Abstract
Objective To construct h n bone marrow mesenchymal stem cell line genetically modified with human proenkephalin gene. Methods The packaging cell line Phoenix-293T was transfected with the recombinant pBABE-PENK vector to aquire virus. The recombinant virus was then collected and used to infect hMSCs. Stable expression of proenkephalin gene and leucine enkephalin protein and the concentration of leucine enkephalin protein were detected by RT-PCR, immunofluorescence and ELISA respectively. Results The expression of proenkephalin gene and leucine enkephalin protein were significantly up-regulated in the hMSC-PENK cells, and the concentration of leucine enkephalin protein was also increased in the culture medium. Conclusion A human mesenchymal stem cell line that expresses proenkephalin gene and secrets enkephalin was successfully established. Key words: Enkephalins; Organisms, genetically modified; Stem cells; Bone marrow
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