RI-2

Optimized reversible RAD51 inhibitor CAS# 1417162-36-7

RI-2

Catalog No. BCC6424----Order now to get a substantial discount!

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Chemical structure

RI-2

3D structure

Chemical Properties of RI-2

Cas No. 1417162-36-7 SDF Download SDF
PubChem ID 71547138 Appearance Powder
Formula C21H18Cl2N2O4 M.Wt 433.28
Type of Compound N/A Storage Desiccate at -20°C
Solubility DMSO : 15.5 mg/mL (35.77 mM; Need ultrasonic and warming)
Chemical Name 1-(3,4-dichlorophenyl)-3-(4-methoxyphenyl)-4-morpholin-4-ylpyrrole-2,5-dione
SMILES COC1=CC=C(C=C1)C2=C(C(=O)N(C2=O)C3=CC(=C(C=C3)Cl)Cl)N4CCOCC4
Standard InChIKey JMPJNNOSVCHYOU-UHFFFAOYSA-N
Standard InChI InChI=1S/C21H18Cl2N2O4/c1-28-15-5-2-13(3-6-15)18-19(24-8-10-29-11-9-24)21(27)25(20(18)26)14-4-7-16(22)17(23)12-14/h2-7,12H,8-11H2,1H3
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of RI-2

DescriptionRI-2 is a reversible RAD51 inhibitor, with an IC50 of 44.17 μM, and specifically inhibits homologous recombination repair in human cells.In Vitro:RI-2 (7a) is a reversible RAD51 inhibitor, with an IC50 of 44.17 μM. RI-2 specifically inhibits homologous recombination repair in human cells. RI-2 (150 μM) induces a significant sensitization of cells[1].

References:
[1]. Budke B, et al. An optimized RAD51 inhibitor that disrupts homologous recombination without requiring Michael acceptor reactivity. J Med Chem. 2013 Jan 10;56(1):254-63.

Protocol

Cell Assay [1]
HEK293 cells are plated into 96-well tissue culture plates at a density of 300 cells per well in the presence or absence of 50 nM mitomycin C (MMC) for 24 hours at 37°C, 5% CO2. Media is subsequently replaced with fresh media containing 0.5% DMSO plus RI-2 for an additional 24 hours. RI-2 is then removed, and cultures are allowed to grow to a 50-70% confluence. Average survival from at least three replicates is measured using CellGlo reagentor. RI-2 is deemed successful in sensitizing cells to MMC if they generate significantly greater toxicity in the presence of MMC relative to the absence of MMC. Specifically, sensitization is scored as a “+” when non-overlapping standard errors are observed for at least two pairs of compound doses[1].

References:
[1]. Budke B, et al. An optimized RAD51 inhibitor that disrupts homologous recombination without requiring Michael acceptor reactivity. J Med Chem. 2013 Jan 10;56(1):254-63.

RI-2 Dilution Calculator

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RI-2 Molarity Calculator

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Preparing Stock Solutions of RI-2

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 2.308 mL 11.5399 mL 23.0798 mL 46.1595 mL 57.6994 mL
5 mM 0.4616 mL 2.308 mL 4.616 mL 9.2319 mL 11.5399 mL
10 mM 0.2308 mL 1.154 mL 2.308 mL 4.616 mL 5.7699 mL
50 mM 0.0462 mL 0.2308 mL 0.4616 mL 0.9232 mL 1.154 mL
100 mM 0.0231 mL 0.1154 mL 0.2308 mL 0.4616 mL 0.577 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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Background on RI-2

Description:

IC50: 44.17 μM

Homologous recombination (HR) is an essential process in cells that provides repair of DNA double-strand breaks and lesions that block DNA replication. RAD51 is an evolutionarily conserved protein that is central to HR. Overexpression of RAD51 protein is common in cancer cells and represents a potential therapeutic target in oncology. RI-2 is an optimized reversible RAD51 inhibitor.

In vitro: Although RI-2 did exhibit reduced activity relative to RI-1, it did retain enough activity to sensitize cells to MMC cell-based assays. RI-2 exhibited no reactivity toward glutathione after incubation for 24 hours. RAD51 protein that had been treated with RI-2 prior to washing exhibited no measurable loss of DNA binding activity, even though RI-2 is known to inhibit RAD51 with an IC50 of 44.17 μM. This indicates that RAD51 inhibition by RI-2 is fully reversible [1].

In vivo: RI-1, the analogue of RI-2, facilitated mapping of the binding pocket within known crystal structures of RAD51. However, this reactivity of RI-1 potentially may limit its development in pre-clinical animal models. RI-1 has been found to exhibit a relatively short half-life, due to reactivity in thiol-containing solutions [1].

Clinical trial: Up to now, RI-2 is still in the preclinical development stage.

Reference:
[1] Budke B, Kalin JH, Pawlowski M, Zelivianskaia AS, Wu M, Kozikowski AP, Connell PP.  An optimized RAD51 inhibitor that disrupts homologous recombination without requiring Michael acceptor reactivity. J Med Chem. 2013 Jan 10;56(1):254-63.

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RI-2 is a reversible RAD51 inhibitor, with an IC50 of 44.17 μM, and specifically inhibits homologous recombination repair in human cells.

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