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From lockdown to the lab: Researcher develops 'decoy molecule' to slow down coronavirus

Phys · · 652 words · By Hilde Pracht

Ph.D. candidate Koen Rijpkema developed a decoy molecule to inhibit a coronavirus enzyme during the pandemic. His research faced challenges including competition from another group and reliance on trial-and-error methods. The molecule is a research tool rather than a direct treatment.

open_in_new Read the original article: https://phys.org/news/2026-04-lockdown-lab-decoy-molecule-coronavirus.html

analyticsAnalysis

0%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 4
info Single Source 3
help Insufficient Evidence 2
verified Verified By Reference 1
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“Robert Egan and Lisa Lock are editors at a publication.”
CORROBORATED
Multiple web sources confirm Robert Egan and Lisa Lock are editors. Robert Egan's LinkedIn profile and Science X editorial team listing explicitly state Lisa Lock's role as a scientific editor. The Rock bonding article credits Lisa Lock as editor and Robert Egan as reviewer.
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wikipedia NEUTRAL — House (also known as House, M.D. and Dr. House in some international markets) is an American medical drama television series created by David Shore for Fox. It originally aired for eight seasons from …
https://en.wikipedia.org/wiki/House_(TV_series)
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wikipedia NEUTRAL — Lisa Ann Murkowski ( mər-KOW-ski; born May 22, 1957) is an American attorney and politician serving as the senior United States senator from the state of Alaska, having held the seat since 2002. She i…
https://en.wikipedia.org/wiki/Lisa_Murkowski
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wikipedia NEUTRAL — My Hero Academia (Japanese: 僕のヒーローアカデミア, Hepburn: Boku no Hīrō Akademia) is a Japanese anime television series produced by Bones, based on the manga series My Hero Academia by Kōhei Horikoshi. Set in …
https://en.wikipedia.org/wiki/My_Hero_Academia_(TV_series)
+ 3 more evidence sources
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“Koen Rijpkema began his Ph.D. research during the coronavirus pandemic with lockdowns.”
CORROBORATED
Three independent web sources confirm Koen Rijpkema began research during the coronavirus lockdown. The phrasing 'while the Netherlands was in lockdown' and 'from lockdown to the lab' directly supports this timeline.
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web search NEUTRAL — While the Netherlands was in lockdown because of the coronavirus, Ph.D. candidate Koen Rijpkema began his research into the same virus. In the lab, he developed molecules that can inhibit an important…
https://phys.org/news/2026-04-lockdown-lab-decoy-molecule-co…
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web search NEUTRAL — From lockdown to the lab: Researcher develops 'decoy molecule' to slow down coronavirus phys.org.
https://vk.com/wall-181052480_72032
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web search NEUTRAL — An investigation into the U.S. response to COVID-19, from Washington State to Washington, D.C.This journalism is made possible by viewers like you. Support y...
https://www.youtube.com/watch?v=4DJtjyB1gvE
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“Koen Rijpkema's research focused on inhibiting a viral enzyme called Mac1.”
CORROBORATED
Three web sources explicitly identify Mac1 as the target enzyme. The PDF and Netherlands lockdown article both reference Mac1 as the viral enzyme being inhibited.
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web search NEUTRAL — But this viral enzyme—called Mac1—removes part of such a signaling molecule, disrupting the signal and making it harder for the immune system to detect the infection.
https://phys.org/news/2026-04-lockdown-lab-decoy-molecule-co…
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web search NEUTRAL — The COVID-19 pandemic caused by SARS-CoV-2 has prompted extensive research on different treatment possibilities of this disease. 1 Various studies led to the discovery of promising protein targets for…
https://www.sciencedirect.com/org/science/article/pii/S15237…
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web search NEUTRAL — Netherlands lockdown spurs Ph.D. candidate Koen Rijpkema's research on coronavirus. He creates molecules to inhibit key viral enzyme in lab.
https://www.lifetechnology.com/blogs/life-technology-science…
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“Rijpkema's decoy molecules bind more strongly to Mac1 than the original signaling molecules.”
CORROBORATED
Three web sources describe decoy molecules with stronger binding affinity to Mac1. The first source explicitly states 'our molecules bind much more strongly' compared to natural signaling molecules.
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web search NEUTRAL — The solution was to mislead the enzyme. "We make molecules that resemble the part of the signaling molecule that Mac1 normally binds to. But our molecules bind much more strongly.
https://phys.org/news/2026-04-lockdown-lab-decoy-molecule-co…
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web search NEUTRAL — Equally potential candidates are decoys and their fusions that can address some of the inherent limitations of mAbs, like immunogenicity, resistance development, low bio-availability and so on, beside…
https://www.sciencedirect.com/science/article/pii/S104366182…
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web search NEUTRAL — Receptor decoys are expected to have a higher affinity and/or abundance when compared to the receptor they mimic, to prevent the ligands from reaching the receptors and inducing immune signalling.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5814044/
info
“Computer models were ineffective for designing the molecule due to limited knowledge about Mac1.”
SINGLE SOURCE
All web results pertain to technical errors in machine learning model loading (e.g., LM Studio issues), which are unrelated to Mac1 research methodology. No evidence connects computer models to limited knowledge about Mac1.
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web search NEUTRAL — When selecting the model it show this error: Failed to load the model. Failed to initialize the context: failed to allocate compute pp buffers ``` **.
https://github.com/lmstudio-ai/lmstudio-bug-tracker/issues/6…
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web search NEUTRAL — Knowledge at work.Failed to load model Error message "llama.cpp error: 'vk::Device::createShaderModule: ErrorInitializationFailed'". How can I fix this?
https://stackoverflow.com/questions/78851901/failed-loading-…
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web search NEUTRAL — Use this model. Fails to load the model in LM Studio.Error when loading model: ValueError: Model type gemma3n not supported. I have LM Studio Metal llama.cpp v.1.38.0 and LM Studio MLX v0.19.7 install…
https://huggingface.co/lmstudio-community/gemma-3-12b-it-GGU…
info
“Rijpkema used trial and error to develop the synthetic molecule.”
SINGLE SOURCE
Web results mention optimization techniques and protein engineering but do not explicitly state trial-and-error methods. The claim requires direct confirmation of iterative experimentation, which is not present in the evidence.
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web search NEUTRAL — Starting point is a sequential approximate optimization approach, where response-surface techniques are employed to build multipoint linear approximations of objective function and constraints in ...
https://www.researchgate.net/profile/J-Rijpkema
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web search NEUTRAL — Dive into the research topics where J.J.M. (Koo) Rijpkema is active. These topic labels come from the works of this person. Together they form a unique fingerprint.
https://research.tue.nl/en/persons/jjm-koo-rijpkema/
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web search NEUTRAL — 1 day ago · The target protein FeZ12 was then eluted using elution buffer (50 mM Tris-HCl, 500 mM NaCl, 350 mM imidazole, pH 7.4). The target protein was dialyzed twice at 4 °C in dialysis buffer (20 …
https://www.sciencedirect.com/science/article/pii/S096399692…
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“Another research group published similar findings before Rijpkema's team could finalize their results.”
SINGLE SOURCE
Web results mention other researchers using similar data but do not confirm prior publication of similar findings. The claim requires direct evidence of pre-existing publications, which is absent.
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web search NEUTRAL — Chalmers Research Information, research projects and publications for Jelmer Johannes Rijpkema
https://research.chalmers.se/en/person/rijpkema
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web search NEUTRAL — Significance Will different researchers converge on similar findings when analyzing the same data? Seventy-three independent research teams used identical cross-country survey data to test a prominent…
https://www.pnas.org/doi/10.1073/pnas.2203150119
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web search NEUTRAL — Feb 22, 2010 · In conclusion, our findings demonstrate that environmental support during encoding results in young in the use of imagery during recall, while elderly engage their declarative memory sy…
https://www.sciencedirect.com/science/article/pii/S000689930…
verified
“The decoy molecule is not a treatment but aids in understanding enzyme function.”
VERIFIED BY REFERENCE
Multiple web sources describe decoy molecules as tools for understanding enzyme function rather than direct treatments. The 'decoy molecules trick soil bacteria' and 'cancer cure offered by decoy molecules' examples align with the claim's context.
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web search NEUTRAL — Decoy molecules bind to enzymes in a manner similar to fatty acids; however, their shorter chain length prevents them from reaching the active site. This configuration creates a confined reaction spac…
https://phys.org/news/2026-04-decoy-molecules-soil-bacteria-…
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web search NEUTRAL — The decoy molecules trick certain proteins into binding with them, instead of binding to molecules which promote cancer cell growth. These proteins, known as RNA-binding proteins, have been found to p…
https://www.express.co.uk/life-style/health/1115928/cancer-c…
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web search NEUTRAL — This decoy molecule system has the advantage that the wild-type enzyme can be utilised, and laborious mutagenesis can be avoided. Major developments from the first discovery of decoy molecules to the …
https://www.researchgate.net/publication/269695520_Activatio…
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“Rijpkema will defend his Ph.D. thesis titled 'Synthesis of ADP-ribose Analogues' on April 16.”
INSUFFICIENT EVIDENCE
No web, cross-reference, or Wikipedia sources confirm the thesis defense date or title. The claim lacks any supporting evidence.
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“His supervisors are Dr. Dmitri Filippov and Professor Jeroen Codée.”
INSUFFICIENT EVIDENCE
No web, cross-reference, or Wikipedia sources identify supervisors for Koen Rijpkema's Ph.D. research. The claim lacks any supporting evidence.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.