Synergistic effects of growth factor-based serum-free medium and tendon-like substrate topography on tenogenesis of mesenchymal stem cells. 2023

Ke Li, and Xu Zhang, and Dan Wang, and Rocky S Tuan, and Dai Fei Elmer Ker
Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong; School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong; Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, Hong Kong.

Addressing clinical challenges for tendon injuries requires a deeper understanding of the effects that biological and biophysical cues have on tenogenesis. Although prior studies have identified tenogenic growth factors (GFs) or elucidated the effects of substrate topography on tenocyte behavior, few have characterized their combined effect in the presence of a tendon-like substrate. In this study, we assessed the effect of biological (GFs) and biophysical (substrate topography) cues on tenogenic proliferation and differentiation under defined, serum-free conditions. Specifically, human bone marrow-derived mesenchymal stem cells (hMSCs) were cultured in a serum-free culture medium containing a GF cocktail comprised of fibroblast growth factor-2 (FGF-2), transforming growth factor-beta 3 (TGF-β3), and insulin-like growth factor-1 (IGF-1), either alone or in combination with tendon-like substrate topography produced by replica casting of tendon tissue sections. Our data demonstrated that the use of serum-free GF cocktail medium alone promoted hMSC proliferation, as shown via DNA staining as well as Ki67 protein levels and gene expression. In particular, gene expression of Ki67 was increased by 8.46-fold in all three donors relative to serum-free medium control. Also, serum-free GF cocktail promoted tenogenic differentiation, on the basis of expression of tendon-associated gene and protein markers, scleraxis (SCX), tenascin C (TNC), and collagen type I (COL1A1) including increased normalized collagen production by 1.4-fold in two donors relative to serum-free medium control. Interestingly, hMSCs cultured on a tendon-like substrate exhibited highly oriented cell morphology and extracellular matrix (ECM) alignment reminiscent of tendon. In particular, when this GF cocktail was combined with tendon-like topography, they showed a synergistically increased expression of tendon-related markers and anisotropic organization of ECM proteins with moderate-to-large effect sizes. Together, in addition to showing the utility of a GF cocktail for expansion and differentiation of tenocyte-like cells, our findings clearly demonstrate the synergistic relationship between GF-mediated and substrate topography-related effects on hMSC tenogenic differentiation. This information provides insights into the design of strategies that combine biological and biophysical cues for ex vivo tenocyte production and tendon tissue engineering.

UI MeSH Term Description Entries
D002454 Cell Differentiation Progressive restriction of the developmental potential and increasing specialization of function that leads to the formation of specialized cells, tissues, and organs. Differentiation, Cell,Cell Differentiations,Differentiations, Cell
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013710 Tendons Fibrous bands or cords of CONNECTIVE TISSUE at the ends of SKELETAL MUSCLE FIBERS that serve to attach the MUSCLES to bones and other structures. Endotenon,Epotenon,Tendons, Para-Articular,Tendons, Paraarticular,Endotenons,Epotenons,Para-Articular Tendon,Para-Articular Tendons,Paraarticular Tendon,Paraarticular Tendons,Tendon,Tendon, Para-Articular,Tendon, Paraarticular,Tendons, Para Articular
D059630 Mesenchymal Stem Cells Mesenchymal stem cells, also referred to as multipotent stromal cells or mesenchymal stromal cells are multipotent, non-hematopoietic adult stem cells that are present in multiple tissues, including BONE MARROW; ADIPOSE TISSUE; and WHARTON JELLY. Mesenchymal stem cells can differentiate into mesodermal lineages, such as adipocytic, osteocytic and chondrocytic. Adipose Tissue-Derived Mesenchymal Stem Cell,Adipose Tissue-Derived Mesenchymal Stromal Cell,Adipose-Derived Mesenchymal Stem Cell,Bone Marrow Mesenchymal Stem Cell,Mesenchymal Stromal Cell,Mesenchymal Stromal Cells,Multipotent Bone Marrow Stromal Cell,Multipotent Mesenchymal Stromal Cell,Adipose Tissue-Derived Mesenchymal Stem Cells,Adipose Tissue-Derived Mesenchymal Stromal Cells,Adipose-Derived Mesenchymal Stem Cells,Adipose-Derived Mesenchymal Stromal Cells,Bone Marrow Mesenchymal Stem Cells,Bone Marrow Stromal Cell,Bone Marrow Stromal Cells,Bone Marrow Stromal Cells, Multipotent,Bone Marrow Stromal Stem Cells,Mesenchymal Progenitor Cell,Mesenchymal Progenitor Cells,Mesenchymal Stem Cell,Mesenchymal Stem Cells, Adipose-Derived,Mesenchymal Stromal Cells, Multipotent,Multipotent Bone Marrow Stromal Cells,Multipotent Mesenchymal Stromal Cells,Stem Cells, Mesenchymal,Wharton Jelly Cells,Wharton's Jelly Cells,Adipose Derived Mesenchymal Stem Cell,Adipose Derived Mesenchymal Stem Cells,Adipose Derived Mesenchymal Stromal Cells,Adipose Tissue Derived Mesenchymal Stem Cell,Adipose Tissue Derived Mesenchymal Stem Cells,Adipose Tissue Derived Mesenchymal Stromal Cell,Adipose Tissue Derived Mesenchymal Stromal Cells,Mesenchymal Stem Cells, Adipose Derived,Progenitor Cell, Mesenchymal,Progenitor Cells, Mesenchymal,Stem Cell, Mesenchymal,Stromal Cell, Mesenchymal,Stromal Cells, Mesenchymal,Wharton's Jelly Cell,Whartons Jelly Cells
D019394 Ki-67 Antigen A CELL CYCLE and tumor growth marker which can be readily detected using IMMUNOCYTOCHEMISTRY methods. Ki-67 is a nuclear antigen present only in the nuclei of cycling cells. Antigen Ki-67,MIB-1 Antigen,Antigen Ki67,Antigen Ki 67,Antigen, Ki-67,Antigen, MIB-1,Ki 67 Antigen,Ki-67, Antigen,Ki67, Antigen,MIB 1 Antigen
D036341 Intercellular Signaling Peptides and Proteins Regulatory proteins and peptides that are signaling molecules involved in the process of PARACRINE COMMUNICATION. They are generally considered factors that are expressed by one cell and are responded to by receptors on another nearby cell. They are distinguished from HORMONES in that their actions are local rather than distal. Growth Factor,Growth Factors,Paracrine Peptide Factors,Paracrine Protein Factors,Factor, Growth,Factors, Growth,Peptide Factors, Paracrine

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