Evidence map›Paper›PMID 30775629›Full record

ArticleKidney international reports2019

Gene Expression Studies and Targeted Metabolomics Reveal Disturbed Serine, Methionine, and Tyrosine Metabolism in Early Hypertensive Nephrosclerosis.

Marius A Øvrehus, Per Bruheim, Wenjun Ju, Leila R Zelnick, Knut A Langlo, Kumar Sharma, Ian H de Boer, Stein I Hallan

Open access · goldAbstract read
In one paragraph

Article in Kidney international reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
2.1field-weighted citation impact, top 14% 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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.

  1. Pooled it
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  15. Renal metabolism and hypertension.Nature communications · 2021
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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

8 authors at 5 institutions in 2 countries.

Marius A ØvrehusDepartment of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
Per BruheimDepartment of Biotechnology and Food Science, Norwegian University of Science and Technology, Trondheim, Norway.
Wenjun JuDivision of Nephrology, Department of Medicine, University of Michigan, Ann Arbor, Michigan, USA.
Leila R ZelnickKidney Research Institute, University of Washington, Seattle, Washington, USA.
Knut A LangloDepartment of Nephrology, St Olav Hospital, Trondheim University Hospital, Trondheim, Norway.
Kumar SharmaUniversity of Texas Health San Antonio, San Antonio, Texas, USA.
Ian H de BoerKidney Research Institute, University of Washington, Seattle, Washington, USA.
Stein I HallanDepartment of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
St Olav's University Hospital · NOUniversity of Washington · USNorwegian University of Science and Technology · NOThe University of Texas at San Antonio · USUniversity of Michigan–Ann Arbor · US

Funding

Transform Dissemination and Implementation Science in CTSA ProgramsUL1TR002319 · NCATS · UNIVERSITY OF WASHINGTON · PI John K. Amory · 2017 to 2026
$100.0M
Institute of Translational Health SciencesUL1TR000423 · NCATS · UNIVERSITY OF WASHINGTON · PI DISIS, MARY L. · 2012 to 2016
$49.4M
Integrated Systems Biology Approach to Diabetic Microvascular ComplicationsR24DK082841 · NIDDK · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI ABCOUWER, STEVEN F, BROSIUS, FRANK C · 2008 to 2020
$13.1M
Novel Paradigms in Diabetic ComplicationsDP3DK094352 · NIDDK · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI SHARMA, KUMAR · 2011 to 2011
$6.0M
Insulin Resistance in Chronic Kidney DiseaseR01DK087726 · NIDDK · UNIVERSITY OF WASHINGTON · PI DE BOER, IAN H · 2010 to 2013
$1.9M
NCATS NIH HHS UL1 TR000423NCATS NIH HHS UL1 TR002319NIDDK NIH HHS DP3 DK094352NIDDK NIH HHS R01 DK087726NIDDK NIH HHS R24 DK082841
6 · The paper itself

Abstract

introductionHypertensive nephrosclerosis is among the leading causes of end-stage renal disease, but its pathophysiology is poorly understood. We wanted to explore early metabolic changes using gene expression and targeted metabolomics analysis.

methodsWe analyzed gene expression in kidneys biopsied from 20 patients with nephrosclerosis and 31 healthy controls with an Affymetrix array. Thirty-one amino acids were measured by liquid chromatography coupled with mass spectrometry (LC-MS) in urine samples from 62 patients with clinical hypertensive nephrosclerosis and 33 age- and sex-matched healthy controls, and major findings were confirmed in an independent cohort of 45 cases and 15 controls.

resultsAmino acid catabolism and synthesis were strongly underexpressed in hypertensive nephrosclerosis (13- and 7-fold, respectively), and these patients also showed gene expression patterns indicating decreased fatty acid oxidation (12-fold) and increased interferon gamma (10-fold) and cellular defense response (8-fold). Metabolomics analysis revealed significant distribution differences in 11 amino acids in hypertensive nephrosclerosis, among them tyrosine, phenylalanine, dopamine, homocysteine, and serine, with 30% to 70% lower urine excretion. These findings were replicated in the independent cohort. Integrated gene-metabolite pathway analysis showed perturbations of renal dopamine biosynthesis. There were also significant differences in homocysteine/methionine homeostasis and the serine pathway, which have strong influence on 1-carbon metabolism. Several of these disturbances could be interconnected through reduced regeneration of tetrahydrofolate and tetrahydrobiopterin.

conclusionEarly hypertensive nephrosclerosis showed perturbations of intrarenal biosynthesis of dopamine, which regulates natriuresis and blood pressure. There were also disturbances in serine/glycine and methionine/homocysteine metabolism, which may contribute to endothelial dysfunction, atherosclerosis, and renal fibrosis.

Indexed as

amino acidsgene expressionhypertensive nephropathymetabolomicsnephrosclerosis

Identifiers

PMID30775629
PMCPMC6365407
OpenAlexW2897089429

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.