Long term maintenance of cytochrome P450 activity in a cell sheet-based three-dimensional human hepatic model

作     者：Guan, Shuwen Gao, Botao Xiao, Jiangwei 

作者机构：Biomedical Materials Research Office Institute of Biological and Medical Engineering Guangdong Academy of Sciences Guangzhou510000 China 

出 版 物：《Shengwu Yixue Gongchengxue Zazhi/Journal of Biomedical Engineering》 (Shengwu Yixue Gongchengxue Zazhi/J. Biomed. Eng.)

年 卷 期：2022年第39卷第4期

页      面：776-783页

核心收录：

主　　题：Fibroblasts 

摘      要：Primary human hepatocytes (PHH) are the gold standard of in vitro human liver model for drug screening. However, a problem of culturing PHH in vitro is the rapid decline of cytochrome P450 (CYP450) activity, which plays an important role in drug metabolism. In this study, thermo-responsive culture dishes were used to explore the conditions for murine embryonic 3T3-J2 fibroblasts to form cell sheet. Based on the cell sheet engineering technology, a three-dimensional (3D) sandwich co-culture system of 3T3-J2 cell sheet/PHH/collagen gel was constructed. The tissue structure and protein expression of the model section were observed by hematoxylin eosin staining and immunofluorescence staining respectively. Phenacetin and bupropion were used as substrates to determine the activity of CYP450. The contents of albumin and urea in the system were determined by enzyme linked immunosorbent assay (ELISA). The results showed that the complete 3T3-J2 cell sheet could be obtained when the cell seeding density was 1.5×106/dish (35 mm dish) and the incubation time at low temperature was 60 min. Through cell sheet stacking, a 3D in vitro liver model was developed. Compared with the two-dimensional (2D) model, in the 3D model, the cell-cell and cell-matrix connections were tighter, the activities of cytochrome P450 CYP1A2 and cytochrome P450 CYP2B6 were significantly increased, and the secretion levels of albumin and urea were increased. These indexes could be maintained stably for 21 d. Therefore, cell sheet stacking is helpful to improve the level of liver function of 3D liver model. This model is expected to be used to predict the metabolism of low-clearance drugs in preclinical, which is of great significance for drug evaluation and other studies. © 2022 West China Hospital, Sichuan Institute of Biomedical Engineering. All rights reserved.