Retraction Watch

Tracking retractions as a window into the scientific process

Archive for the ‘alirio melendez’ Category

Melendez notches retraction 14, Lemus now stands at 12

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int j biochem mol bioTwo researchers who have appeared frequently on Retraction Watch have racked up another retraction each.

This is the fourteenth retraction for Alirio Melendez, who was found guilty of misconduct by the National University of Singapore but denies the allegations. Here’s the notice in The International Journal of Biochemistry & Cell Biology for “Environmental toxicogenomics: A post-genomic approach to analysing biological responses to environmental toxins,” a paper published in Environmental Research and cited nine times, according to Thomson Scientific’s Web of Knowledge: Read the rest of this entry »

Alirio Melendez categorically denies data falsification, alleges cover-up

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alirio_melendezAlirio Melendez, who was found guilty of scientific misconduct by the National University of Singapore and has had 13 papers retracted, says none of what he’s being accused of is true.

In a statement posted yesterday at ajmelendez.co.uk and this morning at Retraction Watch, Melendez acknowledges that fraud occurred in his laboratory, but “categorically” denies having taken part in it. Here’s the full statement: Read the rest of this entry »

Written by Ivan Oransky

October 17th, 2013 at 1:00 pm

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Melendez Science paper retracted, making 13

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alirio_melendezAlirio Melendez, who has already had 12 papers retracted from various journals and been found guilty of scientific misconduct by a former employer, has had a Science paper retracted.

Here’s the notice (which is behind a paywall): Read the rest of this entry »

Retraction 12 appears for Alirio Melendez, this one for plagiarism

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alirio_melendezThe twelfth of Alirio Melendez’s 20-something retractions has appeared, in Clinical and Experimental Pharmacology and Physiology.

Along with the retraction notice, the journal runs letters from the paper’s two co-authors. Melendez writes: Read the rest of this entry »

Alirio Melendez notches retractions 10 and 11

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jbcmarch13coverFormer National University of Singapore and University of Liverpool scientist Alirio Melendez has two more of the 20-something retractions suggested by the investigations into his work. Both appear in the Journal of Biological Chemistry.

Here’s the notice for “FcγRI-triggered generation of arachidonic acid and eicosanoids requires iPLA2 but not cPLA2 in human monocytic cells:” Read the rest of this entry »

Written by Ivan Oransky

April 9th, 2013 at 8:30 am

Retraction nine appears for Alirio Melendez

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alirio_melendezAn immunologist found by a former employer to have committed misconduct in more than 20 papers has had another paper retracted.

Here’s the notice for “Refining siRNA in vivo transfection: Silencing SPHK1 reveals its key role in C5a-induced inflammation in vivo,” by Alirio Melendez and colleagues in The International Journal of Biochemistry & Cell Biology: Read the rest of this entry »

Written by Ivan Oransky

March 18th, 2013 at 4:00 pm

And then there were eight: Three more retractions for Alirio Melendez, all in the Journal of Immunology

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alirio_melendezAlirio Melendez, who has already retracted five papers and was found by one of his former universities to have committed misconduct on more than 20, has three more retractions.

Here’s the notice for “Antisense Knockdown of Sphingosine Kinase 1 in Human Macrophages Inhibits C5a Receptor-Dependent Signal Transduction, Ca2+ Signals, Enzyme Release, Cytokine Production, and Chemotaxis,” cited 68 times, according to Thomson Scientific’s Web of Knowledge: Read the rest of this entry »

NUS: Melendez committed “serious scientific misconduct,” but don’t expect to get any details

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alirio_melendezAlirio Melendez, a former National University of Singapore immunologist whose story we’ve been following here since a retraction in September of last year, committed misconduct on an “unprecedented” scale, according to the university, involving more than 20 papers.

Nature’s Richard van Noorden has the scoop:

After a 19-month investigation, the National University of Singapore (NUS) today says that it has determined that one of its former scientists, the immunologist Alirio Melendez, has committed “serious scientific misconduct”.  The university found fabrication, falsification or plagiarism associated with 21 papers, and no evidence indicating that other co-authors were involved in the misconduct, it says.

Melendez has retracted five papers so far, as we’ve reported, but NUS wouldn’t give the whole list. They tell Nature: Read the rest of this entry »

Written by Ivan Oransky

December 20th, 2012 at 12:17 pm

Fifth Alirio Melendez retraction offers clues about University of Glasgow misconduct findings

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A new retraction — his fifth — in the Journal of Immunology for Alirio Melendez, formerly of the National University of Singapore, the University of Glasgow, and the University of Liverpool, sheds some light on the results of an investigation by one of the universities.

Last month, a Glasgow spokesperson told Nature that the university’s investigation had been completed in October 2011, but that it did not comment on individual cases. A spokesperson, according to the Times Higher Education:

…would say only that there was “no evidence that our current staff contributed, falsified or duplicated data to any publications co-authored with (Professor) Melendez”. He also confirmed that relevant journals would be contacted where retractions or corrections were deemed necessary.

The notice for one such necessary retraction, in the September 15 issue of the Journal of Immunology, gives a few details: Read the rest of this entry »

Retraction number four appears in PNAS for work of Alirio Melendez, who has resigned post at U Liverpool

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Alirio Melendez, who has had three of his papers retracted amidst suspicions about 70, has had another one retracted, this one in the Proceedings of the National Academy of Sciences (PNAS). And he has also resigned from his post at the University of Liverpool, we have just learned.

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