Chondrogenic commitment of human umbilical cord blood and umbilical cord-derived mesenchymal stem cells induced by the supernatant of chondrocytes: A comparison study
Xingfu Li , Zhenhan Deng , Wei Lu
Animal Models and Experimental Medicine ›› 2024, Vol. 7 ›› Issue (6) : 793 -801.
Chondrogenic commitment of human umbilical cord blood and umbilical cord-derived mesenchymal stem cells induced by the supernatant of chondrocytes: A comparison study
Background: Native cartilage has low capacity for regeneration because it has very few progenitor cells. Human umbilical cord blood-derived mesenchymal stem cells (hUCB-MSCs) and human umbilical cord-derived MSCs (hUC-MSCs) have been employed as promising sources of stem cells for cartilage injury repair. Reproduction of hyaline cartilage from MSCs remains a challenging endeavor. The paracrine factors secreted by chondrocytes possess the capability to induce chondrogenesis from MSCs.
Methods: The conditioned medium derived from chondrocytes was utilized to induce chondrogenic differentiation of hUCB-MSCs and hUC-MSCs. The expression levels of collagen type I alpha 1 chain (Col1a1), collagen type II alpha 1 chain (Col2a1), and SRY-box transcription factor 9 (SOX9) were assessed through quantitative real-time polymerase chain reaction (qRT-PCR), Western blot (WB), and immunofluorescence (IF) assays. To elucidate the mechanism of differentiation, the concentration of transforming growth factor-β1 (TGF-β1) in the conditioned medium of chondrocytes was quantified using enzyme-linked immunosorbent assay (ELISA). Meanwhile, the viability of cells was assessed using Cell Counting Kit-8 (CCK-8) assays.
Results: The expression levels of Col2a1 and SOX9 were found to be higher in induced hUC-MSCs compared to those in induced hUCB-MSCs. The conditioned medium of chondrocytes contained TGF-β1. The CCK-8 assays revealed that the proliferation rate of hUC-MSCs was significantly higher compared to that of hUCB-MSCs.
Conclusions: The chondrogenic potential and proliferation capacity of hUC-MSCs surpass those of hUCB-MSCs, thereby establishing hUC-MSCs as a superior source of seed cells for cartilage tissue engineering.
cartilage diseases / chondrogenic differentiation / mesenchymal stem cells
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2024 The Author(s). Animal Models and Experimental Medicine published by John Wiley & Sons Australia, Ltd on behalf of The Chinese Association for Laboratory Animal Sciences.
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