Relation of potassium to urate accumulation by kidney slices from desert spiny lizards (Sceloporus magister)

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Abstract

1. 1. The relation of medium potassium concentration to urate accumulation by kidney slices from desert spiny lizards (Sceloporus magister) was studied. 2. 2. Incubation in 40 mM potassium caused a marked increase in urate accumulation. Preparation and incubation in potassium-free medium depressed, but did not eliminate, active urate accumulation. 3. 3. Incubation of potassium-depleted slices in media of increasing potassium concentration restored tissue potassium when medium potassium reached 40 mM but did not completely restore urate accumulation. 4. 4. These data suggest that severe depletion of potassium impairs mechanisms for both potassium and urate accumulation, and that the latter is not restored even when tissue potassium is restored. 5. 5. These results differ from those observed previously with kidney slices from domestic fowl and ophidian reptiles. Differences may be related to the membrane site of transport.

Original languageEnglish (US)
Pages (from-to)467-477
Number of pages11
JournalComparative Biochemistry and Physiology -- Part A: Physiology
Volume40
Issue number2
DOIs
StatePublished - Oct 1 1971

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Lizards
Uric Acid
Potassium
Kidney
Tissue
Reptiles
Poultry
Membranes

Keywords

  • desert spiny lizard Sceloporus magister
  • lizard kidney slices
  • Organic acid transport
  • potassium and urate transport
  • renal tubular transport
  • urate transport

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Biochemistry

Cite this

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abstract = "1. 1. The relation of medium potassium concentration to urate accumulation by kidney slices from desert spiny lizards (Sceloporus magister) was studied. 2. 2. Incubation in 40 mM potassium caused a marked increase in urate accumulation. Preparation and incubation in potassium-free medium depressed, but did not eliminate, active urate accumulation. 3. 3. Incubation of potassium-depleted slices in media of increasing potassium concentration restored tissue potassium when medium potassium reached 40 mM but did not completely restore urate accumulation. 4. 4. These data suggest that severe depletion of potassium impairs mechanisms for both potassium and urate accumulation, and that the latter is not restored even when tissue potassium is restored. 5. 5. These results differ from those observed previously with kidney slices from domestic fowl and ophidian reptiles. Differences may be related to the membrane site of transport.",
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N2 - 1. 1. The relation of medium potassium concentration to urate accumulation by kidney slices from desert spiny lizards (Sceloporus magister) was studied. 2. 2. Incubation in 40 mM potassium caused a marked increase in urate accumulation. Preparation and incubation in potassium-free medium depressed, but did not eliminate, active urate accumulation. 3. 3. Incubation of potassium-depleted slices in media of increasing potassium concentration restored tissue potassium when medium potassium reached 40 mM but did not completely restore urate accumulation. 4. 4. These data suggest that severe depletion of potassium impairs mechanisms for both potassium and urate accumulation, and that the latter is not restored even when tissue potassium is restored. 5. 5. These results differ from those observed previously with kidney slices from domestic fowl and ophidian reptiles. Differences may be related to the membrane site of transport.

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