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Robert Langer: Edison of Medicine | Lex Fridman Podcast #105

Robert Langer is a professor at MIT and one of the most cited researchers in history, specializing in biotechnology fields of drug delivery systems and tissue engineering. He has bridged theory and practice by being a key member and driving force in launching many successful biotech companies out of MIT. Support this podcast by signing up with these sponsors: - MasterClass: https://masterclass.com/lex - Cash App - use code "LexPodcast" and download: - Cash App (App Store): https://apple.co/2sPrUHe - Cash App (Google Play): https://bit.ly/2MlvP5w EPISODE LINKS: Bob's Lab Website: https://langerlab.mit.edu/ Bob's Google Scholar: https://scholar.google.com/citations?user=5HX--AYAAAAJ Bob's Wiki: https://en.wikipedia.org/wiki/Robert_S._Langer PODCAST INFO: Podcast website: https://lexfridman.com/podcast Apple Podcasts: https://apple.co/2lwqZIr Spotify: https://spoti.fi/2nEwCF8 RSS: https://lexfridman.com/feed/podcast/ Full episodes playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4 Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41 OUTLINE: 0:00 - Introduction 3:07 - Magic and science 5:34 - Memorable rejection 8:35 - How to come up with big ideas in science 13:27 - How to make a new drug 22:38 - Drug delivery 28:22 - Tissue engineering 35:22 - Beautiful idea in bioengineering 38:16 - Patenting process 42:21 - What does it take to build a successful startup? 46:18 - Mentoring students 50:54 - Funding 58:08 - Cookies 59:41 - What are you most proud of? CONNECT: - Subscribe to this YouTube channel - Twitter: https://twitter.com/lexfridman - LinkedIn: https://www.linkedin.com/in/lexfridman - Facebook: https://www.facebook.com/LexFridmanPage - Instagram: https://www.instagram.com/lexfridman - Medium: https://medium.com/@lexfridman - Support on Patreon: https://www.patreon.com/lexfridman

Lex FridmanhostRobert (Bob) Langerguest
Jun 29, 20201h 2mWatch on YouTube ↗

At a glance

WHAT IT’S REALLY ABOUT

Robert Langer on Engineering Drugs, Tissues, and Scientific Failure

  1. Lex Fridman interviews MIT professor Robert Langer, one of the most cited engineers in history, about his pioneering work in drug delivery, tissue engineering, and biotech entrepreneurship.
  2. Langer explains how fundamental discoveries in controlled-release polymers and blood-vessel growth inhibitors led to blockbuster cancer drugs and opened entire fields in bioengineering.
  3. They discuss the complexity of the human body, challenges of drug development and clinical trials, and the promise of future technologies like smart delivery systems, CRISPR, organs-on-chips, and regenerative medicine.
  4. Langer also reflects on failure, funding, patents, building companies, leading a large lab, and why he sees his students’ success as his greatest achievement.

IDEAS WORTH REMEMBERING

5 ideas

Transformative science often starts with rejection and uncertainty.

Langer’s early landmark papers on blood-vessel inhibitors and controlled-release polymers were rejected by top journals, forcing him to clarify and improve his explanations while maintaining belief in the underlying science.

Drug delivery is as critical as the drug itself.

Creating polymers that can release molecules slowly and locally over months enabled entirely new therapies, such as angiogenesis inhibitors for cancer and eye disease, illustrating that engineering the delivery mechanism can unlock biological breakthroughs.

Bringing a new drug to patients is long, expensive, and high‑risk.

Developing a drug typically costs over $2 billion, with the most expensive part being human clinical trials that must carefully prove safety and efficacy through phased studies in hundreds or thousands of patients.

Tissue engineering is moving from concept to clinic.

Engineered tissues like skin are already FDA‑approved for burns and diabetic ulcers, and advanced trials are underway for blood vessels and other tissues, showing that scaffold-plus-cells strategies are clinically viable.

Future therapies will blend biology, engineering, and intelligence.

Langer envisions smart drug-delivery systems, microchips, and eventually nano‑scale “robots” inside the body, potentially guided by AI that learns from large chemical and biological datasets to optimize design and response.

WORDS WORTH SAVING

5 quotes

Nothing great, I think, is ever achieved without failure.

— Robert Langer

Drug delivery is getting a drug to go where you want it at the level you want it in a safe way.

— Robert Langer

I think of a scaffold as a canvas on which cells can grow.

— Robert Langer (paraphrasing and endorsing Lex Fridman’s analogy)

At a high level, it is amazing. I mean, evolution’s amazing… the fact that we have evolved the way we’ve done is pretty remarkable.

— Robert Langer

My students… they’re not my children, but they’re close to my children in a way.

— Robert Langer

Connection between magic, surprise, and scientific discoveryEarly breakthroughs in drug delivery and angiogenesis (blood vessel growth) inhibitionDrug discovery and development pipeline, including clinical trials and regulationAdvanced drug delivery: targeting, smart systems, and potential medical “robots”Tissue engineering and regenerative medicine (skin, blood vessels, organs-on-chips)Role of AI and data in drug design and biomedical innovationPatents, biotech startups, funding, and leadership in academic research

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