Evidence map›Paper›PMID 9686342›Full record

ArticleJournal of inherited metabolic disease1998

In vivo measurement of ureagenesis with stable isotopes.

M Yudkoff, Y Daikhin, X Ye, J M Wilson, M L Batshaw

Abstract read
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In one paragraph

Article in Journal of inherited metabolic disease, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed.

  1. The Role of Urea Cycle Functional Studies in Preclinical Research.Journal of inherited metabolic disease · 2026
    Review
  2. Article
  3. Review
  4. Flux analysis of inborn errors of metabolism.Journal of inherited metabolic disease · 2018
    Review
  5. Article
  6. Article
  7. Article
  8. Measuring in vivo ureagenesis with stable isotopes.Molecular genetics and metabolism · 2010
    Article
  9. Article
  10. Article
  11. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

M YudkoffDepartment of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, USA.
Y Daikhin
X Ye
J M Wilson
M L Batshaw

Funding

TRANSGENIC MOUSE MODELS OF MENTAL RETARDATIONP30HD026979 · NICHD · CHILDREN'S HOSP OF PHILADELPHIA · PI ROBERTS, TIMOTHY P · 1990 to 2015
$15.3M
ZIDOVUDINE VS 2',3'DIDEHYDRO-3'DEOXYTHYMIDINE IN CHILDRENM01RR000240 · NCRR · CHILDREN'S HOSP OF PHILADELPHIA · PI ALTSCHULER, STEVEN M · 1985 to 2006
$15.3M
STABLE ISOTOPE STUDIES OF GLUTAMIC ACID METABOLISMR01NS034900 · NINDS · CHILDREN'S HOSPITAL OF PHILADELPHIA · PI YUDKOFF, MARC · 1995 to 1998
–
NCRR NIH HHS 5MO1-RR00240NICHD NIH HHS P30-HD-26979NINDS NIH HHS NS-34900
6 · The paper itself

Abstract

We have utilized stable isotopes to measure in vivo rates of ureagenesis. In one testing procedure, 15NH4Cl was administered orally to controls and to heterozygotes for ornithine transcarbamylase deficiency. Controls produced [15N]urea at a rate that was greater than that of symptomatic carriers, but indistinguishable from that of asymptomatic carriers. In contrast, both symptomatic and asymptomatic heterozygotes produced [5-15N]glutamine more rapidly than the controls. Ureagenesis could also be measured by administering sodium [1-13C]acetate to a healthy adult and measuring subsequent formation of [13C]urea. The latter approach involves the use of isotope ratio mass spectrometry to determine isotopic abundance. This technique is much more sensitive than gas chromatography-mass spectrometry for the measurement of isotopic label, a consideration that makes the method more suitable for the study of subjects in whom ureagenesis is severely compromised, for example the human male neonate with a near complete deficiency of ornithine transcarbamylase.

Indexed as

Ornithine Carbamoyltransferase Deficiency DiseaseAdultAmino Acid Metabolism, Inborn ErrorsAmmonium ChlorideBreath TestsCarbon DioxideCarbon IsotopesFemaleGas Chromatography-Mass SpectrometryGenetic Carrier ScreeningGlutamineHumansInfant, NewbornMaleMass SpectrometryNitrogen IsotopesAmmonium ChlorideCarbon DioxideCarbon IsotopesGlutamineNitrogen IsotopesSodium AcetateUrea

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.