Expression and cytotoxicity of EGFP-labeled D-amino acid oxidase in HeLa cells.
To observe the expression of R. gracilis D-amino acid oxidase (DAAO) gene labeled by EGFP in HeLa cells and how it mediates cytotoxicity, DAAO cDNA and EGFP gene were cloned into Eukaryotic expression vector pIRES to construct DAAO gene expression vector pIRES-DAAO. HeLa cells were transfected with pIRES-DAAO in vitro. Expression of EGFP gene in HeLa-D cells was observed under a fluorescent microscope. The efficiency of transfection was analyzed by flow cytometry (FCM). The fluorescent cells were screened by FCM and were named HeLa-D. The activity of HeLa-D cells was detected by MTT colorimetric assay after they were treated with D-Ala at various concentrations. The results indicted that expression of EGFP gene in HeLa-D cells was seen under fluorescent microscope and HeLa-D cells were screened by FCM. Apparently,the prodrug D-Ala killed HeLa-D cells. These results demonstrate that EGFP gene can be regarded as a reporter gene to screen the cells transduced with DAAO quickly, and DAAO/D-Ala suicide gene system may prove helpful in gene therapy of cancer.
He
Zhi-Ying
ZY
Department of Cell Biology, Second Military Medical University, Shanghai 200433, China.
Jiang
Qian-Li
QL
Chen
Yuan-Xiao
YX
Wen
Li-Min
LM
Yao
Yu-Cheng
YC
Wang
Xin-Min
XM
Li
Wen-Lin
WL
Wang
Jian-Min
JM
Hu
Yi-Ping
YP
D000409:Alanine / Q000494:pharmacology*; D002470:Cell Survival / Q000187:drug effects; D003605:D-Amino-Acid Oxidase / Q000235:genetics*; D015316:Genetic Therapy; D005822:Genetic Vectors; D049452:Green Fluorescent Proteins / Q000235:genetics*; D006367:HeLa Cells; D006801:Humans
D049452:Green Fluorescent Proteins; D003605:D-Amino-Acid Oxidase; D000409:Alanine