What is it about?
LGI1 autoantibodies can cause a rare autoimmune brain disease associated with seizures and memory problems. Using living human hippocampal tissue obtained during epilepsy surgery, we investigated how these antibodies affect human brain cells. We found that the antibodies make neurons overly active and disrupt their normal electrical signaling, helping to explain how the disease alters brain function. Our study shows how living human brain tissue can provide new insights into neurological diseases and support the development of future treatments.
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Why is it important?
Most research on autoimmune encephalitis has been performed in animal models, leaving open the question of whether the same mechanisms occur in the human brain. By studying living human hippocampal tissue obtained during epilepsy surgery, we provide rare direct evidence of how LGI1 autoantibodies alter the activity of human neurons. Our work highlights the value of studying living human brain tissue to better understand neurological diseases and to support the development and testing of future treatments.
Perspectives
What I find most exciting about this study is that it allowed us to investigate a rare autoimmune brain disease directly in living human brain tissue. Human tissue studies are technically challenging and uncommon, but they offer a unique opportunity to understand how neurological diseases truly affect the human brain. For me, this work represents an important bridge between basic neuroscience and clinically relevant research, and it highlights the remarkable value of collaborations between clinicians, patients, and basic scientists.
Laura Monni
University of Modena and Reggio Emilia, Italy
Read the Original
This page is a summary of: The functional impact of LGI1 autoantibodies on human CA3 pyramidal neurons, Proceedings of the National Academy of Sciences, May 2026, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.2510121123.
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