PF-4708671

Modify Date: 2024-01-02 07:07:12

PF-4708671 Structure
PF-4708671 structure
Common Name PF-4708671
CAS Number 1255517-76-0 Molecular Weight 390.405
Density 1.3±0.1 g/cm3 Boiling Point 572.8±50.0 °C at 760 mmHg
Molecular Formula C19H21F3N6 Melting Point N/A
MSDS Chinese USA Flash Point 300.2±30.1 °C
Symbol GHS06
GHS06
Signal Word Danger

 Use of PF-4708671


PF-4708671 is a potent cell-permeable S6K1 inhibitor with a Ki of 20 nM and IC50 of 160 nM.

 Names

Name 2-[[4-(5-ethylpyrimidin-4-yl)piperazin-1-yl]methyl]-6-(trifluoromethyl)-1H-benzimidazole
Synonym More Synonyms

 PF-4708671 Biological Activity

Description PF-4708671 is a potent cell-permeable S6K1 inhibitor with a Ki of 20 nM and IC50 of 160 nM.
Related Catalog
Target

S6K1:160 nM (IC50)

S6K1:20 nM (Ki)

S6K2:65 μM (IC50)

In Vitro PF-4708671 inhibits the activity of full-length S6K1 in vitro with a Ki of 20 nM, and S6K1 isolated from IGF1-stimulated HEK293 cells with an IC50 of 0.16 μM, and only inhibits very weakly the closely related S6K2 isoform (IC50 of 65 μM). PF-4708671 inhibits RSK1 (IC50 of 4.7 μM) and RSK2 (IC50 of 9.2 μM) over 20-fold less potently than S6K1. PF4708671 inhibits MSK1 (IC50 of 0.95 μM) 4-fold more weakly than S6K1[1]. HCT116 cells are treated with (i) vehicle (DMSO), (ii) OSI-906 (5 μM), (iii) PF-4708671 (10 μM), and (iv) OSI-906 (5 μM)+PF-4708671 (10 μM) for various amounts of time. HCT116 cells treated with OSI-906 alone (closed square) or PF4708671 alone (open circle) slightly inhibit cell growth. In contrast, proliferation in HCT116 cells is significantly inhibited after a 2-day treatment with the combination of OSI-906 and PF-4708671 (closed circle). A similar result is also observed when SW480 cells are treated with the combination of OSI-906 and PF-4708671. Colony formation also significantly reduces in OSI-906+PF-4708671-treated cells comparing with vehicle, OSI-906 alone, or PF-4708671 alone treated HCT116 or SW480 cells[2].
In Vivo The tumor growth rate in mice treated with the combination of OSI-906+PF-4708671 is significantly slower than that of OSI-906 alone (P=0.0189) or PF4708671 alone (P=0.0165) treated mice. The average tumor volume in the OSI-906+PF-4708671-treated mice is approximately 50% of that in mice treated with OSI-906 (P=0.0056) or PF-4708671 alone (P<0.001) at the end of a 15-day treatment[2].
Cell Assay GEO, HT29, SW480, and HCT116 cells are used. The effects of OSI-906 or the combination of OSI-906 and PF-4708671 on cell proliferation is determined with XTT and clonogenic assays. XTT assays are performed using the Cell Proliferation Kit II (XTT). For clonogenic assays, cells (1×103 cells/well) are seeded on a 6-well plate and subsequently treated with drugs (OSI-906 5 μM, PF-4708671 10 μM). After 1 week of incubation, cells are stained with 1% crystal violet, and the number of colonies is counted and recorded[2].
Animal Admin Mice[2] Five- to 6-week-old female athymic nude mice (Hsd:Athymic Nude-Foxn1nu) are randomly assigned to the following groups (5 mice/group). For injection of HT29-L and HT29-P cells, mice are treated with vehicle (25 mM tartaric acid) or OSI-906 (30 mg/kg) for 12 days. For injection of HCT116 cells, mice are treated with (i) vehicle (25 mM tartaric acid); (ii) OSI-906 alone (30 mg/kg); (iii) PF-4708671 alone (60 mg/kg); and (iv) OSI-906 (30 mg/kg)+PF-4708671 (60 mg/kg) and treated with drugs orally for 14 days. Vehicle and OSI-906 are given once per day and PF-4708671 is given once every other day. Twenty-four hours after the last treatment, the mice are sacrificed and the tumor weights were measured[2].
References

[1]. Pearce LR, et al. Characterization of PF-4708671, a novel and highly specific inhibitor of p70 ribosomal S6 kinase (S6K1). Biochem J. 2010 Oct 15;431(2):245-55.

[2]. Zhang Y, et al. Inhibition of p70S6K1 Activation by Pdcd4 Overcomes the Resistance to an IGF-1R/IR Inhibitor in Colon Carcinoma Cells. Mol Cancer Ther. 2015 Mar;14(3):799-809.

 Chemical & Physical Properties

Density 1.3±0.1 g/cm3
Boiling Point 572.8±50.0 °C at 760 mmHg
Molecular Formula C19H21F3N6
Molecular Weight 390.405
Flash Point 300.2±30.1 °C
Exact Mass 390.177979
PSA 60.94000
LogP 3.20
Appearance of Characters off-white
Vapour Pressure 0.0±1.6 mmHg at 25°C
Index of Refraction 1.609
Storage condition Store at +4°C
Water Solubility DMSO: ≥20mg/mL

 Safety Information

Symbol GHS06
GHS06
Signal Word Danger
Hazard Statements H301
Precautionary Statements P301 + P310
Hazard Codes T
Risk Phrases 25
Safety Phrases 45
RIDADR UN 2811 6.1 / PGIII

 Precursor & DownStream

Precursor  2

DownStream  0

 Synonyms

1H-Benzimidazole, 2-[[4-(5-ethyl-4-pyrimidinyl)-1-piperazinyl]methyl]-5-(trifluoromethyl)-
QC-8396
HMS3263P20
5FI
1H-Benzimidazole (2-[[4-(5-ethyl-4-pyrimidinyl)-1-piperazinyl]methyl]-6-(trifluoromethyl)
2-{[4-(5-Ethyl-4-pyrimidinyl)-1-piperazinyl]methyl}-5-(trifluoromethyl)-1H-benzimidazole
2-((4-(5-Ethylpyrimidin-4-yl)piperazin-1-yl)methyl)-5-(trifluoromethyl)-1H-benzo[d]imidazole
PF-4708671
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