Johannes Bj{\"o}rk
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awfuldodger.bsky.social
Johannes Bj{\"o}rk
@awfuldodger.bsky.social
Assistant professor | Systems ecologist studying gut microbiome-immune interactions in cancer immunotherapy and solid organ transplantation | Previously longitudinal gut microbiome dynamics in wild baboons and host-microbe interactions in marine sponges.
Reposted by Johannes Bj{\"o}rk
Reposted by Johannes Bj{\"o}rk
Interested in #drugs, #microbiome and #antibiotic resistance, then check out our paper on the effects of over 300 drugs on the gut microbiome. Exciting results as well on the role of antibiotic resistance defining how microbiomes respond to drugs.
@quadraminstitute.bsky.social

rdcu.be/eMmcT
Systematic metaproteomics mapping reveals functional and ecological landscapes of Ex vivo human gut microbiota responses to therapeutic drugs
Nature Communications - Here, the authors systematically map metaproteomic responses of ex vivo human gut microbiota to common therapeutics, identifying several drug classes inducing strong...
rdcu.be
October 24, 2025 at 4:20 PM
Reposted by Johannes Bj{\"o}rk
Reposted by Johannes Bj{\"o}rk
New preprint out by #RobertKoetsier, the first of his PhD project, on assessing the use of cross-species coexpression analysis to identify primary and secondary metabolic interactions in microbiomes: www.biorxiv.org/content/10.1...
Using cross-species co-expression to predict metabolic interactions in microbiomes
In microbial ecosystems, metabolic interactions are key determinants of species’ relative abundance and activity. Given the immense number of possible interactions in microbial communities, their expe...
www.biorxiv.org
September 22, 2025 at 7:42 AM
Reposted by Johannes Bj{\"o}rk
Cool application of microbiome in food science

Using metagenomics on Colombian cacao, they mapped how microbes influence chocolate flavors. Then they built a defined microbial consortium that replicates premium chocolate flavors -- validated by trained tasters!

www.nature.com/articles/s41...
A defined microbial community reproduces attributes of fine flavour chocolate fermentation - Nature Microbiology
An in-depth microbiological and metagenomic analysis of Colombian farm and fermentation facilities resulted in the design of a defined microbial community that can reproduce the flavour of fine chocol...
www.nature.com
August 19, 2025 at 8:07 PM
Reposted by Johannes Bj{\"o}rk
PHLAME calls strains at multiple levels of phylogenetic resolution, including the lineage leve.

Evan benchmarked PHLAME rigorously, including on both simulated data and samples from which we have both isolates and metagenomes.
August 15, 2025 at 4:33 PM
Reposted by Johannes Bj{\"o}rk
Microbiomes are the foundation of the biosphere. Hosts such as humans, bees, and plants have never been just hosts. They are complex units of biological organization upon which various forces act to shape composition, form, and function. www.science.org/doi/10.1126/...
The disciplinary matrix of holobiont biology
Uniting life’s seen and unseen realms guides a conceptual advance in research
www.science.org
August 12, 2025 at 1:12 PM
Come and join us at the Groningen Microbiome Hub! We are seeking a motivated and enthusiastic PhD student with a focus on computational biology, bioinformatics, and microbiome analysis to join a fully funded project on the role of the gut microbiome in cancer and cancer immunotherapy.
bit.ly/4fBt38H
PhD position - bioinformatica / microbioom - Werkenbijumcg.nl - UMCG DXP
We are seeking a motivated and enthusiastic PhD student with a focus on computational biology, bioinformatics, and microbiome analysis to join a fully funded project on the role of the gut microbiome in cancer and cancer immunotherapy.
bit.ly
August 12, 2025 at 1:28 PM
Reposted by Johannes Bj{\"o}rk
Wow! 🤩🤩🤯
"We demonstrate that a single #tree hosts approximately one trillion bacteria in its woody tissues, with microbial communities distinctly partitioned between heartwood and sapwood, each maintaining unique #microbiomes with minimal similarity to other plant tissues or ecosystem components."
August 11, 2025 at 1:52 PM
Reposted by Johannes Bj{\"o}rk
Antimicrobial resistance ( #AMR ) is a silent pandemic that has been attributed to over a million deaths per year worldwide. Socio-demographic factors contribute to the emergence and spread of AMR.🧵
July 15, 2025 at 2:46 PM
Reposted by Johannes Bj{\"o}rk
Reposted by Johannes Bj{\"o}rk
🦠 Pesticides alter your gut & your health

A new study maps how pesticides disrupt gut bacteria, changing hundreds of metabolites & triggering inflammation through lipid metabolism.

🔗 www.nature.com/articles/s41...

#SciComm #Microbiome 🧪 #GutHealth
Mapping pesticide-induced metabolic alterations in human gut bacteria - Nature Communications
Pesticide exposure induces significant alterations in gut bacterial metabolism. Here, the authors perform a multi-omics mapping of pesticide-gut microbiota-metabolite interactions, identifying pestici...
www.nature.com
June 29, 2025 at 6:01 PM
Reposted by Johannes Bj{\"o}rk
🚨Out now!

About 15,000 pairwise interactions within S. epidermidis from 18 people in 6 families reveal the antagonism and molecular trade-offs that shape the skin microbiota @contaminatedsci.bsky.social @mancusosci.bsky.social #MicrobiomeSky

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

read here: rdcu.be/et7VP
Intraspecies warfare restricts strain coexistence in human skin microbiomes - Nature Microbiology
About 15,000 pairwise interactions within S. epidermidis from 18 people in 6 families reveal the antagonism and molecular trade-offs that shape the skin microbiota.
www.nature.com
June 30, 2025 at 3:46 PM
Reposted by Johannes Bj{\"o}rk
Why don’t people who live together have the same strains of microbes? Tami Lieberman (@contaminatedsci.bsky.social) and I put forward one underexplored reason in our new preprint:
Intraspecies warfare restricts strain coexistence in human skin microbiomes
May 8, 2024 at 2:07 PM
Thank you for inviting me to the 11th edition of the Barcelona debates on the human microbiome. It was a great meeting! Always nice to be back in Barcelona! Moltes gràcies!
🥦 Explore how diet fuels innovation in Session 2: Diet & Microbiome! From cardiometabolic health to boosting melanoma immunotherapy — nutrition is emerging as a powerful therapeutic tool. With insights from @fasnicar.bsky.social ky.social & ‪@awfuldodger.bsky.social‬
June 28, 2025 at 6:53 AM
Reposted by Johannes Bj{\"o}rk
Ever wondered why proton pump inhibitors raise the risk of C. diff infections? Is it due to pH shifts or direct antibacterial effects on the gut microbiome? We think it’s the pH. 🧪💡 Dive into Julia & Patrick’s new paper for the full story! 📖👇 #Microbiome #PPI
doi.org/10.1080/1949...
Proton-pump inhibitors increase C. difficile infection risk by altering pH rather than by affecting the gut microbiome based on a bioreactor model
Clostridioides difficile infections often occur after antibiotic use, but they have also been linked to proton-pump inhibitor (PPI) therapy. The underlying mechanism – whether infection risk is due...
doi.org
June 17, 2025 at 12:32 PM
Reposted by Johannes Bj{\"o}rk
In this Review, Ellen Blaak and colleagues discuss the effect of antibiotic-induced perturbations of the gut #microbiome on host #metabolic health (£) bit.ly/3TpFUjQ #EndoSky #Microsky
June 17, 2025 at 1:55 PM
Reposted by Johannes Bj{\"o}rk
The gut microbiome as a target in cancer immunotherapy: opportunities and challenges for drug development www.nature.com/articles/s41...
rdcu.be/eo6l2

This new Review highlights key advances in clinical microbiome characterization and their implications for immunotherapy #ASCO2025
June 2, 2025 at 2:54 PM
Reposted by Johannes Bj{\"o}rk
A new review suggests that genetic mechanisms driving host– #microbiome interactions will ultimately contribute to the development of personalized medicine and targeted therapies @natgenet.nature.com www.nature.com/articles/s41...
Genomics of host–microbiome interactions in humans - Nature Reviews Genetics
In this Review, Ferretti et al. discuss advances in our understanding of interactions between the human genome and the microbiome, including the effects of the microbiome on host gene regulation.
www.nature.com
June 4, 2025 at 9:22 AM
Reposted by Johannes Bj{\"o}rk
"The Microbiome for Clinicians" a new, open-access review of progress, limitations, and next steps
@cellpress.bsky.social
www.cell.com/cell/fulltex...
May 29, 2025 at 3:44 PM