I think it's actually this one, or perhaps a new one after it:
https://www.medrxiv.org/content/10.1101/2024.02.19.24301010v...
I find this part most interesting: "Three participants (2, 7, 8) regained motor control. i.e., converted to AIS C or D, at the 1-month examination. Other three (4, 5, 6) converted to grade C after 3 months. In the present study we observed that, in contrast to the expected baseline conversion of 15%, 75% (6/8) of the participants regained voluntary motor control after polylaminin treatment. If we consider only those participants that reached discharge, the proportion increases to 100% (6/6)."
Published: October 8, 2014
More recent work indexed in Google Scholar: https://scholar.google.com/citations?hl=en&user=TVozLNoAAAAJ...
That paper is an in vitro demonstration whereas the OP article seems to imply they tested on actual patients?
Yes, it was tested on patients. @ bfdrummond on Instagram was the first one - he is now almost 100% recovered
Do we know of other patients?
Sometimes drug and medical device companies will gag patients with non-disparagement agreements, while letting the success stories post freely on social media to promote their product/procedure/etc.
More details: https://ensaiosclinicos.gov.br/news/331