Characterization of a novel canine T-cell line established from a dog with cutaneous T-cell lymphoma

Expression and functional analysis of chemokine receptor 7 in canine lymphoma cell lines

C-C chemokine receptor 7 (CCR7) contributes to cell homing to lymph nodes (LNs). Recent studies reported that CCR7 is also expressed in tumor cells, which correlates with LN metastasis in various cancers. However, the expression of CCR7 in tumor cells is unknown in dogs due to the lack of appropriate antibodies. In the present study, a fusion protein of C-C chemokine ligand 19 (CCL19) was employed as an alternative method to CCR7 antibodies. The fusion CCL19 protein specifically detected CCR7 expressed in canine lymphoma cell lines, which showed active chemotaxis to both canine and mouse ligands. The present study will help further research on the involvement of canine CCR7 in LN metastasis.

Phenotypic analysis of mice xenografted with canine epitheliotropic cutaneous T-cell lymphoma cells

BACKGROUND

In canine epitheliotropic cutaneous T-cell lymphoma (ECTCL), neoplastic cells cause skin lesions and potentially metastasize to lymph nodes, blood and other organs. Murine models are potentially valuable for elucidating the molecular mechanisms responsible for regulation of ECTCL cell migration.

HYPOTHESIS/OBJECTIVES

To describe a phenotype of mice xenografted with canine ECTCL cells (EO-1 cells).

ANIMALS

Four NOD.CB17-Prkdc^scid /J (NOD SCID) mice were used.

METHODS AND MATERIALS

EO-1 cells were subcutaneously xenografted into NOD SCID mice. After four weeks, the development of tumour lesions in skin and other organs was investigated.

RESULTS

Mice developed skin lesions with metastasis to the lymph nodes, spleen, lung, blood and liver.

CONCLUSIONS AND CLINICAL IMPORTANCE

Mice xenografted with EO-1 cells may be useful for studying the pathogenesis of canine ECTCL.