TGIF1 splicing variant 8 is overexpressed in oral squamous cell carcinoma and is related to pathologic and clinical behavior

Objective Possible differences in splicing variants of TGIF1 in oral squamous cell carcinoma (OSCC) have not yet been reported. This study analyzed the expression levels of different splicing variants of the TGIF1 gene in OSCC compared with nontumoral epithelium (NT) and the relationship with clinic...

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Published in:Oral surgery, oral medicine, oral pathology and oral radiology oral medicine, oral pathology and oral radiology, 2013-11, Vol.116 (5), p.614-625
Main Authors: Libório, Tatiana Nayara, DDS, PhD, Ferreira, Elisa Napolitano, PhD, Aquino Xavier, Flávia Caló, DDS, PhD, Carraro, Dirce Maria, PhD, Kowalski, Luiz Paulo, MD, PhD, Soares, Fernando Augusto, MD, PhD, Nunes, Fabio Daumas, DDS, PhD
Format: Article
Language:English
Subjects:
Adult
Carcinoma, Squamous Cell - genetics
Carcinoma, Squamous Cell - pathology
Dentistry
Female
Gene Expression Regulation, Neoplastic
Homeodomain Proteins - genetics
Humans
Male
Middle Aged
Mouth Neoplasms - genetics
Mouth Neoplasms - pathology
Neoplasm Staging
Repressor Proteins - genetics
Reverse Transcriptase Polymerase Chain Reaction
Risk Factors
Surgery
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Summary:Objective Possible differences in splicing variants of TGIF1 in oral squamous cell carcinoma (OSCC) have not yet been reported. This study analyzed the expression levels of different splicing variants of the TGIF1 gene in OSCC compared with nontumoral epithelium (NT) and the relationship with clinical-pathologic features of tumors. Study Design Forty-eight frozen samples of OSCC and 17 of NT were analyzed using quantitative reverse transcription polymerase chain reaction. Results TGIF1 v2 and v8 are overexpressed in OSCC, whereas TGIF1 v5 is underexpressed when compared with NT. Low TGIF1 v8 expression was correlated with lower cellular differentiation, positive blood vascular invasion, advanced pathologic stage, and positive vascular lymphatic invasion of OSCC. TGIF1 v8 is also related to overall survival over time, with lower values associated with an increased risk of cancer-related death. Conclusions These data suggest that alternative splicing of TGIF1 is deregulated in OSCC, with overexpression of some splicing variants, especially TGIF1 v8, which is associated with advanced stages of OSCC.
ISSN:2212-4403
2212-4411
DOI:10.1016/j.oooo.2013.07.014