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. 2021 Mar 9;13(5):1167.
doi: 10.3390/cancers13051167.

Relevance of 2'-O-Methylation and Pseudouridylation for the Malignant Melanoma

Simon Jasinski-Bergner  1 , Juliane Blümke  1 , Claudia Wickenhauser  2 , Barbara Seliger  1   3
Affiliations

Relevance of 2'-O-Methylation and Pseudouridylation for the Malignant Melanoma

Simon Jasinski-Bergner et al. Cancers (Basel). .

Abstract

The two RNA modifications 2'-O-methylation and pseudouridylation occur on several RNA species including ribosomal RNAs leading to an increased translation as well as cell proliferation associated with distinct functions. Using malignant melanoma (MM) as a model system the proteins mediating these RNA modifications were for the first time analyzed by different bioinformatics tools and public available databases regarding their expression and histological localization. Next to this, the impact of these RNA-modifying factors on prognostic relevant processes and marker genes of malignant melanoma was investigated and correlated to immune surveillance and evasion strategies. The RNA modifying factors exerted statistically significant positive correlations to the expression of genes involved in cell proliferation and were statistically significant negative correlated to the expression of human leukocyte antigen class I genes as well as of components of the antigen processing machinery in malignant melanoma. Upregulation of the RNA modifying proteins was of prognostic relevance in this tumor disease with a negative impact on the overall survival of melanoma patients. Furthermore, the expression of known oncogenic miRs, which are induced in malignant melanoma, directly correlated to the expression of factors involved in these two RNA modifications.

Keywords: 2′-O-methylation; malignant melanoma; microRNA; pseudouridylation; snoRNA.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Molecular RNA modifications on RNAs involving snoRNAs. (A) 2′-O-methylation and (B) pseudouridylation.
Figure 2
Figure 2
Representative immunohistochemical stainings of selected factors involved in 2′-O-methylation and pseudouridylation in human skin and melanoma specimen.
Figure 3
Figure 3
Summarizing visualization as a heatmap of the positive and negative correlations of factors involved in 2′-O-methylation and pseudouridylation with melanoma relevant markers of cell proliferation, prognostic markers, and genes involved in immune surveillance as well as immune evasion.
Figure 4
Figure 4
Impact of factors involved in 2′-O-methylation and pseudouridylation on the overall survival in MM. (A–H): Kaplan–Meier Plots were generated with TCGA data of 214 melanoma specimens provided by the R2 database (https://hgserver1.amc.nl/ (accessed on 12 February 2021)).
Figure 5
Figure 5
Impact of the RNA modifications analyzed on tumor relevant processes.
See this image and copyright information in PMC

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