Home PI3K/Akt/mTOR PI3K inhibitor Taselisib (GDC 0032) For research use only.

Taselisib (GDC 0032)

Synonyms: RG7604

Taselisib (GDC 0032, RG7604) is a potent, next-generation β isoform-sparing PI3K inhibitor targeting PI3Kα/δ/γ with Ki of 0.29 nM/0.12 nM/0.97nM, >10 fold selective over PI3Kβ.

Taselisib (GDC 0032) Chemical Structure

Taselisib (GDC 0032) Chemical Structure

CAS No. 1282512-48-4

Purity & Quality Control

Taselisib (GDC 0032) Related Products

Signaling Pathway

PI3K Signaling Pathways

PI3K Signaling Pathway

Cell Data

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
human MOLM16 cells Proliferation assay 72 h Antiproliferative activity against human MOLM16 cells after 72 hrs by Cell Titer-Blue assay 22727640
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Biological Activity

Description Taselisib (GDC 0032, RG7604) is a potent, next-generation β isoform-sparing PI3K inhibitor targeting PI3Kα/δ/γ with Ki of 0.29 nM/0.12 nM/0.97nM, >10 fold selective over PI3Kβ.
Features A beta isoform-sparing PI3K inhibitor.
Targets
PI3Kδ [1]
(Cell-free assay)		 PI3Kα [1]
(Cell-free assay)		 PI3Kγ [1]
(Cell-free assay)		 PI3Kβ [1]
(Cell-free assay)		 C2β [1]
(Cell-free assay)		 Click to View More Targets
0.12 nM(Ki) 0.29 nM(Ki) 0.97 nM(Ki) 9.1 nM(Ki) 292 nM
In vitro
In vitro

GDC-0032 is an orally bioavailable, potent, and selective inhibitor of Class I PI3Kα, δ, and γ isoforms, with 30 fold less inhibition of the PI3K β isoform relative to the PI3Kα isoform. Preclinical data show that GDC-0032 has increased activity against PI3Kα isoform (PIK3CA) mutant and HER2-amplified cancer cell lines. GDC-0032 inhibits MCF7-neo/HER2 cells proliferation with IC50 of 2.5 nM. [1]
Kinase Assay Characterization of Biochemical and Cellular Activity in Vitro
Enzymatic activity of the class I PI3K isoforms is measured using a fluorescence polarization assay that monitors formation of the product 3,4,5-inositoltriphosphate molecule as it competes with fluorescently labeled PIP3 for binding to the GRP-1 pleckstrin homology domain protein. An increase in phosphatidyl inositide-3-phosphate product results in a decrease in fluorescence polarization signal as the labeled fluorophore is displaced from the GRP-1 protein binding site. Class I PI3K isoforms are expressed and purified as heterodimeric recombinant proteins. Tetramethylrhodamine-labeled PIP3 (TAMRA-PIP3), di-C8-PIP2, and PIP3 detection reagents are purchased from Echelon Biosciences. PI3Kα is assayed under initial rate conditions in the presence of 10 mM Tris (pH 7.5), 25 μM ATP, 9.75 μM PIP2, 5% glycerol, 4 mM MgCl2, 50 mM NaCl, 0.05% (v/v) Chaps, 1 mM dithiothreitol, and 2% (v/v) DMSO at 60 ng/mL. After assay for 30 min at 25 °C, reactions are terminated with a final concentration of 9 mM EDTA, 4.5 nM TAMRA-PIP3, and 4.2 μg/mL GRP-1 detector protein before reading fluorescence polarization on an Envision plate reader. IC50 values are calculated from the fit of the dose-response curves to a 4-parameter equation. Each reported value is an average of three experiments, and all have a standard deviation less than one geometric mean.
Experimental Result Images Methods Biomarkers Images PMID
Western blot Cyclin D1 / Cyclin E / Cleaved PARP / p-AKT / pPRAS40 / p-mTOR / pp70S6K / BRCA1 / c-Myc 27382432
Growth inhibition assay Cell viability 27382432
In Vivo
In vivo

GDC-0032 pharmacokinetics is approximately dose proportional and time independent with a mean t1/2 of 40 hours. The combination of GDC-0032 enhances activity resulting in tumor regressions and tumor growth delay (91% tumor growth inhibition (TGI)). In addition, the combination of GDC-0032 enhances the efficacy in vivo (102%TGI for GDC-0032). [1]
Animal Research Animal Models MCF7-neo/Her2 xenograft model
Dosages 1.4, 2.8, 5.8, 11.25, or 22.5 mg/kg
Administration oral
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT02785913 Completed
Recurrent Squamous Cell Lung Carcinoma|Stage IV Squamous Cell Lung Carcinoma
SWOG Cancer Research Network|National Cancer Institute (NCI)
 November 2014 Phase 2
NCT01967966 Completed
Healthy Volunteer
Genentech Inc.
 November 2013 Phase 1
NCT01814709 Completed
Healthy Volunteer
Genentech Inc.
 April 2013 Phase 1

Chemical Information & Solubility

Molecular Weight 460.53 Formula

C24H28N8O2
CAS No. 1282512-48-4 SDF Download Taselisib (GDC 0032) SDF
Smiles CC1=NN(C(=N1)C2=CN3CCOC4=C(C3=N2)C=CC(=C4)C5=CN(N=C5)C(C)(C)C(=O)N)C(C)C
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 70 mg/mL ( (151.99 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Ethanol : 7 mg/mL

Water : Insoluble


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In vivo
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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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