A Profound Basic Characterization of eIFs in Gliomas: Identifying eIF3I and 4H as Potential Novel Target Candidates in Glioma Therapy
| Autor: | Gord von Campe, Andrea Borenich, Stefan L Leber, Christina Skofler, Nicole Golob-Schwarzl, Stefanie Krassnig, Serge Weis, Marlene Mayer, Martin Benesch, Nadine Gantenbein, Kariem Mahdy-Ali, Anna Maria Birkl-Toeglhofer, Marlene Leoni, Andrea Raicht, Christina Wohlrab, Martin Asslaber, Johannes Haybaeck, Christoph Schatz |
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| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Cancer Research lcsh:RC254-282 Article 03 medical and health sciences 0302 clinical medicine eukaryotic initiation factors (eIFs) Diffuse Astrocytoma Eukaryotic initiation factor Glioma medicine PI3K/AKT/mTOR pathway business.industry anaplastic astrocytoma EIF4H glioblastoma Astrocytoma EIF4A1 lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens medicine.disease diffuse astrocytoma nervous system diseases 030104 developmental biology Oncology 030220 oncology & carcinogenesis mTOR signaling Cancer research business Anaplastic astrocytoma |
| Zdroj: | Cancers Cancers, Vol 13, Iss 1482, p 1482 (2021) Volume 13 Issue 6 |
| ISSN: | 2072-6694 |
| DOI: | 10.3390/cancers13061482 |
| Popis: | Simple Summary Gliomas are brain tumors with currently limited therapy options. Glioma growth and proliferation is regulated by the mTOR pathway together with eukaryotic initiation factors (eIFs). In this work we show a profound basic characterization of eIFs in human gliomas and demonstrate increased mRNA and protein expressions of several eIFs in gliomas compared to healthy control brain tissue. Moreover, increased eIF3I and eIF4H levels seem to have a negative influence on the survival of patients. Our work suggests eIF3I and eIF4H as potential targets for future glioma therapy. Abstract Glioblastoma (GBM) is an utterly devastating cerebral neoplasm and current therapies only marginally improve patients’ overall survival (OS). The PI3K/AKT/mTOR pathway participates in gliomagenesis through regulation of cell growth and proliferation. Since it is an upstream regulator of the rate-limiting translation initiation step of protein synthesis, controlled by eukaryotic initiation factors (eIFs), we aimed for a profound basic characterization of 17 eIFs to identify potential novel therapeutic targets for gliomas. Therefore, we retrospectively analyzed expressions of mTOR-related proteins and eIFs in human astrocytoma samples (WHO grades I–IV) and compared them to non-neoplastic cortical control brain tissue (CCBT) using immunoblot analyses and immunohistochemistry. We examined mRNA expression using qRT-PCR and additionally performed in silico analyses to observe the influence of eIFs on patients’ survival. Protein and mRNA expressions of eIF3B, eIF3I, eIF4A1, eIF4H, eIF5 and eIF6 were significantly increased in high grade gliomas compared to CCBT and partially in low grade gliomas. However, short OS was only associated with high eIF3I gene expression in low grade gliomas, but not in GBM. In GBM, high eIF4H gene expression significantly correlated with shorter patient survival. In conclusion, we identified eIF3I and eIF4H as the most promising targets for future therapy for glioma patients. |
| Databáze: | OpenAIRE |
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