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Different methods of detaching adherent cells significantly affect the detection of TRAIL receptors

胰蛋白酶化 受体 胰蛋白酶 细胞凋亡 细胞 单元格排序 活力测定 细胞培养 柠檬酸 离心 化学 分子生物学 细胞生物学 生物 生物化学 遗传学
作者
Bo Zhang,Hong Shan,Dan Li,Zhengran Li,Kangshun Zhu,Zaibo Jiang,Mingsheng Huang
出处
期刊:Tumori Journal [SAGE]
卷期号:98 (6): 800-803 被引量:20
标识
DOI:10.1177/030089161209800619
摘要

As a powerful technique allowing analysis of large numbers of cells, fluorescence-activated cell sorting (FACS) is used more and more widely. For FACS analysis, adherent cells are usually detached by trypsinization, followed by centrifugation and resuspension. However, trypsinization can cut off some receptors from the cell surface like fine scissors, which will affect the accuracy of FACS results. Though non-enzymatic methods such as citric saline buffer have been used to determine cell surface receptors, how much of the receptors is cut off by trypsinization has been rarely studied. This work aimed to investigate whether different methods of detaching adherent cells could affect the detection of cell surface receptors.Human hepatocellular carcinoma cell lines (HepG2, Huh7 and Hep3B) were detached enzymatically with trypsin-EDTA solution or non-enzymatically with citric saline buffer, and then the receptors of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) were detected by FACS analysis. Cell viability, cell cycle and apoptosis (sub-G1 fraction detected by FACS) of the trypsin-EDTA group and citric saline buffer group were also studied.Different methods of detaching adherent cells could significantly affect the detection of TRAIL receptors. Compared to the conventional trypsin-EDTA group, the non-enzymatic group showed a 3.42-fold increase in the mean fluorescence intensity index of DcR HepG2 and a 1.25-fold increase in DR Huh 7 (P <0.05). However, the viability, cell cycle and apoptosis of these cells were not affected.Citric saline buffer might be recommended as the first choice to detach adherent cells for FACS analysis of cell surface receptors.
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