ArticleTumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine2014
α-Methylacyl-coenzyme A racemase (AMACR, p504s) is a marker to distinguish malignant melanomas from dysplastic nevi and melanocytic nevi.
Article in Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine, 2014. 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
Routinely processed skin biopsies are still the mainstay for the diagnosis of melanocytic skin neoplasms (MSNs) and are considered the "gold standard" for individual patient management and clinical trials. The diagnostic challenge of melanocytic lesions of the skin prompts histopathologists to consider new diagnostic tools; among these, immunohistochemistry. We aimed to find putative new immunohistochemical markers, which can supplement the histological criteria used to detect dysplasia. In this immunohistochemical study, we chose a panel of promising biomarkers which could potentially differentiate between different MSN entities. These included α-methylacyl-coenzyme A racemase (AMACR; p504s), which is involved in the degradation of branched chained fatty acid derivates. We analysed a cohort of benign nevi and malignant melanomas. The design of the study included 78 melanocytic skin neoplasms (26 malignant melanomas and 52 benign nevi) in a tissue microarray. Immunohistochemistry of cyclin-dependent kinase inhibitor 2A (p16Ink4a), methylacyl-coenzyme A racemase (AMACR), cyclin D1, and E-cadherin was performed and assessed. We have observed that the p16Ink4a, AMACR, cyclin D1, and E-cadherin showed no exclusive staining for nevi or melanomas. However, a significant overexpression of AMACR was found in malignant melanomas compared to benign nevi. AMACR overexpression was also associated with an increased p16Ink4a staining. Our results suggest AMACR as an immunohistochemical marker for distinguishing malignant melanomas and dysplastic nevi from conventional melanocytic nevi.
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