Abstract:
:Our laboratory pioneered patient-derived orthotopic xenograft (PDOX) mouse models using surgical orthotopic implantation (SOI). PDOX models are patient-like, in contrast to the ectopic subcutaneous-transplant cancer models. In the present study, we demonstrate that an undifferentiated pleomorphic soft-tissue sarcoma (UPS-STS) PDOX model acquired bright RFP-expressing stroma through one passage in red fluorescent protein (RFP) transgenic mice, which upon passage to non-colored nude mice was non-invasively imageable. A PDOX nude mouse model of UPS-STS was established in the biceps femoris of nude mice. After the tumors grew to a diameter of 10 mm, the tumors were subsequently passaged to RFP transgenic mice, and after tumor growth were then passaged to non-transgenic nude mice. Tumors were divided into small fragments and transplanted in the biceps femoris at each passage. The OV100 Small Animal Fluorescence Imaging System and FV1000 laser scanning confocal microscope were used to image RFP fluorescence in the UPS-STS PDOX models. UPS-STS PDOX tumors, previously grown in RFP transgenic nude mice for only one passage, had very bright fluorescence and after passage to non-transgenic nude mice maintained the bright fluorescence and were non-invasively imageable. FV1000 confocal imaging revealed diffusely distributed bright RFP stromal cells in the PDOX tumor, both in RFP transgenic mice and after passage to non-transgenic mice. These results demonstrate a powerful method to make the PDOX UPS-STS model brightly fluorescent for non-invasive imaging, as well as for confocal microscopy of individual stromal cells associated with the tumor. The RFP-labeled UPS PDOX has the potential to rapidly screen for novel effective agents for individual patients, including stroma-targeting drugs, whereby the stromal cells are a visual target. J. Cell. Biochem. 118: 361-365, 2017. © 2016 Wiley Periodicals, Inc.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Kiyuna T,Murakami T,Tome Y,Igarashi K,Kawaguchi K,Russell T,Eckardt MA,Crompton J,Singh A,Bernthal N,Bukata S,Federman N,Kanaya F,Eilber FC,Hoffman RMdoi
10.1002/jcb.25643subject
Has Abstractpub_date
2017-02-01 00:00:00pages
361-365issue
2eissn
0730-2312issn
1097-4644journal_volume
118pub_type
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