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. 2014 Aug 9:14:37.
doi: 10.1186/1472-6890-14-37. eCollection 2014.

P53 nuclear stabilization is associated with FHIT loss and younger age of onset in squamous cell carcinoma of oral tongue

Raju Adduri Sr  1 , Viswakalyan Kotapalli  1 , Neha A Gupta  2 , Swarnalata Gowrishankar  3 , Mukta Srinivasulu  4 , Mohammed Mujtaba Ali  4 , Subramanyeshwar Rao  5 , Shantveer G Uppin  6 , Umanath K Nayak  3 , Snehalatha Dhagam  7 , Mohana Vamsy Chigurupati  7 , Murali Dharan Bashyam  1
Affiliations

P53 nuclear stabilization is associated with FHIT loss and younger age of onset in squamous cell carcinoma of oral tongue

Raju Adduri Sr et al. BMC Clin Pathol. .

Abstract

Background: Squamous cell carcinoma of tongue (SCCT) is expected to harbor unique clinico-pathological and molecular genetic features since a significant proportion of patients are young and exhibit no association with tobacco or alcohol.

Methods: We determined P53, epidermal growth factor receptor, microsatellite instability, human papilloma virus infection and loss of heterozygosity status at several tumor suppressor loci in one hundred and twenty one oral SCCT (SSCOT) samples and analyzed their association with clinico-pathological features and patient survival.

Results: Our results revealed a significantly higher incidence of p53 nuclear stabilization in early (as against late) onset SCCOT. FHIT loss was significantly associated with p53 nuclear stabilization and the association was stronger in patients with no history of tobacco use. Samples harboring mutation in p53 DNA binding domain or exhibiting p53 nuclear stabilization, were significantly associated with poor survival.

Conclusion: Our study has therefore identified distinct features in SCCOT tumorigenesis with respect to age and tobacco exposure and revealed possible prognostic utility of p53.

Keywords: Disease specific survival; EGFR; FHIT; Oral tongue cancer; TP53.

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Figures

Figure 1
Figure 1
Immunohistochemistry based detection of p53 and EGFR in primary SCCOT samples. Representative results of nuclear stabilization (A) and negative staining (B) of p53 are shown. Panels C, D and E show representative results for strong, moderate and weak EGFR staining, respectively. Original magnification 100x.
Figure 2
Figure 2
Kaplan Meier curves of disease specific survival of SCCOT patients based on p53 nuclear stabilization (A), TP53 mutation (B) and FHIT LOH status (C).
See this image and copyright information in PMC

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