The HINT3 Knockout HAP1 Polyclonal Cells product is a polyclonal knockout cell population derived from the HAP1 human haploid cell line, engineered using CRISPR/Cas9-mediated gene disruption at the HINT3 locus. This pooled population provides a genetically heterogeneous loss-of-function model for studying HINT3-dependent mitochondrial processes and apoptotic signaling pathways.
The HAP1 cell line is a near-haploid human cell line derived from the KBM-7 chronic myeloid leukemia (CML) cell line, carrying the BCR-ABL fusion characteristic of CML. It exhibits fibroblast-like morphology and retains haploidy in most chromosomes except chromosome 8. Originating from a male donor, HAP1 cells are widely used for functional genomics and genetic screens due to their haploid nature, which facilitates gene knockout studies.
HINT3 encodes a mitochondrial acyl-AMP hydrolase implicated in nucleotide metabolism and mitochondrial homeostasis. The protein is involved in the regulation of apoptosis, where its loss disrupts the balance of BCL2 family proteins, leading to aberrant cytochrome c release from the mitochondrial intermembrane space. Upstream regulators include the transcription factors SP1 and TP53, while downstream effectors encompass pro-apoptotic BAX, anti-apoptotic BCL2 family members, cytochrome c, APAF1, and the initiator caspase-9 and executioner caspase-3. HINT3 is predicted to interact with calmodulin, based on homology to HINT1, suggesting a link to calcium signaling. In the mitochondrial apoptotic pathway, HINT3 acts upstream of cytochrome c release, influencing apoptosome formation and caspase activation.
In the HAP1 CML background, HINT3 knockout provides a unique platform to investigate how disruption of mitochondrial nucleotide metabolism sensitizes leukemic cells to apoptosis. The haploid nature of HAP1 simplifies genetic analysis, making this model ideal for studying gene-dosage effects and conducting high-throughput screens. Loss of HINT3 impairs mitochondrial apoptotic signaling, potentially mimicking pathophysiological conditions that contribute to cancer cell survival and chemoresistance.
This polyclonal knockout population is suitable for functional genomics studies, apoptosis mechanism dissection, mitochondrial dysfunction research, and cancer drug target validation. Researchers can perform western blotting to assess protein levels of BCL2 family members and cytochrome c, RT-qPCR for transcript analysis, flow cytometry to measure mitochondrial membrane potential, cytochrome c release assays, cell viability assays, and immunofluorescence microscopy. The model also supports haploid genetic screens to identify synthetic lethal interactions. For more information, please contact Ascent Research.
