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  • Title: Investigation of prognostic indicators for human uveal melanoma as biomarkers of canine uveal melanoma metastasis.
    Author: Malho P, Dunn K, Donaldson D, Dubielzig RR, Birand Z, Starkey M.
    Journal: J Small Anim Pract; 2013 Nov; 54(11):584-93. PubMed ID: 24580015.
    Abstract:
    OBJECTIVE: To evaluate if 14 genes that discriminate metastasising and non-metastasising human uveal melanomas can differentiate metastasising and non-metastasising uveal melanomas in dogs. METHODS: Nineteen archival biopsies of eyes with a histopathological classification of primary benign (n = 9) and malignant (n = 10) uveal melanoma were selected. Thoracic and/or abdominal metastases confirmed metastatic spread of the primary tumour in seven dogs during the follow-up period. Gene expression was assayed by Reverse Transcription-quantitative Polymerase Chain Reaction. Genes displaying statistically significant differences in expression between the metastasising and non-metastasising tumours were identified. RESULTS: Four genes (HTR2B, FXR1, LTA4H and CDH1) demonstrated increased expression in the metastasising uveal melanomas. CLINICAL SIGNIFICANCE: This preliminary study illustrates the potential utility of gene expression markers for predicting canine uveal melanoma metastasis. The genes displaying elevated expression in the metastasising tumours are part of a 12-discriminating gene set used in a routine assay, performed on fine needle aspirate biopsies collected without enucleation, for predicting human uveal melanoma metastasis. Further work is required to validate the results.
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