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  • Title: Renal lymph protein in the rat.
    Author: Hargens AR, Tucker BJ, Blantz RC.
    Journal: Am J Physiol; 1977 Oct; 233(4):F269-73. PubMed ID: 910951.
    Abstract:
    Renal lymph and systemic (posterior) lymph were studied in hydropenic rats. As a consequence of the anatomical arrangement of collecting lymphatics near the kidney, mixed renal and systemic lymph tributaries are situated in such a way that sampling pure renal lymph is difficult. Pure renal lymph contains 1.0 +/- 0.1 g/100 ml total protein with an albumin-to-globulin (A/G) ratio of 2.1 +/- 0.1. Mixed renal and extrarenal lymphatic tributaries contain 3.3 +/- 0.2 g/100 ml total protein with an A/G ratio of 1.8 +/- 0.2. Corresponding values in the plasma are 4.9 +/- 0.2 and 1.2 +/- 0.1 g/100 ml, respectively. Previous studies in which the concentration of renal lymph protein was determined as 30-50% of that in plasma were probably in error due to contamination of renal samples by posterior lymph ducts. The amount of systemic and renal lymph mixing is highly variable from one animal to another. Our renal lymph samples in carefully controlled and prepared Munich-Wistar rats contained a total protein uniformly 20% of that in plasma.
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