A20, ABIN-1/2, and CARD11 mutations and their prognostic value in gastrointestinal diffuse large B-cell lymphoma

Gehong Dong, Estelle Chanudet, Naiyan Zeng, Alex Appert, Yun Wen Chen, Wing Yan Au, Rifat A. Hamoudi, A. James Watkins, Hongtao Ye, Hongxiang Liu, Zifen Gao, Shih Sung Chuang, Gopesh Srivastava, Ming Qing Du

研究成果: 雜誌貢獻文章同行評審

59 引文 斯高帕斯(Scopus)


Purpose: Diffuse large B-cell lymphoma (DLBCL) is a heterogeneous group of aggressive lymphomas with the activated B-cell-like subtype characterized by constitutive NF-kB activation. Activating mutations of CARD11 and inactivating mutations of A20 are frequent events in DLBCL. However, the full extent of genetic alterations in the NF-κB pathway regulators and their potential prognostic value in DLBCL remain to be investigated. We investigated the genetic abnormalities of CARD11, A20, and ABIN-1/2/3 (the A20 binding inhibitor of NF-κB) and their clinicopathologic correlation in gastrointestinal DLBCL. Experimental Design: The somatic mutation and copy number changes of CARD11, A20, and ABIN-1/ 2/3 were investigated in 71 gastrointestinal DLBCLs by PCR/sequencing, and interphase FISH/array comparative genomic hybridization, respectively. The mutations identified were functionally characterized by NF-κB reporter assays and immunoprecipitation experiments. Results: Recurrent somatic mutations were found in CARD11 (10%), A20 (17%), ABIN-1 (4%), and ABIN-2 (3%), but not in ABIN-3. In comparison with the wild-type, all CARD11 mutants were potent NF-κB activators in vitro. On the basis of the destructive nature of the observed mutations, and the findings by reporter assays and immunoprecipitation studies, most if not all of the somatic mutations that were seen in A20, ABIN-1, and ABIN-2 could impair their normal functions. Among these genetic abnormalities, A20 somatic mutation was significantly associated with both poor overall survival and event-free survival. Conclusions: We show further evidence of NF-kB pathway genetic abnormalities in DLBCL, which are potentially valuable in the prognosis and design of future therapeutic strategies.
頁(從 - 到)1440-1451
期刊Clinical Cancer Research
出版狀態已發佈 - 3月 15 2011

ASJC Scopus subject areas

  • 癌症研究
  • 腫瘤科


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