ArticleJournal of orthopaedic research : official publication of the Orthopaedic Research Society2022
Fibroadipogenic progenitor cell response peaks prior to progressive fatty infiltration after rotator cuff tendon tear.
Article in Journal of orthopaedic research : official publication of the Orthopaedic Research Society, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 2 citations in OpenAlex.
- Clinical application of musculoskeletal for supraspinatus tendon tears with fat infiltration.Quantitative imaging in medicine and surgery · 2026Article
- Mitochondrial transfer and transplantation in tendon, ligament, and enthesis repair: current evidence, mechanistic rationale, and regenerative opportunities.Frontiers in cell and developmental biology · 2026Review
- Clinical application of ultrasound-guided platelet-rich plasma gel in the treatment of supraspinatus tendon tears: a single-center retrospective study.Scientific reports · 2025Article
- Shoulder Dysfunction and Mobility Limitation in Aging.Advances in geriatric medicine and research · 2023Article
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Authors and funding
10 authors at 1 institution in 1 country.
Funding
Abstract
Fibroadipogenic progenitor (FAP) cells are implicated as a major source of fatty infiltration (FI) in murine rotator cuff (RC) injury, but FAP cell response after RC tear in a rabbit model is unknown. This study determined whether changes in FAP cell count after an RC tear predate muscle degeneration in a clinically relevant rabbit model. We hypothesized increases in FAP cell count correlate temporally with RC degeneration. New Zealand white rabbits (n = 26) were evaluated at 1, 2, 4, and 6 weeks after unilateral full-thickness tenotomy of supraspinatus and infraspinatus tendons. FI area and adipocyte size were histologically analyzed, muscle density was measured by computerized tomography, and quantification of FAP cells was measured by flow cytometry and immunohistochemistry. The percentage of intrafascicular adipocyte area increased over time in supraspinatus muscle samples (p = 0.03), significantly between 1- and 6-week samples (p = 0.04). There were no differences in perifascicular adipocyte area percentages between time points. Peak increase in FAP cell count occurred at 1-week (p = 0.03), with a decrease in the following weeks. There was a negative correlation between supraspinatus adipocyte area and FAP cell count (p < 0.05). On computed tomography (CT) scan, maximal decrease in muscle density was observed in the 4th to 6th weeks. In summary, FAP cell response occurred early after tenotomy and did not correlate temporally with increases in FI. This suggests that FAP cell response may predate degenerative changes, and early targeting of FAPs before adipocyte maturation could blunt FI after RC tear.
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