Effects of low [Ca2+] and La3+ on PAH transport by isolated perfused renal tubules

William H Dantzler, O. H. Brokl

Research output: Chapter in Book/Report/Conference proceedingChapter

5 Citations (Scopus)

Abstract

Effects of low medium calcium concentration and of lanthanum on p-aminohippurate (PAH) transport by isolated perfused snake (Thamnophis spp.) distal-proximal renal tubules were studied. Nominal removal of calcium from bath produced rapid, irreversible disruption of cells and depression of net PAH secretion (J(PAH)). However, nominal removal of calcium from lumen with calcium in bath reversibly depressed J(PAH) and apparent PAH permeability of luminal membrane without altering net fluid absorption (J(v)) or intracellular PAH concentration ([PAH](cell)). In the presence of calcium (1.8 mM), lanthanum (2 mM) in perfusate alone, in bath alone, or in both perfusate and bath reversibly depressed J(PAH), apparent PAH permeabilities of luminal and peritubular membranes, and initial rate of PAH transport into cells without altering [PAH](cell) or J(v). Variations in calcium concentration had little effect on depression of J(PAH) in sodium-free bath. These data suggest that calcium entry into cells, but possibly not cytosolic calcium concentration alone, is important for PAH transport from bath into cells and from cells into lumen and for normal passive permeability of peritubular membrane to PAH and that increased cytosolic calcium concentration is not primarily responsible for depression of J(PAH) in sodium-free medium.

Original languageEnglish (US)
Title of host publicationAmerican Journal of Physiology - Renal Fluid and Electrolyte Physiology
Volume15
Edition2
StatePublished - 1984

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p-Aminohippuric Acid
Kidney
Calcium
Baths
Lanthanum
Permeability
Membranes
Distal Kidney Tubule
Colubridae
Proximal Kidney Tubule

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Dantzler, W. H., & Brokl, O. H. (1984). Effects of low [Ca2+] and La3+ on PAH transport by isolated perfused renal tubules. In American Journal of Physiology - Renal Fluid and Electrolyte Physiology (2 ed., Vol. 15)

Effects of low [Ca2+] and La3+ on PAH transport by isolated perfused renal tubules. / Dantzler, William H; Brokl, O. H.

American Journal of Physiology - Renal Fluid and Electrolyte Physiology. Vol. 15 2. ed. 1984.

Research output: Chapter in Book/Report/Conference proceedingChapter

Dantzler, WH & Brokl, OH 1984, Effects of low [Ca2+] and La3+ on PAH transport by isolated perfused renal tubules. in American Journal of Physiology - Renal Fluid and Electrolyte Physiology. 2 edn, vol. 15.
Dantzler WH, Brokl OH. Effects of low [Ca2+] and La3+ on PAH transport by isolated perfused renal tubules. In American Journal of Physiology - Renal Fluid and Electrolyte Physiology. 2 ed. Vol. 15. 1984
Dantzler, William H ; Brokl, O. H. / Effects of low [Ca2+] and La3+ on PAH transport by isolated perfused renal tubules. American Journal of Physiology - Renal Fluid and Electrolyte Physiology. Vol. 15 2. ed. 1984.
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