ArticleBMC cancer2025
Detection and significance of HPV16 E5-specific productive transcripts in oropharyngeal carcinoma.
Article in BMC cancer, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundHPV16 is implicated in around 30% of oropharyngeal cancers (OPCs). HPV-associated OPCs generally show a better prognosis, but 20% deviate from this trend, indicating a need for better molecular profiling. HPV16-E5 is an oncoprotein encoded by an mRNA that undergoes extensive splicing, with only one specific transcript being translatable. The prognostic significance of this E5-productive transcript in HPV-related OPCs is not well-studied.
methodsWe retrospectively analysed 74 HPV16-positive OPC cases diagnosed between 2011 and 2021. FFPE tissue samples were used for p16, EGFR, and HLA-I analysis by immunohistochemistry while E5, productive E5, E6 and E7 transcripts were detected by qPCR. Survival analysis was conducted using Kaplan-Meier curves and log-rank tests.
resultsProductive HPV16-E5 transcripts were detected in 11.3% of OPCs. There was no significant association between HPV16-E5 transcripts and EGFR or HLA-I expression. However, the presence of the productive E5 transcript was associated with worse progression-free survival (PFS) (p = 0.0024). EGFR or HLA-I expression was not significantly associated with PFS (p = 0.17 and p = 0.93, respectively).
conclusionsThis study demonstrates for the first time the presence of E5-productive transcripts in HPV16-positive OPCs and its association with poorer PFS, highlighting its potential as a prognostic marker. Further research with larger cohorts is needed to validate these findings.
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