PMID- 21544806 OWN - NLM STAT- MEDLINE DCOM- 20130124 LR - 20210105 IS - 1097-0215 (Electronic) IS - 0020-7136 (Linking) VI - 129 IP - 9 DP - 2011 Nov 1 TI - Humanized tumor mice--a new model to study and manipulate the immune response in advanced cancer therapy. PG - 2194-206 LID - 10.1002/ijc.26159 [doi] AB - The immunological impact on antibody-based anticancer therapies remains incompletely understood due to the lack of appropriate animal models for in vivo analysis. Here, we present a novel humanized tumor mouse (HTM) model, generated by concurrent transplantation of human hematopoietic stem cells (HSCs) and human breast cancer cells in neonatal NOD-scid IL2Rgamma(null) mice. Five weeks after intrahepatic transplantation, a functional human immune system was developed in all organs, and, in addition, tumor cells were detectable in lung and bone marrow (early dissemination). After 3 months posttransplant, tumor-cell effusions and macroscopic tumors associated with liver or spleen were found. Furthermore, disseminated cells in different lymphoid and nonlymphoid organs were measurable. Tumor growth was accompanied by specific T-cell maturation and tumor cell-specific T-cell activation. In addition, Natural-Killer cell accumulation and activation were observed in HTM, which was further enhanced upon IL-15 treatment facilitating the possibility of immune cell modulation in, e.g., antibody-dependent cellular cytotoxicity-based immunotherapeutic approaches. This novel mouse model makes it possible to combine transfer of MHC mismatched tumor cells together with human HSCs resulting in a solid coexistence and interaction without evidence for rejection. Overall, humanized tumor mice represent a powerful in vivo model that for the first time permits the investigation of human immune system-related target cancer therapy and resistance. CI - Copyright (c) 2011 UICC. FAU - Wege, Anja K AU - Wege AK AD - Institute of Immunology, University of Regensburg, Regensburg, Germany. FAU - Ernst, Wolfgang AU - Ernst W FAU - Eckl, Judith AU - Eckl J FAU - Frankenberger, Bernhard AU - Frankenberger B FAU - Vollmann-Zwerenz, Arabel AU - Vollmann-Zwerenz A FAU - Mannel, Daniela N AU - Mannel DN FAU - Ortmann, Olaf AU - Ortmann O FAU - Kroemer, Alexander AU - Kroemer A FAU - Brockhoff, Gero AU - Brockhoff G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110721 PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 0 (Interleukin-15) SB - IM MH - Animals MH - Breast Neoplasms/*immunology/*therapy MH - Cell Line, Tumor MH - *Disease Models, Animal MH - Female MH - Graft Rejection/immunology MH - Hematopoietic Stem Cell Transplantation MH - Humans MH - Interleukin-15/immunology/pharmacology MH - Killer Cells, Natural/drug effects/immunology MH - *Mice MH - Mice, Inbred NOD MH - Mice, Knockout MH - Mice, SCID MH - T-Lymphocytes/immunology EDAT- 2011/05/06 06:00 MHDA- 2013/01/25 06:00 CRDT- 2011/05/06 06:00 PHST- 2010/11/10 00:00 [received] PHST- 2011/04/12 00:00 [accepted] PHST- 2011/05/06 06:00 [entrez] PHST- 2011/05/06 06:00 [pubmed] PHST- 2013/01/25 06:00 [medline] AID - 10.1002/ijc.26159 [doi] PST - ppublish SO - Int J Cancer. 2011 Nov 1;129(9):2194-206. doi: 10.1002/ijc.26159. Epub 2011 Jul 21.