Epigenetic Regulation of Stable SARS-CoV-2 RBD-sfGFP Expression in Primary Human Splenic Fibroblasts
This study demonstrates that immortalized human splenic fibroblasts can stably express SARS-CoV-2 RBD-sfGFP for over three months, validating them as a viable platform for recombinant protein production while revealing that expression stability is maintained through oscillatory dynamics rather than progressive silencing, albeit with increasing inter-cellular heterogeneity over time.