Bio Eats World

The Biology of Brain Organoids (or, Don't Call it a Brain in a Dish!)

Episode Summary

Our understanding of the human brain and its disorders has always been limited by our lack of access to living, human, developing brain tissue. For the first time, that’s changing. In this episode (first aired on the a16z Podcast), Sergiu Pasca, Professor of Behavioral Science at Stanford, talks with a16’z General Partner Vijay Pande and Bio Eats World host Hanne Winarsky about the wild new tech that’s pioneering a whole new approach to understanding the brain: brain organoids. So what are brain organoids, what are the scientific breakthroughs that lead to their creation, and how can we use them best? The conversation starts with the existing models we have used to learn about the living brain, from genetic studies to autopsies to primates—and what this new model now brings us: the ability to study the human brain, both how it develops and what goes wrong in certain disorders, with human brain tissue “alive” in a dish. We talk about what these organoids can and can’t do; what they’re good for understanding and where that understanding becomes limited; why calling these “brains in a dish” or “mini-brains” isn’t the right terminology at all; and finally, how far can this new tool and model be taken now and in the future, maybe even leading us closer towards understanding psychology itself on a molecular level.

Episode Notes

For more on brain organoids and their many applications, check out this episode of Journal Club: "Modeling Mysterious Brain Structures." Host Lauren Richardson talks to Dr. Madeline Lancaster, a Group Leader at the MRC Laboratory of Molecular Biology in Cambridge, about her lab's article in Science describing an organoid model for studying the cerebrospinal fluid and the choroid plexus, and how these organoids can be used to study brain development, evolution, and improve the drug development process.