The Long Non-coding RNA HOTAIR Affects the Radiosensitivity of Pancreatic Ductal Adenocarcinoma by Regulating the Expression of Wnt Inhibitory Factor 1

Overview

Journal Tumour Biol

Publisher Sage Publications

Specialty Oncology

Date 2015 Oct 21

PMID 26482614

Citations 35

Authors

Yanhui Jiang

Zhihua Li

Shangyou Zheng

Huimou Chen

Xiaohui Zhao

Wenchao Gao

Zhuofei Bi

Kaiyun You

Yingxue Wang

Wenzhu Li

Liting Li

Yimin Liu

Rufu Chen

Affiliations

Soon will be listed here.

Abstract

Pancreatic ductal adenocarcinoma (PDAC) is seriously resistant to radiotherapy and the mechanism is largely unknown. HOX transcript antisense intergenic RNA (HOTAIR) is overexpressed in PDAC. However, the function of HOTAIR has never been related to the radiosensitivity of PDAC. In this present study, the expression of HOTAIR in the PDAC cell lines and tissues was measured by quantitative real-time PCR (qRT-PCR), and the association between HOTAIR expression levels and X-ray treatment in PDAC cell lines was investigated. Additionally, the influence of HOTAIR knockdown on radiosensitivity, proliferation, and apoptosis of PDAC cells after radiation was evaluated by colony formation assays, Cell Counting Kit-8 (CCK-8) assays, and flow cytometry, respectively. Furthermore, the correlation between HOTAIR and Wnt inhibitory factor 1 (WIF-1) expression in PDAC cell lines and tissues was studied to assess the role of HOTAIR and WIF-1 in the radiosensitivity of PDAC. The results confirmed that HOTAIR expression was significantly increased in the PDAC cell lines and tissues (n = 90) compared with human normal pancreatic ductal epithelial cell line (HPDE) and matched adjacent normal tissues (n = 90). Functionally, HOTAIR knockdown enhanced the radiosensitivity of PDAC cells, reduced the proliferation, and increased the apoptosis of cells after radiation. And HOTAIR silencing increased the expression of WIF-1. Furthermore, the overexpression of WIF-1 revealed that HOTAIR modulated the radiosensitivity of PDAC cells by regulating the expression of WIF-1. These data reveals that HOTAIR can affect the radiosensitivity of PDAC cells partly via regulating the expression of WIF-1, and HOTAIR-WIF-1 axis is a potential target for PDAC radiotherapy.

Citing Articles

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