Early kinetics of large molecule transport between plasma and lymph in dogs.

Early kinetics of large molecule transport between plasma and lymph in dogs.
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狗血浆和淋巴液之间大分子运输的早期动力学。

DOI:
10.1152/ajpheart.1980.239.4.h525
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发表时间:
1980
期刊:
The American journal of physiology
影响因子:
--
通讯作者:
Renkin,EM
Renkin,EM
中科院分区:
--
文献类型:
--
作者:
Watson,PD;Bell,DR;Renkin,EM

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使用一个数学模型,在该模型中,间质空间类似于凝胶过滤柱,Watson和Grodins(Microvarc.结果16:19-41)预测,比血清白蛋白大的分子在淋巴中应该比血清白蛋白更早接近稳定状态。在用戊巴比妥钠麻醉的狗身上,用放射性标记的白蛋白和纤维蛋白原和荧光葡聚糖,并通过收集后爪窝前淋巴管的淋巴来验证这一假说。生化测定的稳态淋巴-血浆浓度比(R)白蛋白为0.24±0.02(SE,n=16),纤维蛋白原为0.040±0.004(n=16)。在5小时内,白蛋白和纤维蛋白原示踪剂分别达到其稳态水平的约25%和50%。葡聚糖(摩尔质量分数为1.5×10(5))表现为纤维蛋白原。这些数据支持这样的假设,即间质具有非限制性路径,并且存在对非常大的分子具有低渗透性的凝胶区。
Using a mathematical model in which the interstitial space resembled a gel filtration column, Watson and Grodins (Microvasc. Res. 16: 19-41, 1978) predicted that molecules larger than serum albumin should have an early approach to steady state in lymph faster than that of serum albumin. This hypothesis was tested in dogs anesthetized with pentobarbital sodium by use of radiolabeled albumin and fibrinogen and a fluorescent dextran and by collecting lymph from cannulas in the prepopliteal lymphatics of the hind paws. The steady-state lymph-plasma concentration ratios (R), measured chemically, were 0.24 ± 0.02 (SE, n = 16) for albumin and 0.040 ± 0.004 (n = 16) for fibrinogen. In 5 h, albumin and fibrinogen tracers had reached approximatly 25 and 50% of their steady-state levels, respectively. The dextran (mol wt 1.5 x 10(5)) behaved like fibrinogen. The data support the hypothesis that the interstitium has nonrestricting pathways, and that there are gel regions that have a low permeability to very large molecules.
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