ABT-263 Chemical Properties

Melting point:

114-116°C

Density 

1.41±0.1 g/cm3(Predicted)

storage temp. 

-20°C Freezer, Under Inert Atmosphere

solubility 

Soluble in DMSO (up to 25 mg/ml).

form 

solid

pka

4.60±0.10(Predicted)

color 

White

Stability:

Stable for 2 years from date of purchase as supplied. Solutions in DMSO may be stored at -20° for up to 3 months.

InChIKey

JLYAXFNOILIKPP-KXQOOQHDSA-N

SMILES

C(NS(C1=CC=C(N[C@@H](CSC2=CC=CC=C2)CCN2CCOCC2)C(S(C(F)(F)F)(=O)=O)=C1)(=O)=O)(=O)C1=CC=C(N2CCN(CC3CC(C)(C)CCC=3C3=CC=C(Cl)C=C3)CC2)C=C1

CAS DataBase Reference

923564-51-6

Safety Information

HS Code 

29339900

ABT-263 Usage And Synthesis

Description

ABT-263 (Navitoclax) is a potent inhibitor of Bcl-xL, Bcl-2 and Bcl-w with Ki of ≤ 0.5 nM, ≤1 nM and ≤1 nM in cell-free assays, but binds more weakly to Mcl-1 and A1. Phase 2.

In vitro

ABT-263 is structurally related to ABT-737; it is a disruptor of Bcl-2/Bcl-xL interactions with pro-apoptotic proteins. Overexpression of the prosurvival Bcl-2 family members is commonly associated with tumor maintenance, progression, and chemoresistance. [1] ABT-263 displays the protection afforded by overexpression of Bcl-2 or Bcl-xL with EC50 values of 60 nM and 20 nM, respectively. A wide range of cellular activity is observed with ABT-263 having a 50% growth inhibition (EC50) of 110 nM against the most sensitive line (H146), whereas its activity in the least sensitive line (H82) results in an EC50 at 22 μM. All four cell lines with EC50 values of <400 nM (H146, H889, H1963, and H1417) are also highly sensitive to ABT-737, and the two most resistant lines (H1048 and H82) are similarly resistant to ABT-263.

Description

ABT-263 (923564-51-6) is a potent and selective Bcl-2 family inhibitor / BH3 domain mimetic which binds to Bcl-2, Bcl-xL?and Bcl-w (Ki<1 nM). A useful tool compound which has shown interesting results in various cancer clinical trials.2?Synergizes with deoxyglucose and other agents, inducing apoptosis in cancer cells in a xenograft mouse model.3?A novel senolytic agent, inducing apoptosis preferentially in senescent cells in a cell type-restricted manner.4

Chemical Properties

Pale Yellow Solid

Uses

ABT-263 (Navitoclax) is a potent inhibitor of Bcl-xL, Bcl-2 and Bcl-w with Ki of ≤ 0.5 nM, ≤1 nM and ≤ 1 nM, respectively.

Uses

A novel inhibitor of antiapoptotic BCL-2 proteins; a new promising anticancer drug candidate.

Definition

ChEBI: Navitoclax is a N-sulfonylcarboxamide resulting from the formal condensation of the carboxy group of 4-{4-[(4'-chloro-4,4-dimethyl-3,4,5,6-tetrahydro[biphenyl]-2-yl)methyl]piperazin-1-yl}benzoic acid with the amino group of 4-{[(2R)-4-(morpholin-4-yl)-1-(phenylsulfanyl)butan-2-yl]amino}-3-[(trifluoromethyl)sulfonyl]benzenesulfonamide. It is a BH3-mimetic drug which targets the anti-apoptotic B-cell lymphoma-2 (BCL-2) family proteins, including BCL-2, BCL-xL, and BCL-w, and induces apoptosis in cancer cells. Currently under clinical investigation as treatment for solid tumors and hematologic malignancies. It has a role as a B-cell lymphoma 2 inhibitor, an apoptosis inducer and an antineoplastic agent. It is a member of piperazines, a member of monochlorobenzenes, a member of morpholines, an aryl sulfide, a N-sulfonylcarboxamide, a sulfone, an organofluorine compound, a secondary amino compound and a tertiary amino compound.

Mechanism of action

ABT‐263 exerts its senolytic activity in senescent tumor cells by inhibiting BCL‐XL's interaction with BAX. ABT‐263 is a BH3 mimetic that inhibits anti‐apoptotic BCL‐2 family proteins by impeding their ability to bind pro‐apoptotic proteins, such as BAK and BAX. BCL‐2 and BCL‐XL are the primary targets of ABT‐263 in cancer cells. 

Pharmacokinetics

The pharmacokinetic profile of ABT-263 is characterized by low plasma clearance values and low volumes of distribution in mice, rats, dogs, and monkeys, with plasma elimination half-lives after i.v. Dose of 4.6 to 8.4 hours. Bioavailability after oral gavage was ～20% in all four species. Due to its low aqueous solubility, ABT-263 displays a prolonged dissolution rate-limited oral absorption. P.o. administration in lipid-based formulations, in which the compound is significantly more soluble, yields enhanced absorption with bioavailability near 50% and an oral elimination half-life of 8.9 hours in dogs[5].

storage

Store at -20°C

References

1) Tse?et al.?(2008),?ABT-263: a potent and orally bioavailable Bcl-2 family inhibitor; Cancer Res.,?68?3421 2) Vogler?et al.?(2009),?Bcl-2 inhibitors: small molecules with a big impact on cancer therapy; Cell Death Differ.,?16?360 3) Yamaguchi?et al.?(2011),?Efficient elimination of cancer cells by deoxyglucose-ABT-263/737 combination therapy; PLoS ONE,?6(9)?e24102 4) Zhu?et al.?(2016),?Identification of a novel senolytic agent, navitoclax, targeting the Bcl-2 family of anti-apoptotic factors; Aging Cell,?15?428
[5] Tse, Christin et al. “Data from ABT-263: A Potent and Orally Bioavailable Bcl-2 Family Inhibitor.” 2023. 0.

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