Molibresib (I-BET762; GSK525762) is aBET bromodomaininhibitor withIC₅₀of 32.5-42.5 nM.

IC50: 32.5-42.5 nM (BET)^[1]

Molibresib (I-BET 762) shows the highest affinity interaction with BET. Molibresib binds to the tandem bromodomains of BET with high affinity (dissociation constant K_dof 50.5-61.3 nM). Molibresib displaces, with high efficacy (half-maximum inhibitory concentration IC₅₀of 32.5-42.5 nM), a tetra-acetylated H4 peptide that had been pre-bound to tandem bromodomains of BET^[1]. Molibresib has high affinity for BD1/BD2 domain of BRD2/3/4 proteins. Molibresib treatment leads to a reduction in the recruitment of all three proteins to chromatin^[2]. Molibresib inhibits OPM-2 cell proliferation with IC₅₀of 60.15 nM^[3].

The antimyeloma activity of Molibresib (I-BET 762) is tested dosed orally in an in vivo systemic xenograft model generated by injecting OPM-2 cells into NOD-SCID mice. Daily oral doses of Molibresib up to 10 mg/kg and 30 mg/kg given every other day are well tolerated with no clear impact on body weight compared with vehicle control. The plasma hLC concentration is significantly reduced in mice treated with Molibresib^[3].

423.90

Solid

C₂₂H₂₂ClN₅O₂

1260907-17-2

Room temperature in continental US; may vary elsewhere.

DMSO : 200 mg/mL(471.81 mM;Need ultrasonic)

1M HCl : 100 mg/mL(235.90 mM;ultrasonic and adjust pH to 1 with HCl)

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80℃, 6 months; -20℃, 1 month。-80℃ 储存时，请在 6 个月内使用，-20℃ 储存时，请在 1 个月内使用。

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照In Vitro方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

• 1.

  请依序添加每种溶剂： 10% DMSO    40%PEG300   5%Tween-80   45% saline

  Solubility: ≥ 2.5 mg/mL (5.90 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (5.90 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。

  将 0.9 g 氯化钠，完全溶解于 100 mL ddH2O 中，得到澄清透明的生理盐水溶液
• 2.

  请依序添加每种溶剂： 5% DMSO    40%PEG300   5%Tween-80   50% saline

  Solubility: ≥ 2.5 mg/mL (5.90 mM); Clear solution
• 3.

  请依序添加每种溶剂： 5% DMSO    95% (20%SBE-β-CDin saline)

  Solubility: ≥ 2.5 mg/mL (5.90 mM); Clear solution
• 4.

  请依序添加每种溶剂： 1% DMSO    99% saline

  Solubility: ≥ 0.5 mg/mL (1.18 mM); Clear solution