AF12198 is a potent, selective and specific peptide antagonist for human type I interleukin-1 receptor (IL1-R1) (IC₅₀=8 nM) but not the human type II receptor (IC₅₀=6.7 µM) or the murine type I receptor (IC₅₀>200 µM). AF12198 inhibits IL-1-induced IL-8 production (IC₅₀=25 nM) and IL-1-induced intercellular adhesion molecule-1 (ICAM-1) expression (IC₅₀=9 nM) in vitro. AF12198 has anti-inflammatory activities and blocks responses to IL-1 in vivo^[1].

AF12198 competes for binding of ¹²⁵I-IL-1α with an IC₅₀ of 8.0 nM, nearly equal to that of IL-1ra, IC₅₀ of 4.0 nM for the type I receptor^[1].
AF12198 (0-5 ng; 8 hours) inhibits IL-6 induction with an IC₅₀ of 15 μM whereas IL-1ra inhibits with an IC₅₀ of 2 nM in heparinized human primate blood. Meanwhile, With blood from cynomolgus monkeys, the IC₅₀ values are 17 μM for AF12198 and 30 nM for IL-1ra. Additionally, AF12198 or IL-1RA alone does not induce IL-6 in blood from either humans or cynomolgus monkeys^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

AF12198 (intravenous infusion; 16 mg/kg; 30 min before LPS intravenous injection) significantly attenuates the increase in lung MPO activity induced by LPS in acute lung inflammation and it reduces the lung microvascular leakage from rats inflamed with LPS at the 4 h (32.6%), 12 h (50.1%) and 24 h (65.3%) after LPS^[2].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

1895.12

C₉₆H₁₂₃N₁₉O₂₂

185413-30-3

Ac-Phe-Glu-Trp-Thr-Pro-Gly-Trp-Tyr-Gln-{Aze}-Tyr-Ala-Leu-Pro-Leu-NH2

Ac-FEWTPGWYQ-{Aze}-YALPL-NH2

Room temperature in continental US; may vary elsewhere.

Powder	-80deg;C	2 years
	-20deg;C	1 year
In solvent	-80deg;C	6 months
	-20deg;C	1 month

In Vitro:;

DMSO : 100 mg/mL (52.77 mM; Need ultrasonic)

*

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°C, 6 months; -20°C, 1 month。-80°C 储存时，请在 6 个月内使用，-20°C 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：;10% DMSO ;; 40% PEG300 ;; 5% Tween-80 ;; 45% saline

  Solubility: ≥ 2.5 mg/mL (1.32 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (1.32 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：;10% DMSO ;; 90% corn oil

  Solubility: ≥ 2.5 mg/mL (1.32 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (1.32 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 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

• [1]. F Aimbire, et al. Low level laser therapy (LLLT) decreases pulmonary microvascular leakage, neutrophil influx and IL-1beta levels in airway and lung from rat subjected to LPS-induced inflammation. Inflammation

  [2]. A L Akeson, et al.AF12198, a novel low molecular weight antagonist, selectively binds the human type I interleukin (IL)-1 receptor and blocks in vivo responses to IL-1. J Biol Chem. 1996 Nov 29;271(48):30517-23.