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ATCC highly recommends that appropriate personal protective equipment is always used when handling vials. For cultures that require storage in liquid nitrogen, it is important to note that some vials may leak when submersed in liquid nitrogen and will slowly fill with liquid nitrogen. Upon thawing, the conversion of the liquid nitrogen back to its gas phase may result in the vial exploding or blowing off its cap with dangerous force creating flying debris. Unless necessary, ATCC recommends that these cultures be stored in the vapor phase of liquid nitrogen rather than submersed in liquid nitrogen.
LS 174T is a variant of LS 180 (ATCC CL-187) that has been maintained by using trypsin in the subculture protocol. It is more easily subcultivated than that parent line and, like LS 180, it is reported to produce large amounts of carcinoembryonic antigen (CEA).
Electron microscopic studies revealed abundant microvilli and intracytoplasmic mucin vacuoles. RefTom BH, et al. Human colonic adenocarcinoma cells. I. Establishment and description of a new line. In Vitro 12: 180-191, 1976. PubMed: 1262041
They are negative for p53 antigen expression, but positive for mRNA expression.
LS 174T cells stain positively for cytokeratins.
The line is positive for expression of c-myc, N-myc, H-ras, N-ras, Myb, and fos oncogenes. RefTrainer DL, et al. Biological characterization and oncogene expression in human colorectal carcinoma cell lines. Int. J. Cancer 41: 287-296, 1988. PubMed: 3338874
K-ras and sis oncogene expression were not detected.
To insure the highest level of viability, thaw the vial and initiate the culture as soon as possible upon receipt. If upon arrival, continued storage of the frozen culture is necessary, it should be stored in liquid nitrogen vapor phase and not at -70°C. Storage at -70°C will result in loss of viability.
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Tom BH, et al. Human colonic adenocarcinoma cells. I. Establishment and description of a new line. In Vitro 12: 180-191, 1976. PubMed: 1262041
Tom BH, et al. Process of producing carcinoembryonic antigen. US Patent 4,228,236 dated Oct 14 1980
Chen TR, et al. Intercellular karyotypic similarity in near-diploid cell lines of human tumor origins. Cancer Genet. Cytogenet. 10: 351-362, 1983. PubMed: 6652615
Gastl GA, et al. Interleukin-10 production by human carcinoma cell lines and its relationship to interleukin-6 expression. Int. J. Cancer 55: 96-101, 1993. PubMed: 8344757
Trainer DL, et al. Biological characterization and oncogene expression in human colorectal carcinoma cell lines. Int. J. Cancer 41: 287-296, 1988. PubMed: 3338874