Total RNA was extracted from cultured CFs using
Trizol (Ambion, USA). RNA concentration was determined by microspectrophotometer. Reverse transcription of mRNA into cDNA was performed according to the manufacturer's protocol (Tiangen, China). mRNA expression levels were quantified using a qPCR system (
Fast 7500, ABI). qPCR reactions were performed with
SYBR Green kit (Tiangen, China), using 1
μL of cDNA as a template in each 25
μL reaction mixture. The PCR protocol was as follows: an initial 15 min denaturation at 95°C followed by 40 cycles involving 10 s denaturation at 95°C, 30 s annealing at 60°C, and 30 s extension at 72°C. Transcription levels of migration-related factors, including vascular endothelial growth factor (VEGF), tumor necrosis factor-
α (TNF-
α), matrix metalloproteinase-9 (MMP-9), matrix metalloproteinase-2 (MMP-2), stem cell factor (SCF), tissue inhibitor of metalloproteinase-1 (TIMP1), epidermal growth factor (EGF), stromal cell-derived factor 1 (SDF-1), basic fibroblast growth factor (bFGF), granulocyte colony-stimulating factor (G-CSF), hepatocyte growth factor (HGF), hypoxia inducible factor-1
α (HIF-1
α), and monocyte chemoattractant protein-1 (MCP-1) were tested. Their primer sequences are listed in
Table 1. The quantitative reactions were conducted according to the manufacture's instruction (Agilent, USA).
Gao Q., Guo M., Zeng W., Wang Y., Yang L., Pang X., Li H., Suo Y., Jiang X, & Yu C. (2015). Matrix Metalloproteinase 9 Secreted by Hypoxia Cardiac Fibroblasts Triggers Cardiac Stem Cell Migration In Vitro. Stem Cells International, 2015, 836390.