In this flash back episode, Sarah explores the latest research on astrocytes, gut bacteria and neuroinflammation with scientist and medical researcher Dr. Francisco Quintana. Dr. Quintana is a Professor of Neurology at Harvard Medical School and an Associate Scientist at Brigham and Women’s Hospital in Boston, Massachusetts. He describes some of the causes of neuroinflammation including infection, tumours and auto-immune disease. So what does all of that have to do with astrocytes?