RGD Reference Report - Arginine transport is augmented, through modulation of cationic amino acid transporter-1, in obstructive uropathy in rats. - Rat Genome Database

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Arginine transport is augmented, through modulation of cationic amino acid transporter-1, in obstructive uropathy in rats.

Authors: Schwartz, IF  Davidovitz, A  Chernichovski, T  Levin-Iaina, N  Guzner-Gur, H  Levo, Y  Schwartz, D 
Citation: Schwartz IF, etal., Kidney Blood Press Res. 2008;31(3):210-6. Epub 2008 Jun 14.
RGD ID: 4143282
Pubmed: PMID:18552509   (View Abstract at PubMed)
DOI: DOI:10.1159/000139617   (Journal Full-text)

BACKGROUND: The decrease in glomerular filtration rate (GFR), which is characteristic of obstructive uropathy, was suggested to be associated with attenuated nitric oxide (NO) generation. Since availability of L-arginine, the sole precursor for NO, governs NO synthesis, we aimed to determine the role of glomerular arginine transport in rats subjected to 24 h of bilateral ureteral ligation (BUO). METHODS: Glomerular arginine transport was measured by uptake of radiolabeled arginine ([(3)H]-L-arginine), cationic amino acid transporters (CAT)-1 and -2 and arginases I and II mRNA expression were determined using reverse transcription-polymerase chain reaction. CAT-1, arginase I, and arginase II protein contents were evaluated by Western blotting. RESULTS: L-Arginine transport by freshly harvested glomeruli from BUO rats was significantly augmented than in controls. The aforementioned findings were associated with a significant increase in glomerular CAT-1 mRNA expression, while CAT-2 mRNA was unchanged. Western blotting demonstrated a significant increase in CAT-1 abundance in BUO. Expression of both glomerular arginase I and II mRNA and protein content were significantly elevated in BUO. CONCLUSIONS: BUO induces an increase in glomerular arginine transport via upregulation of CAT-1, probably due to increase in arginine utilization by a non-NO pathway.

RGD Manual Disease Annotations    Click to see Annotation Detail View

Objects Annotated

Genes (Rattus norvegicus)
Arg1  (arginase 1)
Arg2  (arginase 2)

Genes (Mus musculus)
Arg1  (arginase, liver)
Arg2  (arginase type II)

Genes (Homo sapiens)
ARG1  (arginase 1)
ARG2  (arginase 2)


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