Knockdown of TRB3 induces apoptosis in human lung adenocarcinoma cells through regulation of Notch 1 expression

Zhou,Hui; Luo,Yi; Chen,Jian-Hua; Hu,Jun; Luo,Yong‑Zhong; Wang,Wei; Zeng,Yong; Xiao,Ling

doi:10.3892/mmr.2013.1453

Knockdown of TRB3 induces apoptosis in human lung adenocarcinoma cells through regulation of Notch 1 expression

Authors:
- Hui Zhou
- Yi Luo
- Jian-Hua Chen
- Jun Hu
- Yong‑Zhong Luo
- Wei Wang
- Yong Zeng
- Ling Xiao
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Affiliations: Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, P.R. China, Department of Histology and Embryology of School of Basic Medical Sciences, Central South University, Changsha, Hunan 410013, P.R. China
Published online on: April 30, 2013 https://doi.org/10.3892/mmr.2013.1453
Pages: 47-52

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Abstract

The upregulation of tribbles homolog 3 (TRB3), a pseudokinase in mammals, has been observed in several types of malignant cancer, including thyroid, ovarian, liver and colorectal cancer. However, the pathological role and the regulatory mechanism of TRB3 in cancer remain unknown. In the current study, we demonstrated that the expression of TRB3 was upregulated in non-small cell lung cancer (NSCLC), correlating with tumor metastasis, disease recurrence and poor survival in patients. Knocking down TRB3 in aggressive lung cancer cell lines was demonstrated to significantly inhibit their malignant behaviors, including in vitro invasion and cell proliferation, as well as in vivo metastasis and tumor growth. The correlation between TRB3 and Notch 1 expression revealed that Notch 1 was downregulated by the knockdown of TRB3 in the lung adenocarcinoma cell lines. These results have provided insights into the correlation between TRB3 expression and lung cancer progression, and thus may have potential for the prognosis and therapy of lung cancer.

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