Lab-Grown Human Mini-Brains Have Now Lived and Aged Six Years

Harvard kept human brain organoids alive six years as their DNA age markers advanced, and Syntax Bio says it made insulin-type cells in four days, though it has shown no insulin data.

TL;DR

Scientists can now grow small pieces of human organs in a dish that last for years and grow older on their own clock. Harvard kept human brain organoids, small clusters of brain tissue grown from stem cells, alive for six years, and chemical markers of age on their DNA kept advancing. That gives researchers something they have never had: living human brain tissue that ages, to study how brains decline without waiting on a human lifetime. Separately, a company says it can push stem cells toward insulin-making cells in four days instead of weeks. Neither result has touched a patient, and the second is a company claim without the key test. But together with a regulatory shift away from animal testing, lab-grown human tissue is becoming a real alternative test subject, and that could change how fast drugs, including drugs against aging, are screened.

Below the line, for paid subscribers: The full story: where it stands, how we got here and what's dated next; our Odds board on 4 milestones, starting with "Syntax Bio shows its four-day beta-like cells release insulin by 2027"; and every source.