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• W2803265552 abstract "Xenografts derived from engrafting fresh surgical specimens directly onto immunodeficient mice have enabled the development of more relevant in vivo models for human cancers. Such patient-derived xenograft (PDX) models retain similar morphology, heterogeneities, and molecular signatures with the original cancers. We reported the rapid and efficient establishment of PDXs using super-immunodeficient NOG mice (PDX/NOG models). During the establishment process, a transplantable lymphoproliferative lesion (LPL) that replaces the original tumor cells sometimes occurs. The occurrence of LPL is the most problematic aspect of the establishment of PDX. This phenomenon may arise because of the Epstein-Barr virus due to the severely immunodeficient nature of the animal model; however, the mechanisms underlying LPL have not yet been elucidated in detail. In the present study, we histologically analyzed and tried to prevent the occurrence of LPL in PDX/NOG. Over 100 lines of cancer xenografts were established in our previous studies. Throughout these processes, we also established 10 LPL-PDX lines. Some LPL-PDX lines consist of B cells, T cells, and differentiated plasma cells. These LPL lymphocytes exhibited negligible proliferative potency in vitro. The invasions of LPL in the liver, lung, and pancreas were observed immunohistochemically. NOG mice bearing LPL-PDX (LPL-PDX/NOG) were treated with the anti-graft-versus-host-disease (anti-GVHD) drugs FK506 (1.0 mg/kg/day) and mycophenolate mofetil (MMF, 120 mg/kg/day) for 4 weeks using intraperitoneal injections. The LPL proliferations were significantly suppressed with FK506 (p=0.011) and MMF (p=0.014) compared with the control. The occurrence of LPL during establishment of PDX may be based on the GVHD-like mechanism. This phenomenon can be prevented by using anti-GVHD agents in the severely immunodeficient mice. The LPL-PDX/NOG models are also proposed for the utilization of GVHD mouse models with organic damage, particularly chronic GVHD mouse models. Citation Format: Tsuyoshi Chijiwa, Akira Noguchi, Daisuke Komura, Makoto Katayama, Mizuha Haraguchi, Haruo Hashimoto, Hiroshi Suemizu, Yoshiyasu Nakamura, Daisuke Furukawa, Takayuki Isagawa, Hiroto Katoh, Takashi Moriya, Shumpei Ishikawa, Masato Nakamura, Yohei Miyagi. The prevention of lymphoproliferative lesions arising in patient-derived cancer xenografts by anti-graft-versus-host-disease agents [abstract]. In: Proceedings of the AACR Special Conference: Advances in Modeling Cancer in Mice: Technology, Biology, and Beyond; 2017 Sep 24-27; Orlando, Florida. Philadelphia (PA): AACR; Cancer Res 2018;78(10 Suppl):Abstract nr B13." @default.
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• W2803265552 date "2018-05-14" @default.
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• W2803265552 title "Abstract B13: The prevention of lymphoproliferative lesions arising in patient-derived cancer xenografts by anti-graft-versus-host-disease agents" @default.
• W2803265552 doi "https://doi.org/10.1158/1538-7445.mousemodels17-b13" @default.
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