Evidence map›Paper›PMID 28546457›Full record

ReviewThe Biochemical journal2017

Amino acid homeostasis and signalling in mammalian cells and organisms.

Stefan Bröer, Angelika Bröer

Open access · hybridAbstract readComparative StudyReview
In one paragraph

Review in The Biochemical journal, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 252 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
252citing papers in PubMed, 2 pooled it
39.9field-weighted citation impact, top 1% 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

252 citing papers in PubMed, 2 syntheses or guidelines pooled it, 489 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Nutrients · 2024
    Trial
  4. GutGut microbes · 2026
    Article
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192 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

2 authors at 1 institution in 1 country.

Stefan BröerResearch School of Biology, Australian National University, Linnaeus Way 134, Canberra, ACT 2601, Australia stefan.broeer@anu.edu.au.
Angelika BröerResearch School of Biology, Australian National University, Linnaeus Way 134, Canberra, ACT 2601, Australia.
Australian National University · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Cells have a constant turnover of proteins that recycle most amino acids over time. Net loss is mainly due to amino acid oxidation. Homeostasis is achieved through exchange of essential amino acids with non-essential amino acids and the transfer of amino groups from oxidised amino acids to amino acid biosynthesis. This homeostatic condition is maintained through an active mTORC1 complex. Under amino acid depletion, mTORC1 is inactivated. This increases the breakdown of cellular proteins through autophagy and reduces protein biosynthesis. The general control non-derepressable 2/ATF4 pathway may be activated in addition, resulting in transcription of genes involved in amino acid transport and biosynthesis of non-essential amino acids. Metabolism is autoregulated to minimise oxidation of amino acids. Systemic amino acid levels are also tightly regulated. Food intake briefly increases plasma amino acid levels, which stimulates insulin release and mTOR-dependent protein synthesis in muscle. Excess amino acids are oxidised, resulting in increased urea production. Short-term fasting does not result in depletion of plasma amino acids due to reduced protein synthesis and the onset of autophagy. Owing to the fact that half of all amino acids are essential, reduction in protein synthesis and amino acid oxidation are the only two measures to reduce amino acid demand. Long-term malnutrition causes depletion of plasma amino acids. The CNS appears to generate a protein-specific response upon amino acid depletion, resulting in avoidance of an inadequate diet. High protein levels, in contrast, contribute together with other nutrients to a reduction in food intake.

Indexed as

DietHomeostasisModels, BiologicalSignal TransductionActivating Transcription Factor 4Amino AcidsAnimalsAppetite RegulationAutophagyBiological TransportCentral Nervous SystemFastingGene Expression RegulationHumansMalnutritionMechanistic Target of Rapamycin Complex 1Activating Transcription Factor 4Amino AcidsEIF2AK4 protein, humanMechanistic Target of Rapamycin Complex 1Multiprotein ComplexesProtein Serine-Threonine KinasesTOR Serine-Threonine Kinasesamino acid metabolismamino acid transportersstarvation signalling

Identifiers

PMID28546457
PMCPMC5444488
OpenAlexW2617696743

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.