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Ref Type Journal Article
PMID (28819023)
Authors Conforti F, Zhang X, Rao G, De Pas T, Yonemori Y, Rodriguez JA, McCutcheon JN, Rahhal R, Alberobello AT, Wang Y, Zhang YW, Guha U, Giaccone G
Title Therapeutic Effects of XPO1 Inhibition in Thymic Epithelial Tumors.
Journal Cancer research
Vol 77
Issue 20
Date 2017 Oct 15
URL
Abstract Text Exportin 1 (XPO1) mediates nuclear export of many cellular factors known to play critical roles in malignant processes, and selinexor (KPT-330) is the first XPO1-selective inhibitor of nuclear export compound in advanced clinical development phase for cancer treatment. We demonstrated here that inhibition of XPO1 drives nuclear accumulation of important cargo tumor suppressor proteins, including transcription factor FOXO3a and p53 in thymic epithelial tumor (TET) cells, and induces p53-dependent and -independent antitumor activity in vitro Selinexor suppressed the growth of TET xenograft tumors in athymic nude mice via inhibition of cell proliferation and induction of apoptosis. Loss of p53 activity or amplification of XPO1 may contribute to resistance to XPO1 inhibitor in TET. Using mass spectrometry-based proteomics analysis, we identified a number of proteins whose abundances in the nucleus and cytoplasm shifted significantly following selinexor treatment in the TET cells. Furthermore, we found that XPO1 was highly expressed in aggressive histotypes and advanced stages of human TET, and high XPO1 expression was associated with poorer patient survival. These results underscore an important role of XPO1 in the pathogenesis of TET and support clinical development of the XPO1 inhibitor for the treatment of patients with this type of tumors. Cancer Res; 77(20); 5614-27. ©2017 AACR.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
TP53 loss thymoma predicted - resistant Selinexor Preclinical - Cell culture Actionable In a preclinical study, a thymoma cell line with TP53 loss demonstrated primary resistance to Selinexor (KPT-330) in culture, and reconstitution of TP53 expression resulted in increased Selinexor sensitivity (PMID: 28819023). 28819023