Retraction Watch

Tracking retractions as a window into the scientific process

Archive for the ‘czech republic’ Category

Two more retractions bring lab break-in biochemist up to eleven

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bbrcKarel Bezouška, the Czech biochemist who was caught on hidden camera breaking into a lab fridge to fake results, has turned it up to eleven with two new retractions.

Both retractions appeared in Biochemical and Biophysical Research Communications, one in October 2014 and one in January 2015.  His story began two decades ago in 1994, when he published a paper in Nature that couldn’t be reproduced, and was eventually retracted in 2013.

The best part of the story, of course, is that when his university was attempting to recreate his experiments, Bezouška broke into a lab fridge to tamper with the experiments. Unbeknownst to him, he was caught on hidden camera.  Read the rest of this entry »

Retractions follow revelations of misconduct by diabetes biotech

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diabetes careSeveral months after a drug company cancelled development of a potential diabetes cure because it found evidence that a biotech they had recently acquired had committed misconduct in studies of the drug, two retractions of relevant studies have appeared.

The research involves DiaPep277, which, as Josh Levy explained here in September, “would cause the immune system to stop attacking beta cells,” the cells in the pancreas that produce insulin. But Hyperion Therapeutics, which had acquired DiaPep277 developer Andromeda Biotech in June, announced in September that it had

uncovered evidence that certain employees of Andromeda Biotech, Ltd., which Hyperion acquired in June 2014, engaged in serious misconduct, including collusion with a third-party biostatistics firm in Israel to improperly receive un-blinded DIA-AID 1 trial data and to use such data in order to manipulate the analyses to obtain a favorable result.

The retractions are both of papers published in Diabetes Care in May 2014. Here’s the notice for “Treatment of Recent-Onset Type 1 Diabetic Patients With DiaPep277: Results of a Double-Blind, Placebo-Controlled, Randomized Phase 3 Trial:” Read the rest of this entry »

Researcher who broke into lab up to nine retractions

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bichaw_v053i036.inddKarel Bezouška, a researcher who broke into a lab refrigerator to tamper with an investigation into his work, has nine retractions.

Here’s the retraction notice in Biochemistry for 2010’s “Cooperation between Subunits Is Essential for High-Affinity Binding of N-Acetyl-d-hexosamines to Dimeric Soluble and Dimeric Cellular Forms of Human CD69:” Read the rest of this entry »

Written by Ivan Oransky

September 22nd, 2014 at 9:30 am

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 »

Written by Ivan Oransky

June 17th, 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 »

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 13th, 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 1st, 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.”

Read the rest of this entry »