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The past, present, and future of CRM1/XPO1 inhibitors
1Department of Medicine, Section of Hematology/Oncology, University of Chicago Medicine, Chicago, IL, USA.
Abstract:
Therapies targeted at inhibiting nucleo-cytoplasmic transport have found broad applications in the field of oncology. Chromosome region maintenance 1 (CRM1), better known as exportin 1 (XPO1), is the protein transporter responsible for the nucleo-cytoplasmic shuttling of most of the tumor suppressor proteins (TSP) and growth regulatory factors. XPO1 is also upregulated in many malignancies and associated with a poor prognosis. Its inhibition has been a target of therapy, and hence, the selective inhibitors of nuclear transport (SINE) compounds were developed as a novel class of anti-cancer agents. The most well-known SINE agent is selinexor (KPT-330) and has been widely tested in phase I and II clinical trials in both solid tumors and hematologic malignancies. This review discusses how dysregulation of XPO1 promotes tumorigenesis, the historical considerations in the development of SINE compounds, and their role in current clinical therapies.
Insights
Selective inhibitors of nuclear transport (SINE) target exportin 1 (XPO1), a protein crucial for tumor suppressor transport. This review explores XPO1 dysregulation in cancer and the therapeutic potential of SINE compounds like selinexor.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Nucleo-cytoplasmic transport is vital for cellular regulation.
- Exportin 1 (XPO1) mediates the transport of tumor suppressors and growth factors.
- XPO1 dysregulation is implicated in numerous cancers, correlating with poor prognosis.
Purpose of the Study:
- To review the role of XPO1 dysregulation in promoting tumorigenesis.
- To discuss the historical development of selective inhibitors of nuclear transport (SINE) compounds.
- To examine the current clinical applications of SINE compounds in cancer therapy.
Main Methods:
- Literature review of studies on XPO1 function, cancer biology, and SINE compounds.
- Analysis of clinical trial data for SINE agents, particularly selinexor.
- Synthesis of information on the mechanism of action and therapeutic efficacy.
Main Results:
- XPO1 inhibition represents a promising therapeutic strategy in oncology.
- SINE compounds, such as selinexor, have demonstrated activity in various solid tumors and hematologic malignancies.
- Clinical trials indicate the potential of SINEs in treating cancers with XPO1 upregulation.
Conclusions:
- Targeting XPO1 offers a novel approach to cancer treatment.
- SINE compounds are emerging as a significant class of anti-cancer agents.
- Further research and clinical evaluation are ongoing to optimize SINE-based therapies.
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