Abstract
Individual glomeruli and attached tubular tissue (JGA) were isolated by microdissection. The mean renin content of superficial JGA was 4.6 ng AI/JGA/h and the renin content of deep JGA was 2.1 ng AI/JGA/h (P<0.01). These values rose with salt depletion but the renin content of superficial glomeruli (22.9 ng AI/JGA/h) remained significantly higher than that of the deep (7.3 ng AI/JGA/h,P<0.005). Surface JGA isolated by a microbiopsy technique had a renin content of 15.5 ng AI/JGA/h which was significantly higher than that found by microdissection. The microbiopsy technique was used to examine the effect of altered distal tubular sodium load on JGA renin content. Increasing proximal tubule flow by 40 nl/min by microperfusion for 20 min with 150 mmol/l NaCl increased significantly the renin content (non perfused controls 12.9 ng AI/JGA/h; perfused 28.7 ng AI/JGA/h). When a perfusion solution containing NaCl 30 mmol/l was used JGA renin content did not change.
Acidification of a microbiopsied glomerulus increased JGA renin content by an amount similar to that seen with microperfusion. These results support the hypothesis that single nephron glomerular filtration rate is controlled by a local action of renin. Renin content and secretion changes in response to NaCl load or concentration at the macula densa. The increased renin concentration may result from activation of inactive renin.
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Bailie, M. D., Rector, F. C., Seldin, S. W.: Angiotensin II in arterial and renal venous plasma and renal hilar lymph in the dog. J. Clin. Invest.50, 119–126 (1971)
Bartoli, E., Earley, L. E.: Measurements of nephron filtration rate in the rat with and without occlusion of the proximal tubule. Kidney Int.3, 372–380 (1972)
Brown, J. J., Davies, D. L., Lever, A. F., Parker, R. A., Robertson, J. I. S.: The assay or renin in single glomeruli in the rabbit and the appearance of the juxtaglomerular apparatus. J. Physiol. (Lond.)176, 418–428 (1965)
Boyd, G. W.: A protein bound form of porcine renal renin. Circ. Res.35, 426–436 (1973)
Dahlheim, H., Granger, P., Thurau, K.: A sensitive method for the determination of renin activity in the single juxtaglomerular apparatus of the rat kidney. Pflügers Arch.321, 303–315 (1970)
Dev, B., Drescher, C., Schnermann, J.: Resetting of tubulo glomerular feedback sensitivity by dietary salt intake. Pflügers Arch.346, 263–277 (1974)
Faarup, P.: Morphological aspects of the renin angiotensin system. Bogtrykeriet Forum, Copenhagen 1971
Flamenbaum, W., Hamburger, R. J.: Superficial and deep juxtaglomerular apparatus renin activity of the rat kidney. Effect of surgical preparation and sodium chloride intake. J. Clin. Invest.54, 1373–1381 (1974)
Goormaghtigh, N.: L'appareil neuro-myo-arterial juxta glomerulaire due rein; ses réactions en pathologie et ses rapports avec le tube urinifere. Comp. Renal Soc. Biol. Belgium124, 293–296 (1937)
Granger, P., Dahlheim, H., Thurau, K.: Enzyme activities of the single juxtaglomerular apparatus in the rat kidney. Kidney Int.1, 78–88 (1972)
Hierholzer, K., Muller-Suur, R., Gutsche, G. U., Butz, M., Lichtenstein, I.: Filtration in surface glomeruli as regulated by flow rate through the loop of Henle. Pflügers Arch.352, 315–337 (1974)
Hofbauer, K. G., Zschiedrich, H., Gross, F.: Regulation of renin release and intrarenal formation of angiotensin. Studies in the isolated perfused rat kidney. Clin. Exp. Pharmacol. Physiol.3, 73–93 (1976)
Hosie, K. F., Brown, J. J., Harper, A. M., Lever, A. F., Macadam, R. F., MacGregor, I., Robertson, J. I. S.: The release of renin into the renal circulation of the anaesthetised dog. Clin. Sci.38, 157–174 (1970)
Johnson, C. I., Mendelsohn, F. A. O., Doyle, A. E.: Metabolism of angiotensin II in sodium depletion and hypertension in humans. Circ. Res.30–31 Supt II, 203–213 (1972)
Knox, F. G., Ott, C., Cuche, J. L., Gasser, J., Hass, J.: Autoregulation of single nephron filtration rate in the presence and absence of flow to the macula densa. Circ. Res.34, 836 (1974)
Leckie, B.: The activation of a possible zymogen form of renin in rabbit kidney. Clin. Sci.44, 301–304 (1973)
Maddox, D. A., Troy, J. L., Brenner, B. M.: Autoregulation of filtration rate in the absence of macula densa—glomerular feedback. Am. J. Physiol.225, 123–131 (1974)
Mendelsohn, F. A. O.: A method for measurement of angiotensin II in tissues and its application to rat kidney. Clin. Sci. Mol. Med.51, 111–125 (1976)
Morgan, T. O.: A microperfusion study of influence of macula densa on glomerular filtration rate. Am. J. Physiol.220, 186–190 (1971)
Morgan, T. O., Davis, J. M.: Renin secretion at the individual nephron level. Pflügers Arch.359, 23–31 (1975)
De Rouffignac, C., Bonvalent, J. P., Menard, J.: Renin content in superficial and deep glomeruli of normal and salt loaded rats. Am. J. Physiol.226, 150–154 (1974)
Schnermann, J., Davis, J. M., Wunderlich, P., Levine, D. Z., Horster, M.: Technical problems in the micropuncture determination of nephron filtration rate and their functional implications. Pflügers Arch.329, 307–320 (1971)
Schnermann, J., Hermle, M.: Maintenance of feedback regulation of filtration dynamics in the absence of divalent cations in the lumen of the distal tubule. Pflügers Arch.358, 311–323 (1975)
Schnermann, J., Hermle, M., Schmidneir, E., Dahlheim, H.: Impaired potency for feedback regulation of glomerular filtration rate in DOCA escaped rats. Pflügers Arch.358, 325–338 (1975)
Schnermann, J., Ploth, D. W., Hermle, M.: Activation of tubulo glomerular feedback by chloride transport. Pflügers Arch.362, 229–240 (1976)
Schnermann, J., Wright, F. S., Davis, J. M., Srackelberg, W., Grill, G.: Regulation of superficial nephron filtration rate by tubulo glomerular feedback. Pflügers Arch.318, 147–175 (1971)
Skinner, S. L.: Improved methods for renin ‘concentration’ and ‘activity’ in human plasma. Methods using selective denaturation of renin substrate. Circ. Res.20, 391–402 (1967)
Thurau, K., Dahlheim, H., Grunner, A., Mason, J., Granger, P.: Activation of renin in the single juxtaglomerular apparatus by sodium chloride in the tubular fluid at the macula densa. Circ. Res.30–31 Supt II, 182–186 (1972)
Thurau, K., Mason, J.: The intra renal function of the juxtaglomerular apparatus. In: Kidney and Urinary Tract Physiology, (K. Thurau, ed.), MTP International Review of Science. London: Butterworths 1974
De Vito, E., Cabrera, R. R., Fasciolo, J. C.: Renin production and release by rat kidney slices. Am. J. Physiol.219, 1042–1045 (1970)
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Supported by N.H.F. of Australia
Research Fellow supported by the Department of Veterans Affairs and the N.H.M.R.C.
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Gillies, A., Morgan, T. Renin content of individual juxtaglomerular apparatuses and the effect of diet, changes in nephron flow rate and in vitro acidification on the renin content. Pflugers Arch. 375, 105–110 (1978). https://doi.org/10.1007/BF00584154
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DOI: https://doi.org/10.1007/BF00584154