The Journal of Immunology, Vol 156, Issue 5 1908-1915, Copyright © 1996 by American Association of Immunologists

ARTICLES

Engraftment of human tumor-infiltrating lymphocytes and the production of anti-tumor antibodies in SCID mice

SS Williams, FA Chen, H Kida, S Yokata, K Miya, M Kato, MP Barcos, HQ Wang, T Alosco, T Umemoto, BA Croy, EA Repasky and RB Bankert
Department of Molecular Immunology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA.

We report here the placement of nondisrupted 1-mm3 pieces of fresh human lung tumor biopsy tissue into the subcutis of severe combined immunodeficient (SCID) mice results in the engraftment of tumor- infiltrating leukocytes (TIL) in all but 5 of 148 mice inoculated with 39 different biopsy tissue specimens. In mice coengrafted with tumor and TIL the normal histologic architecture of the tumor and TIL interface was maintained for up to 22 wk. The TIL in the xenograft were shown to divide and were maintained exclusively at the site of tumor inoculation. It is established here that plasma cells in the TIL population produce Abs that react in western blots with tumor cell lysates. These Abs were shown to react with high and low m.w. proteins derived from both the membrane and cytosolic fractions of tumor cell lysates. The production of human Ig was found to be T cell dependent, and immunohistochemistry and in situ hybridization of DNA, using a human-specific cDNA probe, established the human identity of the tumor and TIL. High levels of human Ig in the sera of mice inoculated with tumor biopsy tissue are associated with the growth arrest of adenocarcinoma xenografts. Our results establish the co-engraftment of human tumors and TIL into SCID mice as new animal model with which to evaluate TIL function and novel therapeutic strategies that are designed to augment TIL anti-tumor activity.

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