GFP/Luc Reporter Cell Line - RT4

RT4 is a human bladder transitional cell papilloma carcinoma cell line originally derived from a grade I papillary tumor of the urinary bladder. It is commonly used as an in vitro model for studying urothelial carcinoma, particularly in research focusing on bladder cancer initiation, epithelial differentiation, and tumor progression. RT4 cells are characterized by relatively low-grade malignant features and retain several differentiated epithelial properties, making them suitable for modeling early-stage bladder cancer biology. The GFP/Luc Reporter Cell Line - RT4 is established through stable genetic engineering to co-express green fluorescent protein (GFP) and firefly luciferase (Luc) reporter genes in RT4 cells. This dual-reporter system allows simultaneous visualization by fluorescence microscopy and quantitative assessment through bioluminescence imaging, while maintaining the biological characteristics of the parental RT4 cell line.

The RT4-GFP/Luc reporter cell line is widely applied in bladder cancer research, particularly in studies involving tumor growth dynamics, implantation efficiency, and in vivo imaging of xenograft models. The luciferase signal enables non-invasive, longitudinal monitoring of tumor development and response to therapeutic interventions, while GFP expression supports real-time visualization of cellular localization and morphological changes in vitro and in excised tissues. This model is particularly valuable for evaluating anti-cancer drug efficacy, including compounds targeting cell proliferation and differentiation pathways in urothelial carcinoma. In addition, it is used in mechanistic studies investigating gene regulation, tumor microenvironment interactions, and epithelial–mesenchymal transition-related processes. Overall, the RT4-GFP/Luc cell line provides a stable and reliable platform for preclinical bladder cancer research and for assessing therapeutic strategies in early-stage urothelial carcinoma models.