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Integrated Molecular Characterization of Testicular Germ Cell Tumors.


ABSTRACT: We studied 137 primary testicular germ cell tumors (TGCTs) using high-dimensional assays of genomic, epigenomic, transcriptomic, and proteomic features. These tumors exhibited high aneuploidy and a paucity of somatic mutations. Somatic mutation of only three genes achieved significance-KIT, KRAS, and NRAS-exclusively in samples with seminoma components. Integrated analyses identified distinct molecular patterns that characterized the major recognized histologic subtypes of TGCT: seminoma, embryonal carcinoma, yolk sac tumor, and teratoma. Striking differences in global DNA methylation and microRNA expression between histology subtypes highlight a likely role of epigenomic processes in determining histologic fates in TGCTs. We also identified a subset of pure seminomas defined by KIT mutations, increased immune infiltration, globally demethylated DNA, and decreased KRAS copy number. We report potential biomarkers for risk stratification, such as miRNA specifically expressed in teratoma, and others with molecular diagnostic potential, such as CpH (CpA/CpC/CpT) methylation identifying embryonal carcinomas.

SUBMITTER: Shen H 

PROVIDER: S-EPMC6075738 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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Integrated Molecular Characterization of Testicular Germ Cell Tumors.

Shen Hui H   Shih Juliann J   Hollern Daniel P DP   Wang Linghua L   Bowlby Reanne R   Tickoo Satish K SK   Thorsson Vésteinn V   Mungall Andrew J AJ   Newton Yulia Y   Hegde Apurva M AM   Armenia Joshua J   Sánchez-Vega Francisco F   Pluta John J   Pyle Louise C LC   Mehra Rohit R   Reuter Victor E VE   Godoy Guilherme G   Jones Jeffrey J   Shelley Carl S CS   Feldman Darren R DR   Vidal Daniel O DO   Lessel Davor D   Kulis Tomislav T   Cárcano Flavio M FM   Leraas Kristen M KM   Lichtenberg Tara M TM   Brooks Denise D   Cherniack Andrew D AD   Cho Juok J   Heiman David I DI   Kasaian Katayoon K   Liu Minwei M   Noble Michael S MS   Xi Liu L   Zhang Hailei H   Zhou Wanding W   ZenKlusen Jean C JC   Hutter Carolyn M CM   Felau Ina I   Zhang Jiashan J   Schultz Nikolaus N   Getz Gad G   Meyerson Matthew M   Stuart Joshua M JM   Akbani Rehan R   Wheeler David A DA   Laird Peter W PW   Nathanson Katherine L KL   Cortessis Victoria K VK   Hoadley Katherine A KA  

Cell reports 20180601 11


We studied 137 primary testicular germ cell tumors (TGCTs) using high-dimensional assays of genomic, epigenomic, transcriptomic, and proteomic features. These tumors exhibited high aneuploidy and a paucity of somatic mutations. Somatic mutation of only three genes achieved significance-KIT, KRAS, and NRAS-exclusively in samples with seminoma components. Integrated analyses identified distinct molecular patterns that characterized the major recognized histologic subtypes of TGCT: seminoma, embryo  ...[more]

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