Reciprocal regulation of BMF and BIRC5 (Survivin) linked to Eomes overexpression in colorectal cancer.
Cancer Lett
; 381(2): 341-8, 2016 10 28.
Article
in En
| MEDLINE
| ID: mdl-27539959
ABSTRACT
Eomesodermin (Eomes) is a T-box transcription factor that has been implicated in the etiology of colorectal cancer and other human malignancies. We screened a panel of human primary colon cancers and patient-matched controls (n = 30) and detected Eomes overexpression at the mRNA and protein level. Similar results were obtained in a panel of rat colon tumors and adjacent normal-looking colonic mucosa (n = 24). In human colon cancer cells, forced overexpression of Eomes enhanced cell viability and protected against staurosporine-induced apoptosis. On the other hand, knocking down Eomes resulted in reduced cell viability, G2/M cell cycle arrest, and apoptosis induction. The apoptotic mechanism centered on the reciprocal downregulation of anti-apoptotic BIRC5 (Survivin) and upregulation of proapoptotic Bcl-2 modifying factor (BMF). In patients with colorectal cancer, high EOMES expression (n = 95) was associated with poor overall survival compared with individuals exhibiting low EOMES levels (n = 80). We conclude from the current investigation, and prior literature, that Eomes has a divergent role in cancer development, with evidence for tumor suppressor and oncogenic functions, depending on stage and tissue context. Further studies are warranted on the apoptotic mechanisms linked to the reciprocal regulation of BMF and BIRC5 in human colorectal cancers characterized by Eomes overexpression.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Adenocarcinoma
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Colonic Neoplasms
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T-Box Domain Proteins
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Adaptor Proteins, Signal Transducing
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Inhibitor of Apoptosis Proteins
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Microtubule-Associated Proteins
Limits:
Animals
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Humans
/
Male
Language:
En
Journal:
Cancer Lett
Year:
2016
Document type:
Article
Affiliation country:
Estados Unidos