Implications of Bit1 and AIF overexpressions in esophageal squamous cell carcinoma.

Abstract

Overwhelming evidence has demonstrated that Bit1 and AIF as mitochondrial proteins are implicated in the development and progression of a variety of tumors. However, their expressions and biological functions in esophageal squamous cell carcinoma (ESCC) remain to be delineated. In the present study, we found that Bit1, AIF, and Bcl-2 levels in ESCC tissues were significantly higher than those in normal esophageal epithelial tissues and dysplasia tissues (P < 0.05). Stepwise investigation demonstrated that Bit1 and Bcl-2 levels were both tightly associated with lymphatic metastasis and TNM staging (P < 0.05), and the levels of Bit1 mRNA as well as AIF and Bcl-2 proteins were both closely related to tumor differentiation (P < 0.05), but not related to the patients' age and gender (P > 0.05). Importantly, Bit1 mRNA and protein levels in ESCC with lymphatic metastasis and TNM staging in III and IV were markedly higher than that without lymphatic metastasis and TMN staging in I and II. Further analysis showed that expression of Bit1 protein was both positively correlated with expressions of AIF and Bcl-2 proteins (r = 0.408 and 0.405, respectively; P < 0.05). Correctively, our data cited earlier suggest that Bit1 plays pivotal roles in the development and progression of ESCC, and its biological functions in ESCC may be closely associated with AIF and Bcl-2 levels.

• Authors: Tianli Fan, Fang Tian, Shanyong Yi, Yang Ke, Shengna Han, Lirong Zhang, Hongtao Liu
• Journal: Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine (Tumour Biol) Vol. 35 Issue 1 Pg. 519-27 (Jan 2014) ISSN: 1423-0380 [Electronic] Netherlands
• PMID: 23955799 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Apoptosis Inducing Factor
• Mitochondrial Proteins
• Proto-Oncogene Proteins c-bcl-2
• RNA, Messenger
• Carboxylic Ester Hydrolases
• PTH2 protein, human

Topics

• Adult
• Aged
• Apoptosis Inducing Factor (genetics, metabolism)
• Carboxylic Ester Hydrolases (genetics, metabolism)
• Carcinoma, Squamous Cell (genetics, metabolism, pathology)
• Esophageal Neoplasms (genetics, metabolism, pathology)
• Esophageal Squamous Cell Carcinoma
• Female
• Gene Expression
• Humans
• Immunohistochemistry
• Male
• Middle Aged
• Mitochondrial Proteins (genetics, metabolism)
• Neoplasm Metastasis
• Neoplasm Staging
• Proto-Oncogene Proteins c-bcl-2 (genetics, metabolism)
• RNA, Messenger (genetics, metabolism)