2. Anti-infection Cell Cycle/DNA Damage
  3. CMV DNA/RNA Synthesis
  4. 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.

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Braco-19 Chemical Structure

Braco-19 Chemical Structure

CAS No. : 351351-75-2

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Based on 4 publication(s) in Google Scholar

Other Forms of Braco-19:

Braco-19 Related Antibodies

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  • Purity & Documentation

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Description

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 & Target

IC50: telomerase/telomere[1]
In Vitro

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 Related Antibodies

Cell Viability Assay[1]

Cell Line: HEK 293 cells
Concentration: 20 μM; 40 μM
Incubation Time: 24 hours
Result: Displayed low cytotoxicity and decreased the eGFP fluorescence.
In Vivo

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.

Animal Model: Established UXF1138LX Xenografts in nude mice[1]
Dosage: 2 mg/kg
Administration: Intraperitoneal injection; 3 weeks; starting 6 days after transplantation of UXF1138LX fragments
Result: Showed partial tumor regressions with an optimal T/C on day 28 of 4.1%, equal to 95.9% inhibition of tumor growth compared with control.
Molecular Weight

593.76

Formula

C35H43N7O2
CAS No.
Appearance

Solid

Color

Brown to orange

SMILES

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

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 33.33 mg/mL (56.13 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.6842 mL 8.4209 mL 16.8418 mL
5 mM 0.3368 mL 1.6842 mL 3.3684 mL
View the Complete Stock Solution Preparation Table

* 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.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
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Concentration
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Volume
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Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

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Volume (start)

V1

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Concentration (final)

C2

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Volume (final)

V2

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: 2.5 mg/mL (4.21 mM); Clear solution; Need ultrasonic

    This protocol yields a clear solution of 2.5 mg/mL.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: 2.5 mg/mL (4.21 mM); Clear solution; Need ultrasonic

    This protocol yields a clear solution of 2.5 mg/mL.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
% 
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation

Purity: 99.51%

COA (246 KB) HNMR (139 KB) RP-HPLC (162 KB)

Handling Instructions (2659 KB)
References

Complete Stock Solution Preparation Table

* 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.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 1.6842 mL 8.4209 mL 16.8418 mL 42.1046 mL
5 mM 0.3368 mL 1.6842 mL 3.3684 mL 8.4209 mL
10 mM 0.1684 mL 0.8421 mL 1.6842 mL 4.2105 mL
15 mM 0.1123 mL 0.5614 mL 1.1228 mL 2.8070 mL
20 mM 0.0842 mL 0.4210 mL 0.8421 mL 2.1052 mL
25 mM 0.0674 mL 0.3368 mL 0.6737 mL 1.6842 mL
30 mM 0.0561 mL 0.2807 mL 0.5614 mL 1.4035 mL
40 mM 0.0421 mL 0.2105 mL 0.4210 mL 1.0526 mL
50 mM 0.0337 mL 0.1684 mL 0.3368 mL 0.8421 mL
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Braco-19 Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Braco-19351351-75-2Braco19Braco 19CMVDNA/RNA SynthesisCytomegalovirustelomertelomeraseUXF1138LuteruscarcinomaHAdVG-quadruplexHuman AdenovirusAdenoviruseseGFPHEK 293Inhibitorinhibitorinhibit

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