The GOLGA3 Knockout HT29 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal population of human HT-29 colorectal adenocarcinoma cells engineered to disrupt the GOLGA3 gene, thereby eliminating golgin A3 expression. This loss-of-function model provides researchers with a versatile tool for investigating GOLGA3-dependent processes in Golgi stack maintenance and vesicular tethering, free from clonal artifacts inherent to single-cell-derived lines. The polyclonal format comprises a heterogeneous pool of edited cells, enabling robust assessment of gene function within a biologically relevant epithelial cancer background.
HT-29 cells are a well-established human colorectal adenocarcinoma line that retains many characteristics of differentiated intestinal epithelial cells, including the ability to form polarized monolayers with tight junctions. This line serves as a cornerstone model in colorectal cancer research, offering insights into tumor cell proliferation, migration, and secretory pathway dynamics. Its use here as the host for GOLGA3 disruption permits the interrogation of Golgi biology in a pathophysiologically appropriate context, closely mimicking the intestinal tumor microenvironment.
At the molecular level, GOLGA3 encodes a cis-Golgi coiled-coil protein that functions as a key structural and regulatory element of the Golgi apparatus. It directly interacts with GM130 (GOLGA2) and GRASP65 (GORASP1) to maintain stack architecture and participates in tethering COPI-coated vesicles through cooperation with RAB1B. GOLGA3 is phosphorylated by CDK1 during mitosis, triggering its dissociation and subsequent Golgi unstacking??a critical step for organelle partitioning. Thus, GOLGA3 acts downstream of mitotic phosphorylation signals to regulate Golgi ribbon integrity, and its loss disrupts retrograde transport, impacting secretory pathway function and overall Golgi homeostasis.
Within the HT-29 adenocarcinoma model, GOLGA3 knockout holds particular significance for studying how Golgi structural dynamics influence colorectal cancer cell behavior. Aberrant Golgi organization is a common feature of transformed cells, yet the specific contributions of golgins to oncogenic phenotypes remain poorly defined. This knockout system allows for systematic analysis of GOLGA3 in secretory trafficking, glycoprotein processing, and mitotic Golgi fragmentation, potentially uncovering tumor-specific vulnerabilities linked to Golgi stress. The model bridges fundamental cell biology with translational oncology research.
These polyclonal knockout cells are well-suited for diverse experimental applications, including immunofluorescence staining of Golgi markers (e.g., GM130, Giantin), Western blotting for GOLGA3, and secretion reporter assays using Gaussia luciferase to quantify bulk exocytosis. Additional functional assays such as MTT-based proliferation and wound-healing migration studies provide complementary readouts of cell fitness and motility. Together, these approaches enable detailed dissection of GOLGA3??s roles in intestinal epithelial cancer cell biology and Golgi organization. For further details or lot-specific characterization data, please contact Ascent Research.
