Abstract
Upper tract urothelial carcinoma (UTUC) is characterized by a distinctly aggressive clinical phenotype. To define the biological features driving this phenotype, we performed an integrated analysis of whole-exome and RNA sequencing of UTUC. Here we report several key insights from our molecular dissection of this disease: 1) Most UTUCs are luminal-papillary; 2) UTUC has a T-cell depleted immune contexture; 3) High FGFR3 expression is enriched in UTUC and correlates with its T-cell depleted immune microenvironment; 4) Sporadic UTUC is characterized by a lower total mutational burden than urothelial carcinoma of the bladder. Our findings lay the foundation for a deeper understanding of UTUC biology and provide a rationale for the development of UTUC-specific treatment strategies.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Aged
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Aged, 80 and over
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Carcinoma, Transitional Cell / genetics
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Carcinoma, Transitional Cell / immunology
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Carcinoma, Transitional Cell / pathology*
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DNA Mutational Analysis
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Down-Regulation
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Exome Sequencing
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Female
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Gene Expression Profiling
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Gene Expression Regulation, Neoplastic
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Humans
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Kidney Neoplasms / genetics
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Kidney Neoplasms / immunology
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Kidney Neoplasms / pathology*
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Male
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Microsatellite Instability
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Middle Aged
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Mutation
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Receptor, Fibroblast Growth Factor, Type 3 / genetics
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Receptor, Fibroblast Growth Factor, Type 3 / metabolism*
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Sequence Analysis, RNA
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Signal Transduction / genetics
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T-Lymphocytes / immunology*
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Tumor Microenvironment / immunology
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Ureteral Neoplasms / genetics
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Ureteral Neoplasms / immunology
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Ureteral Neoplasms / pathology*
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Urothelium / pathology
Substances
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FGFR3 protein, human
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Receptor, Fibroblast Growth Factor, Type 3