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|Ref Type||Journal Article|
|Authors||Chen H, Luo D, Zhang L, Lin X, Luo Q, Yi H, Wang J, Yan X, Li B, Chen Y, Liu X, Zhang H, Liu S, Qiu M, Yang D, Jiang N|
|Title||Restoration of p53 using the novel MDM2-p53 antagonist APG115 suppresses dedifferentiated papillary thyroid cancer cells.|
|Date||2017 Apr 24|
|Abstract Text||Dedifferentiated papillary thyroid cancer (DePTC) is characterized by aggressive growth, recurrence, distant metastasis, and resistance to radioactive iodine (RAI) therapy. DePTC is also accompanied by poor prognosis and high early-mortality. Nevertheless, most DePTC cells show intact p53 downstream functionality. In cells with wild-type p53, the murine double minute2 (MDM2) protein interacts with p53 and abrogates its activity. Inhibition of the MDM2-p53 interaction restores p53 activity and leads to cell cycle arrest and apoptosis. Restoring p53 function by inhibiting its interaction with p53 suppressors such as MDM2 is thus a promising therapeutic strategy for the treatment of DePTC. The novel MDM2-p53 interaction antagonist APG115 is an analogue of SAR405838, and is being tested in a phase I clinical trial. In this study, we evaluated the efficacy of APG115 as a single-agent to treat DePTC. APG115 diminished the viability of p53 wild-type DePTC cells and induced cell cycle arrest and apoptosis. In a human xenograft mouse model, APG115 elicited robust tumor regression and cell apoptosis. These data demonstrate that further research is warranted to determine whether APG115 can be used to effectively treat DePTC patients.|
|Molecular Profile||Treatment Approach|
|Gene Name||Source||Synonyms||Protein Domains||Gene Description||Gene Role|
|Drug Name||Trade Name||Synonyms||Drug Classes||Drug Description|
|APG-115||APG115|APG 115|Alrizomadlin||MDM2 Inhibitor 20||APG-115, a derivative of SAR405838, inhibits MDM2 and its interaction with p53, thereby stabilizing and activating wild-type p53, which may result in antitumor activity and also synergizes with PD-1 inhibitors (PMID: 28498808, PMID: 31779710).|
|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 wild-type||thyroid gland papillary carcinoma||sensitive||APG-115||Preclinical - Cell line xenograft||Actionable||In a preclinical study, a TP53 wild-type dedifferentiated papillary thyroid carcinoma cell line treated with APG-115 demonstrated decreased cell viability and induction of cell cycle arrest and apoptosis in culture, and tumor growth suppression and tumor regression in xenograft models (PMID: 28498808).||28498808|