Bax inhibitor-1 is overexpressed in non-small cell lung cancer and promotes its progression and metastasis.
- 1 February 2015
- journal article
- Vol. 8 (2), 1411-8
Abstract
Bax inhibitor-1 (BI-1) is a novel anti-apoptotic protein. While the effect of BI-1 on apoptosis has been extensively studied, less is known about how BI-1 is related to oncogenesis and the progression, particularly, the invasion and metastasis of cancer. In this study, we investigated the expression and function of BI-1 in human non-small cell lung cancer (NSCLC). RT-PCR and immunohistochemistry were performed on clinical NSCLC samples to detect BI-1 expression. Northern blot and Western blot analysis were performed to detect BI-1 expression of in NSCLC cell lines. Cell proliferation and apoptosis were analyzed by flow cytometry. Our results showed that the overexpression of BI-1 was significantly related to oncogenesis of NSCLC (P < 0.05). Meanwhile, we identified a novel 5'end from normal lung-derived BI-1 transcript, different from any transcript deposit in the Genbank, but we detected no mutations in the coding sequence and the promoter region of BI-1 and no abnormal splicing of the alternative first exon. Ectopic expression of BI-1 changed the proliferation and apoptosis of AGZY83-a and Anip973 cells. In conclusion, BI-1 is overexpressed in NSCLC and promotes the progression and metastasis of NSCLC.Keywords
This publication has 15 references indexed in Scilit:
- Bad and Bid – potential background players in preneoplastic to neoplastic shift in human endometriumNeoplasma, 2014
- Bax Inhibitor 1 in apoptosis and diseaseOncogene, 2011
- Bax Inhibitor-1 Is Overexpressed in Prostate Cancer and Its Specific Down-Regulation by RNA Interference Leads to Cell Death in Human Prostate Carcinoma CellsThe American Journal of Pathology, 2003
- Gene expression profiling predicts clinical outcome of breast cancerNature, 2002
- Analysis of the antibody repertoire of astrocytoma patients against antigens expressed by gliomasInternational Journal of Cancer, 2001
- The Bax Inhibitor-1 Gene Is Differentially Regulated in Adult Testis and Developing Lung by Two Alternative TATA-less PromotersGenomics, 1999
- Apoptosis and metastasis: increased apoptosis resistance of metastatic cancer cells is associated with the profound deficiency of apoptosis execution mechanismsCancer Letters, 1997
- Identification of a Novel Conserved Human Gene, TEGTGenomics, 1995
- Tumor suppressor p53 is a direct transcriptional activator of the human bax geneCell, 1995
- Bcl-2 heterodimerizes in vivo with a conserved homolog, Bax, that accelerates programed cell deathCell, 1993