Haruko Obokata bows as she apologises at a news conference in Osaka, following claims that her ground-breaking stem cell study was fabricated. Photo: AFP
Tokyo: A young female scientist accused of fabricating data made a tearful apology live on Japanese television for "mistakes" in her research, but insisted her ground-breaking conclusions on stem cells were accurate.
Haruko Obokata, 30, blamed her youth and inexperience for errors in her methodology, but said she had managed to create the building-block cells capable of growing into the specialised cells of the brain, liver, heart or kidneys.
"I apologise with my whole heart to my co-authors . . . and many others for causing trouble because of my insufficient efforts, ill-preparedness and unskilfulness," a visibly shaken Dr Obokata told a news conference on Wednesday. "To many people there may be too many unbelievable mistakes, but that does not affect the conclusion."
Dr Obokata was feted as a modern-day Marie Curie after unveiling research that showed a simple way to re-program adult cells to become a kind of stem cell.
Stimulus-triggered acquisition of pluripotency (STAP) cells were hailed as a breakthrough that could provide a ready supply of the base material for much-needed transplant tissue at minimal cost. Campaigners said it represented a leap forward in the fight against degenerative diseases.
Her profile – a young female scientist in a world dominated by middle-aged men – was seized on by Japan's media, which was charmed by eccentricities that included her insistence on wearing a housewife's apron in the laboratory, instead of a white coat.
But within weeks of her paper being published in the prestigious journal Nature, questions began to emerge, with fellow scientists saying they were unable to replicate her results.
The respected Riken Institute, which sponsored the study, launched an inquiry and declared last week that the study was flawed.
This "amounts to phoney research or fabrication" by Dr Obokata, Shunsuke Ishii, head of Riken's investigation committee, told a news conference.
The institute said this week that it was launching a year-long study to establish if there is any truth in Dr Obokata's findings.
On Wednesday, the young scientist choked back sobs during a 2�-hour news conference carried on at least two telelvision channels, in which she insisted: "STAP cells do exist. I successfully made STAP cells at least 200 times."
She said she did not believe her study should be retracted and said she hoped to announce new research showing "a certain recipe" to create the cells.
"If there is any future for an inexperienced person like me as a researcher, I want to keep working towards the development of STAP cells to a level that could be helpful to someone," she said.