UT-34

• CAT Number: I015469
• CAS Number: 2168525-92-4
• Molecular Formula: C15H12F4N4O2
• Molecular Weight: 356.27
• Purity: ≥95%
• Synonyms: (2S)-N-[4-cyano-3-(trifluoromethyl)phenyl]-3-(4-fluoropyrazol-1-yl)-2-hydroxy-2-methylpropanamide
• InChI: InChI=1S/C15H12F4N4O2/c1-14(25,8-23-7-10(16)6-21-23)13(24)22-11-3-2-9(5-20)12(4-11)15(17,18)19/h2-4,6-7,25H,8H2,1H3,(H,22,24)/t14-/m0/s1
• InChIKey: YDRMSDHDYRAUBR-AWEZNQCLSA-N
• SMILES: CC(CN1C=C(C=N1)F)(C(=O)NC2=CC(=C(C=C2)C#N)C(F)(F)F)O

UT-34 is a potent, selective and orally active second-generation pan-androgen receptor (AR) antagonist and degrader with IC50s of 211.7 nM, 262.4 nM and 215.7 nM for wild-type, F876L and W741L AR, respectively. UT-34 binds to ligand-binding domain (LBD) and function-1 (AF-1) domains and requires ubiquitin proteasome pathway to degrade the AR. UT-34 has anti-prostate cancer efficacy[1][2].
UT-34 (3-10 µM; 24 hours; LNCaP cells) treatment inhibits the expression of PSA and FKBP5 and growth of LNCaP cells starting from 100 nM with maximum effect observed at 10 μM[1].
UT-34 (0.1-10 µM; 24 hours; LNCaP cells) treatment results in a reduction of AR levels at 1000 nM in LNCaP cells[1].
Treatment of ZR-75-1 cells maintained in serum-containing growth medium with UT-34 results in downregulation of AR protein levels, but not estrogen receptor (ER) or progesterone receptor (PR) levels. Furthermore, in MDA-MB-453 breast cancer cells that express AR and glucocorticoid receptor (GR), UT-34 induces the downregulation of AR, but not GR[1].
UT-34 is an effective degrader of both AR and AR-V7. LNCaP-ARV7 cells are treated for 24 hours in the presence of 0.1 nM R1881 or 10 ng/mL Doxycycline. Doxycycline induces the expression of EDN2, which is inhibited by UT-34, while UT-34 inhibits the expression of R1881-induced FKBP5 gene expression[1].
UT-34 (20-40 mg/kg; oral administration; daily; for 14 days; NSG mice) at 20 and 40 mg/kg reduces the seminal vesicle weight by 10%-20% and 50%-60 %, respectively[1].
UT-34 inhibits androgen-dependent tissues such as prostate and seminal vesicles in rats, and the growth of Enzalutamide-resistant castration-resistant prostate cancer (CRPC) xenografts. UT-34 also induces tumor regression in intact immunocompromised rats[1].

Reference

[1]. Ponnusamy S, et al. Orally Bioavailable Androgen Receptor Degrader, Potential Next-Generation Therapeutic for Enzalutamide-Resistant Prostate Cancer. Clin Cancer Res. 2019 Nov 15;25(22):6764-6780.
 [Content Brief]

[2]. Stone L. UT-34: a promising new AR degrader. Nat Rev Urol. 2019 Nov;16(11):640.
 [Content Brief]