A biotinylated peptide, BP21, alleviates hypotension in anaphylactic mice

A biotinylated peptide, BP21, alleviates hypotension in anaphylactic mice
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生物素化肽 BP21 可缓解过敏小鼠的低血压

DOI:
10.1002/psc.3197
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发表时间:
2019
影响因子:
2.1
通讯作者:
Keiichi Ebina
Keiichi Ebina
中科院分区:
生物学4区
文献类型:
--
作者:
Akira Sato;Keiichi Ebina

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血小板激活因子(PAF)被认为是过敏反应的重要介质,因此可能作为抗过敏药物的直接靶点。我们最近报道了一种合成的 N 末端生物素化肽 BP21,通过肽中的 Tyr-Lys-Asp-Gly 序列与 PAF 的直接结合,可以缓解过敏反应小鼠模型中过敏反应期间的体温过低和血管通透性过高。在这项研究中,我们研究了 BP21 对体内过敏性低血压的影响。结果显示,BP21 以剂量依赖性方式显着抑制过敏性低血压,并在 20 分钟内达到严重程度的峰值。肾上腺素是过敏患者推荐的一线治疗方法,但它不能抑制过敏性低体温。 BP21 与肾上腺素的联合给药即使在低剂量下也能抑制低血压和体温过低,与单独给药 BP21 或肾上腺素相比更有效。这些结果表明 BP21 有可能成为一种体内靶向 PAF 的新型抗过敏剂。
Platelet‐activating factor (PAF) is known as an important mediator of anaphylaxis and, therefore, may possibly serve as a direct target for anti‐anaphylactic drugs. We recently reported that a synthetic N‐terminally biotinylated peptide, BP21, alleviates hypothermia and vascular hyperpermeability during anaphylactic reactions in a mouse model of anaphylaxis via the direct binding of a Tyr‐Lys‐Asp‐Gly sequence in the peptide to PAF. In this study, we investigated the effect of BP21 on in vivo anaphylactic hypotension. Results showed that BP21 significantly inhibited anaphylactic hypotension in a dose‐dependent manner, with peak severity being reached within 20 minutes. Adrenaline, which is the recommended first line treatment for anaphylactic patients, did not inhibit anaphylactic hypothermia. The combined administration of BP21 with adrenaline inhibited both hypotension and hypothermia, even at both low doses, more effectively compared with solo administration of BP21 or adrenaline. These results suggested that BP21 could potentially be a novel anti‐anaphylactic agent for targeting PAF in vivo.
DOI: 10.1016/j.ejphar.2015.06.062
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