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Aleksandra Deczkowska

@adeczkowska.bsky.social
164 followers 160 following 28 posts

Busy @aleksdelab.bsky.social @pasteur.fr || single cells and neuro-immune stuff II #firstgen #ally🏳️‍🌈🏳️‍⚧️

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Aleksandra Deczkowska @adeczkowska.bsky.social · 06/03/2026
wow! so cool! congratulations!
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Aleksandra Deczkowska @adeczkowska.bsky.social · 06/03/2026
well-deserved!
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Aleksandra Deczkowska @adeczkowska.bsky.social · 26/02/2026
It was my pleasure to visit you!
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Aleksandra Deczkowska @adeczkowska.bsky.social · 09/02/2026
"Explaining something with the wrong model can be worse than not explaining it at all." www.nature.com/articles/s41...
nature.com
On the balance of knowledge - Nature Reviews Immunology
Ruslan Medzhitov shares his thoughts on the balance between generating data and developing theories in immunology, with a focus on exploring the rules that govern complex systems.
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Paris Brain Institute - Institut du Cerveau @institutducerveau.bsky.social · 05/02/2026
🎙️ Morgane THION, Collège de France, will talk about "microglia in the developing brain: from colonization to functions" on Monday, 9 February, at 11am at Paris Brain Institute. 👉 More information: parisbraininstitute.org/agenda/scie…
parisbraininstitute.org
Scientific lectures: Morgane THION | Paris Brain Institute
Speaker : Morgane THION, College de France"Microglia in the developing brain: from colonization to functions"
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Institut Pasteur | 130 years of biomedical research @pasteur.fr · 30/01/2026
What if the immune system held a key to brain health ? 🧠 Research by Aleksandra Deczkowska @adeczkowska.bsky.social at the Institut Pasteur shows constant immune–brain dialogue, and how modulating immunity could help prevent or treat neurological diseases.
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Waggoner Lab @labwaggoner.bsky.social · 26/01/2026
Tumor-associated macrophages directly stimulate neurite outgrowth, revealing a dual role in enhancing intratumoral nerve growth and promoting neural repair after severe spinal cord injury @cp-immunity.bsky.social www.cell.com/immunity/ful...
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Johanna Joyce @johannajoyce.bsky.social · 22/01/2026
Why do so few cancer cells manage to form metastases - and what helps the rare ones succeed? Delighted to share our first publication of 2026 🎉🎉, led by the outstanding @lbejarano.bsky.social 🤩, where we reveal some insights into this - focusing on brain metastasis 🧠🧪🔬 www.cell.com/cell-reports...
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Nature @nature.com · 18/01/2026
A researchers’ propensity for risky projects is passed down to their doctoral students — and stays with trainees after they leave the laboratory go.nature.com/4qvaffO
go.nature.com
PhD students’ taste for risk mirrors their supervisors’
Nature - Learned risk-taking behaviours can persist for years after leaving the lab — and even after taking on a new research topic.
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Carolyn Bertozzi @carolynbertozzi.bskyverified.social · 20/12/2025
Multidisciplinary training, over time, produces the highest impact people www.science.org/doi/10.1126/...
science.org
Recent discoveries on the acquisition of the highest levels of human performance
Scientists have long debated the origins of exceptional human achievements. This literature review summarizes recent evidence from multiple domains on the acquisition of world-class performance. We re...
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Nature Microbiology @natmicrobiol.nature.com · 19/12/2025
Microbes weaponizing secondary metabolites to make rivals vulnerable to phage attack 🧪🦠 www.nature.com/articles/s41...
nature.com
Streptomyces secretes a siderophore that sensitizes competitor bacteria to phage infection - Nature Microbiology
A secondary metabolite sensitizes competitor Bacillus subtilis to a wide panel of lytic phages by sequestering iron and preventing the activation of Spo0A.
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Thiago Carvalho @cyrilpedia.bsky.social · 15/12/2025
This #Preprint reports that B6 (but not wild mice) have a truncated PDL2, missing an active intracellular signalling domain: "Surprisingly, in C57BL/6J (B6) mice PD-L2 has only a 5-amino acid intracellular domain, and the same is true for several other laboratory mouse strains" #Immunology
biorxiv.org
PD-L2 Regulates Natural Antibody and IL-10 Secretion by B-1 cells
B-1 cells are innate-like lymphocytes that play a critical role in homeostasis by secreting natural antibodies, typically IgM, and immunosuppressive molecules such as IL-10. However, the regulation of...
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Oded Rechavi @odedrechavi.bsky.social · 15/12/2025
When your PI presents your work
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Aleksandra Deczkowska @adeczkowska.bsky.social · 10/12/2025
congratulations @dbikard.bsky.social !!! well deserved!
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Catherine Dulac @dulaclab.bsky.social · 09/12/2025
I am thrilled to share our latest work led by @zurisullivan.bsky.social in collaboration with @moffittlab.bsky.social ! We find that the brain encodes distinct, pathogen-specific sickness states across behavior, physiology, neural activity, and gene expression 1/6 www.biorxiv.org/content/10.6...
biorxiv.org
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Thibaut Brunet @thibautbrunet.bsky.social · 08/12/2025
Come to be our colleague! Center of Paris, excellent facilities, research spanning the whole range of basic and biomedical life science topics, enthusiastic and collaborative colleagues, crème brûlée every Friday... What else could one want?
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Institut Pasteur | 130 years of biomedical research @pasteur.fr · 08/12/2025
🔬 Call to create junior research groups at the Institut Pasteur Focus: Infectious diseases, host-microbe interactions, vaccines Special interest: AI methodologies 📅 Deadline: Feb 9, 2026 👥 2-12 years post-PhD Apply now 📝 research.pasteur.fr/en/call/crea... #JobOpportunity #Research
research.pasteur.fr
Creation of new junior research groups at the Institut Pasteur - Call for applications 2026 - Research
The Institut Pasteur is launching an international call to recruit new junior research group leaders leveraging cutting-edge transdisciplinary approaches to exploring infectious diseases, host-microbe...
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Jonathan Kagan @jkagan1.bsky.social · 07/12/2025
Evidence continues building that oxidized lipids drive inflammasome activities in health and disease.  A beautiful study shows a link to multiple sclerosis, with a role for inflammasomes and IL-1 in pathology.  Kudos to the authors on this exciting discovery. www.nature.com/articles/s41...
nature.com
Oxidized phosphatidylcholines deposition drives chronic neurodegeneration in a mouse model of progressive multiple sclerosis via IL-1β signaling - Nature Neuroscience
In this study, Yu et al. found that a positive feedback loop between oxidized phosphatidylcholine and IL-1β promotes chronic neurodegeneration in the central nervous system and could be a contributing...
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
We would like to thank our amazing collaborators @nicogaudenzio.bsky.social Xinzhong Dong, Martin Hasselblatt and Friederike Jonsson, members of @aleksdelab.bsky.social and amazing platforms @institutpasteur.bsky.social - would not happen without You!
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
Overall, activation of CP mast cells or CPEC secretion in early life derails brain development; therefore the presence of mast cells at the neonatal CP is a “vulnerability”, this is how pathologies associated with mast cell activation in neonates may exert their long lasting effect on the brain.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
Finally, using chemogenetics, we showed that triggering CPEC responses at birth leads to long-term cognitive alterations, highlighting the lasting impact of early-life immune activity at the brain’s borders
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
When we activated these neonatal mast cells, we saw a serotonin-dependent increase in CPEC secretion — along with CSF pollution by intracellular content.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
These mast cells were present only at birth and showed a connective-tissue–type phenotype.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
Next, to understand how immune cells shape CP function, we performed ligand–receptor analysis. This revealed that mast cells may directly interact with CP epithelial cells (CPECs) through serotonergic signaling.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
This is consistent with another (very) recent preprint from @bethstevenslab.bsky.social lab: www.biorxiv.org/content/10.1... but some pro-B and pre-B cells are still present in adult CP!
biorxiv.org
Early-life stromal niches orchestrate B lymphopoiesis at the brain’s borders
The dura mater serves as a critical immunological niche for the central nervous system, yet the mechanisms governing the emergence of this niche in early life remain understudied. Here, we chart the t...
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
By dissecting their subtypes, we discovered that these cells resemble developing B cells typically found in the bone marrow of adults.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
One striking change was a surge of B cells around P15, prompting us to examine them more closely.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
Using CITE-seq, we mapped the CP immune landscape across postnatal development and found that the CP is a highly dynamic niche with major shifts in immune cell composition.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
We wanted to understand how immune cells shape brain maturation through the choroid plexus (CP), a brain border which produces the CSF, key for brain development, and is exposed to peripheral immune factors.
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Aleksandra Deczkowska @adeczkowska.bsky.social · 03/12/2025
Excited to share our new preprint: “Local B cell maturation and mast cell regulation of choroid plexus function in early life” www.biorxiv.org/content/10.1... , initiated in the lab by Laetitia Travier and led by the one and only @fakesamir.bsky.social
biorxiv.org
Local B cell maturation and mast cell regulation of choroid plexus function in early life.
Postnatal development is a critical period for the maturation of the nervous and immune systems. The choroid plexus (CP) within the brain ventricles guides brain development through the production of ...
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Itai Yanai @itaiyanai.bsky.social · 02/12/2025
These are the 10 art classroom rules of Corita Kent (artist, teacher, social justice advocate and nun). They are true for any creative process, especially Rule 8: DON’T TRY TO CREATE AND ANALYZE AT THE SAME TIME. THEY’RE DIFFERENT PROCESSES. (i.e. night science / day science).
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bioRxiv Immunology @biorxiv-immuno.bsky.social · 30/11/2025
Early-life stromal niches orchestrate B lymphopoiesis at the brain's borders www.biorxiv.org/content/10.1101/202…
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Nature @nature.com · 28/11/2025
Nature research paper: iHALT unlocks liver functionality as a surrogate secondary lymphoid organ go.nature.com/3M7ctmb
go.nature.com
iHALT unlocks liver functionality as a surrogate secondary lymphoid organ - Nature
Liver-restricted viral infection in mice results in secondary lymphoid organ dormancy and the compensatory induction of specialized lymphoid tissue in the liver, the structural features and functional outputs of which are closely mirrored in humans.
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John Lukens @lukensjohnr.bsky.social · 28/11/2025
Microglial CLEC7A restrains amyloid beta plaque pathology in a mouse model of Alzheimer's disease alz-journals.onlinelibrary.wiley.com/doi/10.1002/... @alzdemjournals.bsky.social
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Itai Yanai @itaiyanai.bsky.social · 23/11/2025
PhD students and Postdocs: The Night Science Podcast (@nightsciencepod.bsky.social) is producing an episode highlighting young scientists talking about their creative process. DM me if you'd like us to consider you for this, & read below what PhD student Davis Garner will contribute! ⬇️
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Siegenthaler Lab @siegenthalerlab.bsky.social · 20/11/2025
Our work out in @devbiol.bsky.social, PDGFra is needed for 🧠 perivascular fibroblast development... ⬇️ perivascular fibroblast = ⬇️ perivascular macrophage...cross-talk? 👀 Led by Hannah Jones @hejcell.bsky.social w/ Kelsey Abrams, Sophia Kim, excited for more projects w/ @fantauzzolab.bsky.social!
Micrscopy images of cleared cerebral brain tissue showing penetrating blood vessels (white) in mice - magenta cells are perivascular fibroblasts and cyan cells are perivascular macrophages - in control mice, both cell types are near the vessel termini by postnatal day 10 but in 'cKO' mice that lack expression of a tyrosine kinase receptor PDGFRa in fibroblasts, both the fibroblasts and macrophages are only partially covering the vessels. From Figure 4 of our paper - https://authors.elsevier.com/a/1m7fa2mzTkyfS
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Aleksandra Deczkowska @adeczkowska.bsky.social · 15/11/2025
“it’s anxiety, have you tried nose yoga?”
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Princess Vimentin PhD | Cancer Biologist @princess-vimentin.bsky.social · 13/11/2025
We have come a long way. #Pinks
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Elizabeth Jacobs, PhD @elizabethjacobs.bsky.social · 10/11/2025
A study with data from ~14 million children shows that COVID19 infection is significantly more harmful to kids’ hearts than the vaccine. Marty Makary falsely alleged that “children died” because from COVID19 vaccine. Whomever told him that failed to account for SARS-CoV-2 infections. Link below.
Photo of chart demonstrating that the risks to inflammatory conditions, low platelets and blood clots are all higher in kids who had COVID19.
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Oded Rechavi @odedrechavi.bsky.social · 10/11/2025
You and the text you need to trim in order to meet the word limit
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Jonathan Kagan @jkagan1.bsky.social · 04/11/2025
Evidence continues to accumulate that mRNA can deliver immunostimulatory innate proteins. www.pnas.org/doi/suppl/10...
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Laura Cantini @cantinilab.bsky.social · 04/11/2025
Happy to share STORIES out now on Nature Methods STORIES learns cell fate landscapes from spatial tramscripromics data profiled at several time points, thus allowing prediction of future cell states. Led by Geert-Jan Huizing and Jules Samaran www.nature.com/articles/s41... @pasteur.fr
nature.com
STORIES: learning cell fate landscapes from spatial transcriptomics using optimal transport - Nature Methods
By learning a differentiation potential using an optimal transport-based approach, STORIES models and infers cell fate trajectories using spatiotemporal omics data.
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Cure Alzheimer's Fund @curealzheimersfund.bsky.social · 03/11/2025
During Alzheimer’s Disease Awareness Month, we honor the millions of individuals & families affected by Alzheimer’s, and the scientists working tirelessly to change its course. Each new finding increases our understanding of Alzheimer’s and brings us closer to a cure. #AlzheimersAwarenessMonth
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Aleksandra Deczkowska @adeczkowska.bsky.social · 31/10/2025
Just a regular thing at @pasteur.fr cantine.
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Trends in Immunology @cp-trendsimmuno.bsky.social · 29/10/2025
Immunology as a guide to human relationships #immunology
dlvr.it
Immunology as a guide to human relationships
This essay uses immunology to illuminate human relationships. Moving beyond self/non-self toward danger-based models, it draws parallels between cytokine communication and language, tolerance and forgiveness, microbiota diversity and coexistence. Recognizing these metaphors reveals pathways toward healthier connections within individuals, communities, and societies.
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François Leulier @francoisleulier.bsky.social · 28/10/2025
« … Un Français consomme en moyenne plus de 10 000 animaux au cours de sa vie alors qu’il en utilise indirectement seulement 2,5 en moyenne pour la recherche scientifique et biomédicale … »
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Institut Pasteur | 130 years of biomedical research @pasteur.fr · 23/10/2025
💚 Last night, the Institut Pasteur lit up its historic building in green: the color of Phelan‑McDermid syndrome. This rare genetic disorder is linked to developmental & language challenges and autism. It was here that researchers identified SHANK3, the gene behind the syndrome 🧬✨
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Gioele La Manno @gioelelamanno.bsky.social · 16/10/2025
🧠 The Lipid #Brain Atlas is out now! If you think #lipids are boring and membranes are all the same, prepare to be surprised. Led by @lucafusarbassini.bsky.social with Giovanni D'Angelo's lab, we mapped membrane lipids in the mouse brain at high resolution. www.biorxiv.org/cgi/content/...
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Oded Rechavi @odedrechavi.bsky.social · 07/10/2025
Fwd: Fwd: “I hope this email finds you well”
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Institut Pasteur | 130 years of biomedical research @pasteur.fr · 23/09/2025
SHERLOCK4HAT: a CRISPR-RNA test rapidly spots animal trypanosomes, boosting sleeping-sickness surveillance and protecting herds. Led by Institut Pasteur & partners, study in eLife. Details: www.pasteur.fr/en/home/rese...
Forme sanguine de Trypanosoma brucei, parasite flagellé responsable de la maladie du sommeil en l'Afrique Centrale. Microscopie électronique à balayage. 

Crédit :
Institut Pasteur/Thierry Blisnick, unité Biologie cellulaire des Trypanosomes. Acquisition à la Plate-Forme de Microscopie Ultrastructurale
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