EF1a-hAd5/E1A(GFP, Puro) Lentiviral Particles

The EF1a-hAd5/E1A (GFP, Puro) lentiviral particle is a sophisticated tool for gene manipulation and cell engineering. This lentiviral vector system is engineered to express the hAd5 E1A gene under the control of the EF1a promoter. The EF1a promoter is a highly efficient and constitutive promoter, ensuring stable and sustained transgenic expression in a variety of mammalian cell types. The introduction of the GFP reporter gene provides a simple and intuitive method to monitor transduction efficiency and track transduced cells in real time, facilitating experiments requiring live-cell imaging or fluorescence-based cell sorting. Furthermore, the puromycin resistance gene provides a robust screening mechanism, enabling researchers to enrich successfully transduced cells through antibiotic pressure, ensuring a high-purity cell population for downstream applications. The lentiviral backbone itself offers several advantages, including the ability to transduce both dividing and non-dividing cells, stable genome integration for long-term expression, and a lower risk of insertional mutations compared to other viral vectors. These characteristics make this system highly reliable for constructing stable cell lines and conducting long-term studies.

The primary application of these lentiviral particles lies in cell immortalization, a crucial process for extending the lifespan of primary cells, which typically age after a limited number of passages. By delivering the hAd5 E1A gene (a known immortalizing oncogene), this vector effectively bypasses cellular senescence mechanisms, allowing primary cells to proliferate indefinitely while maintaining key physiological characteristics. This capability is essential for establishing regenerative cell resources for long-term experiments in fields such as cancer research, drug screening, and regenerative medicine. Beyond immortalization, these particles are also widely used in functional genomics research, where stable expression of E1A can elucidate its role in cell cycle regulation, apoptosis, and cell transformation.