Wulfaenger, Jens and Biehl, Katharina and Tetzner, Anja and Wild, Peter and Ikenberg, Kristian and Meyer, Stefanie and Seliger, Barbara (2013) Heterogeneous expression and functional relevance of the ubiquitin carboxyl-terminal hydrolase L1 in melanoma. INTERNATIONAL JOURNAL OF CANCER, 133 (11). pp. 2522-2532. ISSN 0020-7136, 1097-0215
Full text not available from this repository. (Request a copy)Abstract
The expression of ubiquitin carboxyl-terminal hydrolase 1 (UCHL1) is deregulated in human cancer cells with tumor inhibiting or promoting functions. Due to less knowledge on the role of UCHL1 in melanoma progression, the expression pattern and function of UCHL1 as well as the deregulated signaling pathways were characterized. A large number of melanoma cell lines, tissue microarrays of melanoma lesions and control tissues were analyzed for UCHL1 expression using PCR, Western blot and/or immunohistochemistry. The analysis revealed that melanocyte cultures, 24 of 331 melanoma lesions, two of 18 short-term cultures and two of 19 melanoma cell lines tested, respectively, heterogeneously expressed UCHL1. The low frequency of UCHL1 expression in melanoma cells was due to gene silencing by promoter DNA hypermethylation. Using different transfection models an enzyme activity-dependent growth promoting function of UCHL1 via the activation of the mitogen-activated protein kinase signaling pathway was found in melanoma cells. Under oxygen stress a dose-dependent effect of UCHL1 was detected, which was mediated by a dynamic modification of the PI3K-Akt signaling. Thus, the aberrant UCHL1 expression in melanoma cells is linked to dynamic changes in growth properties and signal transduction cascades suggesting that UCHL1 provides a novel marker and/or therapeutic target at least for a subset of melanoma patients.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RENAL-CELL CARCINOMA; S18Y POLYMORPHIC VARIANT; PARKINSONS-DISEASE; TUMOR-SUPPRESSOR; DEUBIQUITINATING ENZYMES; PROMOTER METHYLATION; MALIGNANT-MELANOMA; EPITHELIAL-CELLS; UCH-L1; CANCER; UCHL1; ubiquitination; melanoma; biomarker |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Dermatologie und Venerologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Mar 2020 06:36 |
| Last Modified: | 26 Mar 2020 06:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15645 |
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