KI-ARv-03
KI-ARv-03 is a potent and selective ATP-competitive CDK9 inhibitor with an IC₅₀ of 0.15 μM (at 45 μM ATP), exhibiting over 130-fold selectivity against other CDKs (including CDK1-7). KI-ARv-03 reduces androgen receptor (AR)-driven transcription and proliferation in prostate cancer cells. KI-ARv-03 can be used for leukemia, pancreatic cancer, alveolar rhabdomyosarcoma (ARMS) and castration-resistant prostate cancer (CRPC) research. KI-ARv-03 is a ligand for target protein for PROTAC. KI-ARv-03 can be used to synthesize PROTAC KI-CDK9d-32 (HY-173523)[1][2].
For research use only. We do not sell to patients.
- CAS No.: 2416873-72-6
- Formula: C14H21N5
- Molecular Weight:259.35
-
Storage:
Please store the product under the recommended conditions in the Certificate of Analysis.
-
Biological Activity
-
Chemical Information
- Purity & Documentation
- References
-
Help & FAQs
Biological Activity
|
CDK9 0.15 μM (IC50) |
KI-ARv-03 binds in the ATP-pocket of CDK9, forming critical interactions with hinge residues Glu107, His108, and the DFG-motif's Asp109[1].
KI-ARv-03 (5 μM, 18 h) selectively suppressed AR-V7 transcripts in both VCaP-16 and 22Rv1 cells, an effect that translated to KLK3 downregulation only in VCaP-16 cells, with no impact on AR-FL[1].
KI-ARv-03 (0-10 μM, 48-72 h) exhibits dose-dependent anti-proliferative activity (GR₅₀ = 1.52 μM in MV-4-11; GR₅₀ = 3.26 μM in 22Rv1) and induces more robust apoptosis in MV-4-11 AML cells, suggesting a heightened susceptibility of hematological cancers to CDK9 inhibition[1].
KI-ARv-03 (0-40 μM, 1 h) directly engages CDK9 but not AR species, indicating it affects AR levels through impaired CDK9 enzymatic activity[1].
KI-ARv-03 (0.5-10 μM, 1-48 h) dose-dependently reduces RNA Pol II (pSer2/pSer7), and time-dependently depletes AR-FL, AR-V7 and AR (pSer81) levels in 22Rv1 cells, consistent with its role in CDK9-mediated transcriptional regulation of the AR locus[1].
KI-ARv-03 (5 μM, 6-24 h) triggers the depletion of AR protein through a proteasome-dependent pathway, as evidenced by rescue with MG132 (HY-13259), thereby linking CDK9 inhibition to AR protein stability[1].
KI-ARv-03 (0-10 μM, 72-120 h) dose-dependently inhibits the proliferation of MOLT-4, PSN-1, and RH-4 cells, with IC₅₀ values ranging from 279.2 nM to 9.99 μM[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
-
Cell Line:VCaP-16 and 22Rv1 cells
-
Concentration:5 μM
-
Incubation Time:18 h
-
Result:Dramatically decreased transcript levels of KLK3 (PSA) and AR-V7 in VCaP-16 cells.
Decreased AR-V7 transcript, while KLK3 transcript levels showed no significant reduction in 22Rv1 cells.
Transcript levels of AR-FL remained unchanged in both cell lines.
-
Cell Line:MV-4-11 and 22Rv1 cells
-
Concentration:10 μM top, 3.16-fold dilution
-
Incubation Time:48 h for MV-4-11, and 72 h for 22Rv1
-
Result:Moderately increased apoptotic cell counts at high doses (10 and 3 μM), while no apoptotic cells were produced at submicromolar doses.
-
Cell Line:MV-4-11 and 22Rv1 cells
-
Concentration:10 μM top, 3.16-fold dilution
-
Incubation Time:48 h for MV-4-11, and 72 h for 22Rv1
-
Result:Inhibited cell proliferation in a dose-dependent manner.
-
Cell Line:22Rv1 cells
-
Concentration:0.5, 2.5, 5 and 10 μM
-
Incubation Time:1, 2, 4, 6, 8, 24, and 48 h
-
Result:Significantly reduced phosphorylation of RNA Pol II at Ser2 and Ser7, even at low doses.
Significantly reduced AR-FL, AR-V7 protein levels and AR phosphorylation at Ser81 starting at 6 h, with complete depletion achieved after 16 h.
The depletion of AR protein was rescued by co-treatment with the proteasome inhibitor MG132 (10 μM).
Chemical Information
-
CAS No. 2416873-72-6
-
Molecular Weight 259.35
-
Formula C14H21N5
-
SMILES
CCCC1=NC2=CC=NN2C(N[C@H]3C[C@@H](CC3)N)=C1
-
Shipping
Room temperature in continental US; may vary elsewhere.
-
Storage
Please store the product under the recommended conditions in the Certificate of Analysis.
Purity & Documentation
References
[1]. Richters A, et al. Modulating Androgen Receptor-Driven Transcription in Prostate Cancer with Selective CDK9 Inhibitors. Cell Chem Biol. 2021 Feb 18;28(2):134-147.e14 [Content Brief]
[2]. Toure MA, et al. Targeted degradation of CDK9 potently disrupts the MYC-regulated network. Cell Chem Biol. 2025 Apr 17;32(4):542-555.e10. [Content Brief]
Calculators
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Powered by Bioz