Bruce Booth

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Bruce Booth

Bruce Booth

@LifeSciVC

Early stage biotech VC. Recovering scientist. Opinions expressed are solely my own and do not express the views or opinions of Atlas Venture.

Cambridge, MA Katılım Aralık 2010
734 Takip Edilen55.4K Takipçiler
Bruce Booth
Bruce Booth@LifeSciVC·
It was a fun privilege to share a few thoughts on building biotechs with Nature Biotechnology for their 30th Anniversary issue - covering a broad range of topics including translating science into medicines, technology cycles, and financing biotech companies... nature.com/articles/s4158…
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Aakash Gupta
Aakash Gupta@aakashgupta·
The US government spent $25 million over a decade trying to prove your cell phone gives you cancer. The study accidentally produced one of the strongest pieces of evidence for radiation hormesis ever recorded. The NTP study was nominated by the FDA in 1999 specifically because they expected to find harm. They built 21 custom reverberation chambers in Switzerland. Exposed 1,679 mice and 859 rats to cell phone frequencies for 9 hours a day, every day, for 2 years. The whole operation was designed as the definitive “cell phones cause cancer” study. The cancer results were mixed at best. Male rats got more heart schwannomas. Mice showed nothing significant. But the survival data was so unexpected that the researchers didn’t even know how to explain it in their own report. Look at the survival curve. Every single radiation group outlived the control. The 2.5 W/kg group hit p=0.0020, the only statistically significant result in the entire longevity analysis. By day 700, the control group’s survival probability had dropped to ~0.65. The lowest dose group was still above 0.80. That’s the hormesis signature. The smallest dose produced the largest benefit. The same pattern shows up in exercise, fasting, and cold exposure. A mild biological stressor activates repair mechanisms that wouldn’t otherwise turn on. Over 3,000 published papers have documented this across microbes, plants, insects, and mammals. The French Academy of Sciences formally accepted it in 2005. The US still builds its entire radiation safety framework on the opposite assumption: that all radiation, at any dose, causes proportional harm. The FCC limit for cell phones is 1.6 W/kg. Your AirPods operate at a fraction of that. The dose that produced the strongest longevity signal in this study was 2.5 W/kg. Barely above the regulatory ceiling. The entire regulatory framework for wireless device safety assumes a dose-response curve that this $25 million study failed to find.
Aakash Gupta tweet media
Zane Koch@zanehkoch

for a while i've had a slight fear that the bluetooth from my airpods could be frying my brain this weekend i pulled the raw data from a $30m government study of 1,679 mice blasted with cell phone radiation and reanalyzed it what i found was...not what I expected? 🧵

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Bruce Booth
Bruce Booth@LifeSciVC·
"Ex-US Clinical Trials: Tribulations, Preparations, and Expectations" - new From The Trenches blog from @ArthurTzianabos, CEO of Lifordi and seasoned drug developer, on the considerations for ex-US clinical trials... lifescivc.com/2026/03/ex-us-…
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Night Sky Now
Night Sky Now@NightSkyNow·
🚨 Your brain is running on just 12 watts right now while processing this sentence. An AI system would need 2.7 billion watts to do the same thing. That's not a typo. The human brain operates on roughly the same amount of power as a dim light bulb, yet it can recognize faces, solve complex problems, create art, and experience emotions simultaneously. Meanwhile, artificial intelligence systems require massive data centers consuming enough electricity to power entire cities just to simulate a fraction of what your brain does effortlessly. Think about what your brain accomplished just reading this far. It decoded symbols into meaning, connected new information to existing memories, probably triggered some emotional responses, and maybe even started forming opinions about AI energy consumption. All while maintaining your heartbeat, breathing, and thousands of other bodily functions. Total power consumption: 12 watts. The most advanced AI systems need server farms filled with thousands of high-powered processors, industrial cooling systems, and backup power supplies. They consume roughly 225 million times more energy than your brain to perform similar cognitive tasks. It's like comparing a bicycle to a freight train in terms of efficiency. This incredible disparity reveals just how remarkably evolution has optimized biological intelligence. Millions of years of natural selection created a thinking machine so efficient it makes our most advanced technology look primitive and wasteful by comparison. Your smartphone uses more power than your brain while being infinitely less capable. Every thought you're having right now represents the pinnacle of energy-efficient computing, wrapped in three pounds of biological tissue that somehow generates consciousness, creativity, and dreams. Nature got there first, and we're still trying to catch up.
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Bruce Booth
Bruce Booth@LifeSciVC·
Congrats $DAWN and Servier! Another chapter in a fascinating story of bringing tovorafenib to patients around the world...
Bruce Booth@LifeSciVC

With the approval of tovorafenib by $DAWN, it’s worth celebrating the long journey of R&D in our business. Others have written on this better (@JacobPlieth @SFBIZronleuty), but here’s the short story: The molecule was discovered in a collaboration between Sunesis & Biogen that started 20 years ago. Biogen deprioritized oncology under CEO Scangos and stopped working on RAF in 2010, reverting rights back to Sunesis. But tovo was covered by key patents from the collaboration, which were assigned to Sunesis. Fwiw, two of the co-inventors of tovo later became Atlas entrepreneurs: Gnanasambandam Kumar Kumaravel (Padlock) and Alexey Lugovsky (Diagonal). Small world of both the Biogen diaspora and the @atlasventure network. Takeda licensed it from Sunesis in 2011, and over next 6-7 years its clinical work in melanoma failed to deliver. Physician-scientist/pediatric oncologist @drsam co-founded Day One with @JuliePapanek in 2019 to focus on pediatric cancer. They license tovo from Takeda in 2020, and my partner @MikeNGladstone convinced Atlas to join Canaan Partners in the $60M Series A, as did Access Industries. Company goes public in a 2021 IPO. Sunesis retained some economics in tovo. It did a reverse merger in 2021, and became Viracta. It sold its tovo milestones/royalties to Xoma later that year. After the success of Firefly-1 in pediatric LGG, tovo (Ojemda) was granted accelerated approval, with the ongoing Phase 3 Firefly-2 study underway. Amazing journey, with many teams participating along the way. It takes a village... or at least a collaborative ecosystem... to bring drugs to patients.

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Bruce Booth
Bruce Booth@LifeSciVC·
Bruce Booth@LifeSciVC

With the approval of tovorafenib by $DAWN, it’s worth celebrating the long journey of R&D in our business. Others have written on this better (@JacobPlieth @SFBIZronleuty), but here’s the short story: The molecule was discovered in a collaboration between Sunesis & Biogen that started 20 years ago. Biogen deprioritized oncology under CEO Scangos and stopped working on RAF in 2010, reverting rights back to Sunesis. But tovo was covered by key patents from the collaboration, which were assigned to Sunesis. Fwiw, two of the co-inventors of tovo later became Atlas entrepreneurs: Gnanasambandam Kumar Kumaravel (Padlock) and Alexey Lugovsky (Diagonal). Small world of both the Biogen diaspora and the @atlasventure network. Takeda licensed it from Sunesis in 2011, and over next 6-7 years its clinical work in melanoma failed to deliver. Physician-scientist/pediatric oncologist @drsam co-founded Day One with @JuliePapanek in 2019 to focus on pediatric cancer. They license tovo from Takeda in 2020, and my partner @MikeNGladstone convinced Atlas to join Canaan Partners in the $60M Series A, as did Access Industries. Company goes public in a 2021 IPO. Sunesis retained some economics in tovo. It did a reverse merger in 2021, and became Viracta. It sold its tovo milestones/royalties to Xoma later that year. After the success of Firefly-1 in pediatric LGG, tovo (Ojemda) was granted accelerated approval, with the ongoing Phase 3 Firefly-2 study underway. Amazing journey, with many teams participating along the way. It takes a village... or at least a collaborative ecosystem... to bring drugs to patients.

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Jacob Plieth
Jacob Plieth@JacobPlieth·
$DAWN acquisition by Servier for $2.5bn is quite the ending for Ojemda. Who remembers this RAF inhibitor's bizarre & convoluted history? $BIIB $TAK
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Bruce Booth
Bruce Booth@LifeSciVC·
"Dual Wielding in I&I: A Pivotal Year Ahead" - new blog - Atlas EIR Cody Tranbarger with a tour de force on the bispecific opportunities in autoimmune... lifescivc.com/2026/02/dual-w…
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Jack Scannell
Jack Scannell@JackScannell13·
It may be that failure to count competitors stampeding towards your de-risked target is now the single biggest reason drug R&D programs fail in Phase 2 & 3. "Commercial" termination overtakes "efficacy" circa 2019: nature.com/articles/d4157… Recent oncology example (TIGIT herding): bmjoncology.bmj.com/content/5/1/e0…
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Bruce Booth
Bruce Booth@LifeSciVC·
@drrichjlaw Of course when your private biotech blows up, after you've paid 36% cap gains taxes on the paper gain, then you'll get a big refund / tax loss deductable the next year.... Right? Right?
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Rich Law
Rich Law@drrichjlaw·
Be interesting to hear from Dutch biotech VCs about how they think this effect them. Does it effectively make fund raising as a founder impossible because you suddenly owe tax on what your shares are theoretically worth? That sounds mad!
Jelle@CryptoJelleNL

Sad day in NL, the Dutch government is expected to pass a bill introducing a 36% tax on unrealized capital gains. This will destroy long-term strategies, kill compounding effects & trigger a wealth exodus of biblical proportions. But they'll pass it anyway. Can't fix stupid.

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Bruce Booth
Bruce Booth@LifeSciVC·
Humbling 30 year Biotech stats shared by @verdadcap in a recent report: Just over 1,000 biotechs hit $200M mkt cap at some point. Of those, 67% have lost value (had cumulative negative returns), vs 48% for all other US companies. Of these 600+ biotechs, roughly 50% were acquired at negative total returns, 10% delisted, the remaining 40% are still public and underwater for their average investor The median biotech company in this period has delivered an annualized return of -15% (vs 1% for other US Companies). It's a tough business.
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Bruce Booth
Bruce Booth@LifeSciVC·
@MedlockGreg But the instrument of measurement - the thermometer - over the last 50 years probably had an average accuracy of 0.5C. Making these analytics overwhelmingly noisy.
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Greg Medlock
Greg Medlock@MedlockGreg·
@LifeSciVC This, among other reasons, is why sig figs are not generally taught or emphasized in graduate biomedical science curricula.
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Bruce Booth
Bruce Booth@LifeSciVC·
Pet peeve: why do "scientists" forget about the concept of significant figures? Happens all the time, in biotech & beyond. Too many decimal places scream lack of credibility. "Sig figs" is a simple concept: measurement readings should not push beyond instrument uncertainty. Exhibit A for sig fig violations: temperature readings down to 5-6 sig figs, across 27K daily county-level measurements, for 50+ years. Check out the y-axes. Crazy.
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Bruce Booth
Bruce Booth@LifeSciVC·
The return to prevalent diseases... Big is Beautiful. LEK captures the evolution of the top 10 biggest drugs... 2010 all were prevalent, by 2015 most were rare/specialty, now swinging back again.
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Bruce Booth
Bruce Booth@LifeSciVC·
What's the optimal price for an IPO? Four biotech IPOs last week, busiest single week since 2021 euphoria. $MANE finished up 125% for the week, and is widely being celebrated. Of course up is much much better than breaking issue price.  But what’s the right “IPO bounce”?  Being 100%+ means the existing shareholders took WAY MORE dilution than they should have. I’d argue the best & most optimally-priced IPO sees a first day 20-30% gain.  That’s the right Goldilocks balance of dilution and price appreciation. To get it right requires proper price discovery (TTWs, Roadshow), a strong and well-covered book (ECM desk working hard), and a biotech Board/Mgt team that works to optimize for both existing and new investors with that Goldilocks position. Any IPO that sees huge gains on it's first day, or materially breaks below pricing, is fundamentally mispriced by the bankers and Board, IMO.
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