Description

The DNM1L Knockout HeLa Cell Line is a CRISPR/Cas9-mediated gene-disrupted cell line engineered to ablate expression of DNM1L, the gene encoding dynamin-related protein 1 (DRP1). This knockout model serves as a clean loss-of-function system for dissecting the roles of DRP1 in mitochondrial dynamics, apoptosis, and related signaling networks. The cell line is provided as a stable knockout population, enabling robust and reproducible experimental applications. Through targeted disruption of DNM1L, researchers can investigate the immediate and downstream consequences of impaired mitochondrial fission without the confounding effects of transient knockdown approaches.

The host cell line, HeLa, is an immortalized human cervical epithelial adenocarcinoma line that is positive for human papillomavirus type 18 (HPV-18). HeLa cells have been a cornerstone of biomedical research for decades, extensively employed in cancer biology, cell signaling, virology, and pharmacology. Their rapid growth, ease of culture, and well-characterized genetic background make them an ideal platform for creating isogenic knockout models. The DNM1L knockout in this context offers a genetically defined system in a cell type that endogenously exhibits robust mitochondrial dynamics and apoptotic machinery.

DNM1L encodes the large GTPase DRP1, which cycles between the cytosol and the outer mitochondrial membrane. DRP1 oligomerizes to constrict and sever mitochondrial tubules, driving organelle fission. This process is tightly regulated by upstream factors such as the mitochondrial receptors MFF, MIEF1, MIEF2, and Fis1, along with kinases like AMPK and ERK1/2, and phosphatases including calcineurin. Calcium influx and oxidative stress further modulate DRP1 recruitment. Downstream, fission facilitates cytochrome c release, BAX/BAK oligomerization, and caspase-9/-3 activation, and is essential for segregating damaged mitochondrial domains for PINK1/PRKN-mediated mitophagy. The knockout therefore disrupts a core node linking mitochondrial quality control to cell death and metabolic adaptation.

In the HeLa adenocarcinoma background, DNM1L disruption profoundly alters mitochondrial morphology, resulting in elongated, hyperfused networks. This impairment of fission undermines programmed cell death via intrinsic pathways, potentially conferring chemoresistance. Defective mitophagy leads to accumulation of dysfunctional mitochondria, perturbing energy metabolism and redox homeostasis. The model enables study of how mitochondrial dynamics intersect with cancer cell survival, metabolic reprogramming, and stress responses. By comparing parental and knockout lines, investigators can deconvolute fission-dependent signaling through AMPK/mTOR, calcium, and ROS pathways.

This DNM1L knockout HeLa cell line is suitable for a broad array of research applications. It can be used to probe mitochondrial fission mechanisms in apoptosis, visualize mitochondrial networks via immunofluorescence with MitoTracker or TOM20, and assess metabolic flux using Seahorse analyzers. Flow cytometry enables quantification of mitochondrial mass and membrane potential, while Western blotting and co-immunoprecipitation analyze protein interactions. The model is valuable for drug screening targeting apoptosis or mitophagy, and for investigating neurodegenerative and metabolic disorders. For further information or to discuss custom applications, please contact Ascent Research.