Ridaforolimus (Deforolimus, MK-8669)
For research use only.
Catalog No.S1022 Synonyms: AP23573
CAS No. 572924-54-0
Ridaforolimus (Deforolimus, MK-8669, AP23573) is a selective mTOR inhibitor with IC50 of 0.2 nM in HT-1080 cell line; while not classified as a prodrug, mTOR inhibition and FKBP12 binding is similar to rapamycin. Phase 3.
Selleck's Ridaforolimus (Deforolimus, MK-8669) has been cited by 12 publications
2 Customer Reviews
Breast cancer cells were pretreated with 100ng/ml EGF for 15 min and then treated with the indicated concentrations of Deforolimus for 24 hours.
Dr. Zhang of Tianjin Medical University. Ridaforolimus (Deforolimus, MK-8669) purchased from Selleck.
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|Description||Ridaforolimus (Deforolimus, MK-8669, AP23573) is a selective mTOR inhibitor with IC50 of 0.2 nM in HT-1080 cell line; while not classified as a prodrug, mTOR inhibition and FKBP12 binding is similar to rapamycin. Phase 3.|
Treatment of HT-1080 cells with Deforolimus induces a dose-dependent inhibition of phosphorylation of both S6 and 4E-BP1, with IC50 of 0.2 nM and 5.6 nM, respectively, and leads to a decrease in cell size, an increase in the proportion of cells in the G1 phase of the cell cycle, and inhibition of glucose uptake. Deforolimus displays significant antiproliferative activity a broad panel of cell lines with EC50 of 0.2-2.3 nM. Deforolimus potently and selectively inhibits VEGF production in a dose-dependent manner.  Deforolimus treatment significantly induces growth suppression in human NSCLC cell lines with IC30 values of 2.45-8.83 nM, with the exception of H157 with IC30 of >20 nM. Deforolimus treatment (2.8-5.9 nM) significantly dephosphorylates p70S6KThr389 in A549, H1703 and H157 cells, except H1666 that may express a resistant variant of mTORC1, and causes increased phosphorylation of pAKTser473 and pAKTThr308 in A549 and H1703 cells. Deforolimus in combination with the MEK inhibitors, CI-1040 or PD0325901 exhibits dose-dependent synergism in lung cancer cell lines, which is associated with the suppression of proliferation rather than enhancement of cell death, involving the inhibition of ribosomal biogenesis by 40% within 24 hours and a decreased polysome/monosome ratio. 
Administration of Deforolimus exerts significant antitumor effects in mice bearing PC-3 (prostate), HCT-116 (colon), MCF7 (breast), PANC-1 (pancreas) or A549 (lung) xenografts in a dose-dependent manner, and inhibits mTOR signaling in in SK-LMS-1 xenograft model associated with inhibition of tumor growth. 
Cell based target inhibition:HT-1080 cells are treated with increasing concentrations of Deforolimus (0-100 nM) for 2 hours, prior to harvest. Cellular lysates are extracted in denaturing lysis buffer, resolved on SDS-PAGE and transferred to PVDF membranes. After blocking, membranes are incubated with primary antibodies for 1 hour, followed by appropriate HRPconjugated secondary antibodies for 1 hour at room temperature. Immunoreactive proteins are detected using enhanced chemiluminescence and autoradiography performed by exposure to X-ray film. IC50 is determined from the inhibition of levels of phosphorylated ribosomal protein S6 (p-S6) and 4E-BP1 (p-4E-BP1).
-  Rivera VM, et al. Mol Cancer Ther, 2011, 10(6), 1059-1071.
-  Legrier ME, et al. Cancer Res, 2007, 67(23), 11300-11308.
-  Gayle SS, et al. Anticancer Agents Med Chem, 2012, 12(2), 151-162.
|In vitro||DMSO||198 mg/mL (199.95 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
4% Ethanol+5% Tween 80+5% propylene glycol
For best results, use promptly after mixing.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
In vivo Formulation Calculator (Clear solution)
|Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)|
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|% DMSO % % Tween 80 % ddH2O|
Working concentration： mg/ml；
Method for preparing DMSO master liquid: ： mg drug pre-dissolved in μL DMSO (Master liquid concentration mg/mL，)
Method for preparing in vivo formulation：Take DMSO master liquid, next addμL PEG300， mix and clarify, next addμL Tween 80，mix and clarify, next add μL ddH2O，mix and clarify.
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Clinical Trial Information
|NCT Number||Recruitment||interventions||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT01431547||Completed||Drug: dalotuzumab|Drug: ridaforolimus||Solid Tumors||Merck Sharp & Dohme Corp.||February 2012||Phase 1|
|NCT01431534||Terminated||Drug: Ridaforolimus||Solid Tumors||Merck Sharp & Dohme Corp.||January 30 2012||Phase 1|
|NCT01380184||Completed||Drug: ridaforolimus||Cancer Advanced||Merck Sharp & Dohme Corp.||July 5 2011||Phase 1|
|NCT01295632||Completed||Drug: ridaforolimus|Drug: MK-0752|Drug: MK-2206||Advanced Cancer||Merck Sharp & Dohme Corp.||February 2011||Phase 1|
|NCT01212627||Terminated||Drug: Ridaforolimus||Non-Small Cell Lung Cancer||Angela Taber MD|Rhode Island Hospital|The Miriam Hospital|Memorial Hospital of Rhode Island|Roger Williams Medical Center|Brown University||September 2010||Phase 1|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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