Prognostic significance of decreased expression of six large common fragile site genes in oropharyngeal squamous cell carcinomas

Ge Gao, Jan Kasperbauer, Nicole M. Tombers, Melissa D. Cornell, David I Smith

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Common fragile sites (CFSs) are large regions with profound genomic instability that often span extremely large genes a number of which have been found to be important tumor suppressors. RNA sequencing previously revealed that there was a group of six large CFS genes which frequently had decreased expression in oropharyngeal squamous cell carcinomas (OPSCCs) and real-time reverse transcriptase polymerase chain reaction experiments validated that these six large CFS genes (PARK2, DLG2, NBEA, CTNNA3, DMD, and FHIT) had decreased expression in most of the tumor samples. In this study, we investigated whether the decreased expression of these genes has any clinical significance in OPSCCs. We analyzed the six CFS large genes in 45 OPSCC patients and found that 27 (60%) of the OPSCC tumors had decreased expression of these six genes. When we correlated the expression of these six genes to each patient’s clinical records, for 11 patients who had tumor recurrence, 10 of them had decreased expression of almost all 6 genes. When we divided the patients into two groups, one group with decreased expression of the six genes and the other group with either slight changes or increased expression of the six genes, we found that there is significant difference in the incidence of tumor recurrence between these two groups by Kaplan-Meier plot analysis (P <.05). Our results demonstrated that those OPSCC tumors with decreased expression of this select group of six large CFS genes were much more likely to be associated with tumor recurrence and these genes are potential prognostic markers for predicting tumor recurrence in OPSCC. 

Original languageEnglish (US)
Pages (from-to)726-731
Number of pages6
JournalTranslational Oncology
Volume7
Issue number6
DOIs
StatePublished - 2014

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Squamous Cell Carcinoma
Gene Expression
Genes
Neoplasms
Recurrence
RNA Sequence Analysis
Genomic Instability
Kaplan-Meier Estimate
Tumor Biomarkers
Reverse Transcriptase Polymerase Chain Reaction
Real-Time Polymerase Chain Reaction
Incidence

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Prognostic significance of decreased expression of six large common fragile site genes in oropharyngeal squamous cell carcinomas. / Gao, Ge; Kasperbauer, Jan; Tombers, Nicole M.; Cornell, Melissa D.; Smith, David I.

In: Translational Oncology, Vol. 7, No. 6, 2014, p. 726-731.

Research output: Contribution to journalArticle

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abstract = "Common fragile sites (CFSs) are large regions with profound genomic instability that often span extremely large genes a number of which have been found to be important tumor suppressors. RNA sequencing previously revealed that there was a group of six large CFS genes which frequently had decreased expression in oropharyngeal squamous cell carcinomas (OPSCCs) and real-time reverse transcriptase polymerase chain reaction experiments validated that these six large CFS genes (PARK2, DLG2, NBEA, CTNNA3, DMD, and FHIT) had decreased expression in most of the tumor samples. In this study, we investigated whether the decreased expression of these genes has any clinical significance in OPSCCs. We analyzed the six CFS large genes in 45 OPSCC patients and found that 27 (60{\%}) of the OPSCC tumors had decreased expression of these six genes. When we correlated the expression of these six genes to each patient’s clinical records, for 11 patients who had tumor recurrence, 10 of them had decreased expression of almost all 6 genes. When we divided the patients into two groups, one group with decreased expression of the six genes and the other group with either slight changes or increased expression of the six genes, we found that there is significant difference in the incidence of tumor recurrence between these two groups by Kaplan-Meier plot analysis (P <.05). Our results demonstrated that those OPSCC tumors with decreased expression of this select group of six large CFS genes were much more likely to be associated with tumor recurrence and these genes are potential prognostic markers for predicting tumor recurrence in OPSCC. ",
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