Invest Ophthalmol Vis Sci:Fc区域对抗VEGF药物在玻璃体半衰期中的作用!

2017-08-31 cuiguizhong MedSci原创

韩国首尔国立大学医学院眼科系的Joo K近日在Invest Ophthalmol Vis Sci杂志发表了一篇文章,他们研究了可结晶的片段(Fc)在眼内蛋白药物药代动力学中的作用。

韩国首尔国立大学医学院眼科系的Joo K近日在Invest Ophthalmol Vis Sci杂志发表了一篇文章,他们研究了可结晶的片段(Fc)在眼内蛋白药物药代动力学中的作用。

他们在VEGF-Trap的二聚卷曲螺旋结构域,替代天然的Fc区域(MWt = 145kDa)的,产生缺乏Fc区新VEGF-Trap分子(FcfVEGF-Trap,MWt = 100kDa)。在42只兔子中,21只兔子注射VEGF-Trap,另外21只兔子注射FcfVEGF-Trap。分别在其中一只眼睛的玻璃体内注射,在6个时间点(注射后1小时,1天和2天,4天,14天和30天)分别进行测量观察。分别测量玻璃体、房水和视网膜/脉络膜中的VEGF-Trap和FcfVEGF-Trap的分子浓度,并分析药物的药代动力学性质。

他们发现,在所有三个眼部隔室中,FcfVEGF-Trap和VEGF-Trap的最大浓度出现在注射后1小时。FcfVEGF-Trap在玻璃体和视网膜/脉络膜中的半衰期(分别为145.02和102.12小时)分别比VEGF-Trap在玻璃体和视网膜/脉络膜中的半衰期(分别为103.99和44.42小时)分别长1.39和2.30倍。FcfVEGF-Trap在房水和视网膜/脉络膜中的分布面积分别是玻璃体的13.2%和39%,而VEGF-Trap浓度在房水和视网膜/脉络膜中分别是玻璃体的玻璃体的玻璃体的25.2%和26.2%,这表明FcfVEGF-Trap在眼睛中呈现较后的分布,并较慢的清除。

因此,他们认为,尽管FcfVEGF-Trap分子量较低,但与VEGF-Trap相比,在玻璃体和视网膜/脉络膜中半衰期更长,这表明眼组织中的Fc受体有助于抗VEGF药物的消除。 Fc区域的截断或突变可以延长VEGF-Trap在眼内的停留时间,并且可能减少临床中所需的VEGF-Trap注射的次数。

原文出处:

Joo, K., et al., Role of the Fc Region in the Vitreous Half-Life of Anti-VEGF Drugs. Invest Ophthalmol Vis Sci, 2017. 58(10): p. 4261-4267.

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    2017-12-01 haouestc
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    2017-09-02 d830379