Encephalitis and antibodies to synaptic and neuronal cell surface proteins

Area of Science:

• Neuroscience
• Immunology
• Neurology

Background:

• Autoimmune encephalitis targeting synaptic and cell surface proteins has emerged as a significant area in clinical neurology and neuroscience.
• Key autoantigens include receptors critical for synaptic transmission and plasticity (NMDA, AMPA, GABA(B), glycine receptors) and proteins involved in neuronal adhesion and trans-synaptic complexes (LGI1, CASPR2).

Purpose of the Study:

• To provide an updated review of autoimmune encephalitis syndromes targeting synaptic proteins.
• To emphasize clinical diagnosis and treatment strategies for these disorders.

Main Methods:

• This review synthesizes recent findings on autoimmune encephalitis associated with antibodies against neuronal surface and synaptic antigens.
• Focuses on the clinical presentation, diagnostic approaches, and therapeutic interventions.

Main Results:

• Antibodies against synaptic proteins can directly pathogenicly alter antigen structure and function, leading to severe, protracted neurological syndromes.
• These disorders affect children and young adults, can be associated with tumors, and may relapse despite initial treatment response.

Conclusions:

• Autoimmune encephalitis targeting synaptic proteins represents a treatable, yet potentially severe, neurological condition.
• Understanding the autoantigens and clinical manifestations is key for effective diagnosis and management, improving patient outcomes.