Category: by author

Seventh retraction appears for cancer researcher who sued PubPeer commenters

sarkar
Fazlul Sarkar

Fazlul Sarkar, who sued PubPeer commenters for criticizing his work, has logged two more retractions, bringing his total to seven.

The two retractions appear in the Journal of Cellular Physiology, and follow five others released last week by another Wiley journal, Journal of Cellular Biochemistry. All notices mention an investigation at Wayne State University, where Sarkar is on the faculty.

Here’s the notice for “Activated K-Ras and INK4a/Arf Deficiency Promote Aggressiveness of Pancreatic Cancer by Induction of EMT Consistent With Cancer Stem Cell Phenotype:” Continue reading Seventh retraction appears for cancer researcher who sued PubPeer commenters

Researcher suing PubPeer commenters earns 5 retractions following investigation

sarkar
Fazlul Sarkar

An investigation at Wayne State University has prompted five retractions for a scientist who is suing PubPeer commenters after they criticized his work on the site.

The investigation into Fazlul Sarkar and his co-authors found that the papers contain images that were “inappropriately manipulated” or “inappropriately re-used and re-labeled.” All five retraction notices are from the Journal of Cellular Biochemistry.

Here’s the retraction notice for “Concurrent inhibition of NF-κB, cyclooxygenase-2, and epidermal growth factor receptor leads to greater anti-tumor activity in pancreatic cancer:

Continue reading Researcher suing PubPeer commenters earns 5 retractions following investigation

Nutrition researcher loses two more papers after misconduct findings come to light

R K Chandra, self-proclaimed father of nutritional immunology (from www.drrkchandra.com)
R K Chandra, self-proclaimed father of nutritional immunology (from www.drrkchandra.com)

The self-proclaimed “father of nutritional immunology,” Ranjit Kumar Chandra, has lost two more papers following the release of a misconduct investigation report by his former employer, Memorial University of Newfoundland (MUN).

The report was released last year after Chandra lost his libel suit against the Canadian Broadcasting Company (CBC). The newly retracted papers were both published in Nutrition Research. On one, the author is listed as “Amrit Jain,” who is allegedly Chandra, as well.

Here’s the retraction notice for the article by Amrit Jain: 

Continue reading Nutrition researcher loses two more papers after misconduct findings come to light

What does “reproducibility” mean? New paper seeks to standardize the lexicon

Science Translational MedicineWhat is the difference between “reproducible” and “replicable”? And how does each relate to results that are “generalizable” and “robust”?

Researchers are using these terms interchangeably, creating confusion over what exactly is needed to confirm a scientific result, argues a new paper published today in Science Translational Medicine.

Here’s how the US National Science Foundation (NSF) defines “reproducibility,” according to the authors: Continue reading What does “reproducibility” mean? New paper seeks to standardize the lexicon

Researcher who sued to stop retractions gets his sixth

Mario Saad
Mario Saad

A sixth retraction has appeared for a diabetes researcher who previously sued a publisher to try to stop his papers from being retracted.

Mario Saad‘s latest retraction, in PLOS Biology, stems from inadvertent duplications, according to the authors.  Though an investigation at Saad’s institution — the University of Campinas in Brazil — found no evidence of misconduct, a critic of the paper told The Scientist he does not believe that the issues with blots were inadvertent.

Previously, Saad sued the American Diabetes Association to remove four expressions of concern from his papers; they were later retracted, even though Unicamp recommended keeping three of them published.

Here’s the new retraction notice, for “Gut Microbiota Is a Key Modulator of Insulin Resistance in TLR 2 Knockout Mice:” Continue reading Researcher who sued to stop retractions gets his sixth

Dutch university ordered to pay economist after she was accused of plagiarism

VU UniversityA court in the Netherlands has fined Vrije Universiteit Amsterdam (VU) 7,500 euros to compensate for “immaterial damage” to an economist accused of plagiarism.

Karima Kourtit, a researcher at VU, has been at the receiving end of anonymous complaints to her institution accusing her of plagiarism and her professor, high-profile economist Peter Nijkamp, of duplication (i.e. self-plagiarism). Kourtit is now seeking to prosecute the unnamed source of the complaint for defamation; the VU told us it will no longer accept fully anonymous complaints.

The case began when VU cancelled Kourtit’s thesis defense for plagiarism, and a report published on the VSNU, the Association of Universities, accused Nijkamp of self-plagiarism. Two of Nijkamp’s papers have been retracted as a result of the investigation; Kourtit is an author on one of the retracted papers.

A VU spokesperson told us:

Continue reading Dutch university ordered to pay economist after she was accused of plagiarism

Researcher who unsuccessfully sued journal to stop retractions earns another expression of concern

Mario Saad
Mario Saad

A journal has added expressions of concern (EOCs) to four papers about diabetes, including one co-authored by an author who previously sued a different journal when it took a similar action on his papers.

The Journal of Physiology flagged the papers after an investigation “could not rule out the possibility” that they contained duplicated Western blots. Though the three other papers do not include Mario Saad on their author list, he plays a role: The papers include blots duplicated from other papers of Saad’s. And they reveal that Saad may have published those blots multiple times in his own work.

The EOCs all start out with the same statement: Continue reading Researcher who unsuccessfully sued journal to stop retractions earns another expression of concern

Journal flags duplicated text by gynecologic cancer researcher with 13 retractions

cancers-logo

When journals discover duplicated material, many choose to retract — but a cancer journal recently faced with the same dilemma involving a researcher with multiple retractions under his belt has instead decided to flag the paper with an expression of concern.

An editor told us that Cancers considered retracting the paper, by gynecologic cancer researcher Noriyuki Takai, but decided not to because the paper

contains some novel content that is of interest to the scientific community.

“Epigenetic Therapy in Human Choriocarcinoma,” published in 2010, has been cited once, according to Thomson Reuters Web of Science, and self-plagiarizes from other publications by Takai and his co-author, Hisashi Narahara. Both are researchers at Oita University in Japan.

Here’s the expression of concern:

Continue reading Journal flags duplicated text by gynecologic cancer researcher with 13 retractions

How much does a retracted result pollute the field?

Research Integrity and Peer Review

When a paper is retracted, how many other papers in the same field — which either cite the finding or cite other papers that do — are affected?

That’s the question examined by a study published in BioMed Central’s new journal, Research Integrity and Peer Review. Using the case of a paper retracted from Nature in 2014, the authors found that subsequent research that cites the retracted paper often repeats the problematic finding, thereby spreading it throughout the field. However, papers that indirectly cited the retracted result — by citing the papers that cited the Nature paper, but not the Nature paper itself — typically don’t repeat the retracted result, which limits its spread.

Here’s how the authors describe their findings in the paper: Continue reading How much does a retracted result pollute the field?