The ABCB10 Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed for loss-of-function studies of the ABCB10 gene. These polyclonal cells provide a heterogeneous pool of knockout variants, enabling robust analysis of ABCB10-dependent mitochondrial processes without clonal selection artifacts. The targeted disruption of ABCB10 abolishes its transporter function, offering a genetically defined model to dissect heme biosynthesis, oxidative stress responses, and iron homeostasis in a human hepatic background.
This knockout model is engineered in the SK-HEP-1 host cell line, a widely used hepatic adenocarcinoma cell line originally derived from the ascitic fluid of a patient with liver adenocarcinoma. SK-HEP-1 cells retain hepatocyte-like features and are extensively employed as a model for hepatocyte function, liver cancer biology, and drug metabolism studies. Their epithelial origin and malignant context make them particularly suitable for investigating mitochondrial pathways relevant to hepatocellular carcinoma progression and therapeutic resistance.
ABCB10 encodes a mitochondrial inner membrane ATP-binding cassette transporter that plays a pivotal role in the early steps of heme biosynthesis and the maintenance of mitochondrial iron homeostasis. ABCB10 is transcriptionally regulated by GATA1 and NRF2, and its expression is modulated by cellular heme levels and iron regulatory proteins. The transporter physically interacts with components of the heme biosynthetic machinery, including ferrochelatase (FECH) and the mitoferrin iron importer SLC25A37, facilitating substrate delivery for heme synthesis. Downstream, ABCB10 functionally influences the expression of key heme pathway enzymes such as ALAS2 and FECH, supports mitochondrial iron-sulfur cluster biogenesis, and modulates the expression of ROS scavenging enzymes including SOD2. Disruption of ABCB10 leads to impaired heme production, accumulation of iron, and heightened sensitivity to oxidative stress due to compromised antioxidant defenses.
In the context of SK-HEP-1 liver cancer cells, ABCB10 knockout holds particular significance for studying the interplay between mitochondrial metabolism and malignant transformation. Hepatocellular carcinoma often exhibits altered heme and iron metabolism, and ABCB10 may influence tumor cell survival under oxidative stress and contribute to chemoresistance. This knockout model allows dissection of how heme deficiency and redox imbalance impact cancer cell signaling, apoptotic thresholds, and drug sensitivity. Additionally, it provides a platform to explore the role of ABC transporters in liver cancer pharmacology.
Researchers can employ this polyclonal knockout population in a variety of experimental approaches. Standard assays include western blotting to confirm loss of ABCB10 protein and assess compensatory changes in heme synthesis enzymes, RT-qPCR for quantifying transcript levels of heme pathway genes, and biochemical heme quantification. Functional studies leverage ROS measurement using DCFDA probes, apoptosis detection via Annexin V/PI staining, mitochondrial isolation for integrity and function analyses, and drug sensitivity testing to evaluate chemotherapeutic responses. For further technical information or custom ordering, please contact Ascent Research.
