...
首页> 外文期刊>Journal of Theoretical Biology >On the role of diffusible binding partners in modulating the transport and concentration of proteins in tissues.
【24h】

On the role of diffusible binding partners in modulating the transport and concentration of proteins in tissues.

机译:关于可扩散结合伴侣在调节组织中蛋白质的运输和浓度中的作用。

获取原文
获取原文并翻译 | 示例
           

摘要

Here a reactive-diffusion transport model is used to demonstrate two previously undescribed functional roles for diffusible binding partners in the transport of molecules into tissues. The uptake of the insulin-like growth (IGF) and its binding partner the IGF binding protein (IGFBP3) into cartilage is used a specific tissue example to demonstrate a general principal. First, we show that reversible binding between free protein (IGF) and its diffusible binding partner (free IGFBPs) increases the rate of protein uptake into the tissue. Second, selective degradation of the binding partner can increase the transient and steady state free protein in tissues, well above the concentration at the source boundary, with the maximum free concentration occurring distant from the source boundary, deep within the tissue. This finding is very much at odds with expectations based on a traditional diffusion analysis. In cartilage, using realistic parameters, these new mechanisms raise the free IGF concentration by an order of magnitude deep within the tissue. As the increase in free protein is 'tunable' by cells, our analyses are postulated to demonstrate a general regulatory principle that may operate in any tissues throughout the body.
机译:在这里,使用反应扩散运输模型来证明在将分子运输到组织中时可扩散的结合伴侣的两个先前未描述的功能作用。胰岛素样生长(IGF)及其结合伴侣IGF结合蛋白(IGFBP3)摄取到软骨中的作用是通过特定的组织实例来证明的。首先,我们证明了游离蛋白(IGF)与它的可扩散结合伴侣(游离IGFBPs)之间的可逆结合增加了蛋白质摄入组织的速率。第二,结合伴侣的选择性降解可以增加组织中的瞬时和稳态游离蛋白,远高于源边界处的浓度,而最大游离浓度发生在远离源边界的组织内部。这一发现与基于传统扩散分析的预期大相径庭。在软骨中,使用现实的参数,这些新机制将组织内深处的游离IGF浓度提高了一个数量级。由于游离蛋白的增加可被细胞“调节”,因此我们的分析被假定为证明可在全身任何组织中起作用的一般调节原理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号