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Ben Valderrama

@bvalderrama.bsky.social
395 followers 363 following 36 posts

Computational Biologis at APC microbiome Ireland 🇮🇪 Personal website: shorturl.at/meCEH Microbiome-Gut-Brain axis | Gut permeability | Bioinformatics🦠🧬💻 | Stats

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Reposted by Ben Valderrama
Alexander Rakitko @alexrakitko.bsky.social · 09/05/2026
🧬CroCoDeEL is a new tool for detecting cross-sample contamination in metagenomic data.🐊🦠 The idea behind CroCoDeEL is simple and elegant. Imagine different cocktails poured into a row of glasses...🧵 www.nature.com/articles/s41... #Microbiome #Metagenomics #Contamination
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Eric Topol @erictopol.bsky.social · 20/04/2026
We've known the gut-brain axis is a key underpinning of Parkinson's disease. Today, for the 1st time, a gut microbiome signature denoting risk found in healthy individuals with genetic predisposition nature.com/articles/s41...
nature.com
Microbiome signature of Parkinson’s disease in healthy and genetically at-risk individuals - Nature Medicine
Microbiome analysis suggests that gut microbial changes in Parkinson’s disease evolve progressively from healthy individuals to genetically at-risk individuals to clinically affected patients, with th...
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Reposted by Ben Valderrama
Chiara Mazzoni @chimazz.bsky.social · 03/04/2026
Finally out! 🥂 link.springer.com/article/10.1... We used 3 different methods to profile fecal DNA and analysed how gut microbiome composition and human cell fractions define disease severity in IBD pediatric patients. Many thanks to my supervisor Moran Yassour and our collaborators 🧵⬇️
link.springer.com
Human DNA levels in feces reflect gut inflammation and associate with presence of gut species in IBD patients across the age spectrum - Microbiome
Background Feces represent a complex biological matrix that provides valuable information about intestinal physiology and gut microbial activity. Comprehensive fecal DNA sequencing is mostly utilized ...
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Reposted by Ben Valderrama
Sebastian Schmidt @tsbschm.bsky.social · 03/04/2026
Our work on 'hidden diversity' in unbinned contigs is now published in @natmicrobiol.nature.com : www.nature.com/articles/s41... See the linked threads for more details!
nature.com
Unbinned contigs expand known diversity in the global microbiome - Nature Microbiology
Re-analysis of over 92,000 metagenomes reveals hundreds of thousands of previously undescribed Bacterial and Archaeal clades hidden in plain sight.
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APC Microbiome Ireland @apcmicrobiomeirel.bsky.social · 16/03/2026
Early-life changes to the gut microbiome can affect social behaviour. A study published in @cp-iscience.bsky.social found certain diet ingredients helped restore that response and changed brain pathways linked to learning and development. buff.ly/YeQk7LV #GutBrainAxis #Microbiome Collaborators⬇
Diet is one of the major modulators of the microbiota-gut-brain axis across the lifespan. Milk bioactive components, including human milk oligosaccharides such as fucosyllactose and sialyllactose, and prebiotics, including GOS and FOS, promote the viability of commensal bacteria, fortify the intestinal barrier, and improve cognitive development. Here, we investigate the ability of these dietary components alone or in combination to counter the behavioral and physiological effects of early-life microbiota depletion via broad-spectrum antibiotics in mice.
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APC Microbiome Ireland @apcmicrobiomeirel.bsky.social · 24/02/2026
New APC paper in Nature Comms First author Cristina Cuesta-Marti and colleagues examine how eating unhealthy foods early in life leaves lasting brain and feeding changes but bacteria can help restore healthy eating. www.nature.com/articles/s41... #Microbiome #GutBrainAxis Tagging collaborators ⬇️
An unhealthy diet disrupts feeding behavior and the gut microbiota, but
whether early-life dietary effects persist, or can be restored later in life,
remains unclear. We investigated whether microbiota-targeted interventions
(FOS + GOS or Bifidobacterium longum APC1472) could restore early-life highfat/
high-sugar (HFHS) diet-induced feeding alterations in adult female and
male mice.
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GMbC @globalmicrobiome.bsky.social · 12/11/2025
How does industrialization and lifestyle impact our interactions with gut microbiomes? And what is the consequence of these perturbations on our physiology? Discover findings from our new study addressing these questions: www.biorxiv.org/content/10.1... #microbiome #globalhealth #GMbC
biorxiv.org
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Feargal Ryan @feargalr.bsky.social · 03/11/2025
🚀 TaxSEA v1.2 is now live in #Bioconductor release 3.22! TaxSEA brings enrichment testing to #metagenomics data. Just like GSEA does for transcriptomics making #microbiome & #microbiota results biologically interpretable, fast, and reproducible. We've added new DBs & features in 1.2 👇 🧵
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bioRxiv Bioinfo @biorxiv-bioinfo.bsky.social · 30/10/2025
Orchestrating Microbiome Analysis with Bioconductor www.biorxiv.org/content/10.1101/202…
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Reposted by Ben Valderrama
Silas Kieser @silask.bsky.social · 29/08/2025
New paper out: Subspecies of the human gut microbiota carry implicit information for in-depth microbiome research.
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Ben Good @benjaminhgood.bsky.social · 16/08/2025
Excited to share a new preprint w/ the Sonnenberg lab, led by Matt Carter, @zzzhiru.bsky.social & @mattolm.bsky.social. We analyzed the microbiomes of two non-industrialized populations from opposite sides of the globe to try to reconstruct the recent evolutionary history of our gut microbiota.
biorxiv.org
Prehistoric Global Migration of Vanishing Gut Microbes With Humans
The gut microbiome is crucial for health and greatly affected by lifestyle. Many microbes common in non-industrialized populations are disappearing or extinct in industrialized populations. Understand...
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Reposted by Ben Valderrama
Bork Group at EMBL Heidelberg @borklab.bsky.social · 15/08/2025
New preprint from lab: www.biorxiv.org/content/10.1... describing the Metalog database of manually annotated contextual data for >110k metagenomics samples around the globe metalog.embl.de See the thread below from @biocs.bsky.social for more info!
biorxiv.org
Metalog: curated and harmonised contextual data for global metagenomics samples
Metagenomic sequencing enables the in-depth study of microbes and their functions in humans, animals and the environment. While sequencing data is deposited in public databases, the associated context...
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Reposted by Ben Valderrama
Climate, Ecology, War & More: Dr. Glen Barry BigEarthData.ai @bigearthdata.ai · 09/08/2025
The South American MicroBiome Archive (saMBA): enriching the microbiome field by studying neglected populations ->Nature | More info from EcoSearch
nature.com
The South American MicroBiome Archive (saMBA): enriching the microbiome field by studying neglected populations
The European Nucleotide Archive (ENA) was used as an interface to systematically search the INSDC. Two authors (BV and PCR) screened the databases independently to identify bioprojects including samples from the gut microbiome of South American individuals. For each South...
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Ben Valderrama @bvalderrama.bsky.social · 13/08/2025
Thank you so much!
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Reposted by Ben Valderrama
Javier Santoyo @jsantoyo.bsky.social · 13/08/2025
The South American MicroBiome Archive (saMBA): enriching the microbiome field by studying neglected populations. #Microbiome #NegletecPopulations @natcomms.nature.com 🧬 www.nature.com/articles/s41...
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Ben Valderrama @bvalderrama.bsky.social · 11/08/2025
Thanks John for sharing the work. Also for the constant mentoring and support! It's deeply appreciated 🙌🔥
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John F. Cryan @jfcryan.bsky.social · 11/08/2025
Putting the Global South on the Microbiome research map - Really proud of Chilean PhD student @bvalderrama.bsky.social who championed this new important paper just out in ‪@natcomms.nature.com‬ "If microbiome science is to benefit everyone, it must include everyone." www.nature.com/articles/s41...
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Ben Valderrama @bvalderrama.bsky.social · 11/08/2025
For more information about our work, see the thread I shared when the preprint was released: bsky.app/profile/bval...
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Ben Valderrama @bvalderrama.bsky.social · 11/08/2025
I'm beyond excited to share that our last work is now published in Nature Communications. The South American MicroBiome Archive (saMBA): enriching the microbiome field by studying neglected populations 📄: shorturl.at/wq9pr
shorturl.at
The South American MicroBiome Archive (saMBA): enriching the microbiome field by studying neglected populations - Nature Communications
Here, Valderrama et al., introduced ‘saMBA’, the largest collection of uniformly analyzed microbiome data from South America, the worlds most biodiverse yet less characterized region. The article prop...
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Rich LeDuc (He/Him) @rich-leduc.bsky.social · 09/08/2025
Seems like we keep saying the same things over and over in #science. Every biomedical researcher should have a graduate course in #statistics. My record is $100k USD lost because a post doc had bad (well, no) experimental design for a proteomics project. www.nature.com/articles/s41...
nature.com
How thoughtful experimental design can empower biologists in the omics era - Nature Communications
Here, the authors discuss principles of experimental design that are relevant for all biology research, along with special considerations for projects using -omics approaches, highlighting common expe...
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Reposted by Ben Valderrama
María R. Aburto @maburto.bsky.social · 06/08/2025
So happy to see this excellent work out! ‘Gut microbiota regulates exercise-induced hormetic modulation of cognitive function’ Fantastic collaboration with @jltrejoneuro.bsky.social @cintadoelisa.bsky.social @jfcryan.bsky.social www.thelancet.com/journals/ebi...
thelancet.com
Gut microbiota regulates exercise-induced hormetic modulation of cognitive function
These findings suggest that the hormetic effects of physical exercise on cognitive function and neurogenesis are mediated by corresponding changes in the gut microbiota, highlighting a novel mechanist...
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Ben Valderrama @bvalderrama.bsky.social · 21/07/2025
I’ve been thinking about meta-analysis of microbiome data for a on-going collaboration when I noticed that, although they are fairly common in the literature, there is a lack of critical discussion on their limitations. This blog is my (unsolicited) contribution to the matter. shorturl.at/mXSar
shorturl.at
Common Limitations of Gut Microbiome Meta-Analyses Undermine their Credibility
Although microbiome meta-analyses are fairly common in the literature, there is a lack of critical discussion on their limitations. This post is my (unsolicited) contribution to that topic.
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Ben Valderrama @bvalderrama.bsky.social · 07/07/2025
A blog post about batch effects in bioinformatics and how to address them -- By me 🤓 shorturl.at/cmF8z
open.substack.com
When Good Science Goes Wrong: How Batch Effects Can Obscure Biology
...and how to successfully avoid it
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Nature Microbiology @natmicrobiol.nature.com · 27/06/2025
It's #WorldMicrobiomeDay! 🦠 We are proud to be a part of this exciting research area through contributions by our amazing authors. To celebrate this occasion, here are some of our favourite microbiome papers. Do you have a favourite of yours? let us know in the replies. #MicroSky #MicrobiomeSky
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 17/06/2025
Apparently it is still possible in 2025 to publish a paper in Nature that *filters* for strong signals before applying un-corrected significance tests. Seeing mistakes like this pass peer review is demoralizing.
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Ben Valderrama @bvalderrama.bsky.social · 11/06/2025
I started a blog: "The Middle Author's Syndrome" and I've just wrote my first post: bvalderrama.substack.com/p/my-first-r.... It's about a new side research project I just started. We will see if and how these experiments (the blog and the project) develop over time 😂.
bvalderrama.substack.com
My First Research Project Conducted in the Open
TL;DR I’ll start a biobliometrics analysis on the Microbiome-Gut-Brain axis field.
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Rich Abdill @richabdill.com · 19/05/2025
We wrote up the process we've developed for processing microbiome data in bulk! Workflow management tools are miraculous for processing a project with lots of samples, but when you have lots of *projects* too, as we do when pulling data from NCBI databases, it gets hard to juggle. #microbiomesky
arxiv.org
Compendium Manager: a tool for coordination of workflow management instances for bulk data processing in Python
Compendium Manager is a command-line tool written in Python to automate the provisioning, launch, and evaluation of bioinformatics pipelines. Although workflow management tools such as Snakemake and N...
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Mizrahi Lab @mizrahilab.bsky.social · 21/04/2025
Another step for microbiome research!🔬 New study introduces saMBA, a gut microbiome archive from South America. Understanding the full picture of gut microbiome biodiversity is crucial & saMBA is helping us get there! @bvalderrama.bsky.social @jfcryan.bsky.social www.biorxiv.org/content/10.1...
biorxiv.org
The South American MicroBiome Archive (saMBA): Enriching the healthy microbiome concept by evaluating uniqueness and biodiversity of neglected populations
The composition and function of the human gut microbiome has been linked to multiple health outcomes across all world regions, often with region-specific associations. Unfortunately, the extent to whi...
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Ben Valderrama @bvalderrama.bsky.social · 14/04/2025
science.org
How I finally found my confidence as a scientist
After three postdoc positions, this researcher now sees her skills and knowledge as valuable
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Reposted by Ben Valderrama
Svetlana Ugarcina Perovic @svetlanaup.bsky.social · 11/04/2025
New #MicrobiomeDigest is OUT microbiomedigest.com/2025/04/10/a... • The South American MicroBiome Archive / @bvalderrama.bsky.social • coverM / @aroneys.bsky.social • #OpenSourceDiaries / Anita Ihuman • invitation for the next week @microbiomevif.bsky.social & more. Happy Friday!
microbiomedigest.com
April 11, 2025
Happy Friday and see you next week at MVIF! Gut microbiome The South American MicroBiome Archive (saMBA): Enriching the healthy microbiome concept by evaluating uniqueness and biodiversity of negle…
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
Finally, I’d like to thank again everyone involved in this research: Paulina Calderón-Romero, Thomaz, @biothomaz.bsky.social, and of course to my supervisors: Aonghus Lavelle, Ger Clarke, and John @jfcryan.bsky.social. Also, thanks to the centre APC @apcmicrobiomeirel.bsky.social
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
We show how semiautomated project screening can better represent regional biodiversities 🌎. The workflow is available for researchers building similar archives for other regions or body sites. The data generated is open, and new features are coming, so keep an eye on GitHub: shorturl.at/i9P1G (8/8)
github.com
GitHub - Benjamin-Valderrama/saMBA-pipeline: Workflow to build archives of 16s faecal microbiome samples from neglected populations.
Workflow to build archives of 16s faecal microbiome samples from neglected populations. - Benjamin-Valderrama/saMBA-pipeline
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
We improved estimates of regional biodiversity and identified countries with the greatest potential to uncover more biodiversity in future sampling efforts—an analysis that’s the first of its kind and a critical guide for regions with limited research resources. (7/8).
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
After analysing >30 projects—most not included in any compendium before—we show how saMBA expanded our understanding of the human gut microbiome with samples from nearly every country in the region 🌎. We also found that nearly a third were likely discarded due to past sample size restrictions (6/8).
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
Why South America? Simple: it’s one of the regions with the fewest microbiome samples but some of the highest gut microbiome diversity among its inhabitants ☝️ (shorturl.at/qT1I6). Plus, I’m from Chile, so there's an emotional link 😂 (5/8)
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
Inspired by their work and after talking with Richard (first author in shorturl.at/qT1I6), I recreated the workflow from the global compendium, which is currently unavailable to other users. Then, with my coauthors, we curated a list of projects to be included in our archive: saMBA (4/8).
shorturl.at
Integration of 168,000 samples reveals global patterns of the human gut microbiome
The Human Microbiome Compendium is a unified database of publicly available human gut microbiome 16S samples, built with the integrated data from hundreds of independent projects. The compendium is us...
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
So, global compendiums have analysed gut microbiomes using unified workflows. But resource-driven choices can unintentionally perpetuate some representativity issues these efforts aimed to fix—like filtering based on project size and metadata annotation. (3/8)
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
We know public microbiome data is dominated by samples from Europe and North America. That’s a problem since microbe-health associations often don’t translate across global populations. (2/8)
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Ben Valderrama @bvalderrama.bsky.social · 09/04/2025
Excited to share our preprint on the South American MicroBiome Archive (saMBA)! 🌎🦠. We analysed one of the regions with the fewest microbiome samples but some of the highest biodiversities. 📄: shorturl.at/Lmvp5 🧵: What did we find—and why? Find out 👇 #microbiome #gut-microbiome (1/8)
biorxiv.org
The South American MicroBiome Archive (saMBA): Enriching the healthy microbiome concept by evaluating uniqueness and biodiversity of neglected populations
The composition and function of the human gut microbiome has been linked to multiple health outcomes across all world regions, often with region-specific associations. Unfortunately, the extent to whi...
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Cristina Rosell Cardona @crosellcardona.bsky.social · 05/04/2025
First paper from my PD at @apcmicrobiomeirel.bsky.social out! 🥳 Do you want to know how acute stress enhances synaptic plasticity? Our latest study shows that the gut microbiota is essential. @jfcryan.bsky.social @kjdoriordan.bsky.social sciencedirect.com/science/article/pii/S0028390825001406?s=08
sciencedirect.com
Acute stress enhances synaptic plasticity in male mice via a microbiota-dependent mechanism
Acute stress can enhance or impair synaptic plasticity depending on the nature, duration, and type of stress exposure as well as the brain region exam…
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Reposted by Ben Valderrama
Tal Korem @tkorem.bsky.social · 27/03/2025
Happy to share DEBIAS-M, our new method for domain adaptation and bias correction in #microbiome data.🧬🖥️ Microbiome data is very variable, with substantial study- and batch-effects. DEBIAS-M corrects these, enabling robust and generalizable analyses. A quick thread: www.nature.com/articles/s41...
nature.com
Processing-bias correction with DEBIAS-M improves cross-study generalization of microbiome-based prediction models - Nature Microbiology
DEBIAS-M corrects technical variability in microbiome data in a manner both interpretable and suitable for machine learning. In extensive benchmarks, DEBIAS-M facilitates robust analyses that generali...
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Leo Lahti @antagomir.bsky.social · 24/03/2025
Brain, bacteria, and behaviour (PhD-level) summer course, The Netherlands, July 11-15 - also featuring R/Bioconductor & microbiome data science: www.radboudumc.nl/en/agenda/20...
radboudumc.nl
Brain, bacteria, and behaviour summer course - Understanding the gut brain axis
Looking for information about Brain, bacteria, and behaviour summer course? Read more about this Radboudumc agenda item
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Ben Valderrama @bvalderrama.bsky.social · 24/03/2025
Feedback on the chapter is welcome! It was a pleasure to contribute to the book Orchestrating Microbiome Analysis (OMA) shorturl.at/BI6ny. I hope to do it again—and that more people join in as well!
shorturl.at
Orchestrating Microbiome Analysis
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Ben Valderrama @bvalderrama.bsky.social · 24/03/2025
Are you thinking about applying ML to analyze your microbiome data but unsure how or where to start? Worry no more! Our book chapter has you covered: shorturl.at/8kvX1 It’s an online intro to deploying ML on real microbiome data with code, result interpretation, tips, and challenges at the end.
shorturl.at
24  Machine learning – Orchestrating Microbiome Analysis
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bioRxiv Microbiology @biorxiv-microbiol.bsky.social · 10/03/2025
A glycan atlas of the mammalian intestine through ontogeny and inflammation www.biorxiv.org/content/10.1101/202…
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Nature Reviews Gastroenterology & Hepatology @natrevgastrohep.nature.com · 09/03/2025
ICYMI: New online! AI-enabled ‘endo-histo-omics’: breaking down intestinal barriers in IBD
nature.com
AI-enabled ‘endo-histo-omics’: breaking down intestinal barriers in IBD
Nature Reviews Gastroenterology & Hepatology, Published online: 03 March 2025; doi:10.1038/s41575-025-01051-1The AI-driven ‘endo-histo-omics’ approach integrates clinical, endoscopic, histological and molecular data to improve management of inflammatory…
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Bork Group at EMBL Heidelberg @borklab.bsky.social · 26/02/2025
We're once again hosting the Human #Microbiome conference at @embl.org, organized by Ami Bhatt, Nicola Segata, Mani Arumugam and Peer Bork! We always have a great lineup of speakers, so register now and think about an abstract to submit (abstract submission deadline in June)
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Amy D Willis @amydwillis.bsky.social · 21/02/2025
The latest from the StatDivLab -- guidance for your #microbiome data analysis with a focus on the #statistics. Planning, deciding, modeling, justifying, communicating, visualizing... "Papers Need Friends" blog post coming shortly.
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Ben Valderrama @bvalderrama.bsky.social · 18/02/2025
Special shout-out to @jatinnagpal.bsky.social. Working with you was a very nice experience, and I'm sure there will be more collaborations comming 🥳.
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Ben Valderrama @bvalderrama.bsky.social · 18/02/2025
Joining this project ~2 years ago allowed me to be part of the APC and the Cryan lab, so it has an special place in my heart. This was also the last time I worked with pipettes (for the safety of my lab mates 😂) before going back to fully computational work.
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