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Initiation and elongation factor co-expression correlates with recurrence and survival in epithelial ovarian cancer
Monika Sobočan, Daniela Brunialti, S Sprung, Christoph Schatz, Jure Knez, Rajko Kavalar, Iztok Takač, Johannes Haybaeck, 2022, izvirni znanstveni članek

Opis: High grade epithelial ovarian cancer (EOC) represents a diagnostic and therapeutic challenge due to its aggressive features and short recurrence free survival (RFS) after primary treatment. Novel targets to inform our understanding of the EOC carcinogenesis in the translational machinery can provide us with independent prognostic markers and provide drugable targets. We have identified candidate eukaryotic initiation factors (eIF) and eukaryotic elongation factors (eEF) in the translational machinery for differential expression in EOC through in-silico analysis. We present the analysis of 150 ovarian tissue microarray (TMA) samples on the expression of the translational markers eIF2α, eIF2G, eIF5 (eIF5A and eIF5B), eIF6 and eEF1A1. All translational markers were differentially expressed among non-neoplastic ovarian samples and tumour samples (borderline tumours and EOC). In EOC, expression of eIF5A was found to be significantly correlated with recurrence free survival (RFS) and expression of eIF2G and eEF1A1 with overall survival (OS). Expression correlation among factor subunits showed that the correlation of eEF1A1, eIF2G, EIF2α and eIF5A were significantly interconnected. eIF5A was also correlated with eIF5B and eIF6. Our study demonstrates that EOCs have different translational profile compared to benign ovarian tissue and that eIF5A is a central dysregulated factor of the translation machinery.
Ključne besede: epithelial ovarian cancer, initiation and elongation factor, translational markers
Objavljeno v DKUM: 12.12.2024; Ogledov: 0; Prenosov: 2
Celotno besedilo (1,70 MB)
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Translational regulation in hepatocellular carcinogenesis
Suzana Bračič Tomažič, Christoph Schatz, Johannes Haybaeck, 2021, pregledni znanstveni članek

Opis: The mortality of hepatocellular carcinoma (HCC) is distributed unevenly worldwide. One of the major causes is hepatitis B or hepatitis C virus infection and the development and progression of liver cirrhosis. The carcinogenesis of HCC is among others regulated via the mTOR (mechanistic target of rapamycin) signaling pathway and represents a possible method of targeted treatment. The aim of our article was to address the most recent clinical advances and findings of basic studies on the mTOR signaling pathway and the involved factors. Risk factors play a key role in dysregulation of the signaling pathway, where both mTORCs are upregulated and protein synthesis is altered. eIFs and, to a lesser extent, eEFs play an essential role in this process. Whether the factor will be upregulated or downregulated, among others, depends on hepatitis B/C virus infection. The amount of a particular factor in a patient sample lets us know whether HCC recurrence will occur, what is the likelihood of chemoresistance, and what outcome is predicted for patients with an increased value. Our analysis shows that in addition to mTOR, eIF3, eIF4, and eIF5 play an important role, as they can serve as biomarkers for non- and virus-related HCC.
Ključne besede: mTOR, virus related HCC, non-virus related HCC, cancer, translation initiation, liver
Objavljeno v DKUM: 18.10.2024; Ogledov: 0; Prenosov: 2
Celotno besedilo (4,21 MB)
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