Evidence map›Paper›PMID 20688727›Full record

ArticleInvestigative ophthalmology & visual science2010

Decay accelerating factor (CD55)-mediated attenuation of complement: therapeutic implications for age-related macular degeneration.

Kelly N Ma, Siobhan M Cashman, J Harry Sweigard, Rajendra Kumar-Singh

Open access · bronzeAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 13% 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

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.

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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.

Kelly N MaDepartment of Ophthalmology, Tufts University School of Medicine, Boston, MA 02111, USA.
Siobhan M Cashman
J Harry Sweigard
Rajendra Kumar-Singh
Tufts University · US

Funding

VP22 AND TAT mediated gene therapy for the CNSR01EY014991 · NEI · UNIVERSITY OF UTAH · PI KUMAR-SINGH, RAJENDRA · 2004 to 2009
$1.4M
NEI NIH HHS EY013887NEI NIH HHS EY014991NEI NIH HHS R01 EY014991
6 · The paper itself

Abstract

purposeSequence variations in complement proteins are associated with age-related macular degeneration (AMD). The terminal pathway of complement results in the formation of the membrane attack complex (MAC) on the cell surface, resulting in their lysis. MAC has been documented on the retinal pigment epithelium (RPE), choroidal blood vessels, and drusen of AMD eyes. Here the investigators test the hypothesis that increasing the expression of decay accelerating factor (CD55) on RPE cells may result in reduced MAC-mediated damage.

methodsThe investigators constructed a recombinant adenovirus expressing human CD55 (AdCAGCD55). Mouse hepatocytes were infected with AdCAGCD55 or negative controls and subsequently incubated with normal human serum (NHS). Cell lysis and MAC formation were measured by FACS and immunocytochemistry, respectively. Adult mice were injected in the subretinal space with either AdCAGCD55 or controls; after 1 week of CD55 transgene expression, the eyecups were excised, challenged with NHS, and quantified for human MAC formation.

resultsControl-infected or uninfected mouse hepatocytes lyse at a rate of 93% and 94%, respectively. AdCAGCD55- infected mouse hepatocytes lyse at a rate of 29%. Lysis was confirmed to occur in the presence of MAC, which was reduced by 67% when cells were infected by AdCAGCD55. Mice injected in the subretinal space with AdCAGCD55 exhibited a 55.7% reduction in MAC formation on the RPE relative to controls.

conclusionsAdenovirus-mediated delivery of hCD55 to murine RPE confers protection against human complement. The investigators propose that the expression of hCD55 on RPE cells warrants investigation as a potential therapy for AMD.

Indexed as

Genetic TherapyAdenoviridaeAnimalsBlotting, WesternCD55 AntigensCell LineComplement Membrane Attack ComplexComplement System ProteinsFlow CytometryGene ExpressionGenetic VectorsHemolysisHepatocytesHumansImmunohistochemistryMacular DegenerationCD55 AntigensComplement Membrane Attack ComplexComplement System Proteins

Identifiers

PMID20688727
PMCPMC3055776
OpenAlexW2000069443

What OpenQuestion 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 OpenQuestion graph.