Efaproxiral (RSR13) 是一种血红蛋白 (Hb)合成变构调节剂, 能降低血红蛋白氧 (O2) 的结合亲和力,增强放射处理中缺氧肿瘤的氧合作用。
生物活性 | Efaproxiral is ahaemoglobin (Hb)synthetic allosteric modifier, decreases Hb-oxygen (O2) binding affinity and enhances oxygenation of hypoxic tumours during radiation therapy[1]. |
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体外研究 (In Vitro) | Efaproxiral binds to only one pair of symmetry-related sites in the Hb central water cavity[2]. Efaproxiral readily crosses the red cell membrane in the presence of serum albumin solutions[2]. Efaproxiral is not inhibited from entering erythrocytes in the presence of an anion-channel blocking agent (DIDS)[2].
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体内研究 (In Vivo) | Efaproxiral (150 mg/kg, i.p.) increase tumor oxygenation,and increase the tumor growth inhibition of radiotherapy over 5 days of treatment[3]. Efaproxiral reduces hemoglobin-oxygen binding affinity, which facilitates oxygen release from hemoglobin into surrounding tissues and potentially increases the pO(2) of the tumors[4]
Animal Model: | Female C3H/HEJ mice (18–20 g), with radiation-induced fibrosarcoma tumor (RIF-1) cells xenograft[3] | Dosage: | 150 mg/kg | Administration: | Intraperitoneal injection; prior to X Irradiation (4 Gy/day), for 5 days | Result: | Significantly increased tumor oxygenation by 8.4 to 43.4 mmHg within 5 days, with maximum increases at 22–31 minutes after treatment. |
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运输条件 | Room temperature in continental US; may vary elsewhere. |
储存方式 | Powder | -20°C | 3 years | | 4°C | 2 years | In solvent | -80°C | 6 months | | -20°C | 1 month |
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溶解性数据 | In Vitro: DMSO : ≥ 150 mg/mL(439.37 mM) *"≥" means soluble, but saturation unknown. 配制储备液 1 mM | 2.9291 mL | 14.6456 mL | 29.2912 mL | 5 mM | 0.5858 mL | 2.9291 mL | 5.8582 mL | 10 mM | 0.2929 mL | 1.4646 mL | 2.9291 mL |
*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。 In Vivo: 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: 50%PEG300 50% saline Solubility: 27.5 mg/mL (80.55 mM); Clear solution; Need ultrasonic 2. 请依序添加每种溶剂: 10% DMSO 40%PEG300 5%Tween-80 45% saline Solubility: ≥ 2.08 mg/mL (6.09 mM); Clear solution
此方案可获得 ≥ 2.08 mg/mL (6.09 mM,饱和度未知) 的澄清溶液。 以 1 mL 工作液为例,取 100 μL 20.8 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。 3. 请依序添加每种溶剂: 10% DMSO 90% (20%SBE-β-CDin saline) Solubility: ≥ 2.08 mg/mL (6.09 mM); Clear solution
此方案可获得 ≥ 2.08 mg/mL (6.09 mM,饱和度未知) 的澄清溶液。 以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL20% 的 SBE-β-CD 生理盐水水溶液中,混合均匀。 4. 请依序添加每种溶剂: 10% DMSO 90%corn oil Solubility: ≥ 2.08 mg/mL (6.09 mM); Clear solution
此方案可获得 ≥ 2.08 mg/mL (6.09 mM,饱和度未知) 的澄清溶液,此方案不适用于实验周期在半个月以上的实验。 以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中,混合均匀。 *以上所有助溶剂都可在本网站选购。
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