Treatments with “stem cells,” therapies that already were sliding into disrepute due to hyped claims and inappropriate use, took another big hit to their scientific credibility when two respected institutions announced they were retracting 31 published studies claiming stem cells could help patients with damaged hearts.
Harvard Medical School and Brigham and Women’s Hospital in Boston jointly denounced Piero Anversa, a once celebrated cardiologist who had worked at both institutions but left in 2015, for putting out false or fabricated data for dozens of studies he and colleagues published. The works — contrary to accepted science — purportedly showed that damaged heart muscle could be regenerated with stem cells, a type of cell that can transform itself into a variety of other cells.
The medical journals that have published Anversa’s studies must decide for themselves their course of action now with his work. The experts at Retraction Watch, a nonprofit that monitors science publishing and pulled papers as part of an effort to provide greater transparency to the scientific process, say it is rare for one researcher to have so many studies determined to be flawed and subject to removal from public view.