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Jacob Smith

@jacobsmithsci.bsky.social
931 followers 1K following 30 posts

PI @UniBarcelona @IBUB_UB. sites.google.com/view/smithlab-ibub… Circadian clocks and inter-organ crosstalk.

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Jacob Smith @jacobsmithsci.bsky.social · 23/07/2026
Please consider this exciting opportunity to join the lab of Thomas Mortimer @VHIR , Barcelona! www.linkedin.com/posts/thomas...
linkedin.com
Laboratory Manager (Circadian Rhythms and Ageing Laboratory) - VHIR | Thomas Mortimer
Applications are now open for the role of Laboratory Manager here at the Circadian Rhythms and Ageing laboratory! We are searching for an experienced researcher who will help to ensure a seamless da...
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Sdelci Lab @sdelcilab.bsky.social · 06/03/2026
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.
nature.com
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...
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Jacob Smith @jacobsmithsci.bsky.social · 13/02/2026
🧪 Very happy to have our story out in Journal of Biological Rhythms! In collaboration with Lab of Kevin Koronowski (UTHSA), we show that the liver clock regulates 24h transcriptional rhythms in skeletal muscle via serum-based signalling. pubmed.ncbi.nlm.nih.gov/41486525/. Thanks to all authors! 🙏
This graphical abstract summarizes the role of the liver circadian clock in regulating skeletal muscle metabolism through endocrine signaling. In wild-type (WT) mice, the liver clock is intact (functional), whereas in hepatocyte-specific Bmal1 knockout mice (Bmal1hep−/−) the liver clock is disrupted (core clock rhythms completely absent). RNA-sequencing analysis of skeletal muscle shows that deletion of the liver clock does not alter the core molecular clock machinery in muscle but modifies the rhythmic expression of metabolic genes, particularly those associated with mitochondrial and lipid metabolism.

To investigate whether this regulation occurs through circulating factors, serum collected from WT or Bmal1hep−/− mice during different circadian phases was applied to cultured skeletal muscle myotubes. RNA-sequencing of myotubes revealed that serum from Bmal1hep−/− mice, particularly during the dark phase (ZT16), reduces the expression of oxidative phosphorylation and other mitochondrial genes compared with WT serum. Functional assessment demonstrated that treatment with Bmal1hep−/− serum decreases mitochondrial respiration and ATP production in myotubes.

Together, these findings illustrate that the liver circadian clock communicates with skeletal muscle through blood-borne signals to fine-tune muscle metabolic gene expression and mitochondrial function without directly altering the intrinsic muscle clock. This endocrine liver–muscle signaling axis highlights a mechanism by which peripheral clocks coordinate systemic metabolism across tissues.
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Chris MacQuarrie @cmacquar.bsky.social · 14/01/2026
Peer Review is broken because a generation of Editors were trained that peer review is sacrosanct. Thus we have Editors who are clerks, sending and re-sending manuscripts to reviewers until they are happy. That's not the job. Be an Editor, not a clerk. Use your skill and judgement. Make decisions.
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Sdelci Lab @sdelcilab.bsky.social · 30/07/2025
🚀 We’re excited to share our latest publication in collaboration with Verena Ruprecht's group at @crg.eu Mechanobiology meets Nuclear Metabolism www.nature.com/articles/s41...
nature.com
Mitochondria-derived nuclear ATP surge protects against confinement-induced proliferation defects - Nature Communications
The authors uncover a mechano-metabolic adaptation where confinement induces rapid mitochondrial relocalization to the nuclear periphery, generating localized nuclear ATP surges that support chromatin...
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Jacob Smith @jacobsmithsci.bsky.social · 22/07/2025
🧪 Really cool new #circadian paper looking at the role of the liver clock in inter-organ crosstalk with muscle during Cachexia "Functional liver genomics identifies hepatokines promoting wasting in cancer cachexia": Cell www.cell.com/cell/fulltex...
cell.com
Functional liver genomics identifies hepatokines promoting wasting in cancer cachexia
Cancer-induced liver changes promote body wasting through secreted factors, with circadian regulators and hepatokines being important contributors to cancer cachexia.
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Jacob Smith @jacobsmithsci.bsky.social · 23/06/2025
Part time (20h per week) technician/predoc position available in my lab at the University of Barcelona 🧬⏰ studying circadian rhythms & inter-organ crosstalk. Starts 1st Sept 2025. Contact via email link in website (sites.google.com/view/smithla...) for more info #ScienceJobs #Barcelona #Circadian
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Jacob Smith @jacobsmithsci.bsky.social · 14/06/2025
🧪 Encouraging to see people standing up against tyranny and fascism in the US. The Trump administration’s anti-science and pro-war agenda isn’t just dangerous at home — it threatens progress and stability worldwide. Enough!
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Carl T. Bergstrom @carlbergstrom.com · 05/06/2025
The failure of the National Academy of Sciences USA to make a clear and unequivocal statement about the disastrous Trump administration science policies — it lets all of us down and dooms them to eventual irrelevance.
arstechnica.com
US science is being wrecked, and its leadership is fighting the last war
Facing an extreme budget, the National Academies hosted an event that ignored it.
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Philip Ball @philipcball.bsky.social · 08/03/2025
US science folks: it's been really heartening to see all the Stand Up For Science posts. Thank you for showing the backbone and resolve that most institutions have lacked.
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Jacob Smith @jacobsmithsci.bsky.social · 07/03/2025
Great to see US scientists protesting in response to the insanity that is the US "government" right now. @standupforscience.bsky.social 🧪
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Alexis A. Jourdain @jourdainlab.bsky.social · 30/01/2025
New preprint from the lab! 🚨 🧫 New galactose #CRISPR screening strategy 🎯 481 genes required for #OXPHOS ⚙️ #FAM136A in IMS proteostasis 👂Mito defects in #Menieres disease by @marcellharhai.bsky.social @fbm-unil.bsky.social A short thread 1/5 www.biorxiv.org/content/10.1...
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Eric Topol @erictopol.bsky.social · 05/01/2025
As we age, our circadian clock goes off-track, which may contribute to age-related diseases. A new review paper gets into the mechanisms and potential ways to prevent the decline www.nature.com/articles/s41...
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Jacob Smith @jacobsmithsci.bsky.social · 03/01/2025
🧪 ✍️ Please check out our new review on intercellular and interorgan communication between circadian clocks ⏰🧬 out today in Nature Reviews Molecular Cell Biology 🎉 @natrevmcb.bsky.social ! Here is the SharedIt link for free access: rdcu.be/d5ppE
rdcu.be
Circadian clock communication during homeostasis and ageing
Nature Reviews Molecular Cell Biology - Communication between the circadian clocks of different cell and tissue types supports the daily rhythms of homeostatic processes that maintain bodily...
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Jacob Smith @jacobsmithsci.bsky.social · 06/12/2024
Wow, this is quite wild!
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Itai Yanai @itaiyanai.bsky.social · 30/11/2024
It seems easy to make fun of basic science – for example why would you want to study bacterial immune systems? But then you would have to admit that that’s exactly what led to the discovery of using CRISPR as an insanely good technology for genome engineering.
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Jacob Smith @jacobsmithsci.bsky.social · 26/11/2024
Wow, this is cool. Non natural cis elements designed in silico that are more effective than natural
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Nicholas Per Huffeldt @nphuffeldt.bsky.social · 25/11/2024
If you just moved to BlueSky and interested in #chronobiology, find some of your community here! Want to be added? Reply with evidence your work relates to chronobiology. go.bsky.app/Sw8L4aS With all the new people coming over, I’ll repost weekly for the next month or so. 🧪 🌍 🦑 #EvoBio
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Sdelci Lab @sdelcilab.bsky.social · 22/11/2024
This month we published 2 MANUSCRIPTS in @natureportfolio.bsky.social , nature communication 1. Natalia Pardo discovers the role of nuclear MTHFD2 in centromere stability 2. Espinar and Garcia-Cao reveal the role of nuclear IMPDH2 in the DNA damage response. Nuclear Metabolism is on 🔥
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MwahahahahahadScientist @mads100tist.bsky.social · 24/11/2024
Optimist: The cup is half full Pessimist: The cup is half empty Molecular biologist: I forgot to add the primers to the cup
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Jonas Wietek @jwietek.bsky.social · 22/11/2024
Hey @biorxivpreprint.bsky.social, I think you need to add another icon here 🦋
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Jacob Smith @jacobsmithsci.bsky.social · 21/11/2024
🧪 Word cloud from papers to date. I'd say it sums up my research focus pretty well! (scholargoggler.com). Thanks to a post from ‪@mojoshark.bsky.social‬ for the idea
word cloud showing research focus of Jacob Smith. Main words are circadian, clock, liver, muscle, metabolic
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Jalees Rehman @jalees.bsky.social · 21/11/2024
Cellular ATP demand creates metabolically distinct subpopulations of mitochondria www.nature.com/articles/s41...
nature.com
Cellular ATP demand creates metabolically distinct subpopulations of mitochondria - Nature
Mitochondria are able to maintain two competing metabolic pathways—oxidative phosphorylation and the reductive synthesis of proline and ornithine—by generating two mitochondrial subpopulations that ar...
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Universitat de Barcelona @ub.edu · 20/11/2024
#UniBarcelona | 💙 Estrenem perfil en aquesta xarxa social i us animem a seguir-nos-hi! 📱 La #UniBarcelona ha deixat de publicar a X per marcar distàncies amb un espai on es fomenten missatges d’odi i prolifera la desinformació. Llegeix el comunicat 👉 web.ub.edu/web/actualit...
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Jacob Smith @jacobsmithsci.bsky.social · 18/11/2024
It was great to speak at the Muscle, Exercise and Health symposium last week @InstitutCochin in Paris. A fantastic meeting! Thanks to the organisers and speakers- including keynotes Bente Pedersen, Helen Blau and Marco Sandri for amazing talks. #muscle #circadian #aging
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Itai Yanai @itaiyanai.bsky.social · 17/11/2024
The backbone of academia has always been ‘middle-class labs’ (as David Glanzman puts it): those medium-sized labs with reasonable funding and a dream of making a big discovery.
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Jacob Smith @jacobsmithsci.bsky.social · 17/11/2024
Agree 100%
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Jacob Smith @jacobsmithsci.bsky.social · 16/11/2024
🧪 hopefully now this enters the science feed 😊
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Dave Sayers @davesayers.eurosky.social · 15/11/2024
Academia runs on contacting other academics out of the blue and saying HEY do you wanna do this COOL THING for essentially NO REWARD and equally certainly NO RECOGNITION from your employer and those people going OH MAN that sounds AWESOME sign me up for the COOL NO REWARD NO RECOGNITION EXPERIENCE.
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Jacob Smith @jacobsmithsci.bsky.social · 16/11/2024
🧪 ⏰️ Are you looking to start a PhD? Interested in circadian rhythms & inter-organ crosstalk? Up for living in Barcelona? (who isnt?). If 3 yeses, get in touch via my website (link in bio). Shares appreciated 🙏 #science #circadian #interorgan #metabolism #liver #muscle #PhD #newPI
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