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Osvaldo Contreras

@osvaldoics.bsky.social
354 followers 484 following 42 posts

Cell Identity + Cell Cycle Networks + Chromatin Dynamics & DevEvo in Human Development 🧬 @UNSWMedicine | #MyoTwitter 📝 @Prelights #eLifeAmbassador

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Reposted by Osvaldo Contreras
Computational and Structural Biotechnology Journal (CSBJ) @csbj.org · 26/08/2026
🔗 A Scalable MNase-seq Framework for Reproducible Nucleosome Profiling across Pluripotent Stem Cell and Cardiomyocyte Models. doi.org/10.34133/csb... 📚 CSBJ - A Science Partner Journal: spj.science.org/journal/csbj @victorchang.edu.au @csbj.org @spjournals.bsky.social @aaas.org #ChromatinBiology
A Scalable MNase-seq Framework for Reproducible Nucleosome Profiling across Pluripotent Stem Cell and Cardiomyocyte Models. Computational and Structural Biotechnology Journal (CSBJ). DOI: https://doi.org/10.34133/csbj.0204

CSBJ - A Science Partner Journal: https://spj.science.org/journal/csbj
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Osvaldo Contreras @osvaldoics.bsky.social · 27/08/2026
Thanks for highlighting our most recent paper 📝
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Reposted by Osvaldo Contreras
Osvaldo Contreras @osvaldoics.bsky.social · 06/08/2026
🫀 First successful nucleosome footprinting in cardiomyocytes and end-to-end MNase-seq framework, to our knowledge. Our MNase-seq tracks nucleosome organisatio in pluripotent stem cells at base-pair resolution. 🧬 (1/3)
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Reposted by Osvaldo Contreras
Angela Andersen @angelaandersen.bsky.social · 01/08/2026
Kudos to @science.org for this self-analysis of the peer review process. These kind of data are never shared and don't have to be. Wildly refreshing to see it out in the open. Editorial and peer review dynamics at elite general science journals | Science Advances www.science.org/doi/10.1126/...
science.org
Editorial and peer review dynamics at elite general science journals
Analyses of deidentified data reveal complex interactions that quantify success at elite general science journals.
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Osvaldo Contreras @osvaldoics.bsky.social · 06/08/2026
🫀 First successful nucleosome footprinting in cardiomyocytes and end-to-end MNase-seq framework, to our knowledge. Our MNase-seq tracks nucleosome organisatio in pluripotent stem cells at base-pair resolution. 🧬 (1/3)
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Reposted by Osvaldo Contreras
Rippling Ideas @ripplingideas.bsky.social · 26/06/2026
The qed 1% club controversy highlights a difficult road ahead for openRxiv as they embark on the next decade of trying to bring about a bigger preprint ecosystem. But it also raises questions about the motivations of some open science "advocates"
ripplingideas.org
The 1% club and the rocky road ahead for bioRxiv
The recent launch of qed's "top 1%" preprint ranking has sparked controversy, with concerns about its arbitrary nature, potential harm to authors, and low-quality inclusions. While the tool aims to provide valuable feedback, backlash against qed and its partnership with bioRxiv highlights the challenges and complexities within the evolving preprint landscape and academic community.
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Reposted by Osvaldo Contreras
Francoise Helmbacher @fhelmbacher.bsky.social · 25/04/2026
Delighted to share a new preprint from the lab: Fat1 deletion enhances Fibro-Adipogenic Differentiation and Adipogenic expansion following injury in skeletal muscle doi.org/10.64898/202... #Myoblue #FAPs #IMAT #muscleregeneration #adipogenesis #skeletalmuscle
Regenerating muscle with muscle fibers in white (Phalloidin), adipocytes in red (perilipin), and Pdgfra-derived lineage in green (YFP)
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Osvaldo Contreras @osvaldoics.bsky.social · 12/06/2026
📖New preprint from my team🤩 A scalable MNase-seq framework for reproducible nucleosome profiling across pluripotent stem cell and cardiomyocyte models A data-driven project where we’ve provided the code of nucleosome dynamics and footprinting @victorchang.edu.au www.biorxiv.org/content/10.6...
biorxiv.org
A scalable MNase-seq framework for reproducible nucleosome profiling across pluripotent stem cell and cardiomyocyte models
Micrococcal nuclease (MNase) digestion is widely used to profile chromatin accessibility and nucleosome footprinting. However, its application is often limited by sensitivity to reaction conditions, h...
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Reposted by Osvaldo Contreras
Virtual Gastrulation Zoom Talks @vgzt2021.bsky.social · 08/06/2026
☀️ Join us this week for another great Eastern VGZT session! 🗓️ Wednesday, June 10th ⏰ 9:00 BST / 10:00 CEST / 13:30 IST / 17:00 JST / 18:00 AEST Our speakers are: 👉 Ksenia Skvortsova (@kseskv.bsky.social) 👉 Osvaldo Contreras (@osvaldoics.bsky.social) See you there! 👋
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Reposted by Osvaldo Contreras
Victor Chang Cardiac Research Institute @victorchang.edu.au · 27/02/2026
Congratulations @osvaldoics.bsky.social on being awarded a MAWA/RFF Research Grant - supporting his project Animal Free Human Stem Cell Models to Investigate Congenital Heart Defects. Grateful to the MAWA Trust and the Rozzoli Family Fund for supporting this work.
Congratulations Dr Osvaldo Contreras
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Reposted by Osvaldo Contreras
Zebrafish Rock! @zebrafishrock.bsky.social · 21/01/2026
ICYMI 🔗: www.biorxiv.org/content/10.6...
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Osvaldo Contreras @osvaldoics.bsky.social · 18/01/2026
I’m back here to share our new pre-print! 🔬 🧬 😃 Proteo-transcriptomics and morphometrics of teleost cardiac cells define regulatory networks and exercise-induced cardiomyocyte hypertrophy and hyperplasia Flow cytometry+Imaging+RNA-seq+Proteomics Preprint available on bioRxiv [link in comments]
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Reposted by Osvaldo Contreras
Prof Deepak Modi @drdeepaknmodi.bsky.social · 15/12/2025
Fantastic insights on how replication stress drives cell differentiation by Osvaldo Contreras at the joint meeting of the #InSDB and International Society of Differentiation #ISD joint meeting at #IISER_BERHAMPUR @osvaldoics.bsky.social #INSDBISD2025
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Victor Chang Cardiac Research Institute @victorchang.edu.au · 10/12/2025
Star #Scientist @osvaldoics.bsky.socia is uncovering how hearts grow - and what goes wrong when they don’t. He's mapping the molecular ‘blueprint’ of heart cells to uncover the mechanisms that could one day help damaged hearts repair themselves:
victorchang.edu.au
Star Scientist - Dr Osvaldo Contreras
The Institute's Dr Osvaldo Contreras's work could one day help children born with heart defects and adults facing heart failure live longer, healthier…
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Osvaldo Contreras @osvaldoics.bsky.social · 03/12/2025
Thank you for the highlight @ishr-aus.bsky.social 🙏🏼❤️
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Tony Cesare @thecesarelab.bsky.social · 03/12/2025
New @natcomms.nature.com paper today from Tracy Bryan's lab @cmri.bsky.social: "Nuclear actin and DNA replication stress regulate telomere maintenance by telomerase". Happy our lab could play a small part. Congrats Tracy, Ash Harman, Noa Lamm and the whole team. www.nature.com/articles/s41...
nature.com
Nuclear actin and DNA replication stress regulate telomere maintenance by telomerase - Nature Communications
Telomerase recruitment to telomeres is a tightly regulated process which is stimulated by replication stress. Here, the authors identify that nuclear filamentous actin is important for interaction bet...
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Reposted by Osvaldo Contreras
Victor Chang Cardiac Research Institute @victorchang.edu.au · 03/12/2025
💡Dr Osvaldo Contreras’s funds will allow for open access publication of “OpenEMMU: A versatile, open-source EdU multiplexing methodology for studying DNA replication and cell cycle dynamics” in iScience.
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Nature @nature.com · 26/11/2025
“There were some cells in there that were very messed up” In a technological tour-de-force, researchers have sequenced the whole genomes of more than 100 individual cells from one 74-year-old man go.nature.com/44yj4MN
go.nature.com
We are all mosaics: vast genetic diversity found between cells in a single person
Technical advances allow researchers to trace the genetic changes that occur over time.
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Reposted by Osvaldo Contreras
Cell Reports @cp-cellreports.bsky.social · 12/11/2025
In vivo differentiation of embryonic cells devoid of key reprogramming factors
dlvr.it
In vivo differentiation of embryonic cells devoid of key reprogramming factors
Youlten, Miao et al. use zebrafish transplantation to understand the fate of cells lacking pluripotency factors Nanog, Pou5f3, and Sox19b (NPS) in developmental reprogramming and cell identity establishment. They found that NPS are required for proper cell identity for most, but not all, lineages, likely through nuclear and cytoplasmic reprogramming.
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Reposted by Osvaldo Contreras
Differentiation Journal @diffjournal.bsky.social · 07/11/2025
One week left to register! Join the Editors-in-Chief of Differentiation on November 14 at 12:00 p.m. Central for a virtual seminar with Pavani P. Perera on the enteric nervous system, evolution, and cave fish. Register for free: bit.ly/4oaU71P Topic: bit.ly/478UZhu
Biological Differentiation Across the Scales • November 14, 2025, at 12:00 p.m. Central • Register Now
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Reposted by Osvaldo Contreras
Society for Developmental Biology @socdevbio.bsky.social · 13/11/2025
Save the date! @isscr.org, @alleninstitute.org & @socdevbio.bsky.social are collaborating to present a 3-day scientific symposium led by early-career scientists. The Stem Cell & Developmental Biology Early Career Symposium will be held September 23-25, 2026 in Seattle, WA. Learn more: bit.ly/4p98dkv
Stem Cell & Developmental Biology Early Career Symposium
September 23-25, 2026
Seattle, Washington, USA
Planning Committee: Alessandro Bertero, Ken Cho, Gideon Dunster, Whitney Edwards, Evan Graham, Valentina Greco, Leigh Harris, Serge Parent, Helen Willsey
Allen Institute logo; International Society for Stem Cell Research logo; Society for Developmental Biology logo
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Reposted by Osvaldo Contreras
the Node @the-node.bsky.social · 12/11/2025
Catch up on the recordings from our October #DevPres webinar on development across scales. View the presentations from @osvaldoics.bsky.social and @yinanwan.bsky.social. thenode.biologists.com/catch-up-on-...
thenode.biologists.com
Catch up on Development presents… webinar on development across scales - the Node
Our October webinar featured two early-career researchers working on development across scales. Here, we share the talks from Osvaldo Contreras (Victor
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Reposted by Osvaldo Contreras
Chris Wells @stemcellsystems.bsky.social · 19/10/2025
Transitions is the newest in our series of stem cell conversations. Launched by Ritika Saxena, Jarmon Lees and @osvaldoics.bsky.social we explore project and career transitions. All the parts needed for successful science that don't make it to the bench. For Aussie scientists, but all welcome.
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Reposted by Osvaldo Contreras
Chris Wells @stemcellsystems.bsky.social · 19/10/2025
We are celebrating 5 years of the Australia stem cell conversation! Hosted by @unimelb.bsky.social and @asscr.bsky.social the stem cell conversation is a weekly 30min virtual seminar series organised by EMCR for EMCR. Join the first 'transitions' episode Leadership through Service: 11am AEST Wed.
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Osvaldo Contreras @osvaldoics.bsky.social · 30/09/2025
I’m very excited to be invited to present at “Development Presents…” Thanks @amjeve.bsky.social
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Osvaldo Contreras @osvaldoics.bsky.social · 30/09/2025
Remarkable conference organized by @asbmbaus.bsky.social up in Brisbane at the University of Queensland. I was invited to present my latest work as a Keynote Speaker for the Multi-Sonic’s session, and so many thanks for selecting me! Truly an honour!
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Reposted by Osvaldo Contreras
Allegra Angeloni @angeloniallegra.bsky.social · 19/09/2025
SAVE THE DATE! Join us for the 2025 @anzscdb.bsky.social NSW Branch Cell & Developmental Biology Symposium at the Garvan Institute @garvaninstitute.bsky.social on Wed 5 Nov 2025. Keynote speakers include Dougall Norris, @katequinlan.bsky.social, Silvia Velasco and @ryanlister.bsky.social 🔬🧠🧫
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Osvaldo Contreras @osvaldoics.bsky.social · 05/09/2025
Honored to present at @ramacgenomics.bsky.social @unsw.edu.au next Tuesday.😃
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Martin Smith @martinalexsmith.bsky.social · 05/09/2025
Don't miss @osvaldoics.bsky.social in the flesh next Tuesday in Sydney
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Reposted by Osvaldo Contreras
Victor Chang Cardiac Research Institute @victorchang.edu.au · 01/09/2025
We're proud to share Dr Osvaldo Contreras has been awarded a Scale Biosciences Core Lab Grant, from @garvaninstitute.bsky.social Genomics Platform, Scale Biosciences, and Integrated Sciences to further his research into the origins of congenital heart disease that affects one in 100 babies.
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Osvaldo Contreras @osvaldoics.bsky.social · 02/09/2025
Thrilled to share our new paper: "OpenEMMU: A versatile, open-source EdU multiplexing methodology for studying DNA replication and cell cycle dynamics"! We've developed a new resource that make this crucial research more accessible, accurate, powerful and low-cost. www.cell.com/iscience/ful...
cell.com
OpenEMMU: A versatile, open-source EdU multiplexing methodology for studying DNA replication and cell cycle dynamics
Biochemistry; Cell biology; Developmental biology; Computational bioinformatics
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Nitzan Gonen @nitzan-gonen.bsky.social · 27/07/2025
1/n Very excited to share our recent paper published on @ScienceAdvances where we dissect the gene regulatory landscape guiding mouse sex determination! science.org/doi/10.1126/... A huge well done to @IsabelleStevant.genomic.social.ap.brid.gy, Meshi and Elisheva who spearhead this project!
science.org
The gene regulatory landscape driving mouse gonadal supporting cell differentiation
Multiomics analysis revealed the regulatory elements and transcription factors responsible for gonadal sex determination.
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Reposted by Osvaldo Contreras
Jeff Farrell @jeffreyafarrell.bsky.social · 13/06/2025
If you love Daniocell, but wish it could generate analyses specific to YOUR genes & cell types of interest, check out DaniocellDesktop - a new point-and-click app for Mac and Windows that enables reanalysis of the Daniocell data without programming: daniocell.nichd.nih.gov/desktop/ (1/4)
DaniocellDesktop logo, depicting a fish on a laptop screen.
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Osvaldo Contreras @osvaldoics.bsky.social · 11/06/2025
www.science.org/doi/10.1126/... Worth reading
science.org
In defense of silly science
A biologist pushes back against attacks on curiosity-driven research
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Osvaldo Contreras @osvaldoics.bsky.social · 05/06/2025
What’s potentially the first multi-omics study out there? Find it below. This represents a major step forward into what’s later defined as personalised medicine. Personal Omics Profiling Reveals Dynamic Molecular and Medical Phenotypes: Cell www.cell.com/cell/fulltex...
cell.com
Personal Omics Profiling Reveals Dynamic Molecular and Medical Phenotypes
A personalized medicine pilot study samples a patient's transcriptome, proteome, and metabolome multiple times over the course of 14 months and integrates this information with whole-genome sequence d...
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Osvaldo Contreras @osvaldoics.bsky.social · 09/05/2025
So happy about presenting our Pan-Omics work next week!🎉 Thanks for the invite👨🏽‍🔬🙏🏽❤️
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Osvaldo Contreras @osvaldoics.bsky.social · 07/05/2025
📢 Today! National Stem Cell Conversations 🔬 Regulation of Patterning Qi Zhang: "Molecular mechanisms of epigenetic regulation" Adrienne Sullivan: "Early GATA3 activity mediates lineage commitment and patterning in human gastrulation" 📅 Wednesday, 7th May 2025 ⏰ Time: 11:00 AM - 11:30 AM AEST
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Osvaldo Contreras @osvaldoics.bsky.social · 26/04/2025
www.science.org/doi/10.1126/... Fantastic technological progress!
science.org
Deep-tissue transcriptomics and subcellular imaging at high spatial resolution
Limited color channels in fluorescence microscopy have long constrained spatial analysis in biological specimens. We introduce cycle hybridization chain reaction (cycleHCR), a method that integrates m...
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Osvaldo Contreras @osvaldoics.bsky.social · 10/04/2025
FACS-assisted separation of cells for untargeted proteomics. Working with 10,000 cells per experiment to reveal the proteome of these, using low-input omics👨🏽‍🔬🔭 Thanks to all who make our research possible 🙏🏽✨ @victorchang.edu.au @garvaninstitute.bsky.social
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Osvaldo Contreras @osvaldoics.bsky.social · 29/03/2025
www.science.org/doi/10.1126/...
science.org
The emergence of human primordial germ cell–like cells in stem cell–derived gastruloids
3D human gastruloids mimic gastrulation and postgastrulation development, forming the three germ layer derivatives and hPGCLCs.
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Osvaldo Contreras @osvaldoics.bsky.social · 17/03/2025
A Piece of Art! A simple 2.5% Agarose gel with so much information in it. Fundamental science blows my mind, always 🤯❤️
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Osvaldo Contreras @osvaldoics.bsky.social · 28/02/2025
Third paper submitted of the year 🎉 Extremely grateful to my team and colleagues for the daily fundamental discoveries that pave the way for impact and translation 🙏🏽 Fingers crossed for their consideration and smooth revisions
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Osvaldo Contreras @osvaldoics.bsky.social · 22/01/2025
🚀 Open Science can’t wait! I’m thrilled to share our latest preprint: 𝐎𝐩𝐞𝐧𝐄𝐌𝐌𝐔! 🔬 𝐎𝐩𝐞𝐧𝐄𝐌𝐌𝐔: A versatile, open-source EdU multiplexing methodology for understanding DNA replication and cell cycle dynamics 🔗 Read the preprint here: biorxiv.org/content/10.1... #OpenEMMU #DNAReplication #CellCycle
biorxiv.org
OpenEMMU: a versatile, open-source EdU multiplexing methodology for studying DNA replication and cell cycle dynamics
5-Ethynyl-2’-deoxyuridine (EdU) has transformed DNA replication and cell cycle analyses through fast and efficient click chemistry detection. However, commercial EdU kits are expensive, contain propri...
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Osvaldo Contreras @osvaldoics.bsky.social · 22/01/2025
🚀 Open Science can’t wait! I’m thrilled to share our latest preprint: 𝐎𝐩𝐞𝐧𝐄𝐌𝐌𝐔! 🔬 𝐎𝐩𝐞𝐧𝐄𝐌𝐌𝐔: A versatile, open-source EdU multiplexing methodology for understanding DNA replication and cell cycle dynamics 🔗 Read the preprint here: biorxiv.org/content/10.1... #OpenEMMU #DNAReplication #CellCycle
biorxiv.org
OpenEMMU: a versatile, open-source EdU multiplexing methodology for studying DNA replication and cell cycle dynamics
5-Ethynyl-2’-deoxyuridine (EdU) has transformed DNA replication and cell cycle analyses through fast and efficient click chemistry detection. However, commercial EdU kits are expensive, contain propri...
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Reposted by Osvaldo Contreras
Tatiana Moiseeva @tat1anamoiseeva.bsky.social · 10/01/2025
Fascinating paper! No G2/M checkpoint for under-replicated cells! academic.oup.com/nar/article/...
academic.oup.com
Cell cycle progression of under-replicated cells
Abstract. Cell cycle checkpoints are the regulatory mechanisms that secure the strict order of cellular events for cell division that ensure genome integri
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@PhysGenCenter @physgencenter.bsky.social · 10/01/2025
Today in Science Advances: "Chromatin Conformation, Gene Transcription, and Nucleosome Remodeling as an Emergent System" in which CPGE researchers demonstrate that the human genome is an emergent, self-assembling, reinforcement learning system. #chromatin #genomics www.science.org/doi/10.1126/...
science.org
Chromatin conformation, gene transcription, and nucleosome remodeling as an emergent system
Gene transcription is an emergent phenomenon of packing domain geometry in situ.
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Science Magazine @science.org · 07/01/2025
Light can influence metabolism independent of the circadian clock, according to a new #ScienceAdvances study in mice. Learn more: scim.ag/3DIu7bP
scim.ag
Light modulates glucose and lipid homeostasis via the sympathetic nervous system
Light exerts circadian-independent effects on glucose and lipid metabolism.
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Osvaldo Contreras @osvaldoics.bsky.social · 23/12/2024
Grateful for our collaboration with @sarah_e_hancock & Nigel Turner's Lab! 🎉 Proud to have contributed my expertise in lipid droplet biogenesis to this study💡 "Targeting de novo lipogenesis improves gemcitabine efficacy in pancreatic ductal adenocarcinoma" www.biorxiv.org/content/10.1...
biorxiv.org
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Osvaldo Contreras @osvaldoics.bsky.social · 05/12/2024
Thrilled to share my contribution to the December issue of the Australian Biochemist! In this issue, we reflect on the enriching experience of participating in the Young Scientist Program 2024 (#YSP2024) at Biomolecular Horizons. 🔗 Read more here: lnkd.in/gbA7Hf_E
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Helen Bevan @helenbevan.bsky.social · 04/12/2024
Collaboration & co-creation aren't the same thing. If we want to do things differently in future, collaboration (working with others who might not share our goals) isn't enough. People need to be near the creation process (co-creation) to work in creative ways. lnkd.in/gA2sB4Z9. By Dennis Hambeukers
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