Evidence map›Paper›PMID 17954690›Full record

ArticleAntimicrobial agents and chemotherapy2008

Failures in clinical treatment of Staphylococcus aureus Infection with daptomycin are associated with alterations in surface charge, membrane phospholipid asymmetry, and drug binding.

Tiffanny Jones, Michael R Yeaman, George Sakoulas, Soo-Jin Yang, Richard A Proctor, Hans-Georg Sahl, Jacques Schrenzel, Yan Q Xiong, Arnold S Bayer

Abstract read
In one paragraph

Article in Antimicrobial agents and chemotherapy, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 181 papers.

0numbers the graph read from it
0cells of the map it votes in
181citing papers in PubMed
10.2field-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

181 citing papers in PubMed, 324 citations in OpenAlex.

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121 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

9 authors at 7 institutions in 3 countries.

Tiffanny JonesLos Angeles Biomedical Research Institute at Harbor-UCLA, 1124 West Carson Street, Bldg. RB2, Room 225, Torrance, CA 90502, USA.
Michael R Yeaman
George Sakoulas
Soo-Jin Yang
Richard A Proctor
Hans-Georg Sahl
Jacques Schrenzel
Yan Q Xiong
Arnold S Bayer
The Lundquist Institute · USHarbor–UCLA Medical Center · USNew York Medical College · USUCLA Medical Center · USUniversity Hospital of Geneva · CHUniversity of Bonn · DEUniversity of Wisconsin–Madison · US

Funding

Staphylococcal Adaptations to Platelet Microbicidal ProteinR01AI039108 · NIAID · LUNDQUIST INSTITUTE FOR BIOMEDICAL INNOVATION AT HARBOR-UCLA MEDICAL CENTER · PI BAYER, ARNOLD S · 1997 to 2016
$5.1M
DETERMINANTS IN PLATELET MICROBICIDAL PROTEINSR01AI048031 · NIAID · LA BIOMED RES INST/ HARBOR UCLA MED CTR · PI YEAMAN, MICHAEL R · 2000 to 2004
$1.6M
ELECTRON TRANSPORT VARIANTS IN STAPHYLOCOCCAL DISEASER01AI042072 · NIAID · UNIVERSITY OF WISCONSIN MADISON · PI PROCTOR, RICHARD A · 1998 to 2001
$385k
NIAID NIH HHS AI-18031NIAID NIH HHS AI-39108NIAID NIH HHS AI42072NIAID NIH HHS R01 AI039108NIAID NIH HHS R01 AI042072NIAID NIH HHS R01 AI048031
6 · The paper itself

Abstract

Increasingly frequent reports have described the in vivo loss of daptomycin susceptibility in association with clinical treatment failures. The mechanism(s) of daptomycin resistance is not well understood. We studied an isogenic set of Staphylococcus aureus isolates from the bloodstream of a daptomycin-treated patient with recalcitrant endocarditis in which serial strains exhibited decreasing susceptibility to daptomycin. Since daptomycin is a membrane-targeting lipopeptide, we compared a number of membrane parameters in the initial blood isolate (parental) with those in subsequent daptomycin-resistant strains obtained during treatment. In comparison to the parental strain, resistant isolates demonstrated (i) enhanced membrane fluidity, (ii) increased translocation of the positively charged phospholipid lysyl-phosphotidylglycerol to the outer membrane leaflet, (iii) increased net positive surface charge (P < 0.05 versus the parental strain), (iv) reduced susceptibility to daptomycin-induced depolarization, permeabilization, and autolysis (P < 0.05 versus the parental strain), (v) significantly lower surface binding of daptomycin (P < 0.05 versus the parental strain), and (vi) increased cross-resistance to the cationic antimicrobial host defense peptides human neutrophil peptide 1 (hNP-1) and thrombin-induced platelet microbicidal protein 1 (tPMP-1). These data link distinct changes in membrane structure and function with in vivo development of daptomycin resistance in S. aureus. Moreover, the cross-resistance to hNP-1 and tPMP-1 may also impact the capacity of these daptomycin-resistant organisms to be cleared from sites of infection, particularly endovascular foci.

Indexed as

Anti-Bacterial AgentsCell MembraneDaptomycinDrug Resistance, BacterialCell Membrane PermeabilityHumansMicrobial Sensitivity TestsPhospholipidsStaphylococcal InfectionsStaphylococcus aureusTreatment FailureAnti-Bacterial AgentsDaptomycinPhospholipids

Identifiers

PMID17954690
PMCPMC2223911
OpenAlexW2148954461

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.