Genomic and metabolic characterization of a chromophobe renal cell carcinoma cell line model (UOK276)

This study characterizes a novel ChRCC‐derived cell line model, UOK276. A large ChRCC tumor with regions of sarcomatoid differentiation was used to establish a spontaneously immortal cell line, UOK276. UOK276 was evaluated for chromosomal, mutational and metabolic aberrations. The UOK276 cell line is hyper‐diploid with a modal number of 49 chromosomes per cell, and evidence of copy‐neutral loss of heterozygosity, as opposed to the classic pattern of ChRCC chromosomal losses. UOK276 demonstrated a TP53 missense mutation, expressed mutant TP53 protein, and responded to treatment with a small molecule therapeutic agent, NSC319726, designed to reactivate mutated TP53. Xenograft tumors grew in nude mice and provide an in vivo animal model for the investigation of potential therapeutic regimes. The xenograft pathology and genetic analysis suggested UOK276 was derived from the sarcomatoid region of the original tumor. In summary, UOK276 represents a novel in vitro and in vivo cell line model for aggressive, sarcomatoid‐differentiated, TP53 mutant ChRCC. This pre‐clinical model system could be used to investigate the novel biology of aggressive, sarcomatoid ChRCC and evaluate new therapeutic regimes. This article is protected by copyright. All rights reserved.
Source: Genes, Chromosomes and Cancer - Category: Cancer & Oncology Authors: Tags: Research Article Source Type: research