The Black Death killed half of Europe, however the survivors left a "receipt" in your DNA that still forms your immune system today. Discover how ancient DNA from London's East Smithfield pester pits shows that the 1348 bubonic pester rewrote the human genome and why this genetic legacy is connected to modern autoimmune diseases like Crohn's and Lupus.
TL; DR: Researchers have actually sequenced the genomes of Black Death victims and survivors, determining a specific gene (ERAP2) that provided a 40% survival benefit versus the pester. However, this same hyper-aggressive immune response now increases the threat of inflammatory illness in contemporary, cleaner environments-- a phenomenon known as evolutionary medication.
In This Video: 0:00 - Your Immune System is a Middle Ages Fortress 1:15 - The Graveyard in Your Blood: Genetic Archives 2:45 - East Smithfield: The CSI of Medieval London 4:30 - How to Check Out 700-Year-Old DNA from Teeth 6:10 - ERAP2: The "Survival Gene" Explained 8:45 - The Meat Mill: Development in a Single Generation 10:20 - The Expense Comes Due: Autoimmune Illness Crohn's. 12:15 - Smallpox, Tuberculosis, and the HLA System. 14:30 - Genetic Ghosts: The CCR5-Delta 32 Dispute. 17:00 - Evolutionary Medication: Dealing With the Ancestral Root. 19:00 - You Are the Living Descendant of Winners.
The Hereditary Invoice of 1348. For centuries, the Black Death was a story of dates and death tolls. Today, it's a story of population genetics. By comparing skeletons buried before and after the 1348 outbreak, scientists have discovered that the human body immune system didn't just wander-- it was required through a harsh filter. The survivors handed down an aggressive immune "bouncer" that was optimized for a world of Yersinia pestis.
Why Your Body Attacks Itself ⚠. In our modern, sterilized world, that exact same middle ages bouncer is still looking for a battle. Without the "old buddies" (parasites and microbes) our forefathers lived with, our hyper-tuned body immune systems start firing at shadows. This video explores the compromise between enduring a pandemic and living with chronic inflammation.
Keywords and Research Study Context:. This video covers topics in ancient DNA (aDNA), human evolution, the Black Death history, bubonic pester genes, ERAP2 gene function, autoimmune disease triggers, evolutionary medicine, and the health hypothesis. We look at peer-reviewed proof from the Barreiro and Quintana-Murci studies (2022) and the Sabeti laboratory (2005 ).
