The DNAJC15 Knockout Huh-7 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population engineered to disrupt the DNAJC15 gene in the Huh-7 human hepatocellular carcinoma cell line. Comprising a heterogeneous pool of edited alleles, this model preserves biological variability while ensuring consistent loss-of-function phenotypes, circumventing clonal selection artifacts. The population format is particularly advantageous for large-scale functional genomics studies and drug screening campaigns, where physiological relevance and experimental throughput are prioritized.
Huh-7 cells, originally established from a hepatocellular carcinoma of a 57-year-old Japanese male, are a well-characterized liver epithelial line extensively employed to model hepatocyte function, lipid metabolism, and liver pathology. These cells support efficient hepatitis C virus replication and maintain critical hepatic attributes, including bile acid synthesis and cytochrome P450 activity, making them a robust platform for investigating liver cancer biology and antiviral responses.
The DNAJC15 protein functions as a mitochondrial co-chaperone that facilitates protein import and folding through interactions with the TIM23/TOM20 translocase complexes and the matrix chaperone HSPA9 (mortalin). It is essential for the assembly and enzymatic activity of respiratory chain complex I, specifically stabilizing the NDUFA9 subunit. DNAJC15 expression is regulated by mitochondrial stress signals and transcription factors NRF1 and ATF5. Downstream, it modulates apoptosis by influencing the pro-apoptotic BAX and anti-apoptotic BCL2 proteins, while also controlling reactive oxygen species (ROS) levels. Consequently, DNAJC15 disruption leads to impaired oxidative phosphorylation, diminished ATP synthesis, and increased apoptotic sensitivity, positioning it as a central coordinator of mitochondrial proteostasis and cell survival.
Within the hepatocellular carcinoma context, DNAJC15 knockout in Huh-7 cells provides a tractable system to dissect the contribution of mitochondrial dysfunction to hepatocarcinogenesis. Given the high metabolic demand of liver epithelial cells, loss of DNAJC15 perturbs mitochondrial respiration and stress adaptation, recapitulating features of mitochondrial disorders. This model is particularly instructive for elucidating how defects in mitochondrial protein import intersect with liver tumor progression, drug resistance, and the activation of the mitochondrial unfolded protein response (UPR).
Key applications encompass detailed mechanistic studies of mitochondrial protein homeostasis, interrogation of complex I deficiency in liver cancer, and high-throughput screening of compounds targeting mitochondrial function or apoptotic pathways. Compatible experimental techniques include Western blotting and RT-qPCR for gene and protein expression profiling, Seahorse-based mitochondrial respiration analyses, spectrophotometric complex I activity assays, Annexin V/PI flow cytometry for apoptosis quantification, and ATP/ROS detection assays. For technical inquiries or custom ordering, please contact Ascent Research.
