Establishment of a canine monocyte cell line.

A canine monocyte cell line was established from the peripheral blood sample collected from a healthy young male Beagle dog. The cloned cells grew easily and were serially passaged in vitro in the medium, a slight modification further made on Dulbecco's modified Eagle medium, supplemented with 10% fetal bovine serum. The morphology of single cell was shown in triangular or round form, however, it became epithelioid in a densely grown monolayer. Non-specific esterase was detected in all cells by a cytochemical examination. The cells reacted rapidly to the addition of a small amount of LPS and differentiated to the cells of morphologically typical macrophages. Both complement receptor (CD35) and Fc gamma receptor (CD64) were demonstrated on the cell membrane.