ABSTRACT
Obiective To set up a method of scaffold evaluation using human cell line as seed cells and screen appropriate scaffold for live tissue engineering, Methods HepG2 cells were plated onto biodegradable polymer scaffolds: PLGA, 3% chitosan (3%CS) and 2% silk fibroin (2%SF), and cultured in vitro. The growth, distribution and function of HepG2 cells in the scaffolds were evaluated using MTT assay, H.E. staining, and urea assay kit. Results HepG2 cells plated on the three scaffolds maintained a proliferative state. In contrast, the cells on the 2%SF proliferated strongly, while the cells on the PLGA and chitin proliferated poorly. Histological examination showed that HepG2 cells distributed evenly on the 2%SF scaffold with a high amount, while few cells could be found on the PLGA and ehitin at day 7. Cell function assay showed that HepG2 cells on the 2%SF and PLGA exhibited slower decrease of urea synthesis compared to HepG2 cells on the chitosan. Conclusion The three scaffolds have good biocompatibility. In contrast, 2%SF scaffold is more appropriate for liver tissue engineering. This method may be used for scale screening of scaffolds for liver tissue engineering.
ABSTRACT
Objective:To establish the HPLC fingerprint of Prunella Species from different places and evaluate it by cluster analysis.Methods:The analysis method of HPLC ngerprint was established.Alltima C18(4.6mm?250mm,5?m) was utilized for separation.The mobile phase consisted of methanol(A) and 0.5% glacial acetic acid(B) with a ow-rate of 1.0ml/min.The detection wavelength was 280nm and the injection volume was 20?l.The column temperature was 30℃.The HPLC ngerprints of Prunella Species from three di erent places were determined and analyzed by SPSS.Results:There is a big di erence among ngerprints of Prunella from di erent places.Prunella from Hubei,Anhui,Jiangxi,Guizhou,Guangxi,Sichuan were divided into a class;Henan,Jiangsu,Zhejiang were divided into another class.Conclusion:the eatsblished ngerprint showed characteristics of Prunella Species from di erent places obviously,and the attribute of Prunella Species can be distinguished e ectively by cluster analysis method.