Funding: chondrocyte-like cells were obtained from iPSCs within the framework of the State Assignment #122032300191-2 “Organoid-22”. Immunocytochemical and PCR-based assessment of chondrogenic markers in the iPSC-derived chondrocytes, as well as assessment of immunogenicity of these chondrocyte-like cells were conducted within the framework of the RSF project #22-15-00250 “Comparison of chondrogenic potential of the cartilage tissue obtained using primary chondrocyte culture and using differentiated derivatives of induced pluripotent stem cells”.

Acknowledgements: the authors express their gratitude to M. Bogomyakova, L. Belikova, Laboratory of Cell Biology, Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of FMBA of Russia, for assistance in planning and conducting the experiment.

Author contribution: Barinova AA — immunological tests, manuscript preparation and writing, search for literature; Pikina AS — collecting chondrocytes from the patient and iPSC differentiation into chondrocyte-like cells, immunohistochemistry; Golubinskaya PA — search for literature; Ruchko ES — conducting PCR; Eremeev AV — manuscript editing.

Compliance with ethical standards: the study was approved by the Ethics Committee of the Lopukhin Federal Research and Clinical Center of PhysicalChemical Medicine of FMBA of Russia (protocol № 2019/02 dated 09 April 2019).