Evidence map›Paper›PMID 22391631›Full record

ArticlePediatric research2012

Enteral leucine supplementation increases protein synthesis in skeletal and cardiac muscles and visceral tissues of neonatal pigs through mTORC1-dependent pathways.

Agus Suryawan, Roberto Murgas Torrazza, Maria C Gazzaneo, Renán A Orellana, Marta L Fiorotto, Samer W El-Kadi, Neeraj Srivastava, Hanh V Nguyen, Teresa A Davis

Open access · bronzeAbstract read
In one paragraph

Article in Pediatric research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
3.5field-weighted citation impact, top 7% 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

32 citing papers in PubMed, 57 citations in OpenAlex.

  1. Article
  2. Article
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  4. Review: Nutritional regulation of muscle growth in neonatal swine.Animal : an international journal of animal bioscience · 2023
    Review
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  7. Article
  8. Fermented Feed Modulates Meat Quality and Promotes the Growth ofAnimals : an open access journal from MDPI · 2020
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Impact of placental insufficiency on fetal skeletal muscle growth.Molecular and cellular endocrinology · 2016
    Review
  16. Article
  17. Article
  18. Article
  19. Impact of prolonged leucine supplementation on protein synthesis and lean growth in neonatal pigs.American journal of physiology. Endocrinology and metabolism · 2015
    Article
  20. 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

9 authors at 3 institutions in 1 country.

Agus SuryawanUnited States Department of Agriculture/Agricultural Research Service Children's Nutrition Research Center, Houston, Texas, USA.
Roberto Murgas Torrazza
Maria C Gazzaneo
Renán A Orellana
Marta L Fiorotto
Samer W El-Kadi
Neeraj Srivastava
Hanh V Nguyen
Teresa A Davis
Baylor College of Medicine · USAgricultural Research Service · USUnited States Department of Agriculture · US

Funding

Regulation of Neonatal Muscle Protein SynthesisR01AR044474 · NIAMS · BAYLOR COLLEGE OF MEDICINE · PI DAVIS, TERESA A · 1996 to 2012
$4.2M
DEVELOPMENTAL DETERMINANTS OF SKELETAL MUSCLE GROWTH POTENTIALR01AR046308 · NIAMS · BAYLOR COLLEGE OF MEDICINE · PI FIOROTTO, MARTA L · 2000 to 2011
$2.9M
Leucine Supplementation to Promote Lean Growth in Early LifeR01HD072891 · NICHD · BAYLOR COLLEGE OF MEDICINE · PI DAVIS, TERESA A · 2012 to 2015
$1.4M
Regulation of Protein Synthesis in Neonatal SepsisK08AR051563 · NIAMS · BAYLOR COLLEGE OF MEDICINE · PI ORELLANA, RENAN A · 2005 to 2009
$614k
NIAMS NIH HHS K08 AR051563NIAMS NIH HHS R01 AR044474NIAMS NIH HHS R01 AR046308NIAMS NIH HHS R01 AR44474NICHD NIH HHS R01 HD072891
6 · The paper itself

Abstract

introductionLeucine (Leu) activates mammalian target of rapamycin (mTOR) to upregulate protein synthesis (PS).

resultsPS in skeletal muscles, heart, liver, pancreas, and jejunum, but not kidney, were greater in low protein supplemented with Leu (LP+L) than LP, but lower than high protein (HP). In longissimus dorsi muscle, protein kinase B phosphorylation was similar in LP and LP+L, but lower than HP. Although less than HP, p70 ribosomal S6 kinase 1 (S6K1) and eukaryotic initiation factor (eIF) 4E binding protein 1 (4EBP1) association with regulatory associated protein of mammalian target of rapamycin was greater in LP+L than LP, resulting in higher S6K1 and 4EBP1 phosphorylation. Feeding LP+L vs. LP decreased 4EBP1·eIF4E and increased eIF4E·eIF4G formation, but not to HP. Similar results were obtained for S6K1 and 4EBP1 phosphorylation in gastrocnemius, masseter, heart, liver, pancreas, and jejunum, but not kidney. eIF2α and elongation factor 2 phosphorylation was unaffected by treatment. DICUSSION: Our results suggest that enteral Leu supplementation of a low protein diet enhances PS in most tissues through mTOR complex 1 pathways.

methodsTo examine enteral Leu effects on PS and signaling activation, 5-d-old piglets were fed for 24 h diets containing: (i) LP, (ii) LP+L, or (iii) HP.

Indexed as

Amino AcidsAnimalsAnimals, NewbornBlood GlucoseDietary SupplementsEnteral NutritionEukaryotic Initiation Factor-4EEukaryotic Initiation Factor-4GEukaryotic Initiation FactorsGlycolysisInsulinLeucineMuscle, SkeletalMyocardiumPhosphorylationProto-Oncogene Proteins c-aktAmino AcidsBlood GlucoseEukaryotic Initiation Factor-4EEukaryotic Initiation Factor-4GEukaryotic Initiation FactorsInsulinLeucineProto-Oncogene Proteins c-aktTOR Serine-Threonine Kinases

Identifiers

PMID22391631
PMCPMC3619200
OpenAlexW1985664628

What OpenQuestion holds

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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.