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The Non-ureogenic Stinging Catfish, Heteropneustes fossilis, Actively Excretes Ammonia With the Help of Na⁺/K⁺-ATPase When Exposed to Environmental Ammonia.

ABSTRACT: The stinging catfish, Heteropneustes fossilis, can tolerate high concentrations of environmental ammonia. Previously, it was regarded as ureogenic, having a functional ornithine-urea cycle (OUC) that could be up-regulated during ammonia-loading. However, contradictory results indicated that increased urea synthesis and switching to ureotelism could not explain its high ammonia tolerance. Hence, we re-examined the effects of exposure to 30 mmol l^-1 NH₄Cl on its ammonia and urea excretion rates, and its tissue ammonia and urea concentrations. Our results confirmed that H. fossilis did not increase urea excretion or accumulation during 6 days of ammonia exposure, and lacked detectable carbamoyl phosphate synthetase I or III activity in its liver. However, w

SUBMITTER: Chew SF

PROVIDER: S-EPMC6987325 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Dataset Information

The Non-ureogenic Stinging Catfish, Heteropneustes fossilis, Actively Excretes Ammonia With the Help of Na⁺/K⁺-ATPase When Exposed to Environmental Ammonia.

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Dataset Information

The Non-ureogenic Stinging Catfish, Heteropneustes fossilis, Actively Excretes Ammonia With the Help of Na+/K+-ATPase When Exposed to Environmental Ammonia.

OmicsDI is part of the ELIXIR infrastructure

Tweets

The Non-ureogenic Stinging Catfish, Heteropneustes fossilis, Actively Excretes Ammonia With the Help of Na⁺/K⁺-ATPase When Exposed to Environmental Ammonia.