EF1a-hAd5/E1A(RFP, Bla) Lentiviral Particles

EF1α-hAd5/E1A (RFP, Bla) lentiviral particles represent a cutting-edge tool in gene manipulation and cell engineering. This lentivirus is designed for efficient expression of the human adenovirus type 5 (hAd5) E1A gene under the control of the EF1α promoter, ensuring stable and sustained expression across multiple cell types. The introduction of a red fluorescent protein (RFP) reporter gene allows for easy observation and tracking of transduced cells via fluorescence microscopy or flow cytometry. Furthermore, the blast fungicide resistance gene (Bla) provides a robust screening mechanism, enabling researchers to enrich successfully transduced cells by removing untransduced cell populations through blast fungicide treatment. This bifunctional system combines the high transduction efficiency typical of lentiviral vectors with stable integration into the host genome, achieving long-term expression without gene silencing. The lentiviral backbone is non-replicative, further ensuring safety and minimizing the risk of viral replication in target cells.

The primary application of these lentiviral particles is cell immortalization, a transformative process that extends the lifespan of primary cells for continuous in vitro studies. The hAd5 E1A protein exerts a potent immortalization effect by disrupting key cell cycle regulators such as retinoblastoma protein (pRb), enabling primary cells (e.g., epithelial cells, fibroblasts, or stem cells) to bypass senescence and proliferate indefinitely. This makes the vector invaluable for establishing stable cell lines from difficult-to-culture primary tissues, which are crucial for disease modeling, drug screening, and mechanistic studies. In addition to immortalization, the RFP reporter gene can serve as a real-time indicator for monitoring transduction efficiency and transgene expression dynamics, while blast fungicide resistance enables large-scale screening of purified transduced cell populations.