Abstract
Abstract The “R2G2” (B6;129-Rag2tm1FwaIL2rgtm1Rsky/DwlHsd) knockout mouse is the latest advancement to provide an alternative option in the highly immunodeficient mouse model category for the oncology, immunology and other biomedical research communities. This model was generated by backcrossing an IL2rg (common gamma) knockout model to a RAG2 (recombinase activating gene) knockout model. The resulting mouse lacks various cytokines including IL-2, IL-4, IL-7, IL-9 and IL-15. In addition, this model lacks B cells, T cells, NK cells and has a deficit in lymphocyte development. The R2G2 model is not only ultra immunodeficient, but provides a model that is less leaky and more tolerant to gamma radiation than traditional SCID models. This model is particularly useful for both tumor transplantation and humanization studies. Herein we describe the development and characterization of the R2G2 model, which includes breeding history, growth curve, CBC/Chemistry, flow cytometry and both huHSC and huPMBC humanization studies. Citation Format: Sheryl J. Wildt, Jamie McClellan, Mandy Horn. Development and characterization of the ultra immunodeficient B6;129-Rag2tm1FwaIL2rgtm1Rsky/DwlHsd (R2G2) mouse model [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 2812. doi:10.1158/1538-7445.AM2017-2812
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