TY - JOUR T1 - Expression of Notch 3 and Jagged 1 Is Associated With Merkel Cell Polyomavirus Status and Prognosis in Merkel Cell Carcinoma JF - Anticancer Research JO - Anticancer Res SP - 319 LP - 329 DO - 10.21873/anticanres.13114 VL - 39 IS - 1 AU - LUSI OKA WARDHANI AU - MICHIKO MATSUSHITA AU - SATOSHI KUWAMOTO AU - DAISUKE NONAKA AU - KEIKO NAGATA AU - MASAKO KATO AU - YUKISATO KITAMURA AU - KAZUHIKO HAYASHI Y1 - 2019/01/01 UR - http://ar.iiarjournals.org/content/39/1/319.abstract N2 - Background/Aim: Merkel cell carcinoma (MCC) is a rare, aggressive, neuroendocrine skin cancer and most MCCs are related to infection with Merkel cell polyomavirus (MCPyV). Notch signaling modulates cell fate in various tissues including the skin during development and homeostasis, and its aberrant activity relates to onset and progression of various malignancies. Therefore, association of NOTCH1/ NOTCH2/NOTCH3/jagged 1 (JAG1) expression with MCPyV status and prognosis in MCC was investigated. Materials and Methods: A total of 19 MCPyV-positive and 19 MCPyV-negative MCC samples from patients were stained immunohistochemically with antibodies against NOTCH1, NOTCH2, NOTCH3, and JAG1 and analyzed. Results: Expression of NOTCH1 and NOTCH2 was not associated with MCPyV status or prognosis. However, higher JAG1 expression was found in MCPyV-negative than in MCPyV-positive MCC (p<0.001), and NOTCH3 expression was higher in MCPyV-positive MCC (p=0.062). Kaplan–Meier and multivariate analyses showed that patients with MCC with higher NOTCH3 expression had better overall survival than otherwise (p=0.001 and p=0.033, respectively). Conclusion: Expression of NOTCH3, as a tumor suppressor, is an independent predictor of MCC outcome. ER -