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However, its somatic mutations and aberrant methylation in esophageal squamous cell carcinomas (ESCCs) have not been fully analyzed. In this study, we aimed to clarify in ESCC, what components of the SWI/SNF complex have somatic mutations and aberrant methylation, and when somatic mutations of the SWI/SNF complex occur. Deep sequencing of components of the SWI/SNF complex using a bench-top next Generation sequencer revealed that eight of 92 ESCCs (8.7%) had 11 somatic mutations of 7 genes, ARID1A, ARID2, ATRX, PBRM1, SMARCA4, SMARCAL1, and SMARCC1. The\u003cbr/\u003eSMARCA4 mutations were located in the Forkhead (85Ser\u003eLeu) and SNF2 family\u003cbr/\u003eN-terminal (882Glu\u003eLys) domains. The PBRM1 mutations were located in a bromodomain\u003cbr/\u003e(80Asn\u003eSer) and an HMG-box domain (1,377Glu\u003eLys). For most mutations, their Mutant allele frequency was 31-77% (mean 61%) of the fraction of cancer cells in the same samples, indicating that most of the cancer cells in individual ESCC samples had the SWI/SNF mutations on one allele, when present. In addition, a BeadChip array Analysis revealed that a component of the SWI/SNF complex, ACTL6B, had aberrant methylation at its promoter CpG island in 18 of 52 ESCCs (34.6%). These results showed that genetic and epigenetic alterations of the SWI/SNF complex are present in ESCCs, and suggested that genetic alterations are induced at an early stage of esophageal squamous cell carcinogenesis.", "subitem_description_type": "Other"}, {"subitem_description": "\u5b66\u4f4d\u8ad6\u6587", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "en", "subitem_1522300316516": "University of the Ryukyus"}, {"subitem_1522300295150": "ja", "subitem_1522300316516": "\u7409\u7403\u5927\u5b66"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "eng"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/36588"}]}, "item_1617187087799": {"attribute_name": "Dissertation Number", "attribute_value_mlt": 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