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Published on: June 18, 2018
Targeting the translational machinery as a novel treatment strategy for hematologic malignancies
Patrick R Hagner1, Abraham Schneider, Ronald B Gartenhaus
1Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
Abstract:
The dysregulation of protein synthesis evident in the transformed phenotype has opened up a burgeoning field of research in cancer biology. Translation initiation has recently been shown to be a common downstream target of signal transduction pathways deregulated in cancer and initiated by mutated/overexpressed oncogenes and tumor suppressors. The overexpression and/or activation of proteins involved in translation initiation such as eIF4E, mTOR, and eIF4G have been shown to induce a malignant phenotype. Therefore, understanding the mechanisms that control protein synthesis is emerging as an exciting new research area with significant potential for developing innovative therapies. This review highlights molecules that are activated or dysregulated in hematologic malignancies, and promotes the transformed phenotype through the deregulation of protein synthesis. Targeting these proteins with small molecule inhibitors may constitute a novel therapeutic approach in the treatment of cancer.
Insights
Dysregulated protein synthesis, particularly translation initiation, drives cancer's transformed phenotype. Targeting key proteins like eIF4E, mTOR, and eIF4G offers novel therapeutic strategies for hematologic malignancies.
Area of Science:
- Cancer Biology
- Molecular Oncology
- Translational Medicine
Background:
- Protein synthesis dysregulation is a hallmark of the transformed cancer phenotype.
- Translation initiation is a common target of deregulated signaling pathways in cancer.
- Aberrant expression of translation initiation factors (e.g., eIF4E, mTOR, eIF4G) promotes malignancy.
Purpose of the Study:
- To review molecules dysregulated in hematologic malignancies.
- To highlight their role in promoting the transformed phenotype via protein synthesis deregulation.
- To explore potential therapeutic strategies targeting these molecules.
Main Methods:
- Literature review of molecular mechanisms in cancer biology.
- Analysis of signal transduction pathways in hematologic malignancies.
- Identification of key proteins involved in translation initiation.
Main Results:
- Identified specific proteins (eIF4E, mTOR, eIF4G) activated or dysregulated in cancer.
- Demonstrated their role in promoting malignant transformation through protein synthesis control.
- Highlighted the potential of targeting these proteins in hematologic cancers.
Conclusions:
- Understanding protein synthesis control is crucial for novel cancer therapies.
- Targeting dysregulated translation initiation factors with small molecule inhibitors shows promise.
- This approach may offer a new therapeutic avenue for treating hematologic malignancies.
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