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p53 regulation by TRP2 is not pervasive in melanoma

Please always quote using this URN: urn:nbn:de:bvb:20-opus-111396
  • p53 is a central tumor suppressor protein and its inhibition is believed to be a prerequisite for cancer development. In approximately 50% of all malignancies this is achieved by inactivating mutations in the p53 gene. However, in several cancer entities, including melanoma, p53 mutations are rare. It has been recently proposed that tyrosinase related protein 2 (TRP2), a protein involved in melanin synthesis, may act as suppressor of the p53 pathway in melanoma. To scrutinize this notion we analyzed p53 and TRP2 expression byp53 is a central tumor suppressor protein and its inhibition is believed to be a prerequisite for cancer development. In approximately 50% of all malignancies this is achieved by inactivating mutations in the p53 gene. However, in several cancer entities, including melanoma, p53 mutations are rare. It has been recently proposed that tyrosinase related protein 2 (TRP2), a protein involved in melanin synthesis, may act as suppressor of the p53 pathway in melanoma. To scrutinize this notion we analyzed p53 and TRP2 expression by immunohistochemistry in 172 melanoma tissues and did not find any correlation. Furthermore, we applied three different TRP2 shRNAs to five melanoma cell lines and could not observe a target specific effect of the TRP2 knockdown on either p53 expression nor p53 reporter gene activity. Likewise, ectopic expression of TRP2 in a TRP2 negative melanoma cell line had no impact on p53 expression. In conclusion our data suggest that p53 repression critically controlled by TRP2 is not a general event in melanoma.show moreshow less

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Metadaten
Author: Sebastian Haferkamp, Sonja Hesbacher, Gerhard Weyandt, Claudia S. Vetter-Kauczok, Jürgen C. Becker, Stephanie Motschenbacher, Marion Wobser, Melissa Maier, Corinna P. Schmid, Roland Houben
URN:urn:nbn:de:bvb:20-opus-111396
Document Type:Journal article
Faculties:Medizinische Fakultät / Klinik und Poliklinik für Dermatologie, Venerologie und Allergologie
Language:English
Year of Completion:2014
Source:PLoS ONE 9(1): e87440. doi:10.1371/journal.pone.0087440
DOI:https://doi.org/10.1371/journal.pone.0087440
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Tag:apoptosis; cell staining; histology; immunohistochemistry techniques; melanoma cell; melanomas; reporter genes; tumor suppressor genes
Release Date:2015/04/02
Collections:Open-Access-Publikationsfonds / Förderzeitraum 2014
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung