Background： Fibroblasts were the main seed cells in the studies of tissue engineering of the pelvic floor ligament. Basic fibroblast growth factor （bFGF） and epidermal growth factor （EGF） were widely studied but ...Background： Fibroblasts were the main seed cells in the studies of tissue engineering of the pelvic floor ligament. Basic fibroblast growth factor （bFGF） and epidermal growth factor （EGF） were widely studied but at various concentrations. This study aimed to optimize the concentrations of combined bFGF and EGF by evaluating their effects on proliferation and collagen secretion of fibroblasts. Methods： Fibroblasts were differentiated from rat adipose mesenchymal stem cells （ADSCs）. Flow cytometry and immunohistochemistry were used for cell identification. The growth factors were applied at concentrations of 0, 1, 10, and 100 ng/ml as three groups： （1） bFGF alone, （2） EGF alone, and （3） bFGF mixed with EGF. Cell proliferation was evaluated by Cell Counting Kit-8 assays. Expression of Type I and III collagen （Col-I and Col-1II） mRNAs was evaluated by real-time quantitative reverse transcription-polymerase chain reaction. Statistical analysis was performed with SPSS software and GraphPad Prism using one-way analysis of variance and multiple t-test. Results： ADSCs were successfully isolated from rat adipose tissue as identified by expression of typical surface markers CD29, CD44, CD90, and CD45 in flow cytometry. Fibroblasts induced from ADSC, compared with ADSCs, were with higher mRNA expression levels of Col I and Col III （F = 1.29, P = 0.0390）. bFGF, EGF, and the mixture ofbFGF with EGF can enhanced fibroblasts proliferation, and the concentration of 10 ng/ml of the mixture ofbFGF with EGF displayed most effectively （all P 〈 0.05）. The expression levels of Col-I and Col-Ill mRNAs in fibroblasts displayed significant increases in the 10 ng/ml bFGF combined with EGF group （all P 〈 0.05）. Conclusions： The optimal concentration of both bFGF and EGF to promote cell proliferation and collagen expression in fibroblasts was 10 ng/ml at which fibroblasts grew faster and secreted more Type I and III collagens into the extracellular matrix, which might contribute to the st展开更多
基金This study was supported by grants from the National Natural Science Foundation of China （No. 8157142） and Beijing Municipal Science and Technology Commission （No. D151100001915003）.
文摘Background： Fibroblasts were the main seed cells in the studies of tissue engineering of the pelvic floor ligament. Basic fibroblast growth factor （bFGF） and epidermal growth factor （EGF） were widely studied but at various concentrations. This study aimed to optimize the concentrations of combined bFGF and EGF by evaluating their effects on proliferation and collagen secretion of fibroblasts. Methods： Fibroblasts were differentiated from rat adipose mesenchymal stem cells （ADSCs）. Flow cytometry and immunohistochemistry were used for cell identification. The growth factors were applied at concentrations of 0, 1, 10, and 100 ng/ml as three groups： （1） bFGF alone, （2） EGF alone, and （3） bFGF mixed with EGF. Cell proliferation was evaluated by Cell Counting Kit-8 assays. Expression of Type I and III collagen （Col-I and Col-1II） mRNAs was evaluated by real-time quantitative reverse transcription-polymerase chain reaction. Statistical analysis was performed with SPSS software and GraphPad Prism using one-way analysis of variance and multiple t-test. Results： ADSCs were successfully isolated from rat adipose tissue as identified by expression of typical surface markers CD29, CD44, CD90, and CD45 in flow cytometry. Fibroblasts induced from ADSC, compared with ADSCs, were with higher mRNA expression levels of Col I and Col III （F = 1.29, P = 0.0390）. bFGF, EGF, and the mixture ofbFGF with EGF can enhanced fibroblasts proliferation, and the concentration of 10 ng/ml of the mixture ofbFGF with EGF displayed most effectively （all P 〈 0.05）. The expression levels of Col-I and Col-Ill mRNAs in fibroblasts displayed significant increases in the 10 ng/ml bFGF combined with EGF group （all P 〈 0.05）. Conclusions： The optimal concentration of both bFGF and EGF to promote cell proliferation and collagen expression in fibroblasts was 10 ng/ml at which fibroblasts grew faster and secreted more Type I and III collagens into the extracellular matrix, which might contribute to the st
