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Osvaldo Chara

@osvaldo-chara.bsky.social
240 followers 113 following 117 posts

Biophysicist/Modeller playing with tissues in Development and Regeneration School of Biosciences, University of Nottingham

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Reposted by Osvaldo Chara
Loïc A. Royer 💻🔬🧪 @loicaroyer.bsky.social · 06/10/2026
🏁 That's a wrap! The @biohub.org Cell Tracking machine learning challenge on @kaggle.com is over: 4,478 participants, 3,947 teams, 120 countries, 95,438 submissions, tracking every cell of zebrafish embryos. 🧪🔬🧵 kaggle.com/competition... #microscopy
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Reposted by Osvaldo Chara
Sumru Bayin @sumrubayin.bsky.social · 29/09/2026
An exciting milestone for the Bayin lab! Our first PhD thesis submitted! Congratulations @jensbager.bsky.social 🍾🍾 #proudPI 😍 Part of Jens’ PhD work can be found in our latest publication. journals.biologists.com/dev/article/...
journals.biologists.com
A conserved differentiation programme facilitates inhibitory neuron production in the developing mouse and human cerebellum
Summary: Single cell RNA-sequencing establishes core components of the gene regulatory network that drive Nestin-expressing progenitor to inhibitory neuron differentiation in the developing mouse and ...
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Osvaldo Chara @osvaldo-chara.bsky.social · 29/09/2026
Delighted to host the one and only @amartinezarias.bsky.social ! Thanks for visiting us, Alfonso!! Whenever we meet, #Physics and #Biology get closer than ever!!
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Reposted by Osvaldo Chara
Giulia Paci @giuliapaci.bsky.social · 25/09/2026
Last month to apply for ECR places on our workshop on developmental robustness taking place next April. Apply and spread the word, I promise it’s going to be great!
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Osvaldo Chara @osvaldo-chara.bsky.social · 22/09/2026
We've just released StressNET: a machine-learning method that infers the mechanical state of tissues! Check it out! (1/8)
Mechanical stress inference (color-coded, right) from a microscopy image of a zebrafish neuromast (left).
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Reposted by Osvaldo Chara
Development @dev-journal.bsky.social · 18/09/2026
Mechanical feedback coordinates elongation across the notochord This Research Highlight showcases work by Carlos Camacho-Macorra, @osvaldo-chara.bsky.social, @bensteventon.bsky.social and colleagues from @geneticscam.bsky.social. journals.biologists.com/dev/article/...
Enhanced YAP activity in vgll4b mutants increases the contribution of midline progenitors to the notochord. (A) Scheme showing the KikGR photoconversion strategy. Red dashed box highlights the photoconverted region. Red bracket indicates the displacement distance between front of the photoconverted notochord and the front of the fotoconverted floor plate. (B) Confocal images of photoconverted control and mutant embryos at different time points. Scale bars: 100 μm. 0 h post-photoconversion (hpc) corresponds to 18 hpf. Dashed lines highlight the notochord. Yellow brackets indicate displacement distance.
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Reposted by Osvaldo Chara
Ben Steventon @bensteventon.bsky.social · 16/09/2026
Nice commentary Oslvaldo, it was a lot of fun working on this project together!
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Osvaldo Chara @osvaldo-chara.bsky.social · 15/09/2026
🧵 What do zebrafish notochord cells 🐟 and Galilean relativity 🚀 have in common? Quite a lot, apparently. 😄 Check this out in the published version of our article in @dev-journal.bsky.social: doi.org/10.1242/dev.... 1/7
doi.org
Coupling Vgll4b/Yap-regulated posterior cell addition with anterior vacuolation enables robust notochord elongation
Highlighted Article: YAP activation in notochord progenitors of vgll4b mutant zebrafish leads to enhanced progenitor addition to the notochord, compromising the ability of notochord cells to undergo v...
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Reposted by Osvaldo Chara
PLOS Biology @plosbiology.org · 28/08/2026
Neuromesodermal progenitor cells generate multiple tissues. This study by @abinagui.bsky.social @edinuni-irr.bsky.social @osvaldo-chara.bsky.social @cellysally.bsky.social &co maps their functional heterogeneity and links TF expression thresholds to #cellFate. 🧪 #AcademicSky plos.io/4xWA8Ze
3D spatial organization of neural and mesodermal lineages in the developing embryo.

A 3D image projection of a day 7 mouse embryo, stained for neural SOX2 (magenta), mesodermal TBXT (green) and DAPI (blue) revealing the precise spatial organization of neural and mesodermal transcription factors that govern body axis elongation.
Credit: Filip J. Wymeersch
License Agreement: The copyright holder agrees to publish this image under the Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Note: This image was acquired by confocal microscopy. No generative AI was used in data acquisition or processing.
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Reposted by Osvaldo Chara
PLOS Biology @plosbiology.org · 27/08/2026
Neuromesodermal progenitor cells generate multiple tissues. This study by @abinagui.bsky.social @edinuni-irr.bsky.social @osvaldo-chara.bsky.social @cellysally.bsky.social &co maps their functional heterogeneity and links TF expression thresholds to #cellFate. 🧪 #AcademicSky plos.io/4xWA8Ze
3D spatial organization of neural and mesodermal lineages in the developing embryo.

A 3D image projection of a day 7 mouse embryo, stained for neural SOX2 (magenta), mesodermal TBXT (green) and DAPI (blue) revealing the precise spatial organization of neural and mesodermal transcription factors that govern body axis elongation.
Credit: Filip J. Wymeersch
License Agreement: The copyright holder agrees to publish this image under the Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Note: This image was acquired by confocal microscopy. No generative AI was used in data acquisition or processing.
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Reposted by Osvaldo Chara
PLOS Biology @plosbiology.org · 26/08/2026
Neuromesodermal progenitor cells generate multiple tissues. This study by @abinagui.bsky.social @edinuni-irr.bsky.social @osvaldo-chara.bsky.social @cellysally.bsky.social &co maps their functional heterogeneity and links TF expression thresholds to #cellFate. 🧪 #AcademicSky plos.io/4xWA8Ze
3D spatial organization of neural and mesodermal lineages in the developing embryo.

A 3D image projection of a day 7 mouse embryo, stained for neural SOX2 (magenta), mesodermal TBXT (green) and DAPI (blue) revealing the precise spatial organization of neural and mesodermal transcription factors that govern body axis elongation.
Credit: Filip J. Wymeersch
License Agreement: The copyright holder agrees to publish this image under the Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Note: This image was acquired by confocal microscopy. No generative AI was used in data acquisition or processing.
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Reposted by Osvaldo Chara
Anahí Binagui-Casas @abinagui.bsky.social · 26/08/2026
So happy & excited to see our paper out in @plosbiology.org ! 🎉 With contributions from many past & present members of the Lowell & Wilson labs @edinuni-irr.bsky.social , and a fantastic collaboration with @osvaldo-chara.bsky.social & @alberto-ceccarelli.bsky.social. 🧵👇(1/10)
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Osvaldo Chara @osvaldo-chara.bsky.social · 26/08/2026
Curious about how #NMPs generate multiple tissues? 🤔 Check out our latest adventure led by the amazing @abinagui.bsky.social and Val Wilson, together with @mattafrench.bsky.social, @cellysally.bsky.social, @alberto-ceccarelli.bsky.social y.social from our modelling lab and many other colleagues 🙌
y.social
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Osvaldo Chara @osvaldo-chara.bsky.social · 17/08/2026
Are you curious about how the #notochord coordinates its own elongation? We certainly were! Check out this exciting multidisciplinary work spearheaded by Carlos Camacho-Macorra, led by @bensteventon.bsky.social, with modelling from @alberto-ceccarelli.bsky.social and myself. doi.org/10.1242/dev....
doi.org
Coupling Vgll4b/Yap regulated posterior cell addition with anterior vacuolation enables robust notochord elongation
Robust tissue growth control requires long-range communication between the rate of progenitor addition and tissue expansion. However, the regulatory mechanisms that couple these processes are unknown....
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Reposted by Osvaldo Chara
Loïc A. Royer 💻🔬🧪 @loicaroyer.bsky.social · 29/06/2026
1/ 🧬🔬 How does one cell become an entire animal? We can now film it in 3D 🐟, but turning those movies into accurate cell tracks is brutally hard. Enter our new #Kaggle challenge: $60K prize pool, to help crack 3D+time cell tracking at scale! 🧵👇 www.kaggle.com/competitions... @biohub.org
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Osvaldo Chara @osvaldo-chara.bsky.social · 05/06/2026
Check out this amazing conference of Mathematical Biology! Great speakers, venue and city!!
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Osvaldo Chara @osvaldo-chara.bsky.social · 26/05/2026
🧵 New protocol out in @cp-starprotocols.bsky.social! Step-by-step guide to infer forces in tissues using ForSys, by @borgesaugust.bsky.social, Jeronimo Miranda, Alberto Ceccarelli, Guilherme Ventura, @kuba-sedzinski.bsky.social, @hernanlopez-schier.bsky.social and I, www.cell.com/star-protoco...
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Osvaldo Chara @osvaldo-chara.bsky.social · 07/05/2026
Amazing paper in @pnas.org of @yanlanmao.bsky.social lab featuring @giuliapaci.bsky.social and colleagues!!
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Osvaldo Chara @osvaldo-chara.bsky.social · 30/03/2026
Would you like to run our Cellular Potts Model (#CPM) of neuromast regeneration in #zebrafish? It is now available in the amazing @morpheus-lab.bsky.social repository: morpheus.gitlab.io/model/m4377/ Curious about the Science? Check our paper: doi.org/10.1016/j.jt...
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Reposted by Osvaldo Chara
Nature @nature.com · 25/02/2026
Calling all budding science writers! Applications for our paid London-based internship, starting in June, are now open. Deadline: 9 March 2026 Full info here: springernature.wd3.myworkdayjobs.com/en-US/Spring... #PaidInternship #Internship #Journalism
Do you:
Have a strong interest in science?
A passion for journalism and writing? 

Our paid 3-month internship might be for you!

We are looking for talented candidates from all backgrounds, especially those traditionally underrepresented in publishing.

Applications close 9 March 2026.
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Osvaldo Chara @osvaldo-chara.bsky.social · 19/02/2026
Thrilled to share this adventure on how zebrafish elongates its notochord! 🐟 Kudos to Carlos Camacho de la Macorra and @bensteventon.bsky.social for leading it. Alberto Ceccarelli and I had so much fun modelling & uncovering unexpected predictions… A nice mix of maths 📐, computing 💻 & experiments 🔬!
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Reposted by Osvaldo Chara
Dr. Hernán López-Schier @hernanlopez-schier.bsky.social · 01/02/2026
New publication from the lab! Very excited for a the new work in collaboration with Osvaldo Chara. pubmed.ncbi.nlm.nih.gov/41617078/ How do living systems remain stable ? We found a local feedback that acts like a quorum-sensing system, ensuring organs regrow to the right size.
pubmed.ncbi.nlm.nih.gov
Local control of cellular proliferation underlies neuromast regeneration in zebrafish - PubMed
Biological systems are never in equilibrium, yet they maintain stability in the face of continuous external disturbances. A prime example of this is organ regeneration, during which organs are reliably rebuilt through controlled cellular proliferation. In this study, we employ a cell-based computati …
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Osvaldo Chara @osvaldo-chara.bsky.social · 01/02/2026
Curious about how to achieve organ-wide #regeneration through locally controlled cell proliferation? Check out our latest computational adventure addressing this problem in the #neuromast within the #zebrafish lateral line. doi.org/10.1016/j.jt... (1/9)
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Yanlan Mao @yanlanmao.bsky.social · 22/01/2026
Woo hoo! Congratulations Giulia and totally well deserved. So proud!
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Yanlan Mao @yanlanmao.bsky.social · 22/01/2026
Registration and submissions for poster presentations will remain open for a few more weeks: meetings.embo.org/event/26-hom...
meetings.embo.org
Interfacing biophysical and molecular mechanisms of animal homeostasis and repair
The control of animal homeostasis and repair has been studied for decades, mostly from a molecular and biochemical perspective. Recent research shows that biophysical factors, such as mechanical forc…
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Anja Geitmann @geitmannlab.bsky.social · 07/01/2026
OPPORTUNITY: McGill Plant Science is looking for an expert in plant pathology, plant breeding, or horticulture in the context of the Canada Impact+ Research Chairs Program (senior established researcher). Contact: www.mcgill.ca/plant/contact Program: lnkd.in/eavfNu7e Please re-post.
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
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Yanlan Mao @yanlanmao.bsky.social · 22/12/2025
Registration deadline extended to 5th January. Festive greetings!
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the Node @the-node.bsky.social · 19/12/2025
During the #biologists100 conference, the Node's conference reporter @jens-cells.bsky.social spoke with Clare Benson, Luke Simpson and @m-stower.bsky.social. Here, each researcher tells us more about the work that they presented at the conference.👇 thenode.biologists.com/throwback-to...
thenode.biologists.com
Throwback to Biologists @ 100: Interviews from Liverpool - the Node
Earlier this year, The Company of Biologists celebrated its 100-year anniversary with the Biologists @ 100 conference in Liverpool - bringing together
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Alfonso Martinez Arias @amartinezarias.bsky.social · 17/12/2025
Great quote Waddington Seen @DBT_inStem #Embryo #CellsRUs #NotInTheGenes
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Osvaldo Chara @osvaldo-chara.bsky.social · 17/12/2025
Interested in doing an interdisciplinary PhD to elucidate signalling centres that orchestrates limb regeneration? Come to work with the amazing @canaztekin.bsky.social and myself!!
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canaztekin.bsky.social @canaztekin.bsky.social · 17/12/2025
🚨We are recruiting two PhD students 🚨 1) Quantitative & dynamic analysis of limb-regenerative signaling centers w/ @osvaldo-chara.bsky.social 📶🧮💻 🔗https://www.phd.tuebingen.mpg.de/80704/Quantitative-and-dynamic-analysis-of-limb-regenerative-signaling-center-interactions
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Alessandro De Simone @desimonelab.bsky.social · 16/12/2025
Tristan Guyomar and I wrote a review on physical mechanisms coordinating regeneration - Featured: signalling/mechanical gradients, travelling waves and nematic fields - Dramatis personae: axolotls, hydra, planaria, spiny mice and zebrafish (ofc) with a jellyfish cameo tinyurl.com/3upzrdbs
tinyurl.com
Gradients, waves and nematics: quantitative perspectives on regeneration
Regeneration restores a damaged body part to its original size, shape and structure. Research over the last decades identified signaling pathways, cel…
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Yanlan Mao @yanlanmao.bsky.social · 14/12/2025
Final week to register! #EMBOevents
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College of Medicine and Veterinary Medicine, Edinburgh Uni @cmvm-edinburghuni.bsky.social · 02/12/2025
A new research facility dedicated to axolotls, will be opening soon. Hosting the UK’s only dedicated axolotl research colony and will support world class studies into regeneration, ageing, cancer resistance and stem cell biology. edin.ac/4pAAJeW @edinuni-irr.bsky.social @aidarodrigo.bsky.social
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Josh Currie @joshcurrie.bsky.social · 05/12/2025
🚨 Preprint Friday! 🚨 Thrilled to highlight this collab with David Brown at Duke @cutitoutdave.bsky.social and Ken Poss at UW Madison/Morgridge @kenposs.bsky.social. By comparing 3(!!) regenerating models we identify a conserved role for Sp-family TFs in appendage regeneration (and more).....🧵
biorxiv.org
Enhancer-directed gene delivery for digit regeneration based on conserved epidermal factors
Limb loss remains a significant clinical challenge, but regenerative medicine approaches such as gene therapy offer a promising strategy to trigger endogenous regeneration programs. Optimal vector con...
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Katherine Brown @katherine-brown.bsky.social · 02/12/2025
Are you a #devbio postdoc planning to go on the job market in 2026? Then this is the initiative for you! Offering training, networking, mentoring and profile-raising components, Development's PI Programme can give you that extra support you might need while navigating this challenging time...
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James Briscoe @jamesbriscoe.bsky.social · 03/12/2025
Applications are open for @dev-journal.bsky.social 2026 Pathway to Independence (PI) programme, supporting postdocs applying for group leader positions: Mentoring Profile raising Leadership training Network building Spread the word... www.biologists.com/grants/devel...
biologists.com
Development's Pathway to Independence Programme
Our grants support and encourage the sharing of knowledge throughout the community by facilitating international collaboration, event attendance and the organisation of scientific meetings, conference...
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Bipin Pandey @bipinpandey.bsky.social · 02/12/2025
Delighted to be in the EMBO YIP list! @uniofnottingham.bsky.social @uonresearch.bsky.social
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canaztekin.bsky.social @canaztekin.bsky.social · 02/12/2025
🎉 Our deconstructed, stem-cell–based approach to studying signaling centers and limb-development cell types is out! 🥳 So nice to see it in its final form after the preprint— and huge thanks to the community for all the enthusiasm and interest since then! www.science.org/doi/10.1126/...
science.org
Specialized signaling centers direct cell fate and spatial organization in a mesodermal organoid model
Stem cell–derived mesodermal organoids reveal how signaling centers guide cell fate and tissue organization.
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Sainsbury Laboratory Cambridge University (SLCU) @slcuplants.bsky.social · 28/11/2025
Congratulations Elise Laruelle & @robinsonsci.bsky.social on your @acceleratescience.bsky.social - @c2d3.cam.ac.uk funded project "Plant automatic cell lineage reconstruction" More info www.slcu.cam.ac.uk/news/plant-a... Illustration by Elise Laruelle & leaf images by @sainikumud.bsky.social
Graphic depicting the Plant Automatic Cell Lineage Reconstruction project which aims to train a neural network to recognise “sister cells” in mature plant leaves and reconstruct their complete cell division history from a single image.. Illustration by Elise Laruelle and leaf images by Kumud Saini.
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Yanlan Mao @yanlanmao.bsky.social · 28/11/2025
Registration deadline 20th Dec! We have generous travel grants for early career researchers! April is a beautiful time to visit China!
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Katherine Brown @katherine-brown.bsky.social · 27/11/2025
If you’re not aware of BiO’s Fast & Fair initiative, do listen to this podcast or find out more on the website (journals.biologists.com/bio/pages/fa...). We’re trying to tackle two big issues with the peer review process - how to make it quicker & how to recognise the crucial work of peer reviewers
journals.biologists.com
Biology Open | The Company of Biologists
Biology Open | The Company of Biologists Fast & Fair peer review A new initiative offering high-quality peer review within 7 working days of submission Biology Open (BiO) has embar...
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Bipin Pandey @bipinpandey.bsky.social · 27/11/2025
Delighted to share this latest manuscript @nature.com Ethylene regulating root cell wall mechanics in compacted soil in collaboration with Wanqi and Staffan Persson @uniofnottingham.bsky.social @ukri.org @uonresearch.bsky.social @lucas-de-lion.bsky.social @osvaldo-chara.bsky.social rdcu.be/eR4or
rdcu.be
Ethylene modulates cell wall mechanics for root responses to compaction
Nature - Soil compaction traps ethylene around roots, which causes transcriptional upregulation of Auxin Response Factor1, resulting in decreased root cortical cell wall thickness and thereby...
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Osvaldo Chara @osvaldo-chara.bsky.social · 26/11/2025
Thrilled to have contributed to this @nature.com study on ethylene and cell wall mechanics in root compaction responses!! — Featuring Jiao Zhang, Lucas Peralta Ogorek, @borgesaugust.bsky.social , Bipin Pandey, Staffan Persson, Wanqi Zhang, Malcolm Bennett & more!! www.nature.com/articles/s41...
nature.com
Ethylene modulates cell wall mechanics for root responses to compaction - Nature
Soil compaction traps ethylene around roots, which causes transcriptional upregulation of Auxin Response Factor1, resulting in decreased root cortical cell wall thickness and thereby promoting root ra...
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Alfonso Martinez Arias @amartinezarias.bsky.social · 20/11/2025
Looking forward to my visit to Fac Biologicas @ucm.es (biologicas.ucm.es) in #Madrid, my alma mater, where I studied (and dreamt) 50 years ago!
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Crystal Rogers, PhD @rogerslabucd.bsky.social · 12/11/2025
Are you a postdoc or Asst. Prof on the job market? Check out our listing and consider applying! The search is very broad and it’s in a great department, location, university! Even with the crazy schedule that comes with being a PI- I love my job @ucdavis.bsky.social @ucdavisvetmed.bsky.social!
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Joaquina Delas @joadelas.bsky.social · 12/11/2025
We have a new lab photo. Busy times in the Delas Lab! Last month Maria and Shaun joined us to start their PhDs. Learn more about our research and our team: delaslab.com We will be recruiting another postdoc next year so have a look through our recent work and get in touch if you are interested.
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epithelial mechanics fan club @epimechfc.bsky.social · 08/11/2025
About stress inference bsky.app/profile/epim...
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epithelial mechanics fan club @epimechfc.bsky.social · 21/11/2024
📚 Welcome to the Epithelial Mechanics Fan Club! 🌟 We're all about sharing research papers and threads. If you'd like to contribute, please send DM us! 💬 Our goal is to build a community that fosters knowledge sharing. Explore our previous 🧵 here 👇
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kuba sędziński @kuba-sedzinski.bsky.social · 03/11/2025
We are looking for: PhD Student (starting as Research Assistant) and Postdoctoral Researcher in Stem Cell Biology and Mechanobiology. Please RT💕 🔗 About our lab: renew.science/principal_in... 🎓 PhD position: jobportal.ku.dk/phd/?show=15... 🧪 Postdoc position: jobportal.ku.dk/videnskabeli...
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