Abstract
1. The anatomy of the renal lymphatics and the flow and composition of renal lymph have been investigated in sheep. Lymphatic capillaries were demonstrated in the cortex and cortico-medullary areas of the sheep's kidney but not within the medulla. The lymph formed in the sheep's kidney drains from the hilum through several small lymphatics; there is no lymphatic drainage from the renal capsule.
2. Lymph flow from the sheep's kidney varied from 0·5 to 3·0 ml./hr. The concentrations of electrolytes and urea in renal lymph were found to be similar to lymph from other regions of the body, but the concentration of endogenous creatinine was lower. The average concentration of protein in renal lymph was 43% of the plasma levels; there was a significantly higher proportion of albumin in renal lymph than in plasma. When labelled albumin was injected intravenously, the specific activities of the plasma and renal lymph albumin equilibrated in about 2 hr.
3. When [14C]inulin, [125I]hippuran or [14C]creatinine were infused intravenously radioactivity appeared rapidly in the renal lymph. When steady-state levels were reached in the circulating plasma, the renal lymph/jugular vein plasma ratios for [14C]inulin and [14C]creatinine were 0·82 while for [125I]hippuran the ratio was 0·34. It was considered that the concentration of these substances in renal lymph was similar to the concentration in renal vein plasma.
4. The concentration of renin enzyme was on the average about 8 times higher in renal lymph than in jugular vein or renal vein plasma or in lymph from the hind limbs.
5. Renal lymph appeared to be formed principally, if not entirely, in the renal cortex and appeared to be a modified filtrate derived from post-glomerular blood capillaries. If any contribution to renal lymph does come from the medulla, it must be small in relation to the volume of lymph formed in the cortex.
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- BULL G. M., METAXAS P. The theory and application or clearance methods for determining renal blood and lymph flow. Clin Sci. 1962 Dec;23:515–523. [PubMed] [Google Scholar]
- Blair-West J. R., Coghlan J. P., Denton D. A., Scoggins B. A., Wintour M., Wright R. D. The renin-angiotensin-aldosterone system in sodium depletion. Med J Aust. 1967 Aug 12;2(7):290–293. [PubMed] [Google Scholar]
- EDWARDS K. D., WHYTE H. M. The measurement of creatinine in plasma and urine. Aust J Exp Biol Med Sci. 1958 Aug;36(4):383–394. doi: 10.1038/icb.1958.41. [DOI] [PubMed] [Google Scholar]
- FOLDI M. The volume of renal lymph-flow. Lancet. 1963 Apr 13;1(7285):831–832. doi: 10.1016/s0140-6736(63)91540-x. [DOI] [PubMed] [Google Scholar]
- HALL J. G., MORRIS B. The output of cells in lymph from the popliteal node of sheep. Q J Exp Physiol Cogn Med Sci. 1962 Oct;47:360–369. doi: 10.1113/expphysiol.1962.sp001620. [DOI] [PubMed] [Google Scholar]
- JARAUSCH K. H., ULLRICH K. J. Untersuchungen zum Problem der Harnkonzentrierung und Harnverdünnung; Uber die Verteilung von Elektrolyten (Na, K, Ca, Mg, Cl, anorganischem Phosphat), Harnstoff, Aminosäuren und exogenem Kreatinin in Rinde und Mark der Hundeniere bei verschiedenen Diuresezuständen. Pflugers Arch. 1956;262(6):537–550. doi: 10.1007/BF00362116. [DOI] [PubMed] [Google Scholar]
- Keyl M. J., Scott J. B., Dabney J. M., Haddy F. J., Harvey R. B., Bell R. D., Ginn H. E. Composition of canine renal hilar lymph. Am J Physiol. 1965 Nov;209(5):1031–1033. doi: 10.1152/ajplegacy.1965.209.5.1031. [DOI] [PubMed] [Google Scholar]
- LEBRIE S. J., MAYERSON H. S. Composition of renal lymph and its significance. Proc Soc Exp Biol Med. 1959 Feb;100(2):378–380. doi: 10.3181/00379727-100-24633. [DOI] [PubMed] [Google Scholar]
- LEVER A. F., PEART W. S. Renin and angiotensin-like activity in renal lymph. J Physiol. 1962 Mar;160:548–563. doi: 10.1113/jphysiol.1962.sp006865. [DOI] [PMC free article] [PubMed] [Google Scholar]
- MAYERSON H. S. The lymphatic system with particular reference to the kidney. Surg Gynecol Obstet. 1963 Mar;116:259–272. [PubMed] [Google Scholar]
- MESCHAN I., SCHMID H. E., WATTS F. C., WITCOFSKI R. THE UTILIZATION OF RADIOACTIVE IODINATED HIPPURAN FOR DETERMINATION OF RENAL CLEARANCE RATES. Radiology. 1963 Sep;81:437–446. doi: 10.1148/81.3.437. [DOI] [PubMed] [Google Scholar]
- MORRIS B. The exchange of protein between the plasma and the liver and intestinal lymph. Q J Exp Physiol Cogn Med Sci. 1956 Jul;41(3):326–340. doi: 10.1113/expphysiol.1956.sp001196. [DOI] [PubMed] [Google Scholar]
- O'Morchoe C. C., O'Morchoe P. J. Renal contribution to thoracic duct lymph in dogs. J Physiol. 1968 Feb;194(2):305–315. doi: 10.1113/jphysiol.1968.sp008409. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Pedersen N. C., Morris B. The role of the lymphatic system in the rejection of homografts: a study of lymph from renal transplants. J Exp Med. 1970 May 1;131(5):936–969. doi: 10.1084/jem.131.5.936. [DOI] [PMC free article] [PubMed] [Google Scholar]
- ROIJERS A. F., TAS M. M. THE DETERMINATION OF UREA WITH P-DIMETHYLAMINOBENZALDEHYDE. Clin Chim Acta. 1964 Mar;9:197–202. doi: 10.1016/0009-8981(64)90094-4. [DOI] [PubMed] [Google Scholar]
- Skinner S. L. Improved assay methods for renin "concentration" and "activity" in human plasma. Methods using selective denaturation of renin substrate. Circ Res. 1967 Apr;20(4):391–402. doi: 10.1161/01.res.20.4.391. [DOI] [PubMed] [Google Scholar]