In case you hadn't seen it, the "acid-washed stem cells" business has gone as far into the dumper as it can possibly go. It now appears that the whole thing was a fraud, from start to finish - if that's not the case, I'll be quite surprised, anyway. The most senior author of the (now retracted) second paper, Teruhiko Wakayama, has said that he doesn't believe its results:
The trigger, he told Bioscience, was his discovery—which he reported to Riken a few weeks ago--that two key photos in the second paper were wrong. Obokata, lead author on both papers, had in April been found by Riken guilty of misconduct on the first paper: the falsification of a gel electrophoresis image proving her starting cells were mature cells, and the fabrication of images proving resulting STAP stem cells could form the three major tissue types of the body.
But Riken had not yet announced serious problems with the second paper.
Last week, however, there was a flurry of activity in the Japanese press, as papers reported that two photos—supposed to show placenta made from STAP cells, next to placenta made from embryonic stem (ES) cells—were actually photos of the same mouse placenta.
As with so many cases before this one, we now move on (as one of Doris Lessing's characters once put it) to having interesting thoughts about the psychology of lying. How and why someone does this sort of thing is, I'm relieved to say, apparently beyond me. The only way I can remotely see it is if these results were something that a person thought were really correct, but just needed a bit more work, which would be filled in in time to salvage everything. But how many times have people thought that? And how does it always seem to work out? I'm back to being baffled. The stem cell field has attracted its share of mentally unstable people, and more.