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Retraction Watch

Tracking retractions as a window into the scientific process

Archive for the ‘czech republic’ Category

Researcher who tampered with investigation up to 8 retractions

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Journal of Medicinal ChemistryKarel Bezouška, the scientist who tried to derail an investigation into his work by breaking into a lab refrigerator has had an eighth paper retracted.

Here’s the notice for “Synthetic N-Acetyl-d-glucosamine Based Fully Branched Tetrasaccharide, a Mimetic of the Endogenous Ligand for CD69, Activates CD69+ Killer Lymphocytes upon Dimerization via a Hydrophilic Flexible Linker:” Read the rest of this entry »

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Written by Ivan Oransky

June 17, 2014 at 11:00 am

Seventh retraction appears for author who tampered with investigation

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bioorganicsKarel Bezouška, who tried tampering with an investigation into his work by breaking into a lab refrigerator, has had a seventh paper retracted.

Here’s the notice for “Carboxylated calixarenes bind strongly to CD69 and protect CD69+ killer cells from suicidal cell death induced by tumor cell surface ligands,” which was first published in Bioorganic & Medicinal Chemistry in 2010: Read the rest of this entry »

Written by Ivan Oransky

May 19, 2014 at 11:30 am

Author who broke into lab to tamper with investigation now up to half a dozen retractions

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Bioconjugate ChemistryKarel Bezouška, the scientist who tried to tamper with an investigation into his work by breaking into a lab refrigerator, has had his fifth and sixth papers retracted.

Here’s the notice from Bioconjugate Chemistry for 2012’s “Dimerization of an Immunoactivating Peptide Derived from Mycobacterial hsp65 Using N-Hydroxysuccinimide Based Bifunctional Reagents Is Critical for Its Antitumor Properties:” Read the rest of this entry »

Karel Bezouška, who broke into lab to tamper with investigation, has JACS paper retracted

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jacsat_v136i001.inddKarel Bezouška, who, as we noted last year “broke into a lab refrigerator so he could tamper with samples being used to try to replicate the experiments during the investigation,” has had his fourth paper retracted.

Here’s the notice, for “Synthesis of Multivalent Glycoconjugates Containing the Immunoactive LELTE Peptide: Effect of Glycosylation on Cellular Activation and Natural Killing by Human Peripheral Blood Mononuclear Cells,” in the Journal of the American Chemical Society (JACS): Read the rest of this entry »

Third retraction for Karel Bezouška, of lab break-in fame

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bichaw_v052i049.inddWe’ve found a third retraction for Karel Bezouška, the Czech scientist, who, as we reported this summer, broke into a lab in an attempt to tamper with experiments trying to replicate his own falsified data.

The article, “Molecular Characterization of Binding of Calcium and Carbohydrates by an Early Activation Antigen of Lymphocytes CD69,” had appeared in 2003 in Biochemistry. and has been cited 29 times, according to Thomson Scientific’s Web of Knowledge.

Here’s the retraction notice: Read the rest of this entry »

Written by amarcus41

December 13, 2013 at 11:30 am

Author stalemate in Czech DNA paper leads to retraction

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Franz Kafka

Okay, so it’s not quite Kafka, but a group of forensic geneticists from Prague’s Charles University has lost a paper in Folia Biologica (a journal from that famed institution where Kafka studied) over what appears to be a rather Byzantine dispute about authorship and the quality of the data.

The 2010 article, “DNA analysis of ancient skeletal remains” was written by a trio of authors from Charles University’s Department of Anthropology and Human Genetics. According to its abstract: Read the rest of this entry »

Written by amarcus41

August 1, 2013 at 12:00 pm

Second retraction for Czech fraudster Bezouska, who broke into lab

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bmc biotechEarlier this month we wrote about the retraction by Nature of a 19-year-old paper by Karel Bezouska, a former star researcher at Prague’s Charles University whose “dangerous and irresponsible deviations” from acceptable practice went as far as tampering with refrigerated samples to cover his tracks.

BMC Biotechnology has retracted another Bezouska paper, this one from 2011. He’s the second author on the article, titled “Heterologous expression, purification and characterization of nitrilase from Aspergillus niger K10.”

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Researchers get a mulligan: JBC paper withdrawn sans explanation

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jbc july 2013A group of authors has withdrawn a paper from the Journal of Biological Chemistry (JBC), but readers won’t know why.

The paper, “Static High-Gradient Magnetic Fields Activate Transient Receptor Potential Vanilloid 4 (TRPV4) Ion Channels Enabling Remote Control of Cell Function,” whose corresponding author is Thomas Simmet of Ulm University, appeared online on June 11. Since June 24, the PDF of the paper has been stamped: Read the rest of this entry »

Retraction of 19-year-old Nature paper reveals hidden cameras, lab break-in, evidence tampering

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nature bezouskaWe’ve often found that when some authors refuse to sign retraction notices, there’s a much bigger story than terse notices let on. And a retraction in this week’s Nature of a 19-year-old paper is a shining example of that.

Here’s the brief notice for “Oligosaccharide ligands for NKR-P1 protein activate NK cells and cytotoxicity,” a 1994 paper by researchers from the UK and the Czech Republic that had already been subject to a 1996 correction: Read the rest of this entry »

Hip, hip, retract! Cobalt poisoning case study pulled as duplicate

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hipinternationalHip International has retracted a case study for duplication. (We apologize for the partial duplication of a headline for an earlier post about this journal, which told readers that “Similar cases will be referred to retractionwatch.”)

The article was titled “Chronic intoxication with cobalt following revision total hip arthroplasty,” and it appeared online ahead of print. Cobalt toxicity associated with metal-on-metal replacement hips has been raised as a potential adverse effect from the devices.

As the notice explains:

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Written by amarcus41

February 27, 2013 at 9:30 am


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