Learn More
BACKGROUND The management of Merkel cell carcinoma (MCC) has been complicated by a lack of detailed prognostic data and by the presence of conflicting staging systems. OBJECTIVE We sought to determine the prognostic significance of tumor size, clinical versus pathologic nodal evaluation, and extent of disease at presentation and thereby derive the first(More)
BACKGROUND Merkel cell polyomavirus (MCPyV) has been detected in approximately 75% of patients with the rare skin cancer Merkel cell carcinoma. We investigated the prevalence of antibodies against MCPyV in the general population and the association between these antibodies and Merkel cell carcinoma. METHODS Multiplex antibody-binding assays were used to(More)
Merkel cell polyomavirus (MCPyV) is a common infectious agent that is likely involved in the etiology of most Merkel cell carcinomas (MCC). Serum antibodies recognizing the MCPyV capsid protein VP1 are detectable at high titer in nearly all MCC patients and remain stable over time. Although antibodies to the viral capsid indicate prior MCPyV infection, they(More)
BACKGROUND A recent report suggested a trend toward more ultraviolet-linked skin cancers arising on the left rather than the right side of the body in the United States. OBJECTIVE We sought to test whether the reported incidences of two ultraviolet-linked skin cancers, malignant melanoma (MM) and Merkel cell carcinoma (MCC), are statistically(More)
BACKGROUND Merkel cell polyomavirus (MCPyV) is present in approximately 80% of human Merkel cell carcinomas (MCCs). A previous in silico prediction suggested MCPyV encodes a microRNA (miRNA) that may regulate cellular and viral genes. OBJECTIVES To determine the presence and prevalence of a putative MCPyV-encoded miRNA in human MCC tumors. STUDY DESIGN(More)
PURPOSE Merkel cell carcinoma (MCC) is a polyomavirus-associated skin cancer that is frequently lethal and lacks established prognostic biomarkers. This study sought to identify biomarkers that improve prognostic accuracy and provide insight into MCC biology. PATIENTS AND METHODS Gene expression profiles of 35 MCC tumors were clustered based on prognosis.(More)
PURPOSE Merkel cell polyomavirus (MCPyV) is prevalent in the general population, integrates into most Merkel cell carcinomas (MCC), and encodes oncoproteins required for MCC tumor growth. We sought to characterize T-cell responses directed against viral proteins that drive this cancer as a step toward immunotherapy. EXPERIMENTAL DESIGN Intracellular(More)
Merkel cell carcinoma (MCC) is a rare and aggressive form of skin cancer. In at least 80% of all MCC, Merkel cell polyomavirus (MCPyV) DNA has undergone clonal integration into the host cell genome, and most tumors express the MCPyV large and small T antigens. In all cases of MCC reported to date, the integrated MCPyV genome has undergone mutations in the(More)
Merkel cell carcinoma (MCC) is an aggressive, polyomavirus-associated skin cancer. Robust cellular immune responses are associated with excellent outcomes in patients with MCC, but these responses are typically absent. We determined the prevalence and reversibility of major histocompatibility complex class I (MHC-I) downregulation in MCC, a potentially(More)
PURPOSE The persistent expression of Merkel cell polyomavirus (MCPyV) oncoproteins in Merkel cell carcinoma (MCC) provides a unique opportunity to characterize immune evasion mechanisms in human cancer. We isolated MCPyV-specific T cells and determined their frequency and functional status. EXPERIMENTAL DESIGN Multiparameter flow cytometry panels and(More)