Both amphotropic and ecotropic packaging cells are capable of producing viral particles (replication deficient) that can induce murine cells. If retrovirus system is what you are using, they work better on dividing cells and this website might be of help. http://www.stanford.edu/group/nolan/tutorials/tutorials.html

Also the publications listed on the site.

Thank you, Dong. I intend to use a lentiviral system, so, I believe that works in DO11.10. But, I don't know if DO11.10 is easily infected. Thanks again!

Lentiviral vectors are usually produced in 293T cells, and are pseudotyped with VSV-G that confers them infectivity of a large range of species, including human and murine cells. In that sense the resulting vector are amphotropic, but you don't speak of eco- or amphotropic vectors in this context....