In Vivo Clearance of Human Protein S in a Mouse Model: Influence of C4b-Binding Protein and the Heerlen Polymorphism
In Vivo Clearance of Human Protein S in a Mouse Model: Influence of C4b-Binding Protein and the Heerlen Polymorphism
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小鼠模型中人蛋白 S 的体内清除:C4b 结合蛋白和 Heerlen 多态性的影响
DOI:
10.1161/01.atv.0000181760.55269.6b
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
P. Lenting
中科院分区:
文献类型:
--
作者:
C. Denis;S. Roberts;T. Hackeng;P. Lenting
Objective—To explore the effect of the Heerlen polymorphism and C4b-binding protein (C4BP) on protein S catabolism in vitro and in vivo. Methods and Results—Radiolabeled protein S was efficiently bound and intracellularly degraded by THP-1 macrophages, and both processes were strongly reduced in the presence of the protein S-carrier protein C4BP. To test whether C4BP displays a similar protective effect in vivo, survival experiments were performed in mice. In the absence of C4BP, radiolabeled human protein S disappeared in a biphasic manner (mean residence time [MRT] 2 hours). However, the presence of C4BP resulted in a 4-fold prolonged survival of protein S (MRT 8 hours; P<0.0001). We also applied this experimental model to recombinant protein S-Heerlen, a naturally occurring variant that contains a Ser460Pro substitution. These clearance experiments revealed a strongly decreased survival of recombinant protein S-S460P (MRT 0.6 hours; P=0.021), which could be compensated partially by C4BP (MRT 1.4 hours; P=0.012 compared with protein S-S460P). Conclusion—Protein S-S460P has a reduced survival in vivo, which may explain the low levels of free protein S in individuals carrying this polymorphism. Furthermore, C4BP prevents premature clearance of protein S and uses this ability to compensate the increased clearance of protein S-S460P.
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DOI:
10.1016/s0021-9258(19)68566-2
发表时间:
1981-11
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
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通讯作者:
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影响因子:
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DOI:
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1999
期刊:
Thrombosis and haemostasis.
影响因子:
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作者:
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发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
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作者:
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DOI:
10.1073/pnas.95.16.9524
发表时间:
1998-08-04
影响因子:
11.1
作者:
Denis, C;Methia, N;Wagner, DD
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