Zahran F.Ghalwash D.Shaker O.Al-Johani K.Scully C.Division of Oral MedicineOral Diagnostic Sciences DepartmentFaculty of DentistryKing Abdulaziz UniversityJeddahSaudi Arabia; Department of Oral Medicine and PeriodontologyFaculty of Oral and Dental MedicineCairo UniversityCairoEgypt; Department of Oral Medicine and PeriodontologyFaculty of DentistryOctober University for Modern Sciences and Arts6th October CityEgypt; Department of Medical BiochemistryFaculty of MedicineCairo UniversityCairoEgypt; UCLLondonUnited Kingdom2020-01-092020-01-0920151354523Xhttps://doi.org/10.1111/odi.12340PubMed ID : 25784212https://t.ly/q220EScopusObjective: This study investigated the use of three salivary microRNAs (miRNA-21, miRNA-184, and miRNA-145) as possible markers for malignant transformation in oral mucosal lesions. Materials and methods: Salivary whole unstimulated samples were collected from a study group of 100 subjects, consisting of 20 clinically healthy controls, 40 patients with oral potentially malignant disorders (PMDs) [20 with dysplastic lesions and 20 without dysplasia], 20 with biopsy-confirmed oral squamous cell carcinoma (OSCC), and 20 with recurrent aphthous stomatitis (RAS) as disease controls. Total RNA was isolated and purified from saliva samples using the microRNA Isolation Kit (Qiagen, UL). miRNA expression analysis was performed using qRT-PCR (Applied Biosystems). Results: There was a highly significant increase in salivary miRNA-21 and miRNA-184 in OSCC and PMD (with and without dysplasia) when compared to healthy and disease controls (P�<�0.001). Conversely, miRNA-145 levels showed a highly significant decrease in OSCC and PMD overall (P�<�0.001). RAS cases showed no significant difference from normal controls in any measured miRNA (P�>�0.05). The only microRNA to discriminate between OSCC and PMD with dysplasia was miRNA-184. When receiver operating characteristic curves were designed for the three miRNAs, cutoff points delineating the occurrence of malignant change were a fourfold increase in miRNA-21 with specificity 65% and sensitivity 65%, a 0.6 decrease in miRNA-145, with specificity 70% and sensitivity 60%, and a threefold increase of miRNA-184, with specificity 75% and sensitivity 80%. Calculating the area under the curve revealed that miRNA-184 was the only one among the studied miRNAs that provided good diagnostic value. Conclusion: Salivary determination of the miRNAs tested might furnish a noninvasive, rapid adjunctive aid for revealing malignant transformation in oral mucosal lesions, particularly miRNA-184. � 2015 John Wiley & Sons A/S.EnglishOctober University for Modern Sciences and Artsجامعة أكتوبر للعلوم الحديثة والآدابUniversity of Modern Sciences and ArtsMSA UniversityMicroRNAMiRNA salivary biomarkersMiRNA-145MiRNA-184MiRNA-21Oral cancerOral malignant transformationPotentially malignant disordersmicroRNAmicroRNA 145microRNA 184microRNA 21unclassified drugmicroRNAMIRN145 microRNA, humanMIRN184 microRNA, humanMIRN21 microRNA, humantumor markeradultagedaphthous stomatitisArticlecontrolled studydysplasiafemalehumanmajor clinical studymalemalignant transformationmouth cancermouth squamous cell carcinomaoral biopsyoral mucosal diseasepriority journalprotein expressionsaliva analysissaliva levelCarcinoma, Squamous Cellcase control studychemistrygeneticsmiddle agedMouth Neoplasmspathologyprecancerreceiver operating characteristicsalivaAdultAgedBiomarkers, TumorCarcinoma, Squamous CellCase-Control StudiesFemaleHumansMaleMicroRNAsMiddle AgedMouth NeoplasmsPrecancerous ConditionsROC CurveSalivaStomatitis, AphthousArticlehttps://doi.org/10.1111/odi.12340PubMed ID : 25784212