Catalog No.S1169

TGX-221 Chemical Structure

Molecular Weight(MW): 364.44

TGX-221 is a p110β-specific inhibitor with IC50 of 5 nM in a cell-free assay, 1000-fold more selective for p110β than p110α.

Size Price Stock Quantity  
In DMSO USD 123 In stock
USD 110 In stock
USD 370 In stock
USD 870 In stock
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5 Customer Reviews

  • A p110β-selective antagonist rescues increased protein synthesis in synaptic fractions from Fmr1 KO mice and in LCLs from a patient with FXS. (A–C) Treatment of synaptoneurosomes with TGX-221 (1 μmol/L, 30 min) reduces p110β-specific PI3K activity and phosphorylation of the downstream target AKT in both WT and Fmr1 KO SNS, shown by a radioactive PI3K assay and phosphoAkt- specific western blot-ting (A). (B) Quantification of PI3K activity using a competitive ELISA showed a significant reduction in PI3K activity in both genotypes after treatment [ n = 4, 2-way ANOVA, *P (genotype) = 0.0086, * P (treatment) = 0.0087, P (interaction) = 0.7154]. (C) Densitometric quantification of phosphoAkt-specific western blots showed a significant effect of treatment (C, n = 4, 2-way ANOVA, *P (treatment) = 0.0005, P (genotype) =0.372, P (interaction) = 0.4894).

    Mol Med 2012 18, 336-45. TGX-221 purchased from Selleck.

    (E) TGX-221 treatment (0.5 μmol/L, 30 min) of control and FXS LCLs reduces PI3K activity as shown by a radioactive PI3K assay of p110β-specific immunoprecipitates from LCL lysates, and decreases PI3K/mTOR down-stream signaling as shown by strongly reduced phosphorylation of S6 independently of the genotype. (F, G) Quantification demonstrates a significant, dose-dependent effect of TGX-221 treatment on PI3K activity [F, competitive ELISA, n = 4, 2-way ANOVA, *P (genotype) = 0.0079, *P (treatment) = 0.0258, P (interaction) = 0.9418], and on S6 phosphorylation[G, ELISA, n = 4, 2-way ANOVA, *P (genotype) = 0.013), *P (treatment) < 0.0001, P (interaction) = 0.195].

    Mol Med 2012 18, 336-45. TGX-221 purchased from Selleck.

  • (H) 30-min pretreatment of LCLs with 0.5 μmol/L TGX-221 significantly reduces protein synthesis in FXS patient cells [n = 40, 4 independent experiments, 2-way ANOVA: * P (genotype) < 0.001, * P (treatment) = 0.005, * P (interaction) < 0.001, Bon-ferroni post hocanalyses, * P = 0.001, #P = 0.002, ≠P = 0.02]. Example images are shown on the left: upper panel: signal for newly synthesized proteins (red), lower panel: overlay with tubulin staining (green). Scale bar is 20 μm. (I) Increasing concentrations of TGX-221 (5 μmol/L and 10 μmol/L) further reduce protein synthesis rates in FXS LCLs to healthy control levels.

    Mol Med 2012 18, 336-45. TGX-221 purchased from Selleck.

    We treated all of drugs in T47D which has a PI3KCA H1044R mutation with the concentration shown below for 1 hour and performed western blot analysis using antibodies to phospho-AKT(SERINE 472), and total AKT.



    Saraswati Sukumar of Johns Hopkins University School of Medicine. TGX-221 purchased from Selleck.

  • Breast cancer cells were pretreated with 100ng/ml EGF for 15 min and then treated with the indicated concentrations of TGX-221 for 24 hours.



    Dr. Zhang of Tianjin Medical University. TGX-221 purchased from Selleck.

Purity & Quality Control

Choose Selective PI3K Inhibitors

Biological Activity

Description TGX-221 is a p110β-specific inhibitor with IC50 of 5 nM in a cell-free assay, 1000-fold more selective for p110β than p110α.
p110β [5]
(Cell-free assay)
p110δ [5]
(Cell-free assay)
p110α [5]
(Cell-free assay)
p110γ [5]
(Cell-free assay)
C2α [5]
(Cell-free assay)
5 nM 0.1 μM 5 μM >10 μM >10 μM
In vitro

The activity of TGX-221 against different isoforms is measured in an in vitro PI3K assay using multiple preparations of recombinant p85/p110. TGX-221 show slow potent to p110δ with IC50 of 211 nM. Furthermore, TGX-221 partially attenuates insulin-induced phosphorylation of Ser473 of PKB in J774.2 macrophage cells. [1] TGX-221 inhibits platelet-ECC interaction, platelet aggregation and platelet-granulocyte binding in an extracorporeal circulation (ECC) model. [2] A recent study shows that after treatment with TGX-221 (0.2, 2, and 20 μM), PC3 cells show inhibition of proliferation with a significant reduction of the activity of the p110β PI3K isoform. [3]

Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
HUVECs MVzGeY5kfGmxbjDBd5NigQ>? M2jkcVUxOMLibl2= M4PIdVEhcA>? NVj0flA4TE2VTx?= MoLFdoVlfWOnczDBb5QheGixc4Doc5J6dGG2aX;u NH7Tbm4zOjhzNEG3NC=>
DU145 NEHwPWNIem:5dHigTY5pcWKrdHnvckBCe3OjeR?= Ml7lTWM2OD1|NT62JOKyKDBwMUKg{txO NV2yZWtuOjJ2OUS0OFQ>
PC3 NXjmO485T3Kxd4ToJGlvcGmkaYTpc44hSXO|YYm= MXnJR|UxRTF6LkKgxtEhOC56NTFOwG0> MkDSNlI1QTR2NES=
LNCaP MknOS5Jwf3SqIFnubIljcXSrb36gRZN{[Xl? MnL1TWM2OD1|Lkm4JOKyKDBwMUig{txO M4PRSFIzPDl2NES0

... Click to View More Cell Line Experimental Data

In vivo As an anti-thrombotic agent, TGX-221 at doses 1 + 1 (49 %) and 3+3 (88 %) improves integrated blood flow over 30 minutes in a mouse model. In addition, Tail bleeding time (BT) (sec) increases with TGX-221 doses of 3 + 3 (median 1560) and 1 + 1 (1305) and mean renal BT (sec) also increases in all TGX-221 groups. [4]


Kinase Assay:[1]
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Lipid kinase activity :

IC50 values are measured using a standard lipid kinase activity with PI as a substrate. (i)100 μM cold ATP is used instead of 10 μM, (ii) the DMSO concentration is 1%, and (iii) [γ-33P]ATP is used instead of [γ-32P]ATP. The TLC plates are quantified using a phosphorimager screen. The reported IC50 values are determined by non-linear regression analysis on the basis of at least three independent experiments repeated across multiple preparations of recombinant protein.
Cell Research:[3]
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  • Cell lines: PC3 cells
  • Concentrations: ~20 μM
  • Incubation Time: 24-72 hours
  • Method: For measurement of proliferation, cells are seeded in triplicate in 96-well culture plates and incubated overnight to allow cell attachment. The cells are incubated with TGX-221 for 24, 48, and 72 hours. At designated time intervals, cells are quantified by a crystal violet staining-based colorimetric assay. Briefly, cells are fixed by addition of 100 μl of 2.5% glutaraldehyde solution and incubated at room temperature for 30 minutes. Plates are washed three times by submersion in PBS solution. Plates are air-dried and stained by addition of 100 μL of 0.1% solution of crystal violet dissolved in deionized water and incubated for 20 minutes at room temperature, excess dye is removed by extensive washing with deionized water, and plates are air-dried prior to bound dye solubilization in 100 μL of 10% acetic acid. The optical density of dye extracts is measured directly in plates using a microplate reader at 570 nm.
    (Only for Reference)
Animal Research:[3]
+ Expand
  • Animal Models: FeCl3-induced arterial thrombosis in mice
  • Formulation: TGX-221 is dissolved in 10% ethanol, 10% cremaphor, 10% N,N-dimethylacetamine, 70% distilled water.
  • Dosages: 0.3 + 0.3, 1 + 1, 3 + 3 mg/kg + mg/kg/hour
  • Administration: Administered via i.v.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 12 mg/mL (32.92 mM)
Water Insoluble
Ethanol Insoluble
In vivo Add solvents individually and in order:
1% DMSO+30% polyethylene glycol+1% Tween 80
30 mg/mL

* 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.

Chemical Information

Molecular Weight 364.44


CAS No. 663619-89-4
Storage powder
in solvent
Synonyms N/A

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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.

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID