OBJECTIVETo construct a plasmid expressing human imprinted gene PEG10 and to study the effect of overexpression of PEG10 in a stable transfected human normal liver cell line L02 and in non-liver derived cell line 293.

METHODSFull length cDNA of PEG10 open reading frame 1 was amplified and subcloned into a mammalian expression vector pcDNA3.1hisC. Recombinant plasmid was stably transfected into L02 cells and control cells via Lipofectamine 2000. The expression and the function of PEG10 in L02 cells and control group cells were examined using RT-PCR, Western blot, MTT and TUNEL.

RESULTSRecombinant plasmid was successfully constructed and confirmed through DNA sequencing and restriction digesting. PEG10 gene accelerated the growth of L02 cells and inhibited their apoptosis but it had no conspicuous effect on the non-liver derived cells.

CONCLUSIONThe constructed expressing vector pcDNA3.1hisC-PEG10 provides a useful tool for further study on the effects and mechanisms of PEG10. Over-expression of PEG10 may promote L02 cells' proliferation and inhibit their apoptosis, but not in the non-liver derived cell line 293.