Establishment of a -Deficient HepG2 Cell Line through CRISPR/Cas9 System and Evaluation of Its Effects on Replication.

BACKGROUND

serovar Typhimurium ( Typhimurium) is a common food-borne pathogen that causes gastroenteritis and can lead to life-threatening systemic disease when it spreads to vital organs, such as the liver. Stimulator of interferon genes (STING) is a crucial regulator of the host's innate immune response to viral infections, while its role in bacterial infections remains controversial. This study aims to establish a -deficient HepG2 cell line through the CRISPR/Cas9 system and evaluate its effects on replication.

METHODS

In this study, a knockout HepG2 cell line was constructed through the application of CRISPR/Cas9 technology. We assessed cell viability and proliferation using the CCK-8 assay. Subsequently, we investigated the effect of deletion on replication and the expression of type I interferon-related genes.

RESULTS

The knockout HepG2 cell line was successfully constructed using the CRISPR/Cas9 system. The proliferation capability was diminished in -deficient HepG2 cells, while Typhimurium replication in these cells was augmented compared to the wild-type (WT) group. Following infection, the transcriptional responses of type I interferon-related genes, such as and , were inhibited in -deficient HepG2 cells.

CONCLUSIONS

We successfully constructed a -deficient cell line. Our finding of increased Typhimurium replication in -deficient HepG2 cells provides the basis for further studies on pathogen-host interactions.