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Posts by Juan Pablo Tosar

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Dr. Juan Pablo Tosar - RNA Society One of Dr. Juan Pablo Tosar’s proudest moments came from social media, when he replied to the RNA Society’s question of whether we should have an RNA day with “AUG1”, thereby contributing to the initi...

Thrilled to be featured in this month’s @rnasociety.bsky.social Spotlight!

Science is a team effort, so this recognition belongs to my colleagues and students. I'm so lucky to work with them!

(Yes, the #AUG1 story is here, straight from the golden age of Tw. 🐦)

www.rnasociety.org/spotlight/dr...

1 day ago 4 1 0 0
New HFSP Awardees 2026

New HFSP Awardees 2026

Attention scientists from all over the world🙃
The 2026 #HFSPResearchGrants are out! 🥳
117 scientists from 31 countries will pursue bold, interdisciplinary research, from #neuroscience to #ecology and beyond! 🧪
Are you one of the new #HFSPAwardees?
🔗https://bit.ly/4uGmMQ3
#sts #HFSP

1 month ago 46 12 7 15

It revealed postdocs are heterogeneous

7 months ago 10 0 1 0
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mGem: Guides or triggers? Extracellular RNAs beyond vesicular miRNAs | mBio Blood and other extracellular biofluids have a high RNase content. Hence, from its origins, the exRNA field has focused on extracellular vesicles (EVs) as the main carriers of RNA molecules that move ...

With @amyhbuck we wrote this piece on extracellular RNAs that intends not to give answers but to propose questions that can expand the field in new directions.

Hope you like it! We really enjoyed a lot brainstorming it.

journals.asm.org/doi/10.1128/...

7 months ago 6 1 0 0

You can read the published version @pubs.acs.org here:

pubs.acs.org/doi/10.1021/...

9 months ago 5 0 0 0
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Substantial hierarchical reductions of genetic and morphological traits in the evolution of rotiferan parasites Abstract. Within the last 800 million years animals evolved a vast range of diversity of species exhibiting an enormous disparity of forms and lifestyles.

🔥🔥🔥NEW PAPER OUT in @genomebiolevol.bsky.social
with @psarkies.bsky.social and many others who are not here, yet!🔥🔥🔥
academic.oup.com/gbe/advance-...

9 months ago 20 5 3 1
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Ribonuclease activity undermines immune sensing of naked extracellular RNA Castellano et al. show that when extracellular RNases are inhibited or absent, naked extracellular RNA is internalized spontaneously by cells, inducing inflammation mediated by endosomal TLRs or cytos...

Check out our paper about naked extracellular RNAs uptake, TLR signaling, endosomal escape, and the role of RNases in regulating this process.

www.cell.com/cell-genomic...

11 months ago 10 3 0 1
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New preprint: we isolated an heterogeneous population comprising both large and small #ExtracellularVesicles. Using a modified immuno-gold protocol, we show that, at least in U-2 OS EVs, CD9 and CD81 are enriched in EVs < 100 nm.

www.biorxiv.org/content/10.1...

1 year ago 4 0 0 1
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There are concerns that Bluesky's impact has faded since the initial hype. This is false.

That impression results from reading headlines about social media instead of the hard data.

The five HIGHEST points of Bluesky posts mentioning research all occur in the last 2 weeks.

1 year ago 235 88 3 9
Plato’s allegory of the cave applied to small RNA sequencing and the nicked tRNA / tDR dilemma

Plato’s allegory of the cave applied to small RNA sequencing and the nicked tRNA / tDR dilemma

Not all tRNA fragments (tDRs) are created equal. Here we share methods to differentiate:

1) real tDRs and those produced by dissociation of nicked tRNAs, 2) nicked tRNAs / tDRs in extracellular vesicles vs outside.

1) www.sciencedirect.com/science/arti...

2) www.sciencedirect.com/science/arti...

1 year ago 12 5 0 0
Graphical abstract showing Indian rhesus macaque with radiolabeled lipid nanoparticles injected into the right deltoid and major lymphatic organization of the macaque therein.

Graphical abstract showing Indian rhesus macaque with radiolabeled lipid nanoparticles injected into the right deltoid and major lymphatic organization of the macaque therein.

Here's a clever new study looking at where mRNA vaccine lipid nanoparticles (mRNA-LNPs) go after vaccination (using relevant doses of vaccine) in non-human primates (and mice): www.cell.com/molecular-th...

Brief thread🧵

1 year ago 58 19 7 4
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GRC on RNA Nanotechnology came to an end yesterday. Thanks to the organizers for inviting me to present our work on the uptake of naked exRNAs, and to serve as discussion leader of the RNA Delivery session. What a fantastic and enjoyable conference!
www.grc.org/rna-nanotech...

1 year ago 9 0 0 0
Protocol for isolating RNA from the surfaces and apoplastic spaces of plant leaves.

Protocol for isolating RNA from the surfaces and apoplastic spaces of plant leaves.

Very happy to start the new year with publication of our new work on leaf surface RNA. Plant leaves secrete diverse RNAs that are surprisingly stable on their surfaces. Next question to answer: What do they do? www.pnas.org/doi/epub/10....

1 year ago 110 48 2 3
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Why Bax detection in >1400 publications might be flawed - Cell Death & Disease Cell Death & Disease - Why Bax detection in &gt;1400 publications might be flawed

"Here, we show that this Ab appears to be unreliable due to providing false-positive signals at the expected molecular weight of Bax in immunoblotting experiments and likewise provides false-positive signals in immunofluorescence-based detection of Bax expression"

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

1 year ago 47 15 5 3

Some of you probably do not realize how difficult it is to get a BIG international grant when located in LMIC (especially in Argentina). I am so proud of you @pstrobl.bsky.social. So well deserved. I am so happy to be part. You are the best!! @wellcometrust.bsky.social @unsamoficial.bsky.social

1 year ago 4 2 0 0

But please dont share this as a mantra for success. If your success comes at the direct expense of your colleagues because they are doing all the work everyone is supposed to share in, it does not make you ‘successful’ it just makes you a horrible colleague.

Also see peer review

Rant over. For now

1 year ago 896 98 34 12

This will be the next level of scientific devaluation: science to proof a political standpoint, rather than policy following scientific proof.

1 year ago 3 1 1 0

Thus, endosomal signaling within a tissue microenvironment is likely, while miRNA signaling between cells from different organs would require highly efficient release and/or highly efficient uptake. Both are extracellular RNA-mediated intercellular communication processes. But likelihood differs

1 year ago 2 0 0 0
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I guess it depends on several factors. First, what we understand by function. miRNAs require the same sequence to be present in the cytosol at a certain amount. Endosomal TLR signaling is less sequence-dependent. Second, the conc. might be high next to the releasing cell, then decays (cont…)

1 year ago 1 0 1 0
The Gartner Hype cycle

The Gartner Hype cycle

As a relatively new field, it’s following this path. With the exception that, depending who you talk to, we might still be in the peak of inflated expectations, the trough of disillusionment or the slope of enlightenment. There are lots of artifacts going on, but probably also important biology

1 year ago 3 0 1 0
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MirGeneDB 3.0: improved taxonomic sampling, uniform nomenclature of novel conserved microRNA families and updated covariance models Abstract. We present a major update of MirGeneDB (3.0), the manually curated animal microRNA gene database. Beyond moving to a new server and the creation

MirGeneDB 3.0 is published.
Great teamwork and substantial improvement of database, Taxon sampling and we took over nomenclature of novel genes and families, too

academic.oup.com/nar/advance-...

1 year ago 40 21 2 0
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Frontiers | Serum-derived host miR-423-5p and miR-378a-3p as molecular markers for severe tuberculosis: a promising prognostic tool for survival Tuberculosis (TB) remains a leading cause of infectious disease-related mortality. Annually, 10 million people contract TB, resulting in 1.5 million deaths, ...

First post, last paper out www.frontiersin.org/journals/tub... @carlos-robello.bsky.social

1 year ago 4 1 2 0

#RNAsky #RNAbiology

1 year ago 10 3 0 0
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The conserved landscape of RNA modifications and transcript diversity across mammalian evolution https://www.biorxiv.org/content/10.1101/2024.11.24.624934v1 Gene expression programs underpin the development of shared phenotypes, yet the importance of transc

The conserved landscape of RNA modifications and transcript diversity across mammalian evolution www.biorxiv.org/content/10.1101/2024.11....

1 year ago 24 11 0 4
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📢SAVE THE DATE📢

The 4th Molecular Biosystems Conference is set!

Plan to join us in southern Chile for insightful discussions on gene regulation & functional genomics #mbiosys25 🧬🖥️

Stay tuned for more details!

🗓️Sep 29-Oct 3, 2025
📍Puerto Varas, Chile
🌐http://molbiosystems.com

1 year ago 8 8 0 1
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