EF1a-hCDK4(GFP, Puro) Lentiviral Particles

The EF1a-hCDK4(GFP, Puro) lentiviral particle is a cutting-edge tool for gene manipulation and cell engineering, combining several key features to significantly improve experimental efficiency and versatility. At the heart of this system is the EF1a promoter, a potent constitutive promoter renowned for its stable and sustained expression in a wide range of mammalian cell types, including dividing and non-dividing cells. This promoter drives the expression of the human CDK4 gene, a key regulator of the cell cycle that promotes the transition from G1 to S phase by phosphorylating retinoblastoma protein (Rb). This targeted expression is particularly important for inducing immortalization of primary cells, which typically have a limited lifespan in vitro. Furthermore, this lentiviral vector integrates a GFP reporter gene, enabling easy observation and tracking of transduced cells via fluorescence microscopy or flow cytometry.

The applications of the EF1a-hCDK4(GFP, Puro) lentiviral particle are wide-ranging and far-reaching, especially in the fields of cell biology and regenerative medicine. One of its main applications is cell immortalization. By introducing CDK4, the replicative lifespan of primary cells (such as fibroblasts, epithelial cells, or stem cells) can be extended, as these cells age after a limited number of passages. This is crucial for constructing stable cell lines that can maintain their physiological characteristics, enabling long-term studies of cellular processes, disease models, and drug screening. For example, in cancer research, immortalized cell lines expressing CDK4 can mimic oncogenic transformation and serve as a platform for studying cell cycle dysregulation, tumor progression, and treatment response. GFP reporter genes facilitate real-time monitoring of cell behavior and localization, making them ideal for live-cell imaging, migration assays, and co-culture experiments.