Development and Radiation Response Assessment in A Novel Syngeneic Mouse Model of Tongue Cancer: 2D Culture, 3D Organoids and Orthotopic Allografts.

Cancers
Vui King Vincent-Chong, Mukund Seshadri

Abstract

Oral squamous cell carcinoma (OSCC) are aggressive cancers that contribute to significant morbidity and mortality in humans. Although numerous human xenograft models of OSCC have been developed, only a few syngeneic models of OSCC exist. Here, we report on a novel murine model of OSCC, RP-MOC1, derived from a tongue tumor in a C57Bl/6 mouse exposed to the carcinogen 4-nitroquinoline-1-oxide. Phenotypic characterization and credentialing (STR profiling, exome sequencing) of RP-MOC1 cells was performed in vitro. Radiosensitivity was evaluated in 2D culture, 3D organoids, and in vivo using orthotopic allografts. RP-MOC1 cells exhibited a stable epithelial phenotype with proliferative, migratory and invasive properties. Exome sequencing identified several mutations commonly found in OSCC patients. The LD50 for RP-MOC1 cells in 2D culture and 3D organoids was found to be 2.4 Gy and 12.6 Gy, respectively. Orthotopic RP-MOC1 tumors were pan-cytokeratin+ and Ki-67+. Magnetic resonance imaging of orthotopic RP-MOC1 tumors established in immunocompetent mice revealed marked growth inhibition following 10 Gy and 15 Gy fractionated radiation regimens. This radiation response was completely abolished in tumors established in immunodeficient...Continue Reading

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Citations

Apr 4, 2021·Cancers·Karl T Butterworth, Jacqueline P Williams
May 1, 2021·Journal of Fungi·Gianluca IngrossoTeresa Zelante

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Methods Mentioned

BETA
xenograft
flow cytometry
PCR
exome sequencing
FCS
scraping
Assay
X-ray
NMR

Software Mentioned

FCS Express
GATK
GSEA
GraphPad
cellSens Standard
Gene Set Enrichment Analysis ( GSEA )
NIH Image J

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