Alobresib (GS-5829)

Catalog No.S8961 Batch:S896101

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Technical Data

Formula

C26H23N5O2
Molecular Weight 437.49 CAS No. 1637771-14-2
Solubility (25°C)* In vitro DMSO 87 mg/mL (198.86 mM)
Ethanol 11 mg/mL (25.14 mM)
Water ˂1 mg/mL
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

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Biological Activity

Description Alobresib (GS-5829) is a novel BET inhibitor that represents a highly effective therapeutics agent against recurrent/chemotherapy-resistant USC-overexpressing c-Myc. Alobresib (GS-5829) inhibits CLL cell proliferation and induces leukemia cell apoptosis through deregulation of key signaling pathways, such as BLK, AKT, ERK1/2, and MYC. Alobresib (GS-5829) also inhibits NF-κB signaling.
Targets
BET [1] BLK [2] Akt [2] ERK1/2 [2] MYC [2] View More
In vitro

In-vitro experiments demonstrates high sensitivity of USC cell-lines to the exposure to GS-5829 causing a dose-dependent decrease in the phosphorylated levels of c-Myc and a dose-dependent increase in caspase activation (apoptosis).[1] GS-5829 inhibits CLL cell proliferation and induces leukemia cell apoptosis through deregulation of key signaling pathways, such as BLK, AKT, ERK1/2, and MYC. IκBα modulation indicates that GS-5829 also inhibits NF-κB signaling. GS-5829-induced apoptosis results from an imbalance between positive (BIM) and negative regulators (BCL-XL) of the intrinsic apoptosis pathway.[2]
In vivo

GS-5829 has impressive activity against USC primary tumors as well as USC xenografts. Assessment of c-Myc expression in tumors exposed to the GS-5829 demonstrates down-regulation of both total and phospho c-Myc proteins. GS-5829 demonstrates excellent bioavailability after oral administration and is significantly more effective than JQ1 at the doses used in comparative experiments in vivo against USC xenografts. Clinical studies with GS-5829 in USC patients harboring disease resistant to standard salvage chemotherapy are warranted.[1]

Protocol (from reference)

Cell Assay:

[2]
  • Cell lines

    PBMC, MEC-1

  • Concentrations

    100 nM, 200 nM, 400 nM, 800 nM

  • Incubation Time

    72 h, 24 h

  • Method

    TACS XTT cell proliferation/viability assay (Trevigen) is performed according to the manufacturer’s instructions on MEC-1 cells treated with GS-5829 or the BCR signaling inhibitors for 72 h. Half-maximal inhibitory concentrations (IC50) are calculated using Prism 6 or 7 based on technical triplicate measurements.
Animal Study:

[1]
  • Animal Models

    female CB17/lcrHsd-Prkd/scid mice bearing USC-ARK1 or USC-ARK2 xenograft

  • Dosages

    20 mg/kg, 10 mg/kg

  • Administration

    Oral gavage

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.