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Knockdown of endothelin receptor B inhibits the progression of triple‐negative breast cancer
Author(s) -
Gu Xi,
Han Shuai,
Cui Meizi,
Xue Jinqi,
Ai Liping,
Sun Lisha,
Zhu Xudong,
Wang Yulun,
Liu Caigang
Publication year - 2019
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/nyas.14039
Subject(s) - cancer research , triple negative breast cancer , breast cancer , gene silencing , gene knockdown , metastasis , cancer , downregulation and upregulation , epithelial–mesenchymal transition , biology , carcinogenesis , medicine , apoptosis , biochemistry , gene
Endothelin receptor B (EDNRB) is one of the receptors in the endothelin axis and its upregulated expression is associated with tumorigenesis and metastasis of several types of solid tumors. However, the expression profile of EDNRB in breast cancer and its role in the progression of breast cancer are unclear. Here, we show that EDNRB expression is higher in metastatic tumors than in primary breast cancer, and is associated significantly with lymph node metastasis and poor survival in Chinese patients with breast cancer. EDNRB expression was particularly upregulated in triple‐negative breast cancer (TNBC) cells. Moreover, EDNRB silencing by a specific shRNA significantly attenuated the proliferation, migration, and invasiveness of MDA‐MB‐231 and BT549 cells and increased their apoptosis, as well as retarded the growth of implanted tumors in mice. Tandem mass spectrometry analysis indicated that 248 proteins were differentially expressed in EDNRB ‐silenced cells and their cellular organelles, and these proteins participate in many processes. EDNRB silencing decreased protein kinase B and extracellular regulated protein kinase phosphorylation and promoted the mesenchymal‐to‐epithelial transition process in MDA‐MB‐231 cells. Therefore, our findings provide strong evidence for the first time that knockdown of EDNRB expression inhibits the progression of TNBC and that EDNRB can serve as a prognostic biomarker and therapeutic target for the treatment of TNBC.