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Wang, Allan W., et al. "Autologous tenocyte implantation, a novel treatment for partial-thickness rotator cuff tear and tendinopathy in an elite athlete." BMJ case reports 2013 (2013): bcr2012007899. voices some phenotype instability concerns regarding the injection of collagen-producing skin-derived tenocyte-like cells, when treating a tendinopathy:

In the patella tendon, [platelet-rich plasma] and other cell based approaches have been used for the treatment of tendinopathies. In a recent level-1 randomised controlled trial, collagen-producing skin-derived tenocyte-like cells have been shown to be superior regarding recovery time, pain and function compared to plasma injections alone.

Despite these promising results, instability of the phenotype is a concern as skin-derived cells are non-homologous to tendon tissue.

Has any medical trial confirmed or infirmed that the injection of collagen-producing skin-derived tenocyte-like cells results in deleterious phenotype instability?

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