Evidence map›Paper›PMID 1698710›Full record

ArticleImmunology1990

Human protectin (CD59), an 18,000-20,000 MW complement lysis restricting factor, inhibits C5b-8 catalysed insertion of C9 into lipid bilayers.

S Meri, B P Morgan, A Davies, R H Daniels, M G Olavesen, H Waldmann, P J Lachmann

Open access · greenAbstract read
In one paragraph

Article in Immunology, 1990. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 184 papers.

0numbers the graph read from it
0cells of the map it votes in
184citing papers in PubMed
9.4field-weighted citation impact, top 1% 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

184 citing papers in PubMed, 544 citations in OpenAlex.

  1. Trial
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  11. Complement updates in optic neuritis.Frontiers in neurology · 2025
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  18. CNS autoimmune response in the MAM/pilocarpine rat model of epileptogenic cortical malformation.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  19. Review
  20. Article

124 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

7 authors at 1 institution in 1 country.

S MeriMolecular Immunopathology Unit, Medical Research Council, Cambridge, U.K.
B P Morgan
A Davies
R H Daniels
M G Olavesen
H Waldmann
P J Lachmann
Medical Research Council · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

Human cells are relatively resistant to lysis by the homologous complement system. Here we describe the mechanism of action of a recently discovered and widely distributed 18,000-20,000 molecular weight (MW) membrane glycoprotein (CD59), which appears to act as a major protective element against complement-mediated lysis (hence called protectin). When incorporated into heterologous erythrocyte membranes, protectin efficiently prevented cell lysis by human serum. Neutralization with antibody of the naturally occurring protectin on human erythrocytes or on nucleated K562 cells increased their susceptibility to lysis by homologous complement. During complement activation, protectin became incorporated into the membrane attack complex (MAC). By interacting with newly exposed regions in the C5b-8 complex and in aggregating C9 it limited the number of C9 molecules associating with the C5b-8 complex to a C8:C9 ratio of 1:1.5 instead of a normal average of 1:3.5. The results demonstrate directly that protectin is a powerful inhibitor of complement cytolysis and acts by inhibiting the C5b-8 catalysed insertion of C9 into the lipid bilayer.

Indexed as

Antigens, DifferentiationCD59 AntigensComplement C9Complement Membrane Attack ComplexComplement System ProteinsErythrocyte MembraneErythrocytesHemolysisHumansMembrane GlycoproteinsMolecular WeightAntigens, DifferentiationCD59 Antigenscomplement C5b-8 complexComplement C9Complement Membrane Attack ComplexComplement System ProteinsMembrane Glycoproteins

Identifiers

PMID1698710
PMCPMC1384213
OpenAlexW1481229608

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.