Abstract：
BACKGROUND:Uterine leiomyosarcoma (ULMS) is an aggressive form of soft tissue tumors. The molecular heterogeneity and pathogenesis of ULMS are not well understood. METHODS:Expression profiling data were used to determine the possibility and optimal number of ULMS molecular subtypes. Next, clinicopathological characters and molecular pathways were analyzed in each subtype to prospect the clinical applications and progression mechanisms of ULMS. RESULTS:Two distinct molecular subtypes of ULMS were defined based on different gene expression signatures. Subtype I ULMS recapitulated low-grade ULMS, the gene expression pattern of which resembled normal smooth muscle cells, characterized by overexpression of smooth muscle function genes such as LMOD1, SLMAP, MYLK, MYH11. In contrast, subtype II ULMS recapitulated high-grade ULMS with higher tumor weight and invasion rate, and was characterized by overexpression of genes involved in the pathway of epithelial to mesenchymal transition and tumorigenesis, such as CDK6, MAPK13 and HOXA1. CONCLUSIONS:We identified two distinct molecular subtypes of ULMS responding differently to chemotherapy treatment. Our findings provide a better understanding of ULMS intrinsic molecular subtypes, and will potentially facilitate the development of subtype-specific diagnosis biomarkers and therapy strategies for these tumors.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
An Y,Wang S,Li S,Zhang L,Wang D,Wang H,Zhu S,Zhu W,Li Y,Chen W,Ji S,Guo Xdoi
10.1186/s12885-017-3568-ysubject
Has Abstractpub_date
2017-09-11 00:00:00pages
639issue
1issn
1471-2407pii
10.1186/s12885-017-3568-yjournal_volume
17pub_type
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