1. Academic Validation
  2. Knockdown of Oligosaccharyltransferase Subunit Ribophorin 1 Induces Endoplasmic-Reticulum-Stress-Dependent Cell Apoptosis in Breast Cancer

Knockdown of Oligosaccharyltransferase Subunit Ribophorin 1 Induces Endoplasmic-Reticulum-Stress-Dependent Cell Apoptosis in Breast Cancer

  • Front Oncol. 2021 Oct 27;11:722624. doi: 10.3389/fonc.2021.722624.
Jiajun Ding 1 2 Jiahui Xu 1 Qiaodan Deng 1 Wei Ma 1 Rui Zhang 1 Xueyan He 1 Suling Liu 1 Lixing Zhang 1
Affiliations

Affiliations

  • 1 Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Cancer Institutes, Key Laboratory of Breast Cancer in Shanghai, The Shanghai Key Laboratory of Medical Epigenetics, Key Laboratory of Medical Epigenetics and Metabolism, Shanghai Medical College, Fudan University, Shanghai, China.
  • 2 Breast Surgery, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China.
Abstract

Ribophorin 1 (RPN1) is a major part of Oligosaccharyltransferase (OST) complex, which is vital for the N-linked glycosylation. Though it has been verified that the abnormal glycosylation is closely related to the development of breast Cancer, the detail role of RPN1 in breast Cancer remains unknown. In this study, we explored the public databases to investigate the relationship between the expression levels of OST subunits and the prognosis of breast Cancer. Then, we focused on the function of RPN1 in breast Cancer and its potential mechanisms. Our study showed that the expression of several OST subunits including RPN1, RPN2, STT3A STT3B, and DDOST were upregulated in breast Cancer samples. The protein expression level of RPN1 was also upregulated in breast Cancer. Higher expression of RPN1 was correlated with worse clinical features and poorer prognosis. Furthermore, knockdown of RPN1 suppressed the proliferation and invasion of breast Cancer cells in vitro and induced cell Apoptosis triggered by endoplasmic reticulum stress. Our results identified the oncogenic function of RPN1 in breast Cancer, implying that RPN1 might be a potential biomarker and therapeutic target for breast Cancer.

Keywords

apoptosis; breast cancer; endoplasmic reticulum stress; oligosaccharyltransferase complex; ribophorin 1.

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