.cp_wz tabla {borde superior: 1px sólido #ccc; borde izquierdo: 1px sólido #ccc; } .cp_wz table td {borde derecho: 1px sólido #ccc; borde inferior: 1px sólido #ccc; padding: 5px 0px 0px 5px;} .cp_wz table th {border-right: 1px solid #ccc; border-bottom: 1px solid #ccc; padding: 5px 0px 0px 5px;} \ n Peso molecular: 349.35 CP-466722 es un inhibidor de ATM potente y reversible, no afecta a ATR e inhibe a los miembros de la familia PI3K o PIKK en las células. \ n In vitro, CP-466722 se identifica como un inhibidor potencial para disminuir la actividad de la ATM quinasa purificada para fosforilar el sustrato GST-p53 (1-101). Además, CP-466722 también muestra las actividades inhibidoras contra las quinasas abl y src. En las células HeLa, CP-466722 a dosis de 6 μM, da como resultado la inhibición de la fosforilación dependiente de ATM al inhibir reversiblemente la actividad de la quinasa ATM inducida por radiación ionizante (IR). Además, la inducción de p53 dependiente de ATM también es inhibida por CP-466722 en células de cáncer de mama humano MCF-7 y fibroblastos humanos diploides primarios e inmortalizados. En respuesta a la IR, CP-466722 aumentó la proporción de células con contenido de ADN G2 / M y reduce la proporción de células con contenido de ADN en fase G1 en las células HeLa. La exposición transitoria a CP-466722 durante un período de 4 horas sensibiliza las células HeLa a los rayos infrarrojos sin afectar el recubrimiento celular ni la viabilidad celular. \ n Protocolo (solo como referencia) Ensayo de quinasa: [1]
|
In vitro kinase assays [1]
|
To screen for small molecule inhibitors of ATM kinase activity, an in vitro kinase assay is adapted, and an ELISA assay develops which measured the phosphorylation status of the ATM downstream target p53. Recombinant GST-p53(1-101) and full-length Flag-tagged ATM & ATR are purified for use in the ELISA and in vitro kinase assays. Briefly, Nunc 96 well Maxisorp plates are coated overnight (4 °C) with 2μg of purified, recombinant GST-p53(1-101) in PBS. All subsequent incubations are performed at room temperature. The plates are washed (0.05%v/v-Tween/PBS) before addition of purified recombinant full-length ATM kinase (30 ng–60 ng) in a final volume of 80μL of reaction buffer (20 mM HEPES, 50 mM NaCl, 10 mM MgCl2, 10 mM MnCl2, 1 mM DTT and 1 μM ATP) in the presence or absence of CP-466722. CP-466722 (10μM) is added to plates in duplicate and the kinase assay is incubated (90 minutes). Plates are washed (0.05%v/v-Tween/PBS), blocked (1hour, 1%w/v-BSA/PBS) and rinsed before anti-Phospho(Ser15)-p53 antibody (1:1000/PBS) is added to the plates and incubated (1hour). To reduce non-specific binding plates are washed (0.05%v/v-Tween/PBS) prior to incubation (1hour) with HRP-conjugated goat anti-rabbit IgG secondary antibody (1:5000/PBS). Secondary antibody that is linked to the phosphorylated GST-p53(1–101) protein is detected with TMB substrate reagent. Plates are developed (15 minutes–30 minutes) and the reaction is stopped (1 M H2SO4 final concentration) before absorbance is determined (λ450nm). CP-466722 that inhibits ATM kinase activity in ELISA assays, are characterized with respect to inhibition of ATM/ATR kinases using in vitro kinase assays. Western blotting using the anti-Phospho(Ser15)-p53 antibody is used as a readout of ATM/ATR inhibition. Extended analysis of CP466722 (10 μM) against a commercially available panel of kinases is performed by Upstate.
|
Ensayo celular: [1]
|
Cell lines
|
HeLa and A-T
|
|
Concentrations
|
0-6 μM
|
|
Incubation Time
|
4 hours
|
|
Method
|
HeLa or A-T (GM02052 expressing hTERT) cells are plated in triplicate and incubated for 24 hours. Cells are pre-treated: DMSO, CP466722 or KU55933 prior to IR (0-10Gy). Cells are incubated for 4 hours following IR before media is removed, cells washed (PBS), trypsinsed, counted and re-plated (2000 cells/plate, 10 cm plates) in the absence of drug and incubated for 10 days. Prior to colony counting, cells are washed (PBS), stained (PBS, 0.0037%v/v-formaldehyde, 0.1%w/v-crystal violet), rinsed (dH2O) and dried. Defined populations (>50 cells) are counted as one surviving colony, data are calculated as percentage surviving colonies relative to control plates +/− SE.
|
Conversión de diferentes modelos de animales basados en BSA (valor basado en datos del Borrador de Directrices de la FDA)
|
Species
|
Baboon
|
Dog
|
Monkey
|
Rabbit
|
Guinea pig
|
Rat
|
Hamster
|
Mouse
|
|
Weight (kg)
|
12
|
10
|
3
|
1.8
|
0.4
|
0.15
|
0.08
|
0.02
|
|
Body Surface Area (m2)
|
0.6
|
0.5
|
0.24
|
0.15
|
0.05
|
0.025
|
0.02
|
0.007
|
|
Km factor
|
20
|
20
|
12
|
12
|
8
|
6
|
5
|
3
|
|
Animal A (mg/kg) = Animal B (mg/kg) multiplied by
|
Animal B Km
|
|
Animal A Km
|
Por ejemplo, para modificar la dosis de resveratrol utilizada para un ratón (22,4 mg / kg) a una dosis basada en el BSA para una rata, multiplique 22,4 mg / kg por el factor Km para un ratón y luego divida por el factor Km para una rata. Este cálculo da como resultado una dosis equivalente para ratas de resveratrol de 11,2 mg / kg.
|
Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×
|
mouse Km(3)
|
= 11.2 mg/kg
|
|
rat Km(6)
|
\ n Información química
|
Molecular Weight (MW)
|
349.35
|
|
Formula
|
C17H15N7O2
|
|
CAS No.
|
1080622-86-1
|
|
Storage
|
3 years -20℃Powder
|
|
6 months-80℃in solvent (DMSO, water, etc.)
|
|
Synonyms
|
|
|
Solubility (25°C) *
|
In vitro
|
DMSO
|
0.28 mg/mL
(
|
|
Water
|
<1 mg/mL
(
|
|
Ethanol
|
<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.
|
|
Chemical Name
|
2-(6,7-dimethoxyquinazolin-4-yl)-5-(pyridin-2-yl)-2H-1,2,4-triazol-3-amine
|
Calculadora de molaridad Calculadora de dilución Calculadora de peso molecular
Grupos de Producto : PI3K / Akt / mTOR > Inhibidor ATM / ATR
