Evidence map›Paper›PMID 19104923›Full record

ReviewMetabolic brain disease2009

Signaling factors in the mechanism of ammonia neurotoxicity.

M D Norenberg, K V Rama Rao, A R Jayakumar

Abstract readReview
PubMed Publisher
In one paragraph

Review in Metabolic brain disease, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed
5.0field-weighted citation impact, top 4% of its field
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

62 citing papers in PubMed, 132 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Effect of berrycactus fruit (Open life sciences · 2023
    Article
  7. Hyperammonemia in Inherited Metabolic Diseases.Cellular and molecular neurobiology · 2022
    Review
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. The role of Branched Chain Amino Acids in the treatment of hepatic Encephalopathy.Journal of clinical and experimental hepatology · 2018
    Review
  17. Hyperammonemia in Hepatic Encephalopathy.Journal of clinical and experimental hepatology · 2018
    Review
  18. Article
  19. Article
  20. Ammonia toxicity: from head to toe?Metabolic brain disease · 2017
    Review

2 more citing papers are in PubMed but not listed here.

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

3 authors at 2 institutions in 1 country.

M D NorenbergDepartment of Pathology (D-33), University of Miami School of Medicine, P.O. Box 016960, Miami, FL 33101, USA. mnorenbe@med.miami.edu
K V Rama Rao
A R Jayakumar
University of Miami · USVeterans Health Administration · US

Funding

The Permeability Transition in Hepatic EncephalopathyR01DK063311 · NIDDK · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI NORENBERG, MICHAEL DAVID · 2003 to 2012
$1.8M
NIDDK NIH HHS DK063311
6 · The paper itself

Abstract

Mechanisms involved in hepatic encephalopathy (HE) still remain poorly understood. It is generally accepted that ammonia plays a major role in this disorder, and that astrocytes represent the principal target of ammonia neurotoxicity. In recent years, studies from several laboratories have uncovered a number of factors and pathways that appear to be critically involved in the pathogenesis of this disorder. Foremost is oxidative and nitrosative stress (ONS), which is largely initiated by an ammonia-induced increase in intracellular Ca(2+). Such increase in Ca(2+) activates a number of enzymes that promote the synthesis of reactive oxygen-nitrogen species, including constitutive nitric oxide synthase, NADPH oxidase and phospholipase A2. ONS subsequently induces the mitochondrial permeability transition, and activates mitogen-activated protein kinases and the transcription factor, nuclear factor-kappaB (NF-kappaB). These factors act to generate additional reactive oxygen-nitrogen species, to phosphorylate various proteins and transcription factors, and to cause mitochondrial dysfunction. This article reviews the role of these factors in the mechanism of HE and ammonia toxicity with a focus on astrocyte swelling and glutamate uptake, which are important consequences of ammonia neurotoxicity. These pathways and factors provide attractive targets for identifying agents potentially useful in the therapy of HE and other hyperammonemic disorders.

Indexed as

AmmoniaAnimalsBrainBrain EdemaCalcium SignalingHepatic EncephalopathyHumansMitochondriaNeurotoxinsOxidative StressReactive Oxygen SpeciesSignal TransductionAmmoniaNeurotoxinsReactive Oxygen Species

Identifiers

PMID19104923
OpenAlexW1989953010

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.