Evidence map›Paper›PMID 7693594›Full record

ArticleInfection and immunity1993

Differential protein expression and surface presentation generate high-frequency antigenic variation in Mycoplasma fermentans.

P M Theiss, M F Kim, K S Wise

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
2.8field-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

14 citing papers in PubMed, 36 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

3 authors at 1 institution in 1 country.

P M TheissDepartment of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia 65212.
M F Kim
K S Wise
University of Missouri · US

Funding

MOLECULAR ASPECTS OF MICROBIAL PATHOGENESIST32AI007276 · NIAID · UNIVERSITY OF MISSOURI-COLUMBIA · PI SMITH, ARNOLD LEE · 1987 to 2001
$312k
SURFACE MEMBRANE ANTIGENS OF AIDS-ASSOCIATED MYCOPLASMASR01AI032219 · NIAID · UNIVERSITY OF MISSOURI-COLUMBIA · PI WISE, KIM S. · 1992 to 2000
$240k
NIAID NIH HHS AI32219NIAID NIH HHS T32 AI07276
6 · The paper itself

Abstract

Mycoplasma fermentans, a wall-less prokaryote, is currently under investigation as a potential human pathogen. Recently, several surface lipoproteins have been shown to vary in expression between M. fermentans strains. Using specific antibodies to these lipoproteins, we investigated the extent and nature of antigenic variation within this species. Immunoscreening of type strain PG18 agar-grown colonies revealed marked heterogeneity in expression of distinct surface lipoproteins. Subsequent isolation and propagation of clonal isolates established isogenic lineages which displayed high-frequency (10(-2) to 10(-5) per generation) antigenic phase variation. [35S]cysteine-labeled protein profiles and Western immunoblots of phase-variant clones showed that several distinct integral membrane proteins undergo noncoordinate variation in expression. In addition to differential expression of epitope-bearing lipoproteins, differential accessibility of epitopes to antibodies was also documented as a mechanism generating surface phenotypic variation. Examination of one strain-variant antigen showed high-frequency phase variation to underlie previously observed antigenic differences between strains of this species. Thus, M. fermentans has a complex system capable of creating rapid changes in surface mosaics. This may profoundly affect mycoplasma-host interactions and may limit the methods by which populations of M. fermentans may be studied in vivo.

Indexed as

Antigenic VariationAntibodies, MonoclonalAntigens, BacterialBacterial ProteinsCell MembraneEpitopesGene ExpressionHumansMycoplasma fermentansSpecies SpecificityAntibodies, MonoclonalAntigens, BacterialBacterial ProteinsEpitopes

Identifiers

PMID7693594
PMCPMC281291
OpenAlexW2107641291

What OpenQuestion holds

Textmetadata
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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.