Generation and characterization of novel canine malignant mast cell line CL1

Tzu-Yin Lin, Rachael Thomas, Pei Chien Tsai, Matthew Breen, Cheryl A. London

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Studies using the currently available malignant canine mast cell lines and bone marrow-derived cultured mast cells (BMCMCs) have provided an in-depth understanding of normal and neoplastic canine mast cell biology. However, many of the currently available malignant canine mast cell lines possess limitations, including loss of cell surface markers and inability to bind canine IgE. We have recently generated a novel mast cell line, CL1, from an 11-year-old spayed female Labrador retriever diagnosed with systemic mastocytosis and neoplastic effusion. The CL1 cells express KIT, FcεRI, CD44, CD45, CD14, CD11a, CD11b and CD18 as well as chymase. Interestingly, these cells express wild-type KIT, with no evidence of autophosphorylation, but are able to proliferate independently without the addition of exogenous stem cell factor (SCF), KIT ligand. However, stimulation of CL1 cells with SCF induces KIT phosphorylation promoting cell proliferation. The CL1 cells retain functional properties of mast cells, degranulating in a dose-dependent manner in response to both IgE cross-linking and chemical stimulation. Lastly, cytogenetic evaluation revealed several recurrent tumor-associated chromosome copy number imbalances in the CL1 line. In summary, the CL1 cell line possesses phenotypic and functional properties similar to those found in canine BMCMCs, and will likely be a useful tool to study mast cell biology, factors regulating transformation of mast cells, cytogenetic abnormalities in mast cell tumors, and novel preclinical therapies.

Original languageEnglish (US)
Pages (from-to)114-124
Number of pages11
JournalVeterinary Immunology and Immunopathology
Volume127
Issue number1-2
DOIs
StatePublished - Jan 15 2009
Externally publishedYes

Keywords

  • Cell line
  • KIT
  • Mast cell tumor

ASJC Scopus subject areas

  • Immunology
  • veterinary(all)

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