Construction and identification of pIRES2-LIF-NT-3 bicistronic eukaryotic expression vector

Area of Science:

• Molecular Biology
• Gene Expression Systems
• Biotechnology

Background:

• Leukemia inhibitory factor (LIF) and neurotrophin-3 (NT-3) are crucial signaling molecules.
• Efficient co-expression systems are needed to study the combined functions of multiple genes.
• Existing expression vectors may not support simultaneous expression of specific gene pairs.

Purpose of the Study:

• To construct a novel bicistronic eukaryotic expression vector for co-expressing LIF and NT-3.
• To validate the efficient co-expression of LIF and NT-3 at both mRNA and protein levels.
• To provide a new tool for investigating the synergistic or independent roles of LIF and NT-3.

Main Methods:

• Polymerase chain reaction (PCR) was used to amplify LIF and NT-3 genes from human genomic DNA.
• LIF and NT-3 cDNA fragments were sequentially cloned into the pIRES2-EGFP vector.
• HEK293 cells were transfected with the constructed pIRES2-LIF-NT-3 plasmid, followed by RT-PCR and Western blotting.

Main Results:

• A functional bicistronic expression vector, pIRES2-LIF-NT-3, was successfully constructed.
• DNA sequencing and restriction analysis confirmed the correct insertion of LIF and NT-3 genes.
• Co-expression of both LIF and NT-3 was confirmed at the mRNA and protein levels in transfected cells.

Conclusions:

• The pIRES2-LIF-NT-3 plasmid is an effective bicistronic expression system for co-expressing LIF and NT-3.
• This novel vector facilitates simultaneous gene expression, enabling advanced research into LIF and NT-3 functions.
• The developed system offers a valuable platform for studying gene interactions and biological pathways involving LIF and NT-3.