David Krizaj

808 posts

David Krizaj

David Krizaj

@dkrizaj

Professor of Ophthalmology & Visual Sciences Director, Vision Research Training Program, University of Utah

Katılım Ocak 2011
161 Takip Edilen185 Takipçiler
David Krizaj retweetledi
Jason Locasale
Jason Locasale@LocasaleLab·
Boston biotech has been running the same playbook for years and everyone in the ecosystem knows it. Early-stage companies are built less on validated biology and more on signaling: a splashy Nature or Science paper, a thin patent scaffold, and the reputational gravity of well-networked academic founders. That combination is often enough to unlock large funding rounds. The problem is that high-impact publication has become a proxy for truth. It isn’t. It’s a selection mechanism for novelty and narrative. The result is predictable: – groupthink gets reinforced – weak or irreproducible findings persist for years – dissent is disincentivized – hype substitutes for validation In many cases, the goal is not to rigorously test whether an idea is correct, it’s to create enough mystique that it feels important. That perception alone can carry a company surprisingly far. So it’s not surprising to see the same voices recycled across boards and advisory roles—people who helped build and legitimize this model in the first place.
Flagship Pioneering@FlagshipPioneer

Flagship welcomes @EricTopol M.D., as Academic Advisor. A renowned physician-scientist, researcher, and author, Dr. Topol has long been at the forefront of advancing medicine through science and technology. His leadership at the intersection of digital health, genomics and AI has reshaped how we understand disease detection and prevention. We look forward to working with Dr. Topol as we as we accelerate a new era of preemptive health and medicine.

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Olivier George
Olivier George@brainaddiction·
A beast of a paper from @byl015 @UCSDNeuro, dissecting the role of PFC interneurons (PV, SOM, VIP) controlling cocaine seeking. Normally, the PFC inhibits VTA DA neurons via a local GABA interneuron. Classic inhibitory role of the PFC over subcortical regions. Here, they show that chronic cocaine increases the activity of paravalbumin (PV) neurons in the PFC and their connectivity with the PFC pyramidal-VTA pathway, which basically removes the brake on the DA VTA neurons, leading to cocaine seeking. Only parvalbumin (PV) interneurons track and promote cocaine seeking. It's unclear what SOM and VIP do. It's a really incredible paper that demonstrates how powerful PFC interneurons are. Perhaps I'm biased because about 15 years ago we identified CRF interneurons in the PFC as being similarly recruited during withdrawal-induced craving for alcohol. I don't think that CRF colocalizes with PV neurons (probably more with VIP/SOM), so it's intriguing; perhaps it's a drug specificity (cocaine/alcohol), or model (limited vs extended access), or reinforcement specific (positive/negative). Now, the million-dollar question is if you get these mice to the point of dependence, would the VP interneurons still be the ones that matter, or would you see involvement of the SOM, VIP, CRF?
Olivier George tweet media
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Will Kinney
Will Kinney@WKCosmo·
What actually happened is that over the last ten or fifteen years, appeals to consensus were used in support of so many obvious falsehoods that consensus ceased to be a good heuristic for the best available science, and started to be a good heuristic for somebody lying to you.
Adam Frank@AdamFrank4

These distinctions are useful for philosophy/history of science. But as practicing scientist/"science communicator" I watched dismissal of consensus get weaponized back in 2010s by forces of organized climate denial. Now it's used everywhere. That's what we are talking about.

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The Knowledge Archivist
The Knowledge Archivist@KnowledgeArchiv·
“Modern man is in a terrible predicament. He is helplessly enamored with the beauty of what the old world built, yet despises the beliefs that inspired them to build it.” —Jeremey Wayne Tate
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Mushtaq Bilal, PhD
Mushtaq Bilal, PhD@MushtaqBilalPhD·
Major academic publishers' revenue and what they pay authors and reviewers: Revenue: Elsevier: $3.9 billion Springer Nature: $2 billion Wolters Kluwer: $1.6 billion Wiley: $1.8 billion Taylor & Francis: $800 million Sage: $500 million They pay: Authors: $0 Reviewers: $0
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Crémieux
Crémieux@cremieuxrecueil·
Holy shit If your town elects a Republican prosecutor, firearm homicides go down and young men have MUCH lower death rates. As it turns out, you can just choose to prosecute criminals and that saves lives!
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Santi Ruiz@rSanti97

Fascinating paper "...We find that narrow election of a Republican prosecutor reduces all-cause mortality rates among young men ages 20-29 by 6.6%. This decline is driven predominantly by reductions in firearm-related deaths." drive.google.com/file/d/1aEfIlS…

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David Krizaj
David Krizaj@dkrizaj·
"Exercise training increases the intrinsic excitability and density of excitatory synapses on SF1 neurons, suggesting that exercise history is encoded through hypothalamic plasticity." sciencedirect.com/science/articl…
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David Krizaj
David Krizaj@dkrizaj·
‘SuperAgers’ with exceptional episodic memory had a higher number of immature neurons in the hippocampus than other groups, and much more than those with AD. Dysregulated neurogenesis was largely associated with changes in chromatin accessibility..🤔 nature.com/articles/s4158…
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Pascal-Emmanuel Gobry
Pascal-Emmanuel Gobry@pegobry_en·
Said it before & will say it again: dead languages are the only non-scientific discipline where there are objectively correct & incorrect answers to the test & therefore the only humanities discipline that serves as an IQ test like hard science majors do. Once Latin/Greek stopped being a mandatory part of the humanities, humanities stopped being a credible signal of intelligence, and therefore the negative signaling signal group guaranteed that it would become a loser discipline (obviously the politics didn’t help).
Learn Latin@latinedisce

Are you smart enough to study Classical Languages?

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Garett Jones
Garett Jones@GarettJones·
The @cowenconvos content we need:
Garett Jones tweet media
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Arc Institute
Arc Institute@arcinstitute·
People living at high altitude have better glucose tolerance & lower diabetes risk, but the mechanism behind why has remained a mystery. New research out in @Cell_Metabolism from @ishahjain's lab reveals an unexpected answer—red blood cells.
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Andrew Côté
Andrew Côté@Andercot·
A realistic picture of how closely packed molecules are inside a synapse of a nerve cell.
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Brady Holmer
Brady Holmer@Brady_H·
This study is already my candidate for “coolest scientific finding of the year.” It finds that the brain—specifically a set of neurons in the ventromedial hypothalamus (VMH)—is a key intermediate for improvements in endurance capacity. 1. Exercise strengthens inputs to and increases the activity of these SF1 neurons in the VMH. 2. Activation of SF1 neurons following exercise is required to improve endurance. 3. Exogenous activation of SF1 neurons following exercise enhances endurance gains (while inhibition of them diminishes adaptations).
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Brandon Luu, MD
Brandon Luu, MD@BrandonLuuMD·
The first human RCT linking morning bright light to ↑ glymphatic function was just published 8 weeks of morning light in young adults: ↑ Glymphatic (DTI-ALPS) markers ↓ depressive symptoms It was also linked to ↑ prefrontal cortex activity and ↓ inflammatory markers
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Jason Locasale
Jason Locasale@LocasaleLab·
This is what NIH decay looks like. Calling this a list of rockstars is obscene. What it actually shows is who has learned to extract the most from a broken funding system — a system that now resembles a biomedical industrial complex more than a merit-driven scientific enterprise. This is not a ranking of scientific greatness. It is a ranking of grant throughput. If you surveyed 100 cancer scientists and asked them to name the most transformative or promising researchers in the field, the list would look nothing like this. Winning dozens of R01s in five years is not a proxy for transformative discovery. It is a proxy for mastering study section gamesmanship, grant-writing performance, and institutional grant infrastructure. Those are bureaucratic feats inside the biomedical industrial complex. They are not scientific excellence. The question is not who accumulated the most awards. The question is whether marginal dollars are actually going to the best science across a broader base of investigators — or being concentrated in those most adept at navigating the machinery. Celebrating volume of awards as proof of scientific greatness completely misses the point.
Mukund Iyengar@mukundiyngr

Ever wondered who the real rockstars of R01s from the past 5 years? We ranked the most funded PIs in cancer R01s from 2020–2024. Anyone with persistent effort can (maybe) win one R01. Winning 38–48 of them over 5 years is something else entirely. R01s flow towards people whose ideas repeatedly translate into durable programs. Durability means: • hypotheses that age well • biology that generalizes • institutions that trust you with long arcs • and ideas NIH is willing to underwrite repeatedly ======== Meet the rockstars, their institutions, and an examplary funded research: Allen Gao (University of California, Davis @ucdavis) 48 R01 awards | $14.6M Sample Award: 5R01CA271327 Novel therapeutics dual targeting intracrine androgen synthesis and AR for advanced prostate cancer Xiaoqi Liu (University of Kentucky @universityofky ) 46 R01 awards | $20.3M Sample Award: 5R01CA272483-03 Targeting the PLK1/PDCD4/mTORC2 signaling to treat castration-resistant prostate cancer Tim Rebbeck (Dana-Farber Cancer Institute @DanaFarber) 43 R01 awards | $10.4M Sample Award: 5R01CA259200 Genetic and genomic variation in prostate cancer Shoujiang Gao (University of Pittsburgh School of Medicine @PittTweet) 42 R01 awards | $21.3M Sample Award: 5R01CA284554 Impact of microbiota on AIDS-Kaposi’s sarcoma development and therapy James Basilion (Case Western Reserve University School of Medicine @cwru) 39 R01 awards | $18.2M Sample Award: 5R01CA255925 Highly selective targeted theranostics for prostate cancers Binghui Shen (City of Hope Beckman Research Institute @cityofhope) 39 R01 awards | $16.6M Sample Award: 5R01CA233664 DNA repair gene mutations and prostate cancer Daniela Bota (UC Irvine @UCIMedSchool) 39 R01 awards | $10.4M Sample Award: 5R01CA263806 Targeting p38/JNK MAPK to ameliorate cisplatin-induced adverse sequelae on the nervous system Nan Hao (UC San Diego @UCSDMedSchool) 38 R01 awards | $17.1M Sample Award: 1R01AG086348 Engineered genetic clocks for control of cellular aging Zhenghe Wang (Case Western Reserve University School of Medicine @cwru) 38 R01 awards | $16.8M Sample Award: 4R01CA260629 Role of PTPRT in colon cancer progression and metastasis Tony Faber (Virginia Commonwealth University School of Medicine) 38 R01 awards | $16.6M Sample Award: 5R01CA276207 MYCN drives a ferroptotic vulnerability in neuroblastoma

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nature
nature@Nature·
Exercise pumps up your muscles — but it might also be pumping up your neurons go.nature.com/4qxrMmC
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