2. Cell Cycle/DNA Damage Apoptosis
  3. Telomerase Apoptosis
  4. BIBR 1532

BIBR 1532 is a potent, selective and non-competitive telomerase inhibitor with IC50 of 100 nM in a cell-free assay.

For research use only. We do not sell to patients.

BIBR 1532 Chemical Structure

BIBR 1532 Chemical Structure

CAS No. : 321674-73-1

Size Price Stock Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 119 In-stock
Solution
10 mM * 1 mL in DMSO USD 119 In-stock
Solid
1 mg USD 28 In-stock
5 mg USD 69 In-stock
10 mg USD 108 In-stock
25 mg USD 248 In-stock
50 mg USD 420 In-stock
100 mg USD 660 In-stock
200 mg   Get quote  
500 mg   Get quote  

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Customer Review

Based on 5 publication(s) in Google Scholar

BIBR 1532 Related Antibodies

Top Publications Citing Use of Products

  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

BIBR 1532 is a potent, selective and non-competitive telomerase inhibitor with IC50 of 100 nM in a cell-free assay.

IC50 & Target

IC50: 100 nM (telomerase)
In Vitro

BIBR 1532 non-competitively inhibits telomerase activity[1]. BIBR 1532 inhibits the proliferation of JVM13 leukemia cells with an IC50 of 52 μM, and similar effect also occurs in other leukemia cell lines such as Nalm-1, HL-60, and Jurkat. BIBR 1532 exerts antiproliferative effect on acute myeloid leukemia (AML) with IC50 of 56 μM with no effect on the proliferative capacity of normal hematopoietic progenitor cells[2]. BIBR 1532 (2.5 μM) reduces colony-forming ability, induces telomere length shortening and causes chemotherapeutic sensitization via inhibiting telomerase activity in MCF-7/WT and melphalan-resistant MCF-7/MlnR cell lines[3]. BIBR 1532 is cytotoxic in a dose-dependent manner in T-cell prolymphocytic leukemia (T-PLL)[4]. BIBR 1532 in combination with carboplatin (a chemotherapeutic agent) eliminates ovarian cancer spheroid-forming cells in ES2, SKOV3, and TOV112D cell lines[5].

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

BIBR 1532 Related Antibodies
Molecular Weight

331.36

Formula

C21H17NO3
CAS No.
Appearance

Solid

Color

White to light yellow

SMILES

O=C(O)C1=CC=CC=C1NC(/C=C(C2=CC=C3C=CC=CC3=C2)\C)=O
Shipping

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

DMSO : ≥ 100 mg/mL (301.79 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.0179 mL 15.0893 mL 30.1787 mL
5 mM 0.6036 mL 3.0179 mL 6.0357 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

  • Molarity Calculator

  • Dilution Calculator

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

Mass
=
Concentration
×
Volume
×
Molecular Weight *

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

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
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 (7.54 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    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% Corn Oil

    Solubility: ≥ 2.5 mg/mL (7.54 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL Corn oil, and mix evenly.

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: 99.86%

COA (248 KB) LCMS (97 KB)

Handling Instructions (2659 KB)
References
Kinase Assay
[1]

For the direct telomerase assay with the endogenous telomerase, 10 μL of telomerase-enriched extract is mixed with different concentrations of BIBR1532 in a final volume of 20 μL. After 15-minute preincubation on ice, 20 μL of the reaction mixture is added, and the reaction is initiated by transferring the tubes to 37°C. The final concentrations in the reaction mixture are 25 mM Tris-Cl (pH 8.3), 1 mM MgCl2, 1 mM EGTA, 1 mM dATP, 1 mM dTTP, 6.3 μM cold dGTP, 15 μCi [α-32P]dGTP (3000 Ci/mmol; NEN), 1.25 mM spermidine, 10 units of RNasin, 5 mM 2-mercaptoethanol, and 2.5 μM TS-primer (5'-AATCCGTCGAGCAGAGTT). For the recombinant enzyme, 1-7 μL of affinity-purified telomerase (containing less than 0.025 μM hTERT) are assayed in a final volume of 40 μL containing 50 mM Tris acetate (pH 8.5), 50 mM KCl, 1 mM MgCl2, 1 mM spermidine, 5 mM 2-mercaptoethanol, 1 mM dATP, 1 mM dTTP, 2.5 μM dGTP, 15 μCi of [α-32P]dGTP (3000 Ci/mmol) and 2.5 μM (TTAGGG)3. The reaction is initiated by incubation at 37°C for 2 hours and stopped by addition of 50 μL of RNase mix (0.1 mg/mL RNaseA-100 u/mL RNaseT1 in 10 mM Tris-Cl (pH 8.3) and 20 mm EDTA) and incubation for 20 min at 37°C. Samples are deproteinated by adding 50 μL of 0.3 mg/m proteinase K in 10 mM Tris-Cl (pH 8.3) and 0.5% w/v SDS, for a 30-minute incubation at 37°C. DNA is recovered by phenol extraction and ethanol precipitation, and the extension products are analyzed on an 8% (endogenous telomerase) or 12% (recombinant telomerase) polyacrylamide-urea gel. Dried gels are exposed to a Kodak phosphorimager screen, and the results are analyzed.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Cell Assay
[1]

Cells are plated as triplicates in complete RPMI 1640 medium with various concentrations of BIBR1532. After 24 to 72 hours, water-soluble tetrazolium (WST-1) is added, which is transformed into formazan by mitochondrial reductase systems. The increase in the number of viable cells results in an increase of activity of mitochondrial dehydrogenases, leading to an increase of formazan dye formed, which is quantified by ELISA reader after 2, 3, and 4 hours of incubation.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.
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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 3.0179 mL 15.0893 mL 30.1787 mL 75.4466 mL
5 mM 0.6036 mL 3.0179 mL 6.0357 mL 15.0893 mL
10 mM 0.3018 mL 1.5089 mL 3.0179 mL 7.5447 mL
15 mM 0.2012 mL 1.0060 mL 2.0119 mL 5.0298 mL
20 mM 0.1509 mL 0.7545 mL 1.5089 mL 3.7723 mL
25 mM 0.1207 mL 0.6036 mL 1.2071 mL 3.0179 mL
30 mM 0.1006 mL 0.5030 mL 1.0060 mL 2.5149 mL
40 mM 0.0754 mL 0.3772 mL 0.7545 mL 1.8862 mL
50 mM 0.0604 mL 0.3018 mL 0.6036 mL 1.5089 mL
60 mM 0.0503 mL 0.2515 mL 0.5030 mL 1.2574 mL
80 mM 0.0377 mL 0.1886 mL 0.3772 mL 0.9431 mL
100 mM 0.0302 mL 0.1509 mL 0.3018 mL 0.7545 mL
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BIBR 1532 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:

BIBR 1532321674-73-1BIBR1532BIBR-1532TelomeraseApoptosisInhibitorinhibitorinhibit

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