Blood:BIVV001,一种新型FVIII替代品,用于A型血友病的止血控制效果!

2020-02-21 不详 MedSci原创

中心点:BIVV001是一种新型的融合蛋白,在A型血友病临床前模型中的止血控制效果与rFVIII高4倍。BIVV001有潜力为重度A型血友病患者提供针对所有出血类型的更优、更广泛的保护。摘要:FVIII的替代产品为A型血友病患者提供全面的防护。重度A型血友病的治疗目标正在扩大,不再局限于降低年化出血率,还包括与持续高FVIII水平相关的长期预后。虽然内源性VWF可稳定保护FVIII免于降解和清除,

中心点:

BIVV001是一种新型的融合蛋白,在A型血友病临床前模型中的止血控制效果与rFVIII高4倍。

BIVV001有潜力为重度A型血友病患者提供针对所有出血类型的更优、更广泛的保护。

摘要:

FVIII的替代产品为A型血友病患者提供全面的防护。重度A型血友病的治疗目标正在扩大,不再局限于降低年化出血率,还包括与持续高FVIII水平相关的长期预后。

虽然内源性VWF可稳定保护FVIII免于降解和清除,但它也只能使FVIII的半衰期最长维持在15-19小时。进一步提高重组FVIII (rFVIII)的半衰期取决于内源性VWF与rFVIII解耦联。

Schratz等人开发了一种新的FVIII替代品,rFVIIIFc-VWF-XTEN (BIVV001),在生理条件下,它可与内源性VWF解耦,并与既往所有FVIII产品相比,药代动力学特性增强。BIVV001是一个独特的融合蛋白,由VWF-D?D3结构域融合通过免疫球蛋白rFVIII G1 Fc结构域和两个XTEN?多肽与rFVIII融合组成。

BIVV001给药后,小鼠和猴子的血浆FVIII半衰期分别为25-31小时和33-34小时,提示FVIII半衰期延长了3-4倍。

本研究结果表明,考虑多方面的蛋白质工程的效果远远超过一些简单氨基酸的替代,可以显著改善rFVIII的药代动力学性质,同时保持止血功能。BIVV001是首个rFVIII,以更小的剂量通过对所有出血类型提供最佳的保护,有可能将大大改变重度A型血友病的治疗模式。而且,这种蛋白质工程方法也可应用于其它复杂蛋白质。

原始出处:


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    2020-08-02 juliusluan78
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    2020-11-05 wjcjjian
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    2020-02-23 jeanqiuqiu
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    2020-02-21 CHANGE

    疗效只是效果的众多方面之一,还要看对患者的获益,包括生活质量等因素共同决定效果的

    0

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