EF1a-hTERT(GFP, Puro) Lentiviral Particles

The EF1a-hTERT (GFP, Puro) Lentiviral Particles are a high-performance genetic delivery tool designed for stable and constitutive expression of the human Telomerase Reverse Transcriptase (hTERT) gene. This system utilizes the human Elongation Factor 1 alpha (EF1a) promoter, which is preferred for its ability to drive robust, long-term transgene expression while remaining less susceptible to transcriptional silencing than the CMV promoter, particularly in stem cells and primary cultures. These particles are engineered as a polycistronic vector containing both a Green Fluorescent Protein (GFP) reporter for visual monitoring of transduction efficiency and a Puromycin resistance marker to allow for the rapid selection of stable cell lines. As a replication-incompetent lentiviral system, it ensures high-titer delivery and genomic integration, providing a reliable method for modifying hard-to-transfect mammalian cells with minimal toxicity.

The primary application of these lentiviral particles is the immortalization of primary cell lines, allowing researchers to bypass replicative senescence and extend the proliferative capacity of finite cell populations. By maintaining telomere length through hTERT overexpression, scientists can establish consistent in vitro models that retain the phenotypic characteristics of their original tissues, which is essential for longitudinal studies in cell biology. Beyond immortalization, the GFP-Puro dual marker system makes these particles ideal for optimizing transduction protocols and enriching modified populations via fluorescence-activated cell sorting (FACS) or antibiotic selection. These tools are frequently employed in cancer research to investigate the mechanisms of telomerase activation and in drug discovery as a platform for high-throughput screening. Additionally, they serve as a critical resource in regenerative medicine for studying the aging process and the development of engineered cell therapies.