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• W2330804977 abstract "Proceedings: AACR 102nd Annual Meeting 2011‐‐ Apr 2‐6, 2011; Orlando, FLHead and neck squamous cell carcinoma (HNSCC) accounts for more than 37,000 new cases in the US each year. More than half of the patients present in an advanced stage, which confers a poor prognosis. However if detected early this cancer maybe highly curable. Currently there is no biomarker in clinical practice for early detection or prognosis prediction. Many studies are attempting to discover potential biomarkers in tissue, saliva and serum. Promoter methylation suppresses gene expression in cancer and several candidates have been demonstrated to be cancer specific biomarkers. Increased mitochondrial content is another feature that has been demonstrated related to cancer. Our goal is to validate potential biomarkers previously described by our group and others to be linked to HNSCC, in serum samples from a cohort of patients with longitudinal follow up and a subset of normal subjects’ samples. We assessed mitochondrial DNA content (Cox I and Cox II) and methylation status of EDNRB and KIF1a by quantitative PCR in an evaluation set of samples consisting of 75 pre and post treatment serum samples from HNSCC patients and from 11 healthy cancer-free subjects. In tumors, the observed methylation frequencies were 17%, 22% for EDNRB and KIF1a, respectively. There was no observed methylation for EDNRB and KIF1a in normal samples. Increased mitochondrial DNA content was observed in 54% and 59% of the HNSCC samples, by COX1 and COX2, respectively. And no increased content was noted in the normal set. Combining all the markers and analyzing as a panel (at least one positive), we obtained a sensitivity of 83% with specificity of 100%. When we compared post treatment samples to pre treatment samples, we noticed a decreased mitochondrial DNA content in patients without recurrence, and an increase in patients that recurred, however, due to the small number of samples, these associations needs to be confirmed. Our findings indicate that a serum based panel that includes mitochondrial DNA content analysis and cancer specific methylation markers may serve as a high quality detection tool for HNSCC, as well as recurrence prediction. Validation of these preliminary data is ongoing in a larger independent cohort with comprehensive clinical and follow up data.Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 3170. doi:10.1158/1538-7445.AM2011-3170" @default.
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• W2330804977 date "2011-04-15" @default.
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• W2330804977 title "Abstract 3170: Early detection and follow up of head and neck squamous cell carcinoma – A longitudinal serum based biomarker study" @default.
• W2330804977 doi "https://doi.org/10.1158/1538-7445.am2011-3170" @default.
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