Evidence map›Paper›PMID 33502933›Full record

ArticleAmerican journal of physiology. Lung cellular and molecular physiology2021

Glucose-6-phosphate dehydrogenase deficiency contributes to metabolic abnormality and pulmonary hypertension.

Mathews Valuparampil Varghese, Joel James, Olga Rafikova, Ruslan Rafikov

Open access · hybridAbstract read
In one paragraph

Article in American journal of physiology. Lung cellular and molecular physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
8.7field-weighted citation impact, top 2% 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

29 citing papers in PubMed, 2 syntheses or guidelines pooled it, 35 citations in OpenAlex.

  1. Pooled it
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  10. Metabolic Responses to Redox Stress in Vascular Cells.Antioxidants & redox signaling · 2024
    Review
  11. Circulating free heme induces cytokine storm and pulmonary hypertension through the MKK3/p38 axis.American journal of physiology. Lung cellular and molecular physiology · 2024
    Article
  12. Journal of the American Heart Association · 2024
    Article
  13. Observational
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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

4 authors at 1 institution in 1 country.

Mathews Valuparampil VargheseDivision of Endocrinology, Department of Medicine, University of Arizona College of Medicine, Tucson, Arizona.
Joel JamesDivision of Endocrinology, Department of Medicine, University of Arizona College of Medicine, Tucson, Arizona.
Olga RafikovaDivision of Endocrinology, Department of Medicine, University of Arizona College of Medicine, Tucson, Arizona.
Ruslan RafikovDivision of Endocrinology, Department of Medicine, University of Arizona College of Medicine, Tucson, Arizona.ORCID 0000-0001-5950-4076
University of Arizona · US

Funding

Anaplerotic reprogramming of endothelial cells in pulmonary hypertension.R01HL132918 · NHLBI · UNIVERSITY OF ARIZONA · PI RAFIKOV, RUSLAN · 2016 to 2025
$4.5M
Hemolysis and Free Heme Signaling in Pulmonary HypertensionR01HL151447 · NHLBI · UNIVERSITY OF ARIZONA · PI Ruslan Rafikov · 2020 to 2026
$4.3M
HMGBG1 and Gender Difference in Pulmonary Arterial HypertensionR01HL133085 · NHLBI · UNIVERSITY OF ARIZONA · PI RAFIKOVA, OLGA · 2016 to 2020
$1.9M
HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI) HL133085NHLBI NIH HHS R01 HL132918NHLBI NIH HHS R01 HL133085NHLBI NIH HHS R01 HL151447
6 · The paper itself

Abstract

We have previously reported that several patients with idiopathic pulmonary hypertension (PH) had different types of G6PD deficiency. However, the role of G6PD in PH is multifactorial because G6PD is involved in controlling oxidative stress, metabolic switch, and red blood cell fragility. To delineate the contribution of G6PD to PH pathogenesis, we utilized a mouse line with decreased expression of G6PD (10% from wild-type level). We confirmed that mice with G6PD deficiency develop spontaneous pulmonary hypertension with pulmonary artery and right heart remodeling. G6PD deficiency resulted in increased free hemoglobin and activation of the p38 pathway, which we recently reported induces the development of PH in the sugen/hypoxia model via endothelial barrier dysfunction. Metabolomics analysis of G6PD deficient mice indicates the switch to alternative metabolic fluxes that feed into the pentose phosphate pathway (PPP), resulting in the upregulation of oxidative stress, fatty acid pathway, and reduction in pyruvate production. Thus, G6PD deficiency did not reduce PPP flux that is important for proliferation but activated collateral pathways at the cost of increased oxidative stress. Indeed, we found the upregulation of myo-inositol oxidase, reduction in GSH/GSSG ratio, and increased nitration in the lungs of G6PD-deficient mice. Increased oxidative stress also results in the activation of PI3K, ERK1/2, and AMPK that contribute to the proliferation of pulmonary vasculature. Therefore, G6PD deficiency has a multimodal effect, including hemolysis, metabolic reprogramming, and oxidative stress leading to the PH phenotype in mice.

Indexed as

MetabolomeOxidative StressAnimalsCase-Control StudiesFemaleGlucosephosphate DehydrogenaseGlucosephosphate Dehydrogenase DeficiencyHemolysisHumansHypertension, PulmonaryMaleMiceMice, Inbred C3HMice, KnockoutOxidation-ReductionPulmonary ArteryGlucosephosphate Dehydrogenaseglycolysismetabolismoxidative stresspentose phosphate pathwaypulmonary hypertensionvascular proliferation

Identifiers

PMID33502933
PMCPMC8238156
OpenAlexW3121961381

What Socratic 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 Socratic graph.