The ABCB6 Knockout Huh-7 Polyclonal Cells product provides a heterogeneous population of Huh-7 cells with CRISPR/Cas9-mediated disruption of the ABCB6 gene. This polyclonal format contains a variety of loss-of-function mutations, offering a robust model for studying ABCB6 biology without clonal selection. The population is ideal for assays where average gene disruption effects are assessed, reflecting broad editing outcomes.
Huh-7 is a well-differentiated human hepatocellular carcinoma cell line derived from a 57-year-old Japanese male. It retains hepatocyte-like features, expresses liver-specific enzymes and transporters, and is widely used for hepatocellular carcinoma, hepatitis C virus research, and hepatic metabolism studies. Its epithelial and tumorigenic characteristics make it valuable for exploring liver cancer biology and stress responses.
ABCB6 encodes a mitochondrial outer membrane transporter essential for importing porphyrins into mitochondria for heme biosynthesis. Its activity is regulated by heme levels and interacts with the mitochondrial import machinery and ferrochelatase. Heme produced serves as a cofactor for hemoproteins like cytochromes and catalase, and regulates iron homeostasis via iron regulatory proteins. NRF2-driven oxidative stress responses also modulate ABCB6, linking mitochondrial iron utilization to antioxidant defense. Disruption of ABCB6 impairs heme synthesis, causing mitochondrial iron accumulation, oxidative stress, and affecting cytochrome c and iron-sulfur cluster biogenesis.
In Huh-7 hepatocellular carcinoma cells, ABCB6 knockout enables investigation of how altered heme metabolism and mitochondrial iron homeostasis influence liver tumor behavior. Given the liver’s role in iron trafficking and heme synthesis, ABCB6 loss may exacerbate oxidative stress and disrupt heme-dependent enzymes like cytochrome P450s. This model is relevant for exploring ABCB6 dysfunction in hepatocellular carcinoma progression and related disorders such as familial pseudohyperkalemia and dyskeratosis congenita. The polyclonal population also permits study of metabolic heterogeneity within tumor cell populations.
These polyclonal knockout cells support diverse functional studies, including western blotting and RT-qPCR to confirm ABCB6 ablation and gene expression changes. Heme levels can be measured by biochemical or LC-MS methods, while porphyrin accumulation assays reflect mitochondrial import blockade. Mitochondrial iron content and ROS detection reveal downstream oxidative burden, and flow cytometry for mitochondrial membrane potential assesses mitochondrial health. Applications span heme biosynthesis regulation, iron homeostasis, antioxidant response, and drug transporter studies. For further inquiries, contact Ascent Research.
