Genomics

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Genetic Basis of Hepatosplenic T Cell Lymphoma (HSTL)


ABSTRACT: Hepatosplenic T cell lymphoma (HSTL) is a rare and lethal lymphoma; the genetic drivers of this disease are unknown.  Through whole exome sequencing of 68 HSTLs, we define recurrently mutated driver genes and copy number alterations in the disease. Chromatin modifying genes including SETD2, INO80 and ARID1B were commonly mutated in HSTL, affecting 62% of cases. HSTLs manifest frequent mutations in STAT5B (31%), STAT3 (9%), and PIK3CD (9%) for which there currently exist potential targeted therapies. In addition, we noted less frequent events in EZH2, KRAS and TP53. SETD2 was the most frequently silenced gene in HSTL. We experimentally demonstrated that SETD2 acts as a tumor suppressor gene. In addition, we found that mutations in STAT5B and PIK3CD activate critical signaling pathways important to cell survival in HSTL. Our work thus defines the genetic landscape of HSTL and implicates novel gene mutations linked to HSTL pathogenesis and potential treatment targets.

PROVIDER: EGAS00001002182 | EGA |

REPOSITORIES: EGA

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Publications

The Genetic Basis of Hepatosplenic T-cell Lymphoma.

McKinney Matthew M   Moffitt Andrea B AB   Gaulard Philippe P   Travert Marion M   De Leval Laurence L   Nicolae Alina A   Raffeld Mark M   Jaffe Elaine S ES   Pittaluga Stefania S   Xi Liqiang L   Heavican Tayla T   Iqbal Javeed J   Belhadj Karim K   Delfau-Larue Marie Helene MH   Fataccioli Virginie V   Czader Magdalena B MB   Lossos Izidore S IS   Chapman-Fredricks Jennifer R JR   Richards Kristy L KL   Fedoriw Yuri Y   Ondrejka Sarah L SL   Hsi Eric D ED   Low Lawrence L   Weisenburger Dennis D   Chan Wing C WC   Mehta-Shah Neha N   Horwitz Steven S   Bernal-Mizrachi Leon L   Flowers Christopher R CR   Beaven Anne W AW   Parihar Mayur M   Baseggio Lucile L   Parrens Marie M   Moreau Anne A   Sujobert Pierre P   Pilichowska Monika M   Evens Andrew M AM   Chadburn Amy A   Au-Yeung Rex K H RK   Srivastava Gopesh G   Choi William W L WW   Goodlad John R JR   Aurer Igor I   Basic-Kinda Sandra S   Gascoyne Randy D RD   Davis Nicholas S NS   Li Guojie G   Zhang Jenny J   Rajagopalan Deepthi D   Reddy Anupama A   Love Cassandra C   Levy Shawn S   Zhuang Yuan Y   Datta Jyotishka J   Dunson David B DB   Davé Sandeep S SS  

Cancer discovery 20170125 4


Hepatosplenic T-cell lymphoma (HSTL) is a rare and lethal lymphoma; the genetic drivers of this disease are unknown. Through whole-exome sequencing of 68 HSTLs, we define recurrently mutated driver genes and copy-number alterations in the disease. Chromatin-modifying genes, including <i>SETD2, INO80</i>, and <i>ARID1B</i>, were commonly mutated in HSTL, affecting 62% of cases. HSTLs manifest frequent mutations in <i>STAT5B</i> (31%), <i>STAT3</i> (9%), and <i>PIK3CD</i> (9%), for which there cur  ...[more]

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