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Published on: July 21, 2018
Deforolimus (AP23573) a novel mTOR inhibitor in clinical development
Monica Mita1, Kamalesh Sankhala, Issam Abdel-Karim
1Institute for Drug Development, Cancer Therapy and Research Center, UT Health Science Center, San Antonio, USA. mitam@uthscsa.edu
Abstract:
mTOR was determined to be a promising anticancer target and several drug inhibitors of mTOR are currently in clinical development. Rapamycin (RAP) was the first mTOR inhibitor discovered. However, RAP has poor aqueous solubility and chemical stability and therefore its utilization at doses susceptible to produce an effect as an anticancer agent is limited. This represented the main rationale for developing new RAP analogs. The RAP analogs currently in clinical development as anticancer agents include temsirolimus (CCI-779), everolimus (RAD-001), and deforolimus (AP23573). These agents have demonstrated antiproliferative activity against a diverse range of malignancies in preclinical studies, and clinical evaluations have been very encouraging thus far. Deforolimus (AP23573), a non-RAP prodrug, has been tested in Phase I and II clinical trials and shows promising results in several tumor types including sarcoma. A Phase III study in patients with sarcoma is currently ongoing. The preclinical and clinical studies with deforolimus will be presented.
Insights
Deforolimus, an analog of Rapamycin, shows promise as an anticancer drug. This mTOR inhibitor is effective against various cancers, with ongoing Phase III trials for sarcoma treatment.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- The mechanistic target of rapamycin (mTOR) is a key target for cancer therapy.
- Rapamycin (RAP) was the first mTOR inhibitor, but its poor solubility and stability limit its clinical use.
- Development of RAP analogs is crucial for effective anticancer drug delivery.
Purpose of the Study:
- To present preclinical and clinical data on deforolimus (AP23573), a novel mTOR inhibitor.
- To highlight deforolimus's potential as an anticancer agent, particularly for sarcoma.
Main Methods:
- Review of preclinical studies evaluating antiproliferative activity.
- Summary of Phase I and II clinical trial outcomes for deforolimus.
- Discussion of ongoing Phase III clinical trials in sarcoma patients.
Main Results:
- Deforolimus demonstrated significant antiproliferative activity in preclinical models.
- Phase I and II trials showed encouraging results in various tumor types, including sarcoma.
- A Phase III trial for sarcoma is currently underway, indicating promising therapeutic potential.
Conclusions:
- Deforolimus is a promising mTOR inhibitor with demonstrated efficacy in preclinical and early clinical studies.
- Its favorable profile supports its continued investigation as a novel anticancer therapeutic.
- Deforolimus holds potential for treating challenging malignancies like sarcoma.
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