Evidence map›Paper›PMID 22870212›Full record

Trial reportPloS one2012

Detection of microbial translocation in HIV and SIV infection using the Limulus amebocyte lysate assay is masked by serum and plasma.

Ashwin Balagopal, Lucio Gama, Veronica Franco, Julia N Russell, Jeffrey Quinn, Yvonne Higgins, Laura M Smeaton, Janice E Clements, David L Thomas, Amita Gupta and 1 more

Open access · goldAbstract readClinical Trial
In one paragraph

Trial report in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.1field-weighted citation impact, top 14% 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

20 citing papers in PubMed, 36 citations in OpenAlex.

  1. Systemic cytokine and interferon responsiveness Patterns in HIV and HCV mono and co-infections.Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research · 2014
    Trial
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  4. Plasma Inflammatory Biomarkers Associated with Advanced Liver Fibrosis in HIV-HCV-Coinfected Individuals.International journal of environmental research and public health · 2020
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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

11 authors at 3 institutions in 1 country.

Ashwin BalagopalDepartment of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America. abalago1@jhmi.edu
Lucio Gama
Veronica Franco
Julia N Russell
Jeffrey Quinn
Yvonne Higgins
Laura M Smeaton
Janice E Clements
David L Thomas
Amita Gupta
NWCS 319 and ACTG 5175 study team
Johns Hopkins University · USJohns Hopkins Medicine · USCancer Research And Biostatistics · US

Funding

AIDS Clinical Trials Group NetworkU01AI068636 · NIAID · SOCIAL AND SCIENTIFIC SYSTEMS, INC. · PI KURITZKES, DANIEL R. · 2006 to 2010
$147.1M
Virology, Immunology, and Microbiology CoreP30AI050410 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI DAVID M. MARGOLIS · 2001 to 2026
$76.9M
Statistical and Data Management Center for the AIDS Clinical Trials GroupU01AI068634 · NIAID · HARVARD SCHOOL OF PUBLIC HEALTH · PI HUGHES, MICHAEL DAVID · 2006 to 2010
$71.9M
Project 4: Intracellular mechanism of virus persistence in astrocytes/macrophagesP01MH070306 · NIMH · JOHNS HOPKINS UNIVERSITY · PI CLEMENTS, JANICE E · 2004 to 2015
$16.0M
The Progression of Hepatitis C Among IDUs with HIVR01DA016078 · NIDA · JOHNS HOPKINS UNIVERSITY · PI BALAGOPAL, ASHWIN, THOMAS, DAVID L · 2002 to 2016
$10.9M
Impact of Malnutrition on HIV Treatment Failure in Resource-Limited SettingsR01AI080417 · NIAID · JOHNS HOPKINS UNIVERSITY · PI GUPTA, AMITA · 2009 to 2012
$2.3M
HIV, Kupffer Cells, and HCV-related Liver FibrosisK08AI081544 · NIAID · JOHNS HOPKINS UNIVERSITY · PI BALAGOPAL, ASHWIN · 2009 to 2013
$644k
NIAID NIH HHS K08 AI081544NIAID NIH HHS P30 AI050410NIAID NIH HHS R01 AI080417NIAID NIH HHS U01 AI068634NIAID NIH HHS U01 AI068636NIDA NIH HHS R01 DA016078NIMH NIH HHS P01 MH070306
6 · The paper itself

Abstract

objectiveMicrobial translocation (MT) is thought to be a major contributor to the pathogenesis of HIV-related immune activation, and circulating lipopolysaccharide (LPS) from gram-negative bacteria is the principle measurement of this process. However, related research has been impeded by inconsistent LPS test results.

methodsSpecimens were obtained from HIV-infected adults enrolled in the PEARLS study (ACTG A5175) and HIV-HCV co-infected participants enrolled in a study of liver disease staging using MRI elastography. Pig-tailed macaque specimens were obtained from SIV-infected and -uninfected animals. Samples were tested for LPS using the LAL assay with diazo-coupling modifications to improve sensitive detection.

resultsWhen exogenous LPS was added to macaque plasma, >25% inhibition of LPS detection was found in 10/10 (100%) samples at 20% plasma concentration compared to control; in contrast 5/10 (50%) samples at 2% plasma concentration (p = 0.07) and 0/10 (0%) at 0.1% plasma concentration (p = 0.004) showed >25% inhibition of LPS detection. Similarly, when LPS was added to human serum, >25% inhibition of LPS detection was found in 5/12 (42%) of samples at 2% serum concentration compared to control, while 0/12 (0%) of samples in 0.1% serum showed >25% inhibition of LPS detection (p = 0.07). Likewise, LPS detection in human sera without exogenous LPS was improved by dilution: LPS was detected in 2/12 (17%) human samples in 2% serum, ranging from 3,436-4,736 pg/mL, compared to 9/12 (75%) samples in 0.1% serum, ranging from 123 pg/mL -60,131 pg/mL (p = 0.016). In a separate validation cohort of HIV-HCV co-infected participants sampled at two different times on the same day, LPS measured in 0.2% plasma and with diazo-coupling was closely correlated between the first and second samples (R = 0.66, p<0.05).

conclusionsUndiluted serum and plasma mask LPS detection. The extent of MT may be substantially underestimated.

Indexed as

Bacterial TranslocationGram-Negative BacteriaAdultAnimalsFemaleGram-Negative Bacterial InfectionsHIV InfectionsHumansLimulus TestLipopolysaccharidesMacaca nemestrinaMaleSimian Acquired Immunodeficiency SyndromeLipopolysaccharides

Identifiers

PMID22870212
PMCPMC3409852
OpenAlexW1976935171

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.