Eravacycline dihydrochloride (TP-434 dihydrochloride) is a potent and broad-spectrumantibacterialagent.

Eravacycline is potent antibiotic againstA. baumannii, including isolates that are resistant to sulbactam, SM 7338, and BAY 41-6551. Eravacycline shows greater activity than BAY 41-6551, and colistin. The eravacycline MIC₅₀/₉₀values are 0.5/1 mg/L^[1]. Eravacycline shows inhibitory effects on six E. coli with MICs ranging from 0.125 to 0.25 mg/L^[2]. Eravacycline dihydrochloride is a synthetic antibiotic, with inhibits bacterial protein synthesis through binding to the 30S ribosomal subunit. Eravacycline displays broad spectrum activity against gram-negative bacteria in the panel exceptP. aeruginosa, as well as excellent activity against major gram-positive pathogens, including methicillin-resistantS. aureus. Eravacycline also displays potent ribosomal inhibition^[3]. Eravacycline shows potent broad-spectrum activity against 90% of the isolates (MIC₉₀) in each panel at concentrations ranging from ≤0.008 to 2 μg/mL for all species panels except those ofPseudomonas aeruginosaandBurkholderia cenocepacia((MIC₉₀) values of 32 μg/mL for both organisms). Eravacycline is active against multidrug-resistant bacteria, including those expressing extended-spectrum β-lactamases and mechanisms conferring resistance to other classes of antibiotics, including carbapenem resistance^[4].

Mice are treated with two-fold increasing doses (range 3.125 to 50 mg/kg) of eravacycline every 12 hours. The mean fAUC/MIC magnitude associated with net stasis and 1-log kill endpoint are 27.97 ± 8.29 and 32.60 ± 10.85, respectively^[2]. Eravacycline is active in multiple murine models of infection against clinically important Gram-positive and Gram-negative pathogens. Eravacycline is efficacious in mouse septicemia models, demonstrating 50% protective dose values of ≤1 mg/kg of body weight once a day (q.d.) againstStaphylococcus aureus. The PD₅₀values againstEscherichia coliisolates are 1.2 to 4.4 mg/kg q.d^[5].

631.48

Solid

C₂₇H₃₃Cl₂FN₄O₈

1334714-66-7

Room temperature in continental US; may vary elsewhere.

-80°C, protect from light, stored under nitrogen

*该产品在溶液状态不稳定，建议您现用现配，即刻使用。

H₂O : 50 mg/mL(79.18 mM;Need ultrasonic)

DMSO : ≥ 50 mg/mL(79.18 mM)

*"≥" means soluble, but saturation unknown.

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；该产品在溶液状态不稳定，建议您现用现配，即刻使用。

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： PBS

  Solubility: 50 mg/mL (79.18 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: ≥ 5.5 mg/mL (8.71 mM); Clear solution

  此方案可获得 ≥ 5.5 mg/mL (8.71 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 55.0 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
• 3.

  请依序添加每种溶剂： 10% DMSO    90% (20%SBE-β-CDin saline)

  Solubility: ≥ 5.5 mg/mL (8.71 mM); Clear solution

  此方案可获得 ≥ 5.5 mg/mL (8.71 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 55.0 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。

  将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明
• 4.

  请依序添加每种溶剂： 10% DMSO    90%corn oil

  Solubility: ≥ 5.5 mg/mL (8.71 mM); Clear solution

  此方案可获得 ≥ 5.5 mg/mL (8.71 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 55.0 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。