Evidence map›Paper›PMID 23232640›Full record

ArticleDiabetologia2013

The role of arginase I in diabetes-induced retinal vascular dysfunction in mouse and rat models of diabetes.

S C Elms, H A Toque, M Rojas, Z Xu, R W Caldwell, R B Caldwell

Open access · bronzeAbstract read
In one paragraph

Article in Diabetologia, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 10% 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

46 citing papers in PubMed, 1 synthesis or guideline pooled it, 64 citations in OpenAlex.

  1. Pooled it
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  14. Metabolomics Analyses of Mouse Retinas in Oxygen-Induced Retinopathy.Investigative ophthalmology & visual science · 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

6 authors at 1 institution in 1 country.

S C ElmsVascular Biology Center, Georgia Health Sciences University, 1459 Laney Walker Boulevard, Augusta, GA 30912, USA.
H A Toque
M Rojas
Z Xu
R W Caldwell
R B Caldwell
Augusta University Health · US

Funding

Cellular Mechanisms of Retinopathy: Role of ArginaseR01EY011766 · NEI · MEDICAL COLLEGE OF GEORGIA (MCG) · PI CALDWELL, ROBERT WILLIAM, CALDWELL, RUTH B · 1998 to 2021
$6.7M
BLOOD/RETINAL BARRIER CHANGES IN RETINOPATHYR01EY004618 · NEI · UNIVERSITY OF TENNESSEE HEALTH SCI CTR · PI CALDWELL, RUTH B · 1985 to 2010
$3.0M
L-arginine metabolism in diabetes-induced coronary dysfunctionR01HL070215 · NHLBI · MEDICAL COLLEGE OF GEORGIA (MCG) · PI CALDWELL, ROBERT WILLIAM · 2002 to 2011
$2.3M
Novel Strategies for prevention of diabetic vascular dysfunction.R24DK094765 · NIDDK · AUGUSTA UNIVERSITY · PI CALDWELL, ROBERT WILLIAM, CALDWELL, RUTH B · 2012 to 2012
$444k
Mechanisms of Diabetic Retinopathy: Oxidative Stress and InflammationI01BX001233 · VA · CHARLIE NORWOOD VA MEDICAL CENTER · PI CALDWELL, RUTH B · 2012 to 2015
–
BLRD VA I01 BX001233NEI NIH HHS R01 EY004618NEI NIH HHS R01 EY011766NEI NIH HHS R01-EY04618NEI NIH HHS R01-EY11766NHLBI NIH HHS R01 HL070215NHLBI NIH HHS R01-HL70215NIDDK NIH HHS R24 DK094765
6 · The paper itself

Abstract

aims/hypothesisA reduction in retinal blood flow occurs early in diabetes and is likely to be involved in the development of diabetic retinopathy. We hypothesise that activation of the arginase pathway could have a role in the vascular dysfunction of diabetic retinopathy.

methodsExperiments were performed using a mouse and rat model of streptozotocin (STZ)-induced diabetes for in vivo and ex vivo analysis of retinal vascular function. For in vivo studies, mice were infused with the endothelial-dependent vasodilator acetylcholine (ACh) or the endothelial-independent vasodilator sodium nitroprusside (SNP), and vasodilation was assessed using a fundus microscope. Ex vivo assays included pressurised vessel myography, western blotting and arginase activity measurements.

resultsACh-induced retinal vasodilation was markedly impaired in diabetic mice (40% of control values), whereas SNP-induced dilation was not altered. The diabetes-induced vascular dysfunction was markedly blunted in mice lacking one copy of the gene encoding arginase I and in mice treated with the arginase inhibitor 2(S)-amino-6-boronohexanoic acid. Ex vivo studies performed using pressure myography and central retinal arteries isolated from rats with STZ-induced diabetes showed a similar impairment of endothelial-dependent vasodilation that was partially blunted by pretreatment of the isolated vessels with another arginase inhibitor, (S)-2-boronoethyl-L-cysteine. The diabetes-induced vascular alterations were associated with significant increases in both arginase I protein levels and total arginase activity. CONCLUSIONS/

interpretationThese results indicate that, in the mouse and rat model, diabetes-induced increases in arginase I were involved in the diabetes-induced impairment of retinal blood flow by a mechanism involving vascular endothelial cell dysfunction.

Indexed as

AcetylcholineAnimalsArginaseBlotting, WesternDiabetes Mellitus, ExperimentalMaleMiceMice, Inbred C57BLNitroprussideRatsRats, Sprague-DawleyRetinaVasodilationVasodilator AgentsAcetylcholineArg1 protein, mouseArginasearginase I, ratNitroprussideVasodilator Agents

Identifiers

PMID23232640
PMCPMC3565067
OpenAlexW2129422669

What OpenQuestion holds

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Registered trials

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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.