Evidence map›Paper›PMID 19074809›Full record

ArticleInvestigative ophthalmology & visual science2009

Retinal ion regulation in a mouse model of diabetic retinopathy: natural history and the effect of Cu/Zn superoxide dismutase overexpression.

Bruce A Berkowitz, Marius Gradianu, David Bissig, Timothy S Kern, Robin Roberts

Open access · greenAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed
3.6field-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

63 citing papers in PubMed, 77 citations in OpenAlex.

  1. Trial
  2. Explaining Retinal Susceptibility to Diabetes Through Photoreceptor Biology.International journal of molecular sciences · 2026
    Review
  3. Theophylline Inhibits Capillary Degeneration in Early Diabetic Retinopathy.Investigative ophthalmology & visual science · 2026
    Article
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  19. The MScientific reports · 2019
    Article
  20. Review

3 more citing papers are in PubMed but not listed here.

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

5 authors at 3 institutions in 2 countries.

Bruce A BerkowitzDepartment of Anatomy and Cell Biology, Wayne State University, Detroit, Michigan 48201, USA. baberko@med.wayne.edu
Marius Gradianu
David Bissig
Timothy S Kern
Robin Roberts
Institute of Cell Biology and Neurobiology · ITCase Western Reserve University · USWayne State University · US

Funding

STUDY OF DIABETIC RETINOPATHYR01EY000300 · NEI · UNIVERSITY OF WISCONSIN MADISON · PI KERN, TIMOTHY S · 1985 to 2013
$4.7M
NMR STUDIES OF PRERETINAL NEOVASCULARIZATIONR01EY010221 · NEI · WAYNE STATE UNIVERSITY · PI BERKOWITZ, BRUCE A. · 1995 to 2001
$421k
Study of diabetic retinopathyR56EY000300 · NEI · CASE WESTERN RESERVE UNIVERSITY · PI KERN, TIMOTHY S · 2009 to 2009
$353k
NEI NIH HHS EY00300NEI NIH HHS EY010221NEI NIH HHS R01 EY000300NEI NIH HHS R01 EY010221NEI NIH HHS R56 EY000300
6 · The paper itself

Abstract

purposeTo test the hypotheses that manganese-enhanced MRI (MEMRI) is useful in evaluating intraretinal ion dysregulation in wild-type (WT) and Cu/Zn superoxide dismutase (SOD1) overexpressor mice.

methodsCentral intraretinal ion activity and retinal thickness were measured from high-resolution data of light- and dark-adapted WT C57BL/6 mice (to gauge MEMRI sensitivity to normal visual processing in mice) and dark-adapted diabetic and nondiabetic WT and Cu/Zn superoxide dismutase overexpressor (SOD1OE) mice. Glycated hemoglobin and retinal vascular histopathology were also determined.

resultsIn WT mice, light adaptation reduced outer retinal manganese uptake compared with that in dark adaptation; no effect on inner retinal uptake was found. In diabetic WT mice, intraretinal manganese uptake became subnormal between 1.5 and 4 months of diabetes onset and then relatively increased. Central retinal thickness, as determined with MEMRI, decreased as a function of age in diabetic mice but remained constant in control mice. Nondiabetic SOD1OE mice had normal retinal manganese uptake but subnormal retinal thickness and supernormal acellular capillary density. At 4.2 months of diabetes, SOD1OE mice had normal manganese uptake and no further thinning; acellular capillaries frequency did not increase by 9 to 10 months of diabetes.

conclusionsIn emerging diabetic retinopathy, MEMRI provided an analytic measure of an ionic dysregulatory pattern that was sensitive to SOD1 overexpression. The potential benefit of SOD1 overexpression to inhibit retinal abnormality in this model is limited by the retinal and vascular degeneration that develops independently of diabetes.

Indexed as

AnimalsBiological Transport, ActiveDark AdaptationDiabetes Mellitus, ExperimentalDiabetic RetinopathyFemaleGene Expression Regulation, EnzymologicIon ChannelsIon TransportLightMagnetic Resonance ImagingMaleManganeseMiceMice, Inbred C57BLMice, TransgenicIon ChannelsManganeseSod1 protein, mouseSuperoxide DismutaseSuperoxide Dismutase-1

Identifiers

PMID19074809
PMCPMC2688071
OpenAlexW2052529618

What OpenQuestion holds

Textmetadata
LicenceTDM
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.