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- Title
Expression of β-catenin and cyclin D1 in Merkel cell carcinomas of the head and neck.
- Authors
Lill, Claudia; Schneider, Sven; Ghanim, Bahil; Brunner, Markus; Heiduschka, Gregor; Loewe, Robert; Thurnher, Dietmar
- Abstract
Background: Merkel cell carcinomas (MCC) are very aggressive tumors of the sun-exposed skin with a high potential to metastasize. Little is known about the genesis of MCC and very few prognostic markers have been detected so far. The Wnt pathway protein β-catenin and the cell cycle protein cyclin D1 are two promotors of tumor growth and are expressed in a variety of malignant neoplasms such as lymphomas, thyroid, breast cancer, and many others. Patients and Methods: Tissue samples of 27 patients with MCC were immunohistochemically stained for β-catenin and cyclin D1 and correlated with overall survival of patients. In addition, western blot analysis was carried out in the two MCC cell lines MCC-13 and MCC-26. Results: β-catenin showed a cytoplasmatic expression of 10-30 % in 11 samples and an expression lower than 10 % in eight samples. Nuclear staining was visible in two samples. None of the 27 samples expressed cyclin D1. Conclusion: Neither cyclin D1 nor β-catenin was expressed in a statistically significant manner, concluding that the development of MCCs is independent of β-catenin and cyclin D1 expression and these proteins are not suitable as prognostic markers. We could describe the expression pattern of cyclin D1 for the first time.
- Subjects
CATENINS; CYCLINS; MERKEL cell carcinoma; NEUROENDOCRINE tumors; METASTASIS
- Publication
Wiener Klinische Wochenschrift, 2013, Vol 125, Issue 17/18, p501
- ISSN
0043-5325
- Publication type
Article
- DOI
10.1007/s00508-013-0406-3