LS180 Cells

LS180 is a human colon adenocarcinoma cell line established from the primary tumor of an adult female patient with moderately well-differentiated colon adenocarcinoma that had metastasized to the pericolic adipose tissue. The cells are epithelial in morphology, with an oval to polygonal shape and diameters ranging from 20 to 40 μm. They exhibit ultrastructural characteristics typical of normal colonic mucosal cells, including abundant microvilli-particularly prominent in secretory cells-and the presence of intracytoplasmic mucin vacuoles. These cells display hallmark features of neoplasia, including high levels of carcinoembryonic antigen (CEA) production and the ability to form tumors in both hamster cheek pouches and immunodeficient mice, indicating their tumorigenic potential in vivo.

LS180 cells were notable for their exceptionally high levels of CEA production, releasing approximately 900 times more CEA per cell into the culture medium and carrying 30 times more cell-associated CEA than other colon cancer lines such as HT-29. This makes LS180 a valuable model for studying the biochemical, immunological, and functional properties of neoplastic colonic epithelium, particularly in relation to CEA-associated tumor markers. The cells have been karyotyped and confirmed to have abnormal chromosomal complements consistent with neoplastic transformation. Their epithelial identity and tumor-associated traits make them suitable for use in immunological assays, drug screening, and studies on colorectal cancer biology and therapeutic response.

Additionally, LS180 is part of the Cancer Cell Line Encyclopedia (CCLE), where it has been deeply characterized through multi-omics profiling including proteomics, transcriptomics, and mutation data. LS180 is classified as a microsatellite instable (MSI) cell line, a phenotype associated with a hypermutated genome and known to affect proteome organization and therapeutic vulnerabilities. The proteomic analysis of LS180 revealed that MSI cell lines, including LS180, exhibit significant dysregulation of protein complexes involved in mutation surveillance and translational control, offering insights into mechanisms of drug sensitivity and resistance. The proteomic data further support that large-scale pathway-level coordination in protein expression in LS180 is decoupled from RNA expression, underscoring the importance of direct protein-level investigations.