Human CRBN Stable Cell Line - HEK293

p53, among the most extensively studied tumor suppressors, plays a critical role in regulating apoptosis triggered by DNA damage. The researchers discovered that CRBN protects against DNA damage-induced apoptosis in cell lines and primary cells. Mechanistic studies reveal that CRBN interacts directly with p53, inhibiting its interaction with anti-apoptotic regulators Bcl-2 and Bcl-XL. This interaction preserves mitochondrial membrane potential and suppresses caspase-3 and PARP-1 cleavage, thereby inhibiting apoptosis in response to etoposide-induced DNA damage. Crbn knockout mice further validate these findings, highlighting CRBN's role in regulating DNA damage response and suggesting therapeutic implications for DNA damage-associated diseases.

Figure 1. The Human CRBN Stable Cell Line (HEK293) was created by the researchers to illustrate how CRBN interacts with p53. They used several techniques, including GST-tagged p53 incubation with His6-CRBN, co-transfection of GFP-CRBN and Flag-p53, and immunoprecipitation with anti-CRBN antibody. These methods clarified the relationship between CRBN's DNA-binding domain (DBD) and N terminus and p53. (Zhou L, et al., 2019)