摘要
The cell-derived extracellular matrix(ECM)-modified scaffolds have advantages of mimic tissue specificity and been thought to better mimic the native cellular microenvironment in vitro.ECM derived from cardiac fibroblasts(CFs)are considered as key elements that provide a natural cell growth microenvironment and change the fate of cardiomyocytes(CMs).Here,a new hybrid scaffold is designed based on silk fibroin(SF)scaffold and CFs-derived ECM.CFs were seeded on the SF scaffold for 10days culturing and decellularized to produce CFs-derived ECM-coated SF scaffold.The results showed that the cell-derived ECM-modified silk fibroin scaffold material contained collagen,laminin,fibronectin and other ECM components with myocardial-like properties.Further to explore its effects on brown adipose stem cells(BASCs)differentiation into CMs.We found that the CFderived ECM-coated scaffold also increased the expression of CM-specific proteins(e.g.cardiac troponin T and α-actinin)of BASCs.Notably,the b1-integrin-dependent transforming growth factor-β1 signaling pathway was also involved in the regulation of CF-derived ECM by promoting the differentiation of BASCs into CMs.Overall,these findings provide insights into the bionic manufacturing of engineered cardiac tissues(ECTs)and establish a theoretical basis for the construction of ECTs.
基金
supported by the Key Program of the National Key Research and Development Program of China(nos.2017YFA0106100,2016YFY1101303)
the National Natural Science Funds for Outstanding Young Scholar(no.81622027)
the Key Program of National Natural Science Foundation of China(no.31830030)
the Beijing NOVA Program of China(no.2016B615)
Joint funds for National Natural Science Foundation of China(no.U1601221).
