Evidence map›Paper›PMID 33822775›Full record

ArticleJCI insight2021

Coordination of asparagine uptake and asparagine synthetase expression modulates CD8+ T cell activation.

Helen Carrasco Hope, Rebecca J Brownlie, Christopher M Fife, Lynette Steele, Mihaela Lorger, Robert J Salmond

Open access · goldAbstract read
In one paragraph

Article in JCI insight, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
2.9field-weighted citation impact, top 8% 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

36 citing papers in PubMed, 56 citations in OpenAlex.

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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

6 authors at 1 institution in 1 country.

Helen Carrasco Hope
Rebecca J Brownlie
Christopher M Fife
Lynette Steele
Mihaela Lorger
Robert J Salmond
St James's University Hospital · GB

Funding

Medical Research Council MR/S002057/1
6 · The paper itself

Abstract

T cell receptor (TCR) triggering by antigen results in metabolic reprogramming that, in turn, facilitates the exit of T cells from quiescence. The increased nutrient requirements of activated lymphocytes are met, in part, by upregulation of cell surface transporters and enhanced uptake of amino acids, fatty acids, and glucose from the environment. However, the role of intracellular pathways of amino acid biosynthesis in T cell activation is relatively unexplored. Asparagine is a nonessential amino acid that can be synthesized intracellularly through the glutamine-hydrolyzing enzyme asparagine synthetase (ASNS). We set out to define the requirements for uptake of extracellular asparagine and ASNS activity in CD8+ T cell activation. At early time points of activation in vitro, CD8+ T cells expressed little or no ASNS, and, as a consequence, viability and TCR-stimulated growth, activation, and metabolic reprogramming were substantially impaired under conditions of asparagine deprivation. At later time points (more than 24 hours of activation), TCR-induced mTOR-dependent signals resulted in ASNS upregulation that endowed CD8+ T cells with the capacity to function independently of extracellular asparagine. Thus, our data suggest that the coordinated upregulation of ASNS expression and uptake of extracellular asparagine is involved in optimal T cell effector responses.

Indexed as

AnimalsAsparagineAspartate-Ammonia LigaseCD8-Positive T-LymphocytesCell SurvivalIn Vitro TechniquesLymphocyte ActivationMechanistic Target of Rapamycin Complex 1MiceProto-Oncogene Proteins c-mycReceptors, Antigen, T-CellSignal TransductionAsparagineAspartate-Ammonia LigaseMechanistic Target of Rapamycin Complex 1Myc protein, mouseProto-Oncogene Proteins c-mycReceptors, Antigen, T-CellAmino acid metabolismImmunologyT cells

Identifiers

PMID33822775
PMCPMC8262305
OpenAlexW3141076164

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.