The KIF5B Knockout HT29 Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal population of HT29 human colorectal adenocarcinoma cells harboring disruption of the KIF5B gene. This product offers researchers a versatile loss-of-function model to interrogate KIF5B-dependent intracellular transport, mitochondrial dynamics, and associated signaling pathways in a colorectal cancer background. The polyclonal format provides a heterogeneous knockout pool, facilitating studies that recapitulate population-level effects of KIF5B ablation without the selective pressures of monoclonal expansion.
The parental HT29 cell line, derived from a 44-year-old female patient, is a well-characterized model of human colorectal adenocarcinoma with epithelial morphology. Under specific culture conditions, HT29 cells can undergo enterocytic differentiation, expressing intestinal markers and forming polarized monolayers. This feature enables investigation of KIF5B function not only in proliferative cancer cells but also in differentiated intestinal epithelia, expanding the scope of experimental applications.
KIF5B encodes the kinesin-1 heavy chain, a core subunit of the plus-end-directed microtubule motor complex that drives anterograde transport of diverse cargoes. It forms heterotetramers with kinesin light chains (KLC1) and engages adaptor proteins??including TRAK1, TRAK2, Miro1, JIP1, and JIP2??to facilitate the movement of mitochondria, lysosomes, vesicular cargoes, and messenger ribonucleoprotein complexes along microtubules. Upstream input from kinases such as PI3K, AKT, CaMKII, and JNK, as well as the Miro1?CTRAK1 calcium-sensing module, modulates motor activity. KIF5B-dependent transport regulates mitochondrial distribution, lysosomal positioning, mRNA localization at focal adhesions, and autophagy flux, underscoring its significance in cell migration, division, and ciliogenesis.
In colorectal adenocarcinoma, dysregulation of intracellular transport machinery contributes to tumor progression, invasion, and therapeutic resistance. KIF5B-mediated mitochondrial trafficking can support the elevated bioenergetic demands of cancer cells, while its role in mRNA localization influences focal adhesion turnover and cell motility. HT29 cells provide a relevant backdrop to dissect how KIF5B-driven transport impacts oncogenic signaling, including the Wnt pathway, and how its loss alters differentiation-dependent cargo distribution. This model thus enables elucidation of KIF5B??s contributions to colorectal cancer pathophysiology.
Researchers can employ these KIF5B knockout HT29 polyclonal cells to dissect the roles of kinesin-1-dependent transport in colorectal cancer cell biology. Key applications include live-cell imaging with MitoTracker to monitor mitochondrial motility, wound healing and transwell invasion assays to assess migration and invasion, and co-immunoprecipitation to map protein interactions within the kinesin complex. Transcriptomic profiling via RNA-seq and protein expression analysis by western blotting and RT-qPCR can reveal compensatory changes in trafficking pathways. Additionally, the differentiation capacity of HT29 cells allows investigation of KIF5B??s role in polarized epithelial transport. For further information or to discuss custom applications, please contact Ascent Research.
