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Riccardo Capecchi

@blepiro

MD, PhD. Clinical Immunologist hidden inside an Internist. Sssshhhh. #medsky #immunosky #rheumatology

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Latest posts by Riccardo Capecchi @blepiro

A man wearing a blue shirt stands in a hallway, with walls and floor visible in the background.

A man wearing a blue shirt stands in a hallway, with walls and floor visible in the background.

We're proud to announce that infectious disease pioneer Jean-Laurent Casanova, MD, PhD, of @rockefeller.edu, @institutimagine.bsky.social, @hhmi-science.bsky.social, & @casanovalab.bsky.social, is the recipient of the 2026 Mechthild Esser #NemmersPrize in Medical Science: spr.ly/6008hCUaM

05.03.2026 20:56 πŸ‘ 22 πŸ” 6 πŸ’¬ 2 πŸ“Œ 0

Indeed, we screen all severe cocci patients referred to UCLA (rare, yes ~ 2/month) for their Th2 ratio before starting dupilumab. As you'll see in an upcoming JCI Insight paper (!) we defined a threshold Th2/Th1 ratio of >1.27 as a useful cutoff for treatment. It's personalized therapy, indeed!

06.03.2026 20:22 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Native chromatome profiling reveals hundreds of metabolic enzymes in the nucleus across tissues - Nature Communications Here proteomic chromatome analysis shows metabolic enzymes widely localize to chromatin in cancer in a tissue-specific manner. Nuclear enzymes affect DNA damage/repair and transcription, revealing non...

New paper out in Nature Communications:
www.nature.com/articles/s41...
We found >250 metabolic enzymes on chromatin.
Only ~20 had been reported before.
This means hundreds of metabolic enzymes may have unexplored nuclear roles.

06.03.2026 15:11 πŸ‘ 48 πŸ” 15 πŸ’¬ 2 πŸ“Œ 2
Toward the end of his two-volume Treatise on the Venom of the Viper, published in 1781, the Tuscan naturalist Deluxe Fontana declared: "I have made more than 6000 experiments; I have had more than 4000 animals bit; I have employed upwards of 3000 vipers and may have been deceived; some essential circumstance may have escaped me: I may have neglected some other, not thinking it necessary; my consequences may have been too general, my experiments too few in number. In a word, I may very easily have been mistaken, and it would be almost impossible that I should never have been so in a matter so difficult, so obscure, and likewise so new."

Toward the end of his two-volume Treatise on the Venom of the Viper, published in 1781, the Tuscan naturalist Deluxe Fontana declared: "I have made more than 6000 experiments; I have had more than 4000 animals bit; I have employed upwards of 3000 vipers and may have been deceived; some essential circumstance may have escaped me: I may have neglected some other, not thinking it necessary; my consequences may have been too general, my experiments too few in number. In a word, I may very easily have been mistaken, and it would be almost impossible that I should never have been so in a matter so difficult, so obscure, and likewise so new."

Fontana thinking his 6000+ experiments may not have been enough to feel confident in his conclusions in the 18th century while we expect our singular experiments and their standalone replications to do wonders some 250 years later... (excerpt from the intro of Jutta Schickore's About Experiment)

23.02.2026 07:32 πŸ‘ 125 πŸ” 29 πŸ’¬ 5 πŸ“Œ 3

Hey the guy that makes the deepfake generator and suicide machine is gonna get into the murderbot business sounds great what could go wrong

28.02.2026 03:30 πŸ‘ 391 πŸ” 99 πŸ’¬ 6 πŸ“Œ 1

These results suggest that initial exposure to X’s algorithm has persistent effects on users’ current political attitudes and account-following behaviour, even in the absence of a detectable effect on partisanship.

Don’t follow conservative political activist, those posting every incidence of crime

23.02.2026 08:23 πŸ‘ 11 πŸ” 7 πŸ’¬ 1 πŸ“Œ 0
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The political effects of X’s feed algorithm - Nature Among users initially on a chronological feed, 7 weeks of exposure to X’s algorithmic feed in 2023 shifted political attitudes and account-following behaviour in a more conservative direction compared...

Something that probably you already know, but on Nature:

www.nature.com/articles/s41...

21.02.2026 11:28 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Cartoon by Mike Luckovich.

19.02.2026 23:51 πŸ‘ 19213 πŸ” 7117 πŸ’¬ 278 πŸ“Œ 255
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β€˜Don’t go to the US – not with Trump in charge’: the UK tourist with a valid visa detained by ICE for six weeks Karen Newton was in America on the trip of a lifetime when she was shackled, transported and held for weeks on end. With tourism to the US under increasing strain, she says, β€˜If it can happen to me, i...

This sort of thing is why people are understandably not coming to the US. I would be really surprised if the expected international crowds arrive for the World Cup, at least at the US venues. Maybe some diehard fans will come. But the risk is just too great.

21.02.2026 06:39 πŸ‘ 686 πŸ” 292 πŸ’¬ 38 πŸ“Œ 74

I am sorry but this is still the core problem with trying to parse anything he says about tariffs.

20.02.2026 18:45 πŸ‘ 2473 πŸ” 529 πŸ’¬ 20 πŸ“Œ 9

Vedi figlio mio, se ti impegni e lavori duramente, alla fine, nella vita, vedrai che-

20.02.2026 12:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

sigh

11.02.2026 14:28 πŸ‘ 10536 πŸ” 2576 πŸ’¬ 82 πŸ“Œ 36
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Our paper is out in @natneuro.nature.com!

www.nature.com/articles/s41...

We develop a geometric theory of how neural populations support generalization across many tasks.

@zuckermanbrain.bsky.social
@flatironinstitute.org
@kempnerinstitute.bsky.social

1/14

10.02.2026 15:56 πŸ‘ 273 πŸ” 100 πŸ’¬ 7 πŸ“Œ 1
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New article to read! Myasthenia gravis following the initiation of statin therapy.

➑️ Statin initiation may be associated with increased risk of new-onset MG during the first 6–12 months.

πŸ”— doi.org/10.1111/joim.70072

#MyastheniaGravis #MG #statins

09.02.2026 05:13 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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The paradox of immune systems conservation between prokaryotes and eukaryotes - Nature Reviews Microbiology The widespread prokaryotic immune systems, in particular restriction–modification, CRISPR–Cas and defensive toxin–antitoxin systems, are absent in eukaryotes, whereas relatively rare ones, such as Arg...

The immune systems paradox

Some widespread prokaryotic immune systems are absent in eukaryotes, whereas relatively rare ones became central to eukaryotic innate immunity

@audeber.bsky.social & E. Koonin hypothesize the answer is #HGT

shareable link: rdcu.be/e2EmD

www.nature.com/articles/s41...

06.02.2026 10:22 πŸ‘ 43 πŸ” 18 πŸ’¬ 2 πŸ“Œ 1
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Expansion Microscopy Has Transformed How We See the Cellular World | Quanta Magazine How physically magnifying objects using a key ingredient in diapers has opened an unprecedented view of the microbial world.

Expansion microscopy may be the hi-res hero that many biologists have been craving.

05.02.2026 21:04 πŸ‘ 25 πŸ” 10 πŸ’¬ 0 πŸ“Œ 1
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On the balance of knowledge - Nature Reviews Immunology Ruslan Medzhitov shares his thoughts on the balance between generating data and developing theories in immunology, with a focus on exploring the rules that govern complex systems.

"There are several possible reasons for this unsettling state of affairs" www.nature.com/articles/s41...

05.02.2026 21:04 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

The actual US government should be stopped. I mean, all of this isn't sufficient for an impeachment?

05.02.2026 15:26 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Human autoantibodies against type I interferons in severe viral disease Type I interferons (IFN-Is) are critical antiviral cytokines that restrict viral replication and limit viral disease. A remarkable recent discovery is…

A very nice review on type I IFN autoantibodies:
www.sciencedirect.com/science/arti...

04.02.2026 17:47 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The IL17REL gene encodes a decoy receptor of IL-17 family cytokines to control gut inflammation - Nature Immunology Qian and colleagues show that IL-17REL functions as a decoy receptor to suppress the effects of IL-17 family cytokines and reduce intestinal inflammation.

The IL17REL gene encodes a decoy receptor of IL-17 family cytokines to control gut inflammation

Qi Li et al. πŸ§ͺ

www.nature.com/articles/s41...

03.02.2026 14:33 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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A targeted combination therapy achieves effective pancreatic cancer regression and prevents tumor resistance | PNAS Pancreatic ductal adenocarcinoma (PDAC) has one of the lowest cancer survival rates. Recent studies using RAS inhibitors have opened the door to mo...

Pancreatic cancer is the third deadliest cancer. Treatment often fail due to resistance.

A new study in PNAS led by Mariano Barbacid tackles this with a triple combination therapy that induces robust tumor regression and prevents the onset of tumor resistance in mice.

#SciSky #MedSky #Oncology

31.01.2026 02:50 πŸ‘ 8 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

I'm so sorry for your loss. And also, for this f*ckin authocratic crazy regime in USA. Remember what happened in Italy with blackshirts

24.01.2026 21:39 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Alex Pretti was a colleague at the VA. We hired him to recruit for our trial. He became an ICU nurse- I lover working with him. He was a good kind person who lived to help and these fuckers executed him.

White. Hot. Rage.

24.01.2026 19:31 πŸ‘ 60621 πŸ” 18871 πŸ’¬ 1403 πŸ“Œ 741
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Increased prevalence of #autoantibodies neutralizing IFNΞ»2/3 in young individuals with #CysticFibrosis. New report from Kevin Groen, Emanuela Bruscia, Marc Emmenegger, Benjamin Hale @benhale.bsky.social and colleagues: rupress.org/jhi/article/...

#Autoimmunity #Infections

19.01.2026 14:45 πŸ‘ 9 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
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Not sure this counts as a timeline cleanse but check out the weird little cars I made

17.01.2026 09:29 πŸ‘ 419 πŸ” 65 πŸ’¬ 22 πŸ“Œ 5

It's AI colonialism

17.01.2026 05:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Human genetics guides the discovery of CARD9 inhibitors with anti-inflammatory activity @cellcellpress.bsky.social @thexavierlab.bsky.social @broadinstitute.org
www.cell.com/cell/fulltex...

17.01.2026 05:44 πŸ‘ 14 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
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Exclusive: US gets first $500 million Venezuelan oil deal, holding some proceeds in Qatar The details shared with Semafor mark an initial milestone in the administration’s plan following the ouster of NicolΓ‘s Maduro.

The main bank account holding revenue from the Venezuelan oil sales is located in Qatar.

β€œThere is no basis in law for a president to set up an offshore account that he controls so that he can sell assets seized by the American military,” Sen. Elizabeth Warren.

www.semafor.com/article/01/1...

15.01.2026 04:42 πŸ‘ 23663 πŸ” 10835 πŸ’¬ 1628 πŸ“Œ 1181

It's me

14.01.2026 07:41 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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www.nature.com/articles/s41...

πŸ“– CD19 CAR-T cells for treatment-refractory autoimmune diseases: the phase 1/2 CASTLE basket trial

β€œCASTLE suggests the feasibility, safety and efficacy of Zorpo-cel in three different autoimmune diseases and paves the way for conducting a pivotal study.”
#SLE #CART

10.01.2026 07:14 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0