Comprehensive assessment of the expression of the SWI/SNF complex defines two distinct prognostic subtypes of ovarian clear cell carcinoma

被引:17
|
作者
Abou-Taleb, Hisham [1 ,2 ]
Yamaguchi, Ken [1 ]
Matsumura, Noriomi [1 ]
Murakami, Ryusuke [1 ]
Nakai, Hidekatsu [3 ]
Higasa, Koichiro [4 ]
Amano, Yasuaki [1 ]
Abiko, Kaoru [1 ]
Yoshioka, Yumiko [1 ]
Hamanishi, Junzo [1 ]
Koshiyama, Masafumi [1 ]
Baba, Tsukasa [1 ]
Yamada, Ryo [4 ]
Matsuda, Fumihiko [4 ]
Konishi, Ikuo [1 ]
Mandai, Masaki [3 ]
机构
[1] Kyoto Univ, Grad Sch Med, Dept Gynecol & Obstet, Kyoto, Japan
[2] Assiut Univ, Dept Obstet & Gynecol, Fac Med, Assiut, Egypt
[3] Kinki Univ, Dept Obstet & Gynecol, Fac Med, Osaka, Japan
[4] Kyoto Univ, Grad Sch Med, Ctr Genom Med, Kyoto, Japan
基金
日本学术振兴会;
关键词
clear cell carcinoma; ovarian cancer; SWI/SNF complex; copy number variation; COPY-NUMBER ALTERATION; HUMAN CANCERS; TUMOR-SUPPRESSOR; POOR-PROGNOSIS; ARID1A; MUTATIONS; ADENOCARCINOMA; AMPLIFICATION; PROGRESSION; TARGETS;
D O I
10.18632/oncotarget.10181
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Somatic mutations in the ARID1A tumor-suppressor gene have been frequently identified in ovarian clear cell carcinoma (CCC) cases. BAF250a encoded by ARID1A is a member of the SWI/SNF complex, but the expression and mutation status of other SWI/SNF subunits have not been explored. The current study aimed to elucidate the biological and clinical significance of the SWI/SNF complex subunits, by assessing the expression and mutation status of SWI/SNF subunits, and distinct genomic aberrations associated with their expression. Of 82 CCC specimens, 38 samples presented no BAF250a expression, and 50 samples exhibited the loss of at least one subunit of the SWI/SNF complex. Cases which lack at least one SWI/SNF complex component exhibited significantly more advanced stages, faster growth and stronger nuclear atypia compared with SWI/SNF-positive samples (p< 0.05). Although BAF250a expression is not related to poor prognosis, the group presenting the loss of at least one SWI/SNF complex subunit exhibited significantly shorter overall and progression-free survivals (p< 0.05). A multivariate analysis suggested that the expression status of the SWI/SNF complex serves as an independent prognostic factor (p< 0.005). The cases positive for all SWI/SNF subunits demonstrated significantly greater DNA copy number alterations, such as amplification at chromosomes 8q.24.3 and 20q.13.2-20q.13.33 (including ZNF217) and deletion at chromosomes 13q12.11-13q14.3 (including RB1), 17p13.2-17p13.1 (including TP53) and 19p13.2-19p13.12. In conclusion, the CCCs exhibiting the loss of one or multiple SWI/SNF complex subunits demonstrated aggressive behaviors and poor prognosis, whereas the CCCs with positive expression for all SWI/SNF components presented more copy number alterations and a favorable prognosis.
引用
收藏
页码:54758 / 54770
页数:13
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