Japanese stem cell scientist Yoshiki Sasai found dead in apparent suicide
Steve Connor is the Science Editor of The Independent and i. He has won many awards for his journalism, including five-times winner of the prestigious British science writers’ award; the David Perlman Award of the American Geophysical Union; four times highly commended as specialist journalist of the year in the UK Press Awards; UK health journalist of the year and a special merit award of the European School of Oncology for his investigations into the tobacco industry. He has a degree in zoology from the University of Oxford and has a special interest in genetics and medical science, human evolution and origins, climate change and the environment.
Tuesday 05 August 2014
A leading stem cell researcher in Japan has been found dead at his laboratory in an apparent suicide after months of pressure over a controversial study that had to be retracted because of scientific errors.
Yoshiki Sasai, 52, was discovered by a security guard on Tuesday morning at the Riken Centre for Developmental Biology in Kobe where he was deputy director. Suicide notes were found at the scene and on his secretary’s desk, it was reported.
Dr Sasai was the supervisor of Haruko Obokata, the lead author of the stem cell papers published in the journal Nature earlier this year in which it was claimed that blood cells can be converted into embryonic-like cells by simply exposing them to a weak solution of acid.
In a subsequent investigation by Riken, Dr Obakata was accused of scientific misconduct and although Dr Sasai was cleared of any direct involvement, he was harshly criticised for failing to provide oversight during the drafting of the now discredited research papers.
Ryoji Novori, the president of Riken, said in a brief statement: “The world scientific community has lost an irreplaceable scientist.”
In 2011, Dr Sasai stunned the world with a study mimicking the early development of the eye with mouse stem cells that produced a three-dimensional optical cup, similar to a human retina, in the laboratory.
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