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Laura Álvaro-Llorente

@lauralvllo.bsky.social
81 followers 122 following 4 posts

PhD student at Evodynamics lab (Hospital Ramón y Cajal). New strategies against antibiotic resistant bacteria and AMR evolution in bacteria.

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Reposted by Laura Álvaro-Llorente
Paloma Rodera @palomarodera.bsky.social · 19/05/2026
New paper out! 🔈 Genomic Characterization of the RyC collection: 50 Multidrug Resistant Clinical Isolates of Escherichia coli and Klebsiella spp. 50 MDR gut isolates, 2 sequencing platforms, 4 “omes,” and 1 mission: provide a resource to decode AMR and MGE dynamics www.biorxiv.org/content/10.6...
biorxiv.org
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Reposted by Laura Álvaro-Llorente
Ana Elena Pérez-Cobas @anaelenaperezcobas.bsky.social · 11/05/2026
I'm pleased we discussed our research on the respiratory and intestinal microbiomes in the evolution of critically ill patients at #CSMicrobiome2026 @cellpressevents.bsky.social Great work of Iván Linares and @sandramingo.bsky.social
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Laura Álvaro-Llorente @lauralvllo.bsky.social · 07/05/2026
This paper is 💥 Really nice work by @nachodequinto.bsky.social
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Reposted by Laura Álvaro-Llorente
Teresa M. Coque @tmcoque.bsky.social · 26/03/2026
We are pleased to share our last article rdcu.be/fabhM. It offers the most comprehensive analysis so far of Ab+non-Ab resistance genes in human gut microbiome, using an Indigenous population (low industrialization, chronic Hg exposure from gold mining) 6/6👇
rdcu.be
The antimicrobial gut resistome of the Wayampi reveals a shared background of antibiotic and metal resistance genes with industrialized populations, underscoring the “robust-yet-fragile” architecture ...
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Reposted by Laura Álvaro-Llorente
Christopher Frøhlich @cfr016.bsky.social · 15/02/2026
Sometimes, adaptation to one #antibiotics can make bacteria more vulnerable to other drugs. #CollateralSensitivity. 💡 By following the evolution of a β-lactamase, we uncovered how mutations can both create and mitigate such collateral sensitivity networks. www.biorxiv.org/content/10.6...
biorxiv.org
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Reposted by Laura Álvaro-Llorente
Cristina Herencias @crisherencias.bsky.social · 02/02/2026
🧬New paper out! We report the first isolation of viable B. bacteriovorus predators from human gut microbiota. www.frontiersin.org/journals/mic.... Great work of Mario Romero @migueldiezfdz.bsky.social @josete600.bsky.social and @rosacampo.bsky.social
frontiersin.org
Frontiers | Genome assembly and functional predation analysis of novel Bdellovibrio isolates from human gut microbiota
IntroductionPredatory bacteria of the Bdellovibrio and like organisms (BALOs) have long been postulated as living antimicrobials, yet their occurrence and ec...
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Reposted by Laura Álvaro-Llorente
Manuel Ares-Arroyo @aresarroyom.bsky.social · 14/01/2026
Bacteria chromosomes contain Genomic Islands that provide virulence, antibiotic resistance, MGE-defence,... They transfer between cells, but the mechanism of most remains elusive. Here we explore the conjugative capacity of these mysterious Genomic Islands. www.biorxiv.org/content/10.6...
biorxiv.org
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Reposted by Laura Álvaro-Llorente
Harris Wang @harriswang.bsky.social · 13/11/2025
Very excited to share our latest work in Science on metagenomic editing (MetaEdit) of the gut microbiome in vivo & directly modifying unculturable immune-modulatory SFB bug in the small intestine. 🦠🧬🛠️ www.science.org/doi/10.1126/...
science.org
Metagenomic editing of commensal bacteria in vivo using CRISPR-associated transposases
Although metagenomic sequencing has revealed a rich microbial biodiversity in the mammalian gut, methods to genetically alter specific species in the microbiome are highly limited. Here, we introduce ...
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Reposted by Laura Álvaro-Llorente
Nature Communications @natcomms.nature.com · 17/10/2025
Dissecting the fitness effects of a carbapenem resistance plasmid in clinical Enterobacterales using plasmid-wide CRISPRi screens @aliciapcv.bsky.social @jorgesastred.bsky.social @sanmillan.bsky.social @cnb-csic.bsky.social #bacteria #plasmids
bit.ly
Dissecting pOXA-48 fitness effects in clinical Enterobacterales using plasmid-wide CRISPRi screens - Nature Communications
This study investigates the effects of the carbapenem resistance plasmid pOXA-48 in clinical enterobacteria. Using CRISPRi screens, the authors revealed that the carbapenemase OXA-48 has a role in the plasmid-associated fitness costs.
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Reposted by Laura Álvaro-Llorente
Zamin Iqbal @zaminiqbal.bsky.social · 25/09/2025
Delighted to see our paper studying the evolution of plasmids over the last 100 years, now out! Years of work by Adrian Cazares, also Nick Thomson @sangerinstitute.bsky.social - this version much improved over the preprint. Final version should be open access, apols. Thread 1/n
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Reposted by Laura Álvaro-Llorente
Chris Creevey @hairyllama.bsky.social · 22/08/2025
New preprint from the group: @lucydillon.bsky.social analysis of 16,000+ genomes finds Bacteria cannot combine certain resistance genes as they are mutually exclusive, forcing them down incompatible evolutionary paths. biorxiv.org/content/10.1101/2025.08.20.671315v1 @jomcinerney.bsky.social
biorxiv.org
Genomic constraints shape the evolution of alternative routes to drug resistance in prokaryotes.
Background: Variation within the prokaryotic pangenome is not random, and natural selection that favours particular combinations of genes appears to dominate over random drift. What is less clear is w...
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Reposted by Laura Álvaro-Llorente
Paula Ramiro-Martínez @paularamiro.bsky.social · 22/07/2025
New paper alert! 🚨 Plasmids promote bacterial evolution through a copy number-driven increase in mutation rate. We combine theory, simulations, experimental evolution, and bioinformatics to demonstrate that mutation rates scale with plasmid copy number. Let's dive in! 🧵👇
biorxiv.org
Plasmids promote bacterial evolution through a copy number-driven increase in mutation rate
Plasmids are autonomously replicating DNA molecules that stably coexist with chromosomes in bacterial cells. These genetic elements drive horizontal gene transfer and play a fundamental role in bacter...
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Reposted by Laura Álvaro-Llorente
Sarah Bigot @sbigot.bsky.social · 20/08/2025
Our paper “Genetic determinants of pOXA-48 plasmid maintenance and propagation in Escherichia coli” is now online in @natcomms.nature.com ✨ 👉 www.nature.com/articles/s41... @cnrs-rhoneauvergne.bsky.social @mmsb-lyon.bsky.social
nature.com
Genetic determinants of pOXA-48 plasmid maintenance and propagation in Escherichia coli - Nature Communications
pOXA-48 plasmids have emerged as key vectors of carbapenem resistance within Enterobacteriaceae. In this study, the authors use a transposon sequencing (Tn-seq) approach to identify genetic determinan...
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Reposted by Laura Álvaro-Llorente
Alicia Calvo-Villamañán @aliciapcv.bsky.social · 20/08/2025
First of all, we recommend reading a complementary study led by Yannick Baffert and @sbigot.bsky.social, in which they use Tn-seq to study the genetic determinants of pOXA-48 in plasmid maintenance and conjugation. Really cool piece of work that reaches similar conclusions to ours! 2/14
nature.com
Genetic determinants of pOXA-48 plasmid maintenance and propagation in Escherichia coli - Nature Communications
pOXA-48 plasmids have emerged as key vectors of carbapenem resistance within Enterobacteriaceae. In this study, the authors use a transposon sequencing (Tn-seq) approach to identify genetic determinan...
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Reposted by Laura Álvaro-Llorente
Alicia Calvo-Villamañán @aliciapcv.bsky.social · 20/08/2025
This work is finally published! 🥳🧬 Plasmids are associated with very variable fitness costs in their different bacterial hosts. But, what is the contribution of each of the plasmid-genes in these host-specific effects? Study led by @jorgesastred.bsky.social, @sanmillan.bsky.social and myself! 1/14
rdcu.be
Dissecting pOXA-48 fitness effects in clinical Enterobacterales using plasmid-wide CRISPRi screens
Nature Communications - This study investigates the effects of the carbapenem resistance plasmid pOXA-48 in clinical enterobacteria. Using CRISPRi screens, the authors revealed that the...
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Reposted by Laura Álvaro-Llorente
Franklin Nobrega @fnobrega.bsky.social · 28/07/2025
Thrilled to see our Kiwa story out today! A membrane-associated supercomplex that senses infection and blocks replication and transcription. www.cell.com/cell/fulltex... Huge congratulations to Yi and Zhiying for bringing it home, to Thomas for starting us off, and to all the collaborators.
cell.com
Kiwa is a membrane-embedded defense supercomplex activated at phage attachment sites
Zhang, Todeschini, and Wu et al. show that the bacterial defense system Kiwa senses phage attachment at the membrane and assembles a transmembrane complex that halts infection by blocking phage DNA re...
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Reposted by Laura Álvaro-Llorente
Vivek Mutalik @vivekmutalik.bsky.social · 29/07/2025
#phage #phagesky Phage-based delivery of CRISPR-associated transposases for targeted bacterial editing | PNAS www.pnas.org/doi/10.1073/...
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
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Reposted by Laura Álvaro-Llorente
Emmanuele Severi @emmseveri.bsky.social · 29/07/2025
#phagesky www.cell.com/cell-host-mi...
cell.com
The prototypic crAssphage is a linear phage-plasmid
Schmidtke et al. demonstrate that C. communis, a ubiquitous human gut phage that evades conventional plaque-based isolation, predominately replicates as a low-copy linear phage-plasmid with a broad ho...
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Nature Reviews Genetics @natrevgenet.nature.com · 28/07/2025
ICYMI: New online! Experimental evolution in an era of molecular manipulation
nature.com
Experimental evolution in an era of molecular manipulation
Nature Reviews Genetics, Published online: 21 July 2025; doi:10.1038/s41576-025-00867-6In this Review, Ascensao and Desai discuss how methodological advances in genotype and phenotype manipulation are transforming experimental evolution approaches and providing new insights into the underlying genetics and forces that shape phenotypic evolution.
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Reposted by Laura Álvaro-Llorente
Eugen Pfeifer @eugenpfeifer.bsky.social · 28/07/2025
Excited 🥳 to share our latest work on gut phages! Big thanks to @epcrocha.bsky.social, Erick D, Camille d'H, @fplazaonate.bsky.social, Quentin LB, and all others involved for support and contributions! 🙌 Out in Cell Reports @cp-cellreports.bsky.social doi.org/10.1016/j.ce... Here's what we found 🤓
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Reposted by Laura Álvaro-Llorente
Zeynep Baharoglu @zeynepbaharoglu.bsky.social · 28/07/2025
tRNA modification profiling reveals epitranscriptome regulatory networks in Pseudomonas aeruginosa 🦠👏High-throughput tRNA epitranscriptome profiling using mass spec on P. aeruginosa transposon insertion library and links with metabolic networks #microsky #rnasky doi.org/10.1093/nar/...
doi.org
tRNA modification profiling reveals epitranscriptome regulatory networks in Pseudomonas aeruginosa
Abstract. Transfer RNA (tRNA) modifications have emerged as critical post-transcriptional regulators of gene expression affecting diverse biological and di
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Reposted by Laura Álvaro-Llorente
Eduardo Rocha @epcrocha.bsky.social · 23/07/2025
Here's our new broad review on the extended mobility of plasmids, about all mechanisms driving and limiting their transfer. From conjugation to conduction, phage-plasmids to hitchers, molecular to evolutionary dynamics, ecology to biotech. The state of affairs. 1/9 academic.oup.com/nar/article/...
graphical abstract of the article the extended mobility of plasmids
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Laura Álvaro-Llorente @lauralvllo.bsky.social · 23/07/2025
Had an amazing time at #FEMS2025 last week, where I presented our latest findings on collateral sensitivity mediated by beta-lactamases ☯️ Big thanks to everyone who came by! So proud of my colleagues for their brilliant talks and posters ✨
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Laura Álvaro-Llorente @lauralvllo.bsky.social · 23/07/2025
The perfect summer read is here! 👇🏽
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Laura Álvaro-Llorente @lauralvllo.bsky.social · 02/07/2025
A must read paper! 👇
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Reposted by Laura Álvaro-Llorente
Jerónimo Rodríguez-Beltrán @jerorb.bsky.social · 02/07/2025
🚨🚨New paper out in @natcomms.nature.com!! Come for the first large-scale analysis of plasmid copy number across species, stay for one of the most intriguing results of my lab: universal scaling laws in plasmid biology! 📈🧬 👉 www.nature.com/articles/s41...
nature.com
Universal rules govern plasmid copy number - Nature Communications
Plasmids exhibit a broad range of sizes and copies per cell, and these two parameters appear to be negatively correlated. Here, Ramiro-Martínez et al. analyse the copy number of thousands of diverse b...
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Bacterial Genomics @bactgenrss.bsky.social · 02/07/2025
Scaling laws of bacterial and archaeal plasmids www.nature.com/articles/s41...
nature.com
Scaling laws of bacterial and archaeal plasmids - Nature Communications
The capacity of a plasmid to express genes is constrained by parameters such as its length and copy number. Here, Maddamsetti et al. present a computational method that enables rapid and accurate dete...
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Reposted by Laura Álvaro-Llorente
Bacterial Genomics @bactgenrss.bsky.social · 02/07/2025
Universal rules govern plasmid copy number www.nature.com/articles/s41...
nature.com
Universal rules govern plasmid copy number - Nature Communications
Plasmids exhibit a broad range of sizes and copies per cell, and these two parameters appear to be negatively correlated. Here, Ramiro-Martínez et al. analyse the copy number of thousands of diverse b...
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Reposted by Laura Álvaro-Llorente
Nature Microbiology @natmicrobiol.nature.com · 26/06/2025
#NatMicroPicks E. coli making paracetamol from plastic waste! 🦠💊 A new biocompatible chemistry for plastic waste upcycling using microbes. #MicroSky #SynBio 🔧🧬 www.nature.com/articles/s41...
nature.com
New-to-nature biocompatible chemistry for plastic waste upcycling - Nature Chemistry
Synthetic and biological chemistry are traditionally seen as separate fields. Now, a biocompatible chemical reaction enables an engineered microbe to convert plastic waste into valuable compounds unde...
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Reposted by Laura Álvaro-Llorente
Rafal Mostowy @rafalmostowy.bsky.social · 26/06/2025
What determines who a phage can infect? We tackled this question for temperate phages of Klebsiella — a bacterial pathogen — using a genome-wide association study (GWAS) and a massive protein testing effort. 👇 A thread!
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Ana Elena Pérez-Cobas @anaelenaperezcobas.bsky.social · 29/04/2025
New mini-review on the respiratory microbiome and its contribution to human health from biotechnology 🫁🦠 @tmcoque.bsky.social @microbiotech.bsky.social enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/...
enviromicro-journals.onlinelibrary.wiley.com
The Respiratory Tract Microbiome and Human Health
The respiratory tract microbiome (RTM) trains the immune system and protects against infections. Changes in the RTM are linked to various respiratory diseases. High-throughput methodologies and compu...
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Reposted by Laura Álvaro-Llorente
Uli Klümper @ulikluemper.bsky.social · 28/03/2025
New antibiotic class discovered by researchers at @mcmasteruniversity.bsky.social & @illinoispress.bsky.social "A broad-spectrum lasso peptide antibiotic targeting the bacterial ribosome" in @nature.com Hope it can make it to market to help combat #AMR infections www.nature.com/articles/s41...
nature.com
A broad-spectrum lasso peptide antibiotic targeting the bacterial ribosome - Nature
A new lasso peptide antibiotic exhibits broad-spectrum activity against Gram-negative and Gram-positive bacteria by interfering with bacterial protein synthesis, is unaffected by common resistanc...
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Reposted by Laura Álvaro-Llorente
David Bikard @dbikard.bsky.social · 04/03/2025
The Eligo team did it again! We just shared on biorxiv the work we did towards the development of a CRISPR-Cas therapy targeting Shiga Toxin producing E. coli (STEC). www.biorxiv.org/content/10.1...
biorxiv.org
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Uli Klümper @ulikluemper.bsky.social · 03/03/2025
A noncanonical intrinsic terminator in the HicAB toxin–antitoxin operon promotes the transmission of conjugative antibiotic resistance plasmids in @narjournal.bsky.social by Lin et al. academic.oup.com/nar/article/...
academic.oup.com
A noncanonical intrinsic terminator in the HicAB toxin–antitoxin operon promotes the transmission of conjugative antibiotic resistance plasmids
Abstract. Conjugative plasmids, major vehicles for the spread of antibiotic resistance genes, often contain multiple toxin–antitoxin (TA) systems. However,
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