Characterization of protein marker expression, tumorigenicity, and doxorubicin chemoresistance in two new canine mammary tumor cell lines
Journal
BMC Veterinary Research
Journal Volume
10
Journal Issue
1
Date Issued
2014
Author(s)
Abstract
Background: Canine mammary tumors (CMTs) are the most common type of cancer found in female dogs. Establishment and evaluation of tumor cell lines can facilitate investigations of the biological mechanisms of cancer. Different cell models are used to investigate genetic, epigenetic, and cellular pathways, cancer progression, and cancer therapeutics. Establishment of new cell models will greatly facilitate research in this field. In the present study, we established and characterized two new CMT cell lines derived from a single CMT.Results: We established two cell lines from a single malignant CMT specimen: DTK-E and DTK-SME. Morphologically, the DTK-E cells were large, flat, and epithelial-like, whereas DTK-SME cells were round and epithelial-like. Doubling times were 24 h for DTK-E and 18 h for DTK-SME. On western blots, both cell lines expressed cytokeratin AE1, vimentin, cytokeratin 7 (CK7), and heat shock protein 27 (HSP27). Moreover, investigation of chemoresistance revealed that DTK-SME was more resistant to doxorubicin-induced apoptosis than DTK-E was. After xenotransplantation, both DTK-E and DTK-SME tumors appeared within 14 days, but the average size of DTK-SME tumors was greater than that of DTK-E tumors after 56 days.Conclusion: We established two new cell lines from a single CMT, which exhibit significant diversity in cell morphology, protein marker expression, tumorigenicity, and chemoresistance. The results of this study revealed that the DTK-SME cell line was more resistant to doxorubicin-induced apoptosis and exhibited higher tumorigenicity in vivo than the DTK-E cell line. We anticipate that the two novel CMT cell lines established in this study will be useful for investigating the tumorigenesis of mammary carcinomas and for screening anticancer drugs. ? 2014 Lai et al.; licensee BioMed Central Ltd.
Subjects
Canine mammary tumor; Cell line; Chemoresistance; Heat shock protein 27; Tumorigenicity
SDGs
Other Subjects
antineoplastic agent; doxorubicin; tumor marker; animal; dog; dog disease; dose response; drug resistance; experimental neoplasm; female; gene expression regulation; Mammary Neoplasms, Animal; mouse; nude mouse; physiology; tumor cell line; Animals; Antineoplastic Agents; Biomarkers, Tumor; Cell Line, Tumor; Dog Diseases; Dogs; Dose-Response Relationship, Drug; Doxorubicin; Drug Resistance, Neoplasm; Female; Gene Expression Regulation, Neoplastic; Mammary Neoplasms, Animal; Mice; Mice, Nude; Neoplasms, Experimental
Type
journal article