Overexpression of high mobility group protein B1 correlates with the proliferation and metastasis of lung adenocarcinoma cells

Sun,Ke-Kang; Ji,Cheng; Li,Xing; Zhang,Lu; Deng,Jun; Zhong,Ning; Wu,Xiao-Yang

doi:10.3892/mmr.2013.1362

May 2013 Volume 7 Issue 5

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May 2013 Volume 7 Issue 5

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Article

Overexpression of high mobility group protein B1 correlates with the proliferation and metastasis of lung adenocarcinoma cells

Authors:
- Ke-Kang Sun
- Cheng Ji
- Xing Li
- Lu Zhang
- Jun Deng
- Ning Zhong
- Xiao-Yang Wu
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Affiliations: Department of Gastrointestinal Surgery, Thoracic Surgery Division, Kunshan First People's Hospital Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, P.R. China, Department of Respiratory Medicine, First Affiliated Hospital to Soochow University, Suzhou, Jiangsu 215006, P.R. China
Pages: 1678-1682
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Published online on: March 6, 2013

https://doi.org/10.3892/mmr.2013.1362
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Abstract

High mobility group protein B1 (HMGB1) plays an important role in a number of clinical conditions, such as autoimmunity, cardiovascular disease and cancer. Evidence suggests that HMGB1 is critical in the development and progression of numerous types of tumor. However, the underlying molecular mechanisms for the HMGB1-mediated progression and metastasis of lung cancer have not yet been elucidated. In this study, we investigated the role of HMGB1 in lung adenocarcinoma and the mechanisms by which it contributes to carcinogenesis and metastasis. We demonstrated that there was an increase in the expression of HMGB1 in primary cancer tissues compared to the matched adjacent non-cancerous tissues. The expression levels of TOB1 in the normal human bronchial epithelial (HBE) cell line and 10 lung cancer cell lines were determined by reverse transcription-PCR (RT-PCR). The results revealed that HMGB1 expression increased in 8 cell lines compared with the HBE cell line. The A549 and NCI-H1975 cells were transfected with HMGB1 recombinant plasmid. We discovered that the overexpression of HMGB1 promoted cell growth and metastasis in the 2 cell lines. Further investigation revealed that exogenously expressed HMGB1 enhanced the activation of p38 and Erk1/2, in addition to the expression of nuclear factor (NF)-κB. We propose that HMGB1 functions as a tumor promoter and that it regulates the proliferation and invasion of lung cancer cells by modulating the activation of the Erk1/2 and p38 mitogen-activated protein kinase (MAPK) signaling pathways.

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Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

Overexpression of high mobility group protein B1 correlates with the proliferation and metastasis of lung adenocarcinoma cells

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