Repurposing the Immune System to Meet Therapeutic Need in the Brain | Lisa Boulanger

TL;DR

Immune system genes play a crucial role in the brain's pruning process during development, and their dysfunction can contribute to disorders such as autism and schizophrenia.

Transcript

the brain and the immune system are isolated from each other in your body when that immune brain divide breaks down it can contribute to disorders of the brain including multiple sclerosis that can be a real problem you want to keep these two separated what we've discovered is that in fact key elements of the immune system have important jobs in th... Read More

Key Insights

• 🧠 The brain and immune system are interconnected, and their breakdown can contribute to brain disorders such as multiple sclerosis.
• 🧠 Immune system genes, known as MHC class 1 genes, are highly expressed in the brain during the pruning process, influencing brain development.
• 🥺 Deficiency in MHC class 1 genes leads to problems in the pruning of developing brain circuits.
• 🧠 Immune challenges and infections during early development can directly affect brain development and contribute to neurodevelopmental disorders.
• 🧠 MHC levels also rise in the brain after injury, indicating their role in pruning damaged brain tissue.
• 🧑‍🦼 MHC-deficient mice retain their circuitry better and show indications of youthful motor function and cognitive abilities.
• 🧑‍🚒 Completely blocking MHC function is not desirable as it is crucial for fighting infections and cancers.

Questions & Answers

Q: How are the brain and immune system connected?

When the brain's immune system breaks down, it can contribute to disorders of the brain such as multiple sclerosis. Keeping these systems separated is crucial for maintaining brain health.

Q: Why is the pruning process important in brain development?

During early brain development, excessive synapses are formed, and a pruning process is necessary to eliminate the excess and establish mature brain circuitry. Failure in this pruning process can contribute to disorders like autism and schizophrenia.

Q: What are MHC class 1 genes, and what is their role in brain development?

MHC class 1 genes, essential for fighting off infections and cancers, were found to be highly expressed in the brain during the pruning process. Their deficiency leads to problems in the pruning of developing brain circuits.

Q: How do immune challenges and infections affect brain development?

Immune challenges and infections during pregnancy or early childhood can change the levels of immune genes involved in brain development. This could lead to disorders such as microcephaly, autism, or schizophrenia.

Summary & Key Takeaways

• The brain and immune system are interconnected, and the breakdown of their isolation can lead to brain disorders like multiple sclerosis.

• Key elements of the immune system have important roles in brain development, specifically in the pruning process of synapses.

• Immune system genes, known as MHC class 1 genes, are highly expressed in the brain during the pruning process, indicating their involvement in brain development.