Retraction Watch

Tracking retractions as a window into the scientific process

Archive for the ‘shigeaki kato’ Category

Retraction count for Shigeaki Kato climbs to 39

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Shigeaki Kato

Shigeaki Kato

We’ve found another retraction for Shigeaki Kato, number seven on our leaderboard.

Our count for Kato has now risen to 39; we added five retraction notices to our count for Kato last month. These notices follow an investigation at the University of Tokyo, where Kato used to work, which found 43 papers contained “likely altered or forged materials,” according to a 2013 news article from The Asahi Shimbun.

Here’s the retraction note for “1alpha,25(OH)2D3-induced DNA methylation suppresses the human CYP271B1 gene,” published in Molecular and Cellular Endocrinology:

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Shigeaki Kato up to 38 retractions

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Shigeaki Kato

Shigeaki Kato

Our retraction notice count for Shigeaki Kato, number seven on our leaderboard, has grown to 38.

The former University of Tokyo endocrinologist recently earned another retraction, for a paper in Archives of Biochemistry and Biophysics that contained image manipulation. As we’ve noted before, Kato resigned from the university in 2012 as it investigated his work for misconduct; in 2013 a Japanese newspaper reported that the investigation had found 43 papers from his lab contained “likely altered or forged materials.”

In addition to the new retraction, we’ve dug up four others for Kato from the past few years, plus one correction. Two of the retraction notices mention an investigation at the University of Tokyo.

First, the retraction note for “Multiple co-activator complexes support ligand-induced transactivation function of VDR,” published in December:

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Shigeaki Kato up to 33 retractions, with five papers cited a total of 450 times

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Shigeaki Kato

Shigeaki Kato

Former University of Tokyo researcher Shigeaki Kato continues to put big numbers on the board.

Last month, we reported on his 26th, 27th, and 28th retractions, all in Nature Cell Biology and cited close to 700 times. Yesterday, EMBO Journal and EMBO Reports published a total of five more retractions for the endocrinology researcher, who resigned from the university in 2012 following investigations found he had faked images.

Here’s the notice for “A cell cycle-dependent co-repressor mediates photoreceptor cell-specific nuclear receptor function:” Read the rest of this entry »

Shigeaki Kato up to 28 retractions, with three papers cited nearly 700 times

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Shigeaki Kato

Shigeaki Kato

Former University of Tokyo researcher Shigeaki Kato has notched his 26th, 27th, and 28th retractions, all in Nature Cell Biology. The three papers have been cited a total of 677 times.

Here’s the notice for “DEAD-box RNA helicase subunits of the Drosha complex are required for processing of rRNA and a subset of microRNAs:” Read the rest of this entry »

Written by Ivan Oransky

November 3rd, 2014 at 11:30 am

Researcher with 25 retractions covered up other fraud, says university

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Shigeaki Kato

Shigeaki Kato

The Japanese endocrinology researcher Shigeaki Kato, with at least 25 retractions to his name, is alleged to have been the ringleader of a scheme to cover up other research misconduct at the University of Tokyo, his former employer, which investigated the activity.

According to the Japan Times, Kato and three other colleagues took steps to hide evidence of image manipulation in five of 51 theses between 1996 and 2011: Read the rest of this entry »

Written by amarcus41

August 6th, 2014 at 11:00 am

Shigeaki Kato up to 25 retractions

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Shigeaki Kato

Shigeaki Kato

Shigeaki Kato, who resigned from the University of Tokyo in 2012 after being found to have inappropriately manipulated dozens of images, has two more retractions, both in Molecular Cell.

Here’s the notice for 2002’s “Nuclear Receptor Function Requires a TFTC-Type Histone Acetyl Transferase Complex:” Read the rest of this entry »

Shigeaki Kato up to 23 retractions

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katoShigeaki Kato, the former University of Tokyo endocrinology researcher found to have manipulated images in dozens of papers, has six more retractions, bringing his total to 23.

Five of them appear in Molecular and Cellular Biology: Read the rest of this entry »

Shigeaki Kato notches retractions 16 and 17, in PNAS

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katoShigeaki Kato has two more retractions, both in the Proceedings of the National Academy of Sciences (PNAS).

Here’s one of the notices: Read the rest of this entry »

Five more retractions appear for Shigeaki Kato

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katoShigeaki Kato, the former University of Tokyo endocrinology researcher who resigned in 2012 and has retracted at least ten papers, by our count, has five more retractions.

Here are the papers, all in the Journal of Biological Chemistry (JBC): Read the rest of this entry »

Written by Ivan Oransky

January 2nd, 2014 at 9:30 am

Shigeaki Kato notches five more retractions, including one in Nature

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katoShikeagi Kato, an endocrinology researcher who resigned from the University of Tokyo in March 2012 amid an investigation that concluded 43 of his papers should be retracted, has retracted five more papers.

The newest is in this week’s Nature, for “GlcNAcylation of a histone methyltransferase in retinoic-acid-induced granulopoiesis,” a paper first published in 2009. Here’s the notice: Read the rest of this entry »