Braco-19 

Braco-19 is a potent telomerase/telomere inhibitor, preventing the capping and catalytic action of telomerase. Braco-19 acts as G-quadruplex (GQ) binding ligand, stabilizing G-quadruplexes formation at the 3V telomeric DNA overhang and produce rapid senescence or selective cell death. Braco-19 is also a HAdV virus replication inhibitor^[1][2].

IC50: telomerase/telomere^[1]

Braco-19, as a well-known GQ binding ligand, interacts specifically with the HAdV GQs and increases their stability, and blocks the HAdV multiplication^[2].
BRACO-19 (1.0-10 μM; 5 day) cause zero growth inhibition is found 1 μM, the IC₅₀ for BRACO-19 in UXF1138L cells is 2.5 μM, the IC₁₀₀ is 5 μM^[1].
BRACO-19 (1 μM; 24 hours) shows dramatically reduced nuclear hTERT expression. However, residual cytoplasmic hTERT staining is observed accompanied by the occurrence of atypical mitoses^[1].
BRACO-19 (0-40 μM; 24 hours) decreases the AdV virus growth in a dose-dependent manner in eGFP-transinfected HEK 293 cells^[2].
BRACO-19 (0-150 μM; 24 hours) shows a decrease in band intensity in an increasing concentration-dependent manner^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

BRACO-19 (oral administration or intraperitoneal injection; 2 or 5 mg/kg; 3 weeks) oral dosing regimen are always inactive and the animals have to be sacrificed due to high tumor burden before overall termination of the study, Chronic, i.p. BRACO-19 administration, qdx5 is efficient in inhibiting tumor growth in earlystage xenografts but not advanced-stage xenografts^[1].
BRACO-19 (intraperitoneal injection; 2 mg/kg; 3 weeks; starting 6 days after transplantation of UXF1138LX fragments) inhibits tumor growth significantly and under these conditions, marked single-agent antitumor activity is observed, with some animals in the group showing complete regressions (5 of 12 tumors)^[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

593.76

C₃₅H₄₃N₇O₂

351351-75-2

Solid

Brown to orange

CN(C1=CC=C(NC2=C(C=CC(NC(CCN3CCCC3)=O)=C4)C4=NC5=CC(NC(CCN6CCCC6)=O)=CC=C52)C=C1)C

Room temperature in continental US; may vary elsewhere.

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

• [1]. Angelika M Burger, et al. The G-quadruplex-interactive Molecule BRACO-19 Inhibits Tumor Growth, Consistent With Telomere Targeting and Interference With Telomerase Function. Cancer Res. 2005 Feb 15;65(4):1489-96.  [Content Brief]

  [2]. Prativa Majee, et al. Genome-wide Analysis Reveals a Regulatory Role for G-quadruplexes During Adenovirus Multiplication. Virus Res. . 2020 Jul  [Content Brief]