Abstract
Subjective histopathology is currently used to diagnose oral squamous cell carcinoma (OSCC). We tested if abundances of a panel of microRNA could be an objective OSCC indicator. Literature review enabled identification of 10 microRNAs associated with oral and head and neck malignancies. We extracted RNA from formalin-fixed paraffin-embedded biopsies; 20 each with OSCC, dysplasia, or histologically normal epithelium (HNE) and 10 with oral lichen planus (OLP). Relative abundances of microRNAs in HNE and OSCC were determined using reverse transcription and then real-time PCR with global mean normalization. MicroRNAs differentially expressed (test microRNA, T-miR) and non-differentially expressed (normalization microRNA, N-miR) were identified. The raw microRNA Cq data were incorporated in a developed algorithm that output a T-miR expression value (T-miREV) score. Raw Cq data from HNE, OSCC, dysplasia, and OLP samples were then used to test the algorithm scoring and OSCC classification. Four test and normalization microRNAs were identified. Algorithm output of T-mirEV >1 or <-1 indicated high and low OSCC probability score, respectively, and gave 88.9% sensitivity, 100% specificity, and 93.5% accuracy. Grouping high and intermediat...Continue Reading
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