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Masyuk AI, Masyuk TV, Tietz PS, Splinter PL, LaRusso NF. Intrahepatic bile ducts transport water in response to absorbed glucose. Am J Physiol Cell Physiol 2002; 283:C785-91. [PMID: 12176735 DOI: 10.1152/ajpcell.00118.2002] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The physiological relevance of the absorption of glucose from bile by cholangiocytes remains unclear. The aim of this study was to test the hypothesis that absorbed glucose drives aquaporin (AQP)-mediated water transport by biliary epithelia and is thus involved in ductal bile formation. Glucose absorption and water transport by biliary epithelia were studied in vitro by microperfusing intrahepatic bile duct units (IBDUs) isolated from rat liver. In a separate set of in vivo experiments, bile flow and absorption of biliary glucose were measured after intraportal infusion of D-glucose or phlorizin. IBDUs absorbed D-glucose in a dose- and phlorizin-dependent manner with an absorption maximum of 92.8 +/- 6.2 pmol. min(-1). mm(-1). Absorption of D-glucose by microperfused IBDUs resulted in an increase of water absorption (J(v) = 3-10 nl. min(-1). mm(-1), P(f) = 40 x 10(-3) cm/sec). Glucose-driven water absorption by IBDUs was inhibited by HgCl(2), suggesting that water passively follows absorbed D-glucose mainly transcellularly via mercury-sensitive AQPs. In vivo studies showed that as the amount of absorbed biliary glucose increased after intraportal infusion of D-glucose, bile flow decreased. In contrast, as the absorption of biliary glucose decreased after phlorizin, bile flow increased. Results support the hypothesis that the physiological significance of the absorption of biliary glucose by cholangiocytes is likely related to regulation of ductal bile formation.
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Affiliation(s)
- Anatoly I Masyuk
- Center for Basic Research in Digestive Diseases, Division of Gastroenterology and Hepatology, Mayo Medical School, Clinic, and Foundation, Rochester, Minnesota 55905, USA
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Cojocel C, Franzen-Sieveking M, Berndt W, Baumann K. Dependence of renal protein reabsorption on glomerular filtration rate and infusion time. Pflugers Arch 1984; 402:34-8. [PMID: 6504691 DOI: 10.1007/bf00584828] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Egg-white-lysozyme was infused into rats intravenously to achieve plasma concentrations of lysozyme (PLy) in the range of 10-3,500 mg X l-1. Concentrations of inulin and lysozyme in plasma and urine samples were determined spectrophotometrically. The glomerular filtration rate (GFR) was measured as clearance of inulin. The lysozyme reabsorption rate (TLy) was calculated as the difference between the filtered load and excreted amount of lysozyme. TLy increased with increasing filtered loads of lysozyme up to 1,000 micrograms X min-1 whether the increase in load was caused by an increase in PLy or GFR. These TLy were not dependent upon lysozyme infusion time. At lysozyme loads above saturation of reabsorption (1,000 micrograms X min-1) TLy was dependent on GFR and on the passed time after onset of lysozyme infusion. The results of this study indicated that the transport rate of lysozyme is a function of PLy, GFR and duration of lysozyme delivery to tubular cells.
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Aperia A, Broberger O, Broberger U, Herin P, Zetterström R. Glomerular tubular balance in preterm and fullterm infants. ACTA PAEDIATRICA SCANDINAVICA. SUPPLEMENT 1983; 305:70-6. [PMID: 6351537 DOI: 10.1111/j.1651-2227.1983.tb09863.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The development of glomerular and tubular function was studied in preterm and fullterm infants of varying gestational and postnatal age. The results indicate that glomerular functional development precedes tubular functional development until the 34th postmenstrual week. After the 34th week the tubular transport capacity seems to be more vulnerable than the glomerular filtration rate in states of disease. The release of a postulated renal vasoconstriction could account for the rapid changes in renal function after birth. The purpose of such a vasoconstriction could be to protect the tubules from an overload.
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Corman B, Roinel N, De Rouffignac C. Water reabsorption capacity of the proximal convoluted tubule: a microperfusion study on rat kidney. J Physiol 1981; 316:379-92. [PMID: 7320874 PMCID: PMC1248153 DOI: 10.1113/jphysiol.1981.sp013795] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
1. The differences in the water reabsorption capacity observed from one proximal tubule to another were investigated in vivo by continuous microperfusion. 2. Two to seven loops were punctured along the same tubule. The [3H]inulin, 22Na, [14C]glucose, sodium, chloride and magnesium concentrations as well as the osmolality of the collected samples were studied as a function of the perfused length. 3. With Ringer bicarbonate solution perfused in Saclay Wistar rats, the water reabsorption capacity ranged from 0 to 3 nl . min-1 . mm-1 depending on the tubule. This reabsorption rate was closely correlated with the unidirectional reabsorption flux of sodium, and with the rise in tubular chloride and magnesium concentrations. 4. In Munich Wistar rats with glomeruli accessible at the kidney surface, tubule perfusion with a Ringer bicarbonate solution showed that the highest water reabsorption rates per mm of tubule were found for the perfusion sites closest to the glomerulus; water fluxes were also positively correlated with glucose transport. 5. In a second series of experiments on Saclay rats, perfusion of a Ringer solution containing a high chloride concentration (137 m-equiv/l.) was unable to increase the water reabsorption rate compared to the control perfusion; here again, water fluxes were positively correlated with glucose transport.
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Corman B, Roinel N, de Rouffignac C. Dependence of water movement on sodium transport in kidney proximal tubule: a microperfusion study substituting lithium for sodium. J Membr Biol 1981; 62:105-11. [PMID: 7277472 DOI: 10.1007/bf01870204] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The relationship between water and sodium movements through the mammalian proximal convoluted tubule was investigated by substituting lithium for sodium. Proximal convoluted rat Kidney tubules were perfused in vivo with a Ringer solution containing 107 meq/liter lithium and 42 meq/liter sodium. Several micropunctures were made along the same nephron, and [3H] inulin, [14C] glucose, 22Na, osmolality, Na, Mg and Cl were determined on each sample. Measurements of 22Na showed that sodium and lithium diffusion rates were practically identical throughout the entire epithelium. A one- for-one exchange of sodium for lithium induced a negative transepithelial net flux of Na from plasma to lumen. However, despite this negative flux, a positive net water movement was measured from lumen to plasma. This movement was proportional both to glucose reabsorption and to the rise in the chloride concentration, two mechanisms known to be dependent on the transcellular movement of sodium. It was therefore concluded that the net water flux was a function of the unidirectional transcellular net flux of Na. Rabbit proximal convoluted tubules were perfused in vitro with solution containing 75 meq/liter Li and 75 meq/liter Na on both the luminal and peritubular sides. Under these conditions, the water reabsorption rate dropped to half its control value. Water movement was therefore a function of the external sodium concentration, which in turn probably regulates the intracellular Na concentration.
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Silbernagl S. The role of brush border enzymes in tubular reabsorption of disaccharides: a microperfusion study in rat kidney. Pflugers Arch 1977; 371:141-5. [PMID: 339192 DOI: 10.1007/bf00580782] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Renal tubular reabsorption of maltose, sucrose and lactose were studied in vivo et situ by continuous microperfusion of single proximal convolutions of rat kidney. The 14C-label of maltose (2.5 mmol/l) was removed from the lumen of the proximal tubule at about the same rate as found for glucose. Maltose reabsorption was completely inhibited in presence of 30 mmol/l glucose or of 0.1 mmol/l phlorizin. Chemical analysis of the samples showed a complete conversion of maltose into glucose within a perfusion distance of 2 mm. It is concluded from these results that within the tubular lumen maltose is split very rapidly by a brush border glucosidase. The short half time of this process permits the breakdown product glucose to be almost completely reabsorbed subsequently within the proximal tubule. In contrast, sucrose and lactose were neither split nor reabsorbed by the tubule brush border.
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Sepúlveda FV, Robinson JW. Effect of (+)-catechin on renal and intestinal transport. EXPERIENTIA 1976; 32:87-9. [PMID: 129336 DOI: 10.1007/bf01932638] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The ability of dog renal cortex slices to accumulate beta-methyl-glucoside or glycine is enhanced by the flavonoid (+)-catechin at a concentration of 3.5 mM. This stimulatory effect is apparently due to a decreased rate of efflux of either substrate. On the other hand, the uptake of p-amino-hippuric acid and N1-methyl-nicotinamide is inhibited by (+)-catechin. The drug at the same concentration is without action on amino-acid transport by guinea-pig intestine in vitro.
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Silbernagl S. Cycloleucine (1-amino-cyclopentane carboxylic acid): tubular reabsorption and inhibitory effect on amino acid transport in the rat kidney. (Microperfusion experiments). Pflugers Arch 1975; 353:241-53. [PMID: 1168338 DOI: 10.1007/bf00584287] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Renal tubular reabsorption of cycloleucine (1-amino-cyclopentane carboxylic acid) was studied in vivo et situ by continuous microperfusion of single proximal tubules of the rat. The results show: a) cycloleucine is reabsorbed rapidly compared with other amino acids b) this reabsorption is saturable and can be inhibited by oligomycin c) cycloleucine inhibits tubular reabsorption of L-arginine, glycine, and of L-phenylalanine. Mutual reciprocal inhibition occurs only with L-phenylalanine (and perhaps also with glycine). A maximal possible permeability coefficient for cycloleucine (less than 6 times 10--5 cm times sec--1) was calculated. Assuming simple 2-parameter kinetics, Vmax and Km for tubular reabsorption of cycloleucine were estimated. It can be concluded from the present results that cycloleucine is reabsorbed by a mechanism that transports L-phenylalanine, but not by the system shared by dibasic amino acids.
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Rea C, Segal S. The effect of pH on alpha-methyl-D-glucoside accumulation by rat kidney cortex slices. BIOCHIMICA ET BIOPHYSICA ACTA 1974; 345:162-9. [PMID: 4407523 DOI: 10.1016/0005-2736(74)90255-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Segal S, Rosenhage M. The effect of extracellular sodium concentration on α-methyl-d-glucoside transprot by rat kidney cortex slices. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 1974. [DOI: 10.1016/0005-2736(74)90380-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Davison JM, Lovedale C. The excretion of glucose during normal pregnancy and after delivery. THE JOURNAL OF OBSTETRICS AND GYNAECOLOGY OF THE BRITISH COMMONWEALTH 1974; 81:30-4. [PMID: 4818313 DOI: 10.1111/j.1471-0528.1974.tb00360.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Kwong TF, Bennett CM. Relationship between glomerular filtration rate and maximum tubular reabsorptive rate of glucose. Kidney Int 1974; 5:23-9. [PMID: 4813587 DOI: 10.1038/ki.1974.3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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von Baeyer H, von Conta C, Haeberle D, Deetjen P. Determination of transport constants for glucose in proximal tubules of the rat kidney. Pflugers Arch 1973; 343:273-86. [PMID: 4796820 DOI: 10.1007/bf00595815] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Karlsson KA, Samuelsson BE, Steen GO. The sphingolipid composition of bovine kidney cortex, medulla and papilla. BIOCHIMICA ET BIOPHYSICA ACTA 1973; 316:317-35. [PMID: 4356060 DOI: 10.1016/0005-2760(73)90072-6] [Citation(s) in RCA: 120] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Rea C, Segal S. Dibutyryl cyclic adenosine monophosphate enhancement of alpha-methyl-D-glucoside accumulation by kidney cortex slices. BIOCHIMICA ET BIOPHYSICA ACTA 1973; 311:615-24. [PMID: 4354134 DOI: 10.1016/0005-2736(73)90134-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Silbernagl S, Deetjen P. Molecular specificity of the L-arginine reabsorption mechanism. Microperfusion studies in the proximal tubule of rat kidney. Pflugers Arch 1973; 340:325-34. [PMID: 4737007 DOI: 10.1007/bf00592310] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Segal S, Rosenhagen M, Rea C. Developmental and other characteristics of -methyl-D-glucoside transport by rat kidney cortex slices. BIOCHIMICA ET BIOPHYSICA ACTA 1973; 291:519-30. [PMID: 4690864 DOI: 10.1016/0005-2736(73)90503-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Lang F, Greger R, Deetjen P. Handling of uric acid by the rat kidney. 3. Microperfusion studies on steady state concentration of uric acid in the proximal tubule. Consideration of free flow conditions. Pflugers Arch 1973; 338:295-302. [PMID: 4734842 DOI: 10.1007/bf00586071] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Hare D, Stolte H. Rat proximal tubule D-glucose transport as a function of concentration, flow, and radius. Pflugers Arch 1972; 334:207-21. [PMID: 4676253 DOI: 10.1007/bf00626224] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Stolte H, Hare D, Boylan JW. D-glucose and fluid reabsorption in proximal surface tubule of the rat kidney. Pflugers Arch 1972; 334:193-206. [PMID: 4676252 DOI: 10.1007/bf00626223] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Brodehl J, Franken A, Gellissen K. Maximal tubular reabsorption of glucose in infants and children. ACTA PAEDIATRICA SCANDINAVICA 1972; 61:413-20. [PMID: 5041387 DOI: 10.1111/j.1651-2227.1972.tb15856.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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L-Arginine transport in rat proximal tubules. Pflugers Arch 1972. [DOI: 10.1007/bf00589144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Lang F, Greger R, Deetjen P. Handling of uric acid by the rat kidney. II. Microperfusion studies on bidirectional transport of uric acid in the proximal tubule. Pflugers Arch 1972; 335:257-65. [PMID: 4673210 DOI: 10.1007/bf00586216] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Baines AD. Effect of extracellular fluid volume expansion on maximum glucose reabsorption rate and glomerular tubular balance in single rat nephrons. J Clin Invest 1971; 50:2414-25. [PMID: 5096524 PMCID: PMC292184 DOI: 10.1172/jci106740] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Extracellular fluid volume expansion with isotonic saline (7.5% of body weight) decreased maximum glucose reabsorption rate by rat kidneys at plasma glucose concentrations greater than 30 mM. Glucose reabsorption rate was 30.2 +/-1.6 (SE) mumoles/min.g kidney in nonexpanded rats; it was 18.4 +/-1.5 mumoles/min.g in volume-expanded rats. Glucose reabsorption determined by micropuncture was 92% complete at the end of accessible superficial proximal convolutions. Volume expansion resulted in a slight but statistically insignificant reduction of maximal glucose reabsorption rate in superficial nephrons from 786 +/-35 mumumoles/min.g kidney in nonexpanded rats to 720 +/-30 mumumoles/min.g in volume-expanded rats. Superficial nephron filtration rate was increased by volume expansion from 28.8 +/-1.2 nl/min.g to 36.6 +/-1.5 nl/min.g kidney. In nonexpanded rats, the ratio of glucose reabsorption to glomerular filtration (tmg/sgfr) was similar in superficial and juxtamedullary nephrons. In volume-expanded rats superficial nephron tmg/sgfr was greater than juxtamedullary nephron tmg/sgfr. Juxtamedullary nephron function was measured by puncturing loops of Henle in the exposed papillae of small rats. Volume expansion increased sgfr without much effect on tmg in superficial nephrons while it decreased tmg without much effect on sgfr in deep nephrons. Physical changes produced by volume expansion seem to exert their greatest effect on proximal tubular function in the inner cortex. The increase in heterogeneity of glomerular-tubular balance could account for increased splay of glucose titration curves previously reported to accompany volume expansion.
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Silbernagl S, Deetjen P. Glycine reabsorption in rat proximal tubules. Microperfusion studies. Pflugers Arch 1971; 323:342-50. [PMID: 4323635 DOI: 10.1007/bf00592404] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Rasmussen SN. Renal reabsorption and metabolic conversion of galactose in the cat. ACTA PHYSIOLOGICA SCANDINAVICA 1970; 80:160-71. [PMID: 5475338 DOI: 10.1111/j.1748-1716.1970.tb04781.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Loeschke K, Baumann K, Renschler H, Ullrich KJ. [Differentiation of the active and passive components of D-glucose transport in the proximal tubule of rat kidney]. Pflugers Arch 1969; 305:118-38. [PMID: 5812807 DOI: 10.1007/bf00585840] [Citation(s) in RCA: 43] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Loeschke K, Baumann K. [Kinetic study of D-glucose reabsorption in the proximal convoluted tubule of rat kidney]. Pflugers Arch 1969; 305:139-54. [PMID: 5812808 DOI: 10.1007/bf00585841] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Rohde R, Deetjen P. [Glucose reabsorption in the rat kidney. Micropuncture analysis of tubular glucose concentration during free flow]. Pflugers Arch 1968; 302:219-32. [PMID: 5748556 DOI: 10.1007/bf00586727] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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