science:

• Neuroimmunology
• Autoimmune Diseases
• Infectious Disease Immunology

Background:

• Guillain Barré syndrome (GBS) is a post-infectious immune-mediated disease offering insights into autoimmune pathologies.
• Epidemiological studies link GBS to Campylobacter jejuni and viral infections like CMV and EBV.
• GBS involves peripheral nerve damage, primarily a multifocal demyelinating disorder associated with macrophages.

Purpose of the Study:

• To elucidate the pathogenesis of Guillain Barré syndrome.
• To explore the role of immune mechanisms, including antibodies and cellular responses, in GBS.
• To understand the association between specific infections and the development of GBS.

Main Methods:

• Histological examination of peripheral nerve biopsies and postmortem samples.
• Immunological studies to detect antibodies against nerve gangliosides.
• Analysis of the cross-reactivity between antiganglioside antibodies and Campylobacter jejuni lipopolysaccharide.

Main Results:

• Evidence suggests both cell-mediated and humoral immune mechanisms contribute to GBS pathogenesis.
• At least one-third of GBS patients exhibit antibodies against nerve gangliosides.
• Antiganglioside antibodies may cause neuromuscular blockade, particularly in the Miller Fisher variant.

Conclusions:

• Guillain Barré syndrome pathogenesis involves immune responses targeting peripheral nerves, potentially triggered by infections like C. jejuni.
• Antiganglioside antibodies play a significant role, especially in specific variants like Miller Fisher.
• While treatments like IVIg and plasma exchange aid recovery, GBS still carries significant mortality and disability rates.