Enhanced lubricin secretion by human synovial mesenchymal stem cells compared to adipose mesenchymal stem cells.

Early human evidence such as case series or small samples is exploring possible benefits.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Mesenchymal stem cell (MSC) therapy has emerged as a promising treatment option for knee osteoarthritis. Adipose MSCs are commonly used due to their easy accessibility; however, synovial MSCs have demonstrated a superior capacity for cartilage matrix synthesis. The mechanism underlying this difference in therapeutic efficacy may involve lubricin, a crucial glycoprotein that maintains joint lubrication and protects cartilage. Notably, lubricin levels decrease during the progression of osteoarthritis. The aim of this study was to compare extracellular lubricin secretion by human synovial MSCs versus adipose MSCs. We also analyzed potential correlations between synovial MSC lubricin secretion and synovial inflammation. Tissues for MSC isolation were obtained from 16 human donors with osteoarthritis who underwent total knee arthroplasty. Synovium was collected from the suprapatellar pouch on the femoral side, whereas adipose tissue was harvested from the subcutaneous layer of the knee skin incision. The synovial and adipose MSCs from each donor were cultured for 48 h (six replicate wells per donor), and lubricin concentrations in culture supernatants were measured using ELISA. For 11 donors, lubricin concentrations were measured directly, whereas the concentrations were normalized to cell number for the other 5 donors. MSC identity was assessed by flow cytometry and trilineage diff

Evidence level

Early human evidence such as case series or small samples is exploring possible benefits.

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