@article{oai:niigata-u.repo.nii.ac.jp:00006354, author = {SATO, Norimitsu L. and KATO, Akiko}, issue = {2}, journal = {Acta medica et biologica, Acta medica et biologica}, month = {Jun}, note = {It has been shown that adoptive immune transfer in mice for Ehrlich ascites tumors (EAT) is successful in a genetically defined combination such as B6 as donor and B6-nu/nu as recipient. Among allogeneic mouse strains, the adoptive immune transfer was rarely successful with a few exceptions. To observe the mechanism, the fate of intraperitoneally transferred donor spleen cells in the recipients was monitored by staining the cells with fluorescent PKH-26 dye, and using some typical donor and recipient combinations. The results are as follows. Spleen cells from B6-Ly-2^a, 3^a mice were very effective in suppressing subcutaneous EAT outgrowth in B6-nu/nu mice but not in DBA/1 or in ddY-drm. Spleen cells of B6-Ly-2^a, 3^a mice were alive and infiltrated everywhere in B6-nu/nu mice. Some of the effector cells both reached and made contact with EAT cells and lethally affected the tumor cells. Accordingly, EAT outgrowth in B6-nu/nu mice was remarkably suppressed and no solid tumor formation was recognized. On the other hand, spleen cells from B6-Ly-2^a, 3^a mice were killed at an early stage by peritoneal macrophages in the recipients in DBA/1 or in ddY-prg mice, and they did no reach the EAT site. As a result, subcutaneous EAT progressed gradually and formed a solid tumor. The spleen cells of B6-Ly-2^a, 3^a mice which were subcutaneously inoculated into the recipients in a mixture form with EAT cells were sufficiently active for suppressing EAT outgrowth both in DBA/1 and ddY-prg mice. From the results, it is concluded that the contact of donor spleen cells with EAT cells in the recipient without any disturbance is highly important in producing a suppressive effect on EAT in vivo. At an early stage in the spleen cell transfer, recipient macrophage activity is the first barrier to the effective donor cells transferred.}, pages = {67--74}, title = {The Efficiency of Adoptive Immunotherapy for Ehrlich Tumors in Miceand Fate of the Transferred Spleen Cells in the Recipient}, volume = {47}, year = {1999} }