Induction of murine malignant lymphoma by 1-(2-chloro-ethyl)-3-cyclo-hexyl-1-nitrosourea, In vitro partial characterization

From 20 mice administered ethyl nitrosourea for over 5 months, 2 mice showed lung lymphoma, one of them is a murine malignant lymphoma which cultured and the cell line was newly established as short term culture. The cells were round in shape and had a tendency to make groups of floating clusters. Later these cells developed to proliferate as adherent cell culture. Our study showed that ethyl nitrosourea is selective carcinogen to induce lymphoma and lymphoma cultured cells is very useful for lymphoma studies.