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Objective

The enzyme carboxyl ester lipase (CEL), known as bile salt-dependent lipase (BSDL) or bile salt-stimulated lipase (BSSL), is mainly expressed in pancreatic acinar cells and lactating mammary glands. To investigate the link between CEL expression of breast cancer (BC) tissues and the survival of BC patients by analyzing The Cancer Genome Atlas Breast Carcinoma (TCGA-BRCA) level 3 data.

Methods

The clinical information and RNA-sequencing (RNA-Seq) expression data were downloaded from TCGA. Patients were divided into a high CEL expression group and a low CEL expression group using the optimal cutoff value (5.611) identified from the ROC curve. Chi-square test and Fisher exact test were used to find the correlation between the expression of CEL and clinicopathologic features. To assess the diagnostic capability, the receiver operating characteristic (ROC) curve of CEL was drawn. The survival differences between high and low CEL expression groups were compared by Cox regression analysis. Log-rank test was applied to the calculation of p values and the comparison of the Kaplan-Meier curves. Furthermore, Gene Expression Omnibus (GEO) datasets were used for external data validation.

Results

Analysis of 1104 cases of tumor data showed that CEL was over-expressed in breast cancer. There were relationships between high CEL expression and clinicopathologic features. The high CEL expression group had a lower survival. By analyzing the area under the ROC curve (AUC) of CEL, it was found to have a limited diagnostic capability. CEL expression may be an independent prognostic factor for breast cancer survival through the multivariate analysis. The validation in GEO datasets also showed that CEL expression was higher in breast tumor tissues than in normal breast tissues. High CEL expression was associated with the poor overall survival of breast cancer.

Conclusions

High CEL expression may be an independent prognostic factor for the poor survival of breast cancer."xsd:string
http://purl.uniprot.org/citations/31561066http://purl.org/dc/terms/identifier"doi:10.1016/j.cancergen.2019.09.005"xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/author"Jiao Y."xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/author"He M."xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/author"Yang Z."xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/author"Wang K."xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/author"Cui Y."xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/date"2019"xsd:gYear
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/name"Cancer Genet"xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/pages"54-61"xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/title"A new prognostic factor of breast cancer: High carboxyl ester lipase expression related to poor survival."xsd:string
http://purl.uniprot.org/citations/31561066http://purl.uniprot.org/core/volume"239"xsd:string
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