A stem cell research group at the University of Louisville, Kentucky — famous for apparently discovering an exciting new class of stem cells — could be facing new troubles.
Although the work of Mariusz Ratajczak was supported through large NIH and Vatican grants, no other lab could replicate his findings on very small embryonic-like stem cells (VSELs).
And now, 28 papers from the Ratajczak lab are listed on PubPeer for image duplication and textual similarity concerns.

March 2022 update: No misconduct found
The University of Louisville sent their final decision – dated July 29, 2021 – to me today – March 23, 2022 (shared here with permission).
“The University of Louisville found there was no research misconduct. The institution followed its established, thorough, and robust process and made no findings of research misconduct against Dr. Ratajczak associated with any of the allegations, including all the allegations that continue to persist publicly on the internet. ”
Continue reading “Troubles with VSELs”