Abstract
The rat cortical collecting duct (CCD) exhibits high rates of NaCl reabsorption when stimulated by mineralocorticoid and antidiuretic hormone (ADH). The present study was undertaken to determine if there is significant transcellular Cl− movement across the principal cells of the rat CCD. CCDs were dissected from kidneys of rats that had been injected with deoxycorticosterone (5 mg, i.m.) 2–9 days prior to the experiment. The ducts were perfused in vitro with identical perfusing and bathing solutions, except that 200 pmol.l−1 ADH was added to the bathing solutions. The basolateral membrane voltage (PDbl) of principal cells was −77±1 mV and the luminal membrane voltage (PD1) was −68±1 mV (mean ± SEM, n=124). Separate impalements with single-barrelled Cl−-selective microelectrodes gave an apparent intracellular Cl− activity of principal cells of 17±2 mmol.l−1. Transepithelial PD and PDbl were unaffected by luminal furosemide, hydrochlorothiazide (HCT), 4-acetamido-4-isothiocyanostilbene2,2-disulphonic acid, (SITS), or the Cl− channel blocker 5-nitro-2-(3-phenylpropylamino)-benzoic acid (NPPB); bath addition of SITS or the Cl− channel blocker diphenylamino-2-carboxylic acid; or replacement of bath HCO −3 by Cl−. The intracellular Cl− activity (a Clcell ) also remained unchanged with the addition of HCT, SITS or the Cl− channel blockers to either the perfusing or bathing solutions, or with replacement of the bathing solution HCO −3 . With Cl− replacement in both solutions, a Clcell decreased to 9 mmol.l−1, but not until after 4–6 min, indicating a very low rate of Cl− transport in these cells, even under conditions of maximal stimulation of NaCl reabsorption by mineralocorticoid plus ADH. The remaining a Clcell could be attributed to interference with the Cl− selective electrodes by other cytosolic anions. We conclude that a Clcell of principal cells in the rat CCD is not far above passive equilibrium, and that these cells do not contribute significantly to transepithelial Cl− reabsorption, which must occur by alternative routes such as the paracellular pathway, and/or through intercalated cells.
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Atkins JL, Burg MB (1985) Bicarbonate transport by isolated perfused rat collecting ducts. Am J Physiol 249: F485-F489
Greger R (1981) Cation selectivity of the isolated perfused cortical thick ascending limb of Henle's loop of rabbit kidney. Pflügers Arch 390: 30–37
Greger R, Hampel W (1981) A modified system for in vitro perfusion of isolated renal tubules. Pflügers Arch 389: 175–176
Greger R, Schlatter E (1983) Properties of the lumen membrane of the cortical thick ascending limb of Henle's loop of rabbit kidney. Pflügers Arch 396: 315–324
Greger R, Schlatter E (1984) Mechanism of NaCl secretion in the rectal gland of spiny dogfish (Squalus acanthisa). I. Experiments in isolated in vitro perfused rectal gland tubules. Pflügers Arch 402: 63–75
Greger R, Schlatter E (1984) Mechanism of NaCl secretion in rectal gland tubules of spiny dogfish (Squalus acanthias). II. Effects of inhibitors. Pflügers Arch 402: 364–375
Greger R, Oberleithner H, Schlatter E, Cassola AC, Weidtke C (1983) Chloride activity in cells of isolated perfused cortical thick ascending limbs of rabbit kidney. Pflügers Arch 399: 29–34
Greger R, Schlatter E, Lang F (1983) Evidence for electroneutral sodium chloride cotransport in the cortical thick ascending limb of Henle's loop of rabbit kidney. Pflügers Arch 396: 308–314
Greger R, Schlatter E, Wang F, Forrest JNJr (1984) Mechanism of NaCl secretion in rectal gland tubules of spiny dogfish (Squalus acanthias). III. Effects of stimulation of secretion by cyclic AMP. Pflügers Arch 402: 376–384
Madsen KM, Verlander JW, Tisher CC (1988) Relationship between structure and function in distal tubule and collecting duct. J Electron Microsc Techn 9: 187–208
O'Neil RG, Boulpaep E (1982) Ionic conductive properties and electrophysiology of the rabbit cortical collecting tubule. Am J Physiol 243: F81-F95
O'Neil RG, Hayhurst RA (1985) tFunctional differentiation of cell types of cortical collecting duct. Am J Physiol 248: F449-F453
O'Neil RG, Sansom SC (1984) Electrophysiological properties of cellular and paracellular conductive pathways of the rabbit cortical collecting duct. J Membr Biol 82: 281–295
Reif MC, Troutman SL, Schafer JA (1984) Sustained response to vasopressin in isolated rat cortical collecting tubule. Kidney Int 26: 725–732
Reif MC, Troutman SL, Schafer JA (1986) Sodium transport by rat cortical collecting ubule. Effects of vasopressin and desoxycorticosterone. J Clin Invest 77: 1291–1298
Sansom SC, Weinman EJ, O'Neil RG (1984) Microelectrode assessment of chloride-conductive properties of cortical collecting duct. Am J Physiol 247: F291-F302
Sauer M, Dörge A, Thurau K, Beck F-X (1989) Effect of ouabain on electrolyte concentrations in principal and intercalated cells of the isolated perfused cortical collecting duct. Pflügers Arch 413: 651–655
Schafer JA, Troutman SL (1986) Effect of ADH on rubidium transport in isolated perfused rat cortical collecting tubules. Am J Physiol 250: F1063-F1072
Schafer JA, Troutman SL (1987) Potassium transport in cortical collecting tubules from mineralocorticoid-treated rat. Am J Physiol 253: F76-F88
Schafer JA, Troutman SL, Schlatter E (1990) Vasopressin and mineralocorticoid increase apical membrane driving force for K+ secretion in rat CCD. Am J Physiol 258: F199-F210
Schlatter E (1989) Antidiuretic hormone regulation of electrolyte transport in the distal nephron. Renal Physiol Biochem 12: 65–84
Schlatter E, Greger R (1985) cAMP increases the basolateral Cl−-conductance in the isolated perfused medullary thick ascending limb of Henle's loop of the mouse. Pflügers Arch 405: 367–376
Schlatter E, Schafer JA (1987) Electrophysiological studies in principal cells of rat cortical collecting tubules. ADH increases the apical membrane Na+-conductance. Pflügers Arch 409: 81–92
Schlatter E, Schafer JA (1988) Cortical collecting duct cation transport. In: Davison AM (ed) Nephrology I. Bailliere Tindall, London, pp 294–303
Schlatter E, Bleich M, Greger R (1990) Ion channels in the luminal membrane of isolated perfused rat cortical collecting ducts (CCD). Pflügers Arch 415: R14
Schuster VL (1985) Bradykinin and vasopressin actions on rabbit cortical collecting tubule: mechanism of their interaction and effects on Na transport. Am J Physiol 249: F645-F653
Schuster VL (1986) Cyclic adenosine monophosphate-stimulated anion transport in rabbit cortical collecting duct. Kinetics, stoichiometry, and conductive pathways. J Clin Invest 78: 1621–1630
Schuster VL, Stokes JB (1987) Chloride transport by the cortical and outer medullary collecting duct. Am J Physiol 253: F203-F212
Schuster VL, Bonsip SM, Jennings ML (1986) Two types of collecting duct mitochondria-rich (intercalated) cells: lectin and band 3 cytochemistry. Am J Physiol 251: C347-C355
Stanton B, Puglisi E, Gellai M (1987) Localization of α 2-adrenoreceptor-mediated increase in renal Na+, K+ and water excretion. Am J Physiol 252: F1016-F1021
Stoner LC, Burg MB, Orloff J (1974) Ion transport in cortical collecting tubule; effect of amiloride. Am J Physiol 227: 453–459
Strange K (1989) Ouabain-induced cell swelling in rabbit cortical collecting tubule: NaCl transport by principal cells. J Membr Biol 107: 249–261
Tago K, Schuster VL, Stokes JB (1986) Stimulation of chloride transport by HCO3-CO2 in rabbit cortical collecting tubule. Am J Physiol 251: F49-F56
Tago K, Schuster VL, Stokes JB (1986) Regulation of chloride self exchange by cAMP in cortical collecting tubule. Am J Physiol 251: F40-F48
Tomita K, Pisano JJ, Knepper MA (1985) Control of sodium and potassium transport in the cortical collecting duct of the rat. Effects of bradykinin, vasopressin and deoxycorticosterone. J Clin Invest 76:132–136
Tomita K, Pisano JJ, Burg MB, Knepper MA (1986) Effects of vasopressin and bradykinin on anion transport by the rat cortical collecting duct. Evidence for an electroneutral sodium chloride transport pathway. J Clin Invest 77: 136–141
Wagner S, Vogel R, Lietzke R, Koob R, Drenckhahn D (1987) Immunochemical characterization of a band 3-like anion exchanger in collecting duct of human kidney. Am J Physiol 253: F213-F221
Wangemann P, Wittner M, Di Stefano A, Lang HJ, Englert HC, Schlatter E, Greger R (1986) Chloride channel blockers in the thick ascending limb. Pflügers Arch 406: R59
Warden DH, Schuster VL, Stokes JB (1986) The paracellular pathway of rabbit cortical collecting tubule (CCT): a high resistance, non-selective barrier. Fed Proc 45: 517
Warden DH, Schuster VL, Stokes JB (1988) Characteristics of the paracellular pathway of rabbit cortical collecting duct. Am J Physiol 255: F720-F727
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Schlatter, E., Greger, R. & Schafer, J.A. Principal cells of cortical collecting ducts of the rat are not a route of transepithelial Cl− transport. Pflugers Arch. 417, 317–323 (1990). https://doi.org/10.1007/BF00370998
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DOI: https://doi.org/10.1007/BF00370998