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Johan Duchêne

@johanduchene.bsky.social
3.1K followers 3.3K following 282 posts

Dad, Husband & Scientist | Immunology, Inflammation, Chemokines & Atypical ChemoKine Receptors (ACKRs) | Research & Meta-Research | University of Munich (LMU) Molecular Inflammation Lab duchene.ipek-research.com

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Reposted by Johan Duchêne
Martin Plöderl @ploederl.bsky.social · 01/10/2026
🚨 Paper Alert 🚨 Our new study on the impact of a single small zombie trial on fluoxetine's overall efficacy estimation is out. With great colleagues @floriannaudet.bsky.social @richlyus.bsky.social and Gert van Valkenhoef 🧟‍♂️🧟‍♀️🧟 A longer 🧵 (1/n)
onlinelibrary.wiley.com
A Re‐Appraisal of Three Network Meta‐Analyses to Explain the Discrepancy in Findings for the Efficacy of Fluoxetine for the Treatment of Depression in Children and Adolescents
Objective To explain discrepant findings for fluoxetine's efficacy in three influential network meta-analyses (NMAs) of treatments for pediatric depression, which led to conflicting clinical recomme.....
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Florian Naudet @floriannaudet.bsky.social · 02/10/2026
🔥 OUR STUDY FEATURED IN NATURE NEWS What if one flawed zombie trial 🧟 helped shape the evidence for treating depression in children? Quote : "Elia Abi-Jaoude, [...] calls the paper a “slam-dunk study”. “I hope it will get wide exposure” he says."
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PLOS Biology @plosbiology.org · 11/09/2026
Modern #ScientificPublishing often incentivizes overstating results at the expense of ensuring rigor. @maxkrummel.bsky.social &co test #DiscoveryStack, which seeks to realign #PeerReview with its core purpose by separating the assessment of quality & impact @plosbiology.org 🧪 buff.ly/1GRnb4b
Top: The Discovery Stack model includes three sequential phases: 1) Quality Review, 2) Author Response, and 3) Impact Review. Bottom left: Eighteen manuscripts were reviewed in the pilot. Manuscripts are grouped according to recruitment source and author participation, with the number of completed Quality and Impact reviews for each manuscript depicted. Bottom right: Number of Quality and Impact reviews completed per manuscript.
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Johan Duchêne @johanduchene.bsky.social · 12/09/2026
How paper mills fake data, manipulate images, bypass peer review and undermine trust in science. An investigation by German Quarks show with English subtitles. youtu.be/Ub2eY8EhTEU?...
youtu.be
Dieses Experiment hat (leider) funktioniert … | Studio Q
YouTube video by Quarks
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Johan Duchêne @johanduchene.bsky.social · 09/09/2026
The 2026 Lasker-Bloomberg Public Service Award honors Michael J. Fox (Michael J. Fox Foundation for Parkinson’s Research) for empowering patients’ voices and accelerating research to find improved therapies and a cure for Parkinson’s disease. laskerfoundation.org/winners/park...
laskerfoundation.org
Parkinson’s disease research advocacy - Lasker Foundation
Michael J. Fox
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Johan Duchêne @johanduchene.bsky.social · 26/08/2026
Wow! Only Good Antibodies has developed a new tool that lets you see, directly in a paper, which antibodies were tested and validated. A tool that comes at the right time, given all the issues surrounding antibody validation. Definitively a tool to get onlygoodantibodies.co.uk/extension/
onlygoodantibodies.co.uk
Browser Extension — Only Good Antibodies
A free browser extension that marks antibodies cited in a paper with their knockout-controlled validation status, for the application they were used in.
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Johan Duchêne @johanduchene.bsky.social · 25/08/2026
One more time!
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Johan Duchêne @johanduchene.bsky.social · 31/07/2026
An anti-inflammatory drug did not reduce the risk of cardiovascular events. The Phase 3 ZEUS trial showed that Ziltivekimab failed to reduce MACE. An important result for cardiovascular immunology that will trigger plenty of discussion. www.novonordisk.com/news-and-med...
novonordisk.com
News Details
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Reposted by Johan Duchêne
Sholto David @sholtodavid.bsky.social · 21/07/2026
Today I'm posting a blog about another ridiculous antibody blunder. Dozens of papers in the senescence and ageing field have mistakenly used an antibody for E. coli β-galactosidase when trying to stain for the human protein with the same name. forbetterscience.com/2026/07/21/d...
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Johan Duchêne @johanduchene.bsky.social · 19/07/2026
TGFβ signals through TGFBR2 to drive fibrogenesis. Reliable TGFBR2 antibodies are essential for studying disease mechanisms and developing new therapies. 4 of 11 commercial antibodies recognized TGFBR2 specifically. #AntibodyValidation here the report: zenodo.org/records/20077560
TGFBR2 antibody screening by western blot using protein lysates.

Protein lysates from A549 WT and TGFBR2 KO cells were collected, and 30μg of protein was used for western blot with the indicated TGFBR2 antibodies. The Ponceau stained transfers of each blot are presented to show equal loading of WT and KO samples. Antibody dilutions were chosen according to the recommendations of the antibody supplier. Antibody dilutions used: ab184948** at 1/1000, ab259360** at 1/1000, ab270440** at 1/500, ARP44743_T100 at 1/500, 41896S** at 1/1000, GTX129909 at 1/1000, 66636-1-Ig* at 1/1000, MAB2411* at 1/500, 701683** at 1/500, MA5-51441** at 1/1000, MA5-55343** at 1/1000. Predicted band size: 64.6kDa. ** = recombinant antibody, * = monoclonal antibody.
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Johan Duchêne @johanduchene.bsky.social · 03/07/2026
A patient with WHIM syndrome experienced spontaneous disease correction after massive hemorrhagic shock. Read the fascinating story in NEJM: tinyurl.com/WHIM-NEJM 🧪
tinyurl.com
Somatic Genetic Rescue of Immunodeficiency in WHIM Syndrome | NEJM
A patient with WHIM syndrome, caused by CXCR4 chemokine receptor hyperactivity, had sustained remission after splenic rupture. A somatic mutation produced CXCR4 haploinsufficiency, suggesting allel...
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Johan Duchêne @johanduchene.bsky.social · 03/07/2026
A patient with metastasis achieved complete remission without anti-cancer treatment. After open-heart surgery complicated by an infection, all metastases disappeared. Could a surgery-associated immune activation triggered an anti-tumor response? tinyurl.com/Surgery-Cancer
tinyurl.com
Complete regression of metastatic melanoma in a patient following open-heart surgery with an infective complication
A man in his mid 60s with a history of resected primary cutaneous melanoma then developed metastatic BRAF V600E mutant disease involving lymph nodes, liver and bone. He was unable to tolerate 2 months...
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Johan Duchêne @johanduchene.bsky.social · 02/07/2026
Altered Antibody Validation Data on Vendor Sites Alarms Researchers. After several examples of undisclosed alterations in reagent suppliers’ antibody catalogues surfaced, researchers call for transparency to rebuild trust. www.the-scientist.com/altered-anti...
the-scientist.com
Altered Antibody Validation Data on Vendor Sites Alarms Researchers | The Scientist
After several examples of undisclosed alterations in reagent suppliers’ antibody catalogues surfaced, researchers call for transparency to rebuild trust.
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Johan Duchêne @johanduchene.bsky.social · 25/06/2026
The time-of-day immunotherapy study has been retracted. It was the only randomized trial supporting improved survival with morning administration of cancer immunotherapy. Nature Medicine concluded that the extent and nature of the concerns justified retraction. 🧪 www.nature.com/articles/s41...
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Reposted by Johan Duchêne
C&EN (Chemical & Engineering News) @cenmag.bsky.social · 07/06/2026
A group of research integrity activists say they have found widespread evidence of image manipulation in Thermo Fisher Scientific’s catalog of antibody reagents. #chemsky 🧪
cen.acs.org
Sleuths say Thermo Fisher doctored data to sell antibodies
Apparent manipulation of validation images in reagent catalog concerns researchers
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Reposted by Johan Duchêne
Sholto David @sholtodavid.bsky.social · 06/06/2026
I am sending an open letter to Thermo Fisher. Their response to my response to their manipulated western blot is bullying and petty. Yes, this western blot really is manipulated, it is unfair on me to say otherwise. I don't make those accusations lightly, and I have a (minor) reputation to defend.
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Reese Richardson @reeserichardson.bsky.social · 05/06/2026
The Thermo Fisher situation keeps getting worse. We've now collected 450+ problematic images presented as verification data in TF's antibody catalog. This includes: 🖌️ Dozens more images with duplications or painting 🖨️ Hundreds of blots that all share the same background (behold slideshow below)
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Reposted by Johan Duchêne
SkepSci @skepsci.bsky.social · 03/06/2026
See also NRF2 and Nrf2 (Nuclear Respiratory Factor vs. Nuclear factor erythroid 2-related factor 2). Totally different proteins that get mixed up all the time! pubmed.ncbi.nlm.nih.gov/38815934/
pubmed.ncbi.nlm.nih.gov
Unraveling the NRF2 confusion: Distinguishing nuclear respiratory factor 2 from nuclear erythroid factor 2 - PubMed
In recent years, the acronym NRF2 has garnered significant attention in scientific discourse. However, this attention has occasionally led to confusion due to the existence of two distinct proteins sh...
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Johan Duchêne @johanduchene.bsky.social · 02/06/2026
100s labs ordered the wrong "p16" antibody. They wanted to study p16-INK4a, but bought p16-ARC antibodies. 312 papers got it wrong. Now the literature is polluted with false mechanistic pathways. As a reminder: validate your reagents. But also read the datasheet and use your brain.
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Reposted by Johan Duchêne
Sholto David @sholtodavid.bsky.social · 02/06/2026
Today I'm posting a new blog about an astonishing scientific own goal. Hundreds of papers have reported using a totally wrong antibody to investigate the tumor suppressor p16. This mistake has happened because scientists have muddled the names of two proteins. forbetterscience.com/2026/06/02/m...
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Jennifer Byrne @jabyrnesci.bsky.social · 01/06/2026
New @biorxivpreprint.bsky.social preprint led by @pranujanp.bsky.social, studying errors such as incorrect primer sequences and contaminated #CellLines in #circRNA papers in high impact factor journals. We found reagent errors in 51% of n=118 circRNA papers in high IF journals in 2022 (1/4)🧪
biorxiv.org
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Retraction Watch @retractionwatch.com · 30/05/2026
Weekend reads: White House proposal prohibits federal funds for APCs; sleuths say Thermo Fisher doctored data; sleuth in China takes to social media
retractionwatch.com
Weekend reads: White House proposal prohibits federal funds for APCs; sleuths say Thermo Fisher doctored data; sleuth in China takes to social media
If your week flew by — we know ours did — catch up here with what you might have missed. The week at Retraction Watch featured: Critics of birdsong study fight to be named in Nature’s retraction El…
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Laurel Oldach @laureloldach.bsky.social · 28/05/2026
Thermo Fisher has responded to research integrity activists who spotted apparent manipulation in its antibody catalog: "In ... preparing antibody images for publication on our website, some images may have been adjusted to clarify for presentation purposes." More: cen.acs.org/research-int...
Headline "Sleuths say Thermo Fisher doctored data to sell antibodies," subhead "Apparent manipulation of validation images in reagent catalog concern researchers," byline Laurel Oldach, image of a pipette loading an SDS-PAGE gel for a western blot
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Dan Garisto @dangaristo.bsky.social · 29/05/2026
Unreliable and underperforming antibodies are a longstanding problem, so while the reveal of apparently manipulated antibody data in Thermo Fisher's catalog was a shock, the frustration it sparked among many researchers is perhaps no surprise. My reporting:
nature.com
Science sleuths uncover more than 100 suspicious images in Thermo Fisher antibody catalogue
Scientists have long worried about the reliability of commercial antibodies, and the latest findings have sparked fresh concerns.
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Reposted by Johan Duchêne
Reese Richardson @reeserichardson.bsky.social · 29/05/2026
@dangaristo.bsky.social reports on the brouhaha for @nature.com : www.nature.com/articles/d41...
nature.com
Science sleuths uncover more than 100 suspicious images in Thermo Fisher antibody catalogue
Scientists have long worried about the reliability of commercial antibodies, and the latest findings have sparked fresh concerns.
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Johan Duchêne @johanduchene.bsky.social · 29/05/2026
www.nature.com/articles/d41...
nature.com
Science sleuths uncover more than 100 suspicious images in Thermo Fisher antibody catalogue
Scientists have long worried about the reliability of commercial antibodies, and the latest findings have sparked fresh concerns.
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Johan Duchêne @johanduchene.bsky.social · 28/05/2026
Every scientist should know: • antibodies (Abs) can bind the wrong target • non-validated Abs can lead to false conclusions • Abs should be validated before use YCharOS tests commercial Abs in KO cell lines ycharos.com Only Good Antibodies makes the data easy to browse onlygoodantibodies.co.uk
onlygoodantibodies.co.uk
Only Good Antibodies — Free Antibody Characterisation Database
A free, searchable database of knockout-validated antibody characterisation data covering 155 genes and 1617 antibodies. Includes a free e-learning Academy.
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Reposted by Johan Duchêne
Reese Richardson @reeserichardson.bsky.social · 28/05/2026
TL;DR: We've identified more than 100 cases of apparent manipulation in Thermo Fisher Scientific's antibody verification data. @sholtodavid.bsky.social @johanduchene.bsky.social reeserichardson.blog/2026/05/28/h...
reeserichardson.blog
How much of Thermo Fisher’s antibody data has been manipulated?
We’ve documented more than 100 instances of apparent data manipulation in Thermo’s catalog
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Reposted by Johan Duchêne
tsoussi.bsky.social @tsoussi.bsky.social · 25/05/2026
This is a very good question. Several other antibodies produced in my lab (X77 specific for Xenopus p53, for example), are also distributed by Thermofisher. It is funny that the datasheet showing the epitope was also an internal document. We suspect that someone in our lab released these clones.
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Reposted by Johan Duchêne
tsoussi.bsky.social @tsoussi.bsky.social · 24/05/2026
In 1994, my lab generated this antibody that is now sold by Thermo Fisher (HR231). They are marketing this reagent without my authorization, without any agreement or acknowledgment of our original work. www.thermofisher.com/antibody/pro... Legros Y, Lafon C, Soussi T. Oncogene. 1994;9:2071-2076.
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Reese Richardson @reeserichardson.bsky.social · 21/05/2026
@johanduchene.bsky.social @sholtodavid.bsky.social Spent the last hour looking, found ten more apparently manipulated Western blots in Thermo Fisher's antibody verification data (across eight different catalogued products). Thread below. www.thermofisher.com/antibody/pro...
Apparent manipulation in the antibody verification data in Thermo Fisher's online catalog
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Johan Duchêne @johanduchene.bsky.social · 21/05/2026
@sholtodavid.bsky.social Have you seen this WB from ThermoFisher? Still anti-p53 antibody, but another clone (MA-12648 instead MA5-12557). It also looks like that the band in lane 3 was rotated and reused in lane 4. Moreover, it seems that same band was used for the 2 different clones.
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Sholto David @sholtodavid.bsky.social · 17/05/2026
Surprised to discover that Thermo Fisher appears to show a fake western blot for the validation of one of their p53 antibodies. I've added a diagram to show the very similar bands. This does not appear to be one of the "published figures" but their own internal data.
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Johan Duchêne @johanduchene.bsky.social · 17/05/2026
@oga-community.bsky.social @ycharos.bsky.social
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Johan Duchêne @johanduchene.bsky.social · 14/05/2026
TREM2+ macrophages have rapidly emerged as key regulators in diseases. Studying them requires specific antibodies. Among 14 tested antibodies in KO cell lines by WB, 5 are specific. Pick up the right human TREM2 Antibody. Full report: tinyurl.com/TREM2Ab Or here: tinyurl.com/OGA-TREM2
Human TREM2 antibody screening by western blot on lysate.

10 μg of protein from PMA-treated THP-1 WT and TREM2 KO were processed for western blot with the indicated TREM2 antibodies. The Ponceau stained transfers of each blot are presented to show equal loading of WT and KO and protein transfer efficiency from the acrylamide gels to the nitrocellulose membrane. Antibody dilutions were chosen according to the recommendations of the antibody supplier. Antibody dilutions used: ab209814** at 1/1000; ab318262** at 1/1000; ARP49413_P050 at 1/1000; MAB11618** at 1/200; MAB17291R** at 1/500; 29715* at 1/1000; 55739** at 1/1000; 91068** at 1/1000; GTX637386** at 1/1000; GTX637387** at 1/1000; ZRB2124** at 1/1000; 68723-1-Ig* at 1/2000; 83438-6-RR** at 1/2000; MA5-51494** at 1/200. Predicted band size: 25.4 kDa. **= recombinant antibody, *= monoclonal antibody.
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Craig Kaplan @triggerloop.bsky.social · 11/05/2026
Another example of how technique variation can really matter. Here, another example of use of cycloheximide in ribosome profiling can lead to artifacts that affect interpretation. Really careful experiments to suggest that 2018 paper in Nature likely mistaken.
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Johan Duchêne @johanduchene.bsky.social · 01/05/2026
Data manipulation allegations hit an approved autoimmune drug. Tavneos for vasculitis is now under scrutiny for data changes that may have flipped a negative trial positive FDA: – doubts about efficacy – proposed market withdrawal - worries about safety www.science.org/content/blog... 🧪
science.org
The FDA Cracks Down on Tavneos
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Reposted by Johan Duchêne
IPEK @ipekresearch.bsky.social · 29/04/2026
📢Looking forward to our next CRC 1123 Keynote Lecture 🧑‍🏫by Clément Cochain next week on TREM2+ macrophages in atherosclerosis and MI www.ipek-research.com/news-reports... @dfg.de @steffenslab.bsky.social @ipekresearch.bsky.social @isd-research.bsky.social
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Johan Duchêne @johanduchene.bsky.social · 25/04/2026
All of the images were FABRICATED by ChatGPT Images 2.0, each with a single prompt. How AI will affect science?🧪 mikhoelias.substack.com/p/how-ai-bre...
mikhoelias.substack.com
How AI Breakthrough Could Shake the Scientific Publishing Process
Recent Image generation and LLM models are so good they can produce digital assets nearly undistinguishable from genuine ones.
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Reposted by Johan Duchêne
Nature @nature.com · 24/04/2026
Failure is part and parcel of research, but discussing it sometimes seems to be taboo in science. It doesn’t need to be go.nature.com/3QHXZvk
go.nature.com
We need to talk about failure in science
Failure is part and parcel of research, but discussing it sometimes seems to be taboo in science. It doesn’t need to be.
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TRAstonDrs @castltrastondrs.medsky.network · 16/04/2026
#Medsky🧪 #Publichealth @nature.com Some disease-predictors use dodgy data . Dozens of AI models designed to predict a person’s risk of #stroke or #diabetes are trained on dubious datasets. Researchers found that many such models used one of two open-access health datasets
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Johan Duchêne @johanduchene.bsky.social · 13/04/2026
“All models are wrong, but some are useful” - George E.P. Box Are we misled by myocardial infarction (MI) models? Open-chest MI triggers systemic inflammation that can mask MI-specific immune responses Minimally invasive MI tells a different story Read our new preprint🧪 doi.org/10.64898/202...
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Nicola Low @nicolamlow.bsky.social · 11/04/2026
🧪 #BadJournalism Headline: Genetics don’t explain variability in weight-loss jab effects “The authors’ model suggests… genetics adding only a modest incremental contribution.” Boring non-genetic factors such as sex, drug type, dose and duration most important www.theguardian.com/science/2026...
theguardian.com
Genetics may help explain why results from weight-loss jabs vary, say scientists
Data on almost 28,000 patients suggests understanding gene variations could improve treatments for obesity
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Johan Duchêne @johanduchene.bsky.social · 10/04/2026
If you’re using 10x Genomics (Flex v1) for scRNA-seq, this study is a must-read. 🧪 It uncovers a key artefact: • Probe barcodes themselves introduce bias • Some barcodes systematically alter gene expression signals • Apparent DEGs may be technical, not biological www.biorxiv.org/content/10.6...
biorxiv.org
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Dorothy Bishop @deevybee.bsky.social · 18/02/2024
major issues with antibodies used in #neuroscience research www.thetransmitter.org/open-neurosc... #reproducibility
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Johan Duchêne @johanduchene.bsky.social · 27/03/2026
🔬 Are you using the right antibody for your experiments? Only Good Antibodies helps researchers identify specific antibodies 🧪 1496 antibodies against 147 proteins tested so far. Check now oga-website.onrender.com OGA is powered by YCharOS
oga-website.onrender.com
Only Good Antibodies — Free Antibody Characterisation Database
A free, searchable database of knockout-validated antibody characterisation data covering 147 genes and 1496 antibodies. Includes a free e-learning Academy.
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Johan Duchêne @johanduchene.bsky.social · 24/03/2026
A step forward for cardio-immunology! Our recent preprint shows: Standard MI models distort neutrophil responses through surgical inflammation. A minimally invasive model better mirrors patients and reveals immature neutrophils driving post-MI damage. Here is link www.biorxiv.org/content/10.6...
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Johan Duchêne @johanduchene.bsky.social · 18/03/2026
How specific are therapeutic monoclonal antibodies? In a study of 174 FDA-approved antibodies, 28% showed off-target binding. Surprisingly, even the famous pembrolizumab (anti–PD-1) binds another protein (TDGF1). www.sciencedirect.com/science/arti...
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Waggoner Lab @labwaggoner.bsky.social · 14/03/2026
@biorxivpreprint.bsky.social A Genetic Tool for Specific Tracking of Mature Neutrophils www.biorxiv.org/content/10.6...
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Thiago Carvalho @cyrilpedia.bsky.social · 13/03/2026
I'd like to see this problem analysed at the single cell multi-omics level 'Advances in research technolo- gies are crucial for the scientific enterprise but have an unintended consequence: when pow- erful techniques become widely available, they tend to be applied without a good question in mind.'
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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