A66 化学構造
分子量: 393.53

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製品説明

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製品の説明

生物活性

製品説明 A66は、32nMのIC50による強力で特定のPI3K p110α阻害剤です。
ターゲット p110α
IC50 32 nM [1]
In vitro試験 In addition to the wild-type p110α, A66 also potently inhibits the oncogenic forms of p110α such as p110α E545K and p110α H1047R with IC50 of 30 nM and 43 nM, respectively. Unlike PIK-75, A66 displays >100 fold selectivity for p110α over other class-I PI3K isoforms. Among the class-II PI3Ks, class-III PI3K and PI4Ks, A66 only exhibits limited cross-reactivity with the class-II PI3K PI3KC2β and the PI4Kβ isoform of PI4K with IC50 of 462 nM and 236 nM, respectively. A66 exhibits no inhibitory activity against other lipid kinases or the related kinases DNA-PK and mTOR. A66 has a higher degree of specificity compared with PIK-75 when tested at 10 μM against two large panels of 110 protein kinases and 318 kinases. Inhibition of p110α alone by A66 treatment is sufficient to block insulin signalling to Akt/PKB in certain cell lines that harbor H1047R mutations in PIK3CA and have high levels of p110α and class-Ia PI3K activity. [1] A66 treatment at 0.7 μM induces a 75-80% reduction in focus formation by the highly transforming p85α iSH2 mutants KS459delN, DKRMN-S560del, and K379E, and reduces the phosphorylation of Akt on T308 by all p85 mutants. [2]
In vivo試験 A single dose of A66 at 100 mg/kg induces a profound reduction in the phosphorylation of Akt/PKB and p70 S6 kinase, but not of ERK, in SK-OV-3 tumour tissue in vivo at both 1 hour and 6 hours after dosing. A66 dosed at 100 mg/kg once daily (QD) for 21 days or 75 mg/kg twice daily (BID) for 16 days induces a significant delay in growth of SK-OV-3 xenografted tumors with average TGI of 45.9% and 29.9%, respectively, which is even greater than that induced by the well-established pan-PI3K inhibitor BEZ-235. QD dosing of A66 in the HCT-116 xenograft model also induces a significant reduction in tumour volume with TGI of 77.2%, but causes a non-significant reduction in tumor volume in the U87MG xenograft model. [1] Administration of A66 at 10 mg/kg in male CD1 mice induces significant impairments in the ITT (insulin tolerance test) and GTT (glucose tolerance test), and an increase in glucose production during a PTT (pyruvate tolerance test), almost to the same level as the pan-PI3K inhibitors. [3]
臨床試験
特集 Highly selective for the p110α isoform.

プロトコル (参考用のみ)

キナーゼアッセイ: [1]

PI3K (human) HTRF Assay The p110α isoform is produced in-house by co-expressing full-length human p85α with the indicated human full-length catalytic subunit containing a histidine tag at the N-terminus to allow purification. The p110α is titrated and used at a concentration between EC65-EC80 values. IC50 value is evaluated using the PI3K (human) HTRF Assay.

動物実験: [1]

動物モデル Age-matched specific pathogen-free Rag1-/- or NIH-III mice inoculated subcutaneously with U87MG, SK-OV-3 or HCT-116 cells
製剤 Formulated in 20% 2-hydroxypropyl-β-cyclodextrin in water
投薬量 100 mg/kg once daily (QD) or 75 mg/kg twice daily (BID)
投与方法 Intraperitoneal injection

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

SpeciesMouseRatRabbitGuinea pigHamsterDogMonkeyBaboon
Weight (kg)0.020.151.80.40.0810312
Body Surface Area (m2)0.0070.0250.150.050.020.50.240.6
Km factor361285201220
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×  mouse Km(3)  = 11.2 mg/kg
rat Km(6)
1

参考

化学情報

Download A66 SDF
分子量 393.53
化学式

C17H23N5O2S2

CAS No. 1166227-08-2
保管 2年-20℃
6月-80℃in solvent
別名 N/A
溶解度 (25°C) * In vitro DMSO 79 mg/mL (200.74 mM)
エタノール 1 mg/mL (2.54 mM)
<1 mg/mL (<1 mM)
In vivo 15% Captisol 8 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.
化学名 (2S)-N1-(5-(2-tert-butylthiazol-4-yl)-4-methylthiazol-2-yl)pyrrolidine-1,2-dicarboxamide

文献中の引用 (10)

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
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