Retraction Watch

Tracking retractions as a window into the scientific process

Archive for the ‘gastroenterology’ Category

Two more retractions for former US prof who altered dozens of images

without comments

Two journals have retracted papers by a biologist who was recently found guilty of misconduct by his former employer, the University of Colorado Denver, bringing the total to five.

The investigation report by UC Denver, which we obtained earlier this year via a public records request, had recommended one of the two newest retractions, which appears in the journal Hepatology. The other retraction, in the Journal of Immunology, was not flagged by the report — which found, among other conclusions, that Almut Grenz had altered multiple values in research that had already been submitted for peer review.

Here’s the notice for the Journal of Immunology paper:

Read the rest of this entry »

Authors say patient threatened legal action after being subject of scholarly paper

with 4 comments

A patient appears to have had a change of heart about being featured in a case report.

The patient cannot be identified in the paper published in Journal of Gastrointestinal and Liver Diseases. However, according to the retraction notice, she threatened to sue if the authors did not withdraw it. After receiving the threat, the paper’s corresponding author, Mariano Sica, told us that the authors immediately asked the journal to retract the paper.

We’ve written about similar cases where patients do not provide informed consent or withdraw it, but in this case we haven’t seen the threat ourselves.

We asked Sica if we could see the legal threat, and he said he couldn’t share it, explaining: Read the rest of this entry »

Yikes: Peer reviewer stole (and published) author’s data

with 2 comments

A gastroenterology and hepatology journal has retracted a 2017 review after discovering it included data “accessible only during peer review for another journal.”

Although we don’t know the details of this particular case—for instance, how the editors and publisher of Alimentary Pharmacology & Therapeutics learned about the transgression and which author was responsible—the journal acted quickly to retract the paper, which was published online in March.

Here’s the retraction notice for “Systematic review: benefits and harms of transarterial embolisation for treating hepatocellular adenoma:”

Read the rest of this entry »

A first for us: Journal retracts obituary (but not for the reasons you think)

with one comment

journalofdigestivediseasesOn December 31st 2014, a pioneer in the study of inflammatory bowel disease passed away. An obituary published in the Journal of Digestive Diseases shortly thereafter is typical enough: It describes his achievements, importance to his patients, and battle with pancreatic cancer.

But “Loss in the Last Day of 2014: a Eulogy for Prof. Bing Xia” has now been retracted.

This is the first time we’ve seen an obituary pulled from a journal. Unfortunately, this was not a case of a premature obituary (which happens more often than you’d think)– the researcher did actually die, but it appears the journal published the obituary in the wrong place.

The retraction notice, published earlier this year, explains:

Read the rest of this entry »

Written by Shannon Palus

December 5th, 2016 at 9:30 am

Researcher accused of fraud, embezzlement acquitted by Italian court

with one comment

University of PerugiaAn Italian court has acquitted a gastroenterologist who was accused of fraud and embezzlement.  

An earlier institutional investigation into Stefano Fiorucci, based at the University of Perugia in Italy, found that he had manipulated images in publications that he allegedly used to win two million Euros of funding. The story, which has dragged on for years, has resulted in four retractions and nine expressions of concern for publications authored by Fiorucci. 

Fiorucci’s lawyer, Stefano Bagianti, told us: Read the rest of this entry »

Written by Dalmeet Singh Chawla

June 6th, 2016 at 7:00 am

Researcher who sued to stop retractions gets his sixth

with 3 comments

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:” Read the rest of this entry »

Nature fixes highly cited paper suggesting food additives hurt the gut

with one comment

Nature_latest coverA 2015 study about dietary emulsifiers has been corrected by Nature after another researcher pointed out a few ambiguities.

When it first appeared, the study — which showed emulsifiers cause inflammation in the guts of mice — received a fair amount of media attention, including from Nature’s own news department. But since publication, a researcher noted some imprecision around the ages of mice used in the sample, affecting the paper’s calculations of weight gain over time. Andrew Gewirtz, co-author of the study from Georgia State University, told us the change did not affect the conclusions of the paper.

Here’s the corrigendum for “Dietary emulsifiers impact the mouse gut microbiota promoting colitis and metabolic syndrome”: Read the rest of this entry »

Data manipulation flushes paper on gut bacteria

with 2 comments

cell reportsData manipulation in a Cell Reports paper blew the importance of a kind of bacteria out of proportion.

Retracted this month — less than three months after it was published — the paper showed, according to a summary on the cover page:

B. subtilis is a symbiont that resides in the gut of C. elegans and generates nitric oxide that is essential for the host. Xiao et al. demonstrate that nitric oxide promotes defense against pathogenic bacteria by activating p38 MAPK, demonstrating the importance of commensal bacteria in host immunity.

But B. subtilis — a member of the Bacillaceae family — aren’t actually as plentiful as they appeared, explains the retraction notice for “Gut-Colonizing Bacteria Promote C. elegans Innate Immunity by Producing Nitric Oxide:”

Read the rest of this entry »

Poop paper flushed due to possible sample contamination

without comments

cover (3)The authors of a paper on a new probiotic strain of bacteria found in pig feces have retracted it from Animal Science Journal after discovering some of the bacteria might have been contaminated.

Readers likely know by now how easy it is for this to happen, as we frequently report on retractions due to similar reasons. Like other instances of mistaken cell identity, the authors of this 2013 paper realized the mistake following further tests of the bacteria used in the experiment.

The retraction for “Isolation, characterization, and effect of administration in vivo, a novel probiotic strain from pig feces

Read the rest of this entry »

Son sees dead father in case report, requests retraction

with one comment

ijscrAuthors have retracted a case report describing a surgery to remove gallstones in a patient with Crohn’s disease after learning they’d mixed up two cases, and instead reported on a patient who had died 21 days after the procedure.

We were alerted to this story by La Repubblica, and contacted by the son of the patient (who asked not to be named, for privacy reasons). He told us he found the study and asked the journal to retract it:

…I can say that it was absolutely devastating to realise that the pictures I was looking at were from the surgery that led to the death of my father. It is something that gives me a lot of sorrow thinking that the man in that picture with the open belly was him, when he was fighting for his life. I asked the rest of my family not to see them to avoid them the same shock.

Even before the retraction appeared, we received confirmation it was coming from Giuseppe Paolisso, the Principal of the School of Medicine at the Second University of Naples, where the authors are based: Read the rest of this entry »