Evidence map›Paper›PMID 24755410›Full record

Trial reportBlood2014

Platelet-TLR7 mediates host survival and platelet count during viral infection in the absence of platelet-dependent thrombosis.

Milka Koupenova, Olga Vitseva, Christopher R MacKay, Lea M Beaulieu, Emelia J Benjamin, Eric Mick, Evelyn A Kurt-Jones, Katya Ravid, Jane E Freedman

Open access · bronzeAbstract readClinical Trial
In one paragraph

Trial report in Blood, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 163 papers.

0numbers the graph read from it
0cells of the map it votes in
163citing papers in PubMed
9.0field-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

163 citing papers in PubMed, 258 citations in OpenAlex.

  1. Review
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  3. Beyond Hemostasis: Platelet Biomarkers and Vascular-Immune Crosstalk in Dengue.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026
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103 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 1 country.

Milka KoupenovaDivision of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA; Department of Medicine, and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA;
Olga VitsevaDivision of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
Christopher R MacKayDivision of Infectious Disease and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
Lea M BeaulieuDivision of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
Emelia J BenjaminDepartment of Medicine, and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA; National Heart, Lung, and Blood Institute and Boston University's Framingham Heart Institute, Framingham, MA;
Eric MickDivision of Quantitative Health Sciences, Department of Medicine, University of Massachusetts Medical School, Worcester, MA; and.
Evelyn A Kurt-JonesDivision of Infectious Disease and Immunology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
Katya RavidDepartment of Medicine, and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA; Evans Center for Interdisciplinary Biomedical Research, Boston University School of Medicine, Boston, MA.
Jane E FreedmanDivision of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;
University of Massachusetts Chan Medical School · USBoston University · USFramingham Heart Study · US

Funding

Translational Research Skills Development CoreU54HL112311 · NHLBI · UNIVERSITY OF UTAH · PI WEYRICH, ANDREW S, ZIMMERMAN, GUY A. · 2012 to 2016
$12.9M
Multidisciplinary Training in Cardiovascular ResearchT32HL007224 · NHLBI · BOSTON UNIVERSITY MEDICAL CAMPUS · PI HAMBURG, NAOMI MIRIAM, WAINFORD, RICHARD DAVID · 1985 to 2020
$12.3M
Role of Innate Immune System in Pathogen Induced Chronic InflammationP01AI078894 · NIAID · BOSTON UNIVERSITY MEDICAL CAMPUS · PI MADICO, GUILLERMO · 2010 to 2014
$7.4M
Innate Immunity and Herpes Simplex InfectionP01AI083215 · NIAID · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI FINBERG, ROBERT WILLIAM · 2009 to 2010
$3.7M
Mechanisms Regulating Megakaryocyte EndomitosisR01HL080442 · NHLBI · BOSTON UNIVERSITY MEDICAL CAMPUS · PI RAVID, KATYA · 2006 to 2015
$3.6M
Gene Expression and Thrombosis in a Community Based Cohort StudyR01HL087201 · NHLBI · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI FREEDMAN, JANE E · 2007 to 2010
$2.9M
Innate Immunity Training ProgramT32AI095213 · NIAID · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI SILVERMAN, NEAL · 2011 to 2025
$2.5M
Aging and Inflammation: Longitudinal Markers and Genetics in the Framingham StudyR01AG028321 · NIA · BOSTON UNIVERSITY MEDICAL CAMPUS · PI BENJAMIN, EMELIA J. · 2006 to 2010
$1.8M
THE FRAMINGHAM HEART STUDY-N01HC25195-268025195-268025195N01HC025195 · HC · TRUSTEES OF BOSTON UNIVERSITY · PI WOLF, PHILIP A · 2002 to 2006
–
NHLBI NIH HHS HL087201NHLBI NIH HHS HL-112311-02NHLBI NIH HHS HL-12008NHLBI NIH HHS HL80442NHLBI NIH HHS N01 HC025195NHLBI NIH HHS N01-HC 25195NHLBI NIH HHS R01 HL080442NHLBI NIH HHS R01 HL087201NHLBI NIH HHS T32 HL007224NHLBI NIH HHS U54 HL112311NIAID NIH HHS P01 AI078894NIAID NIH HHS P01 AI083215NIAID NIH HHS T32 AI095213NIA NIH HHS 1R01AG028321NIA NIH HHS R01 AG028321
6 · The paper itself

Abstract

Viral infections have been associated with reduced platelet counts, the biological significance of which has remained elusive. Here, we show that infection with encephalomyocarditis virus (EMCV) rapidly reduces platelet count, and this response is attributed to platelet Toll-like receptor 7 (TLR7). Platelet-TLR7 stimulation mediates formation of large platelet-neutrophil aggregates, both in mouse and human blood. Intriguingly, this process results in internalization of platelet CD41-fragments by neutrophils, as assessed biochemically and visualized by microscopy, with no influence on platelet prothrombotic properties. The mechanism includes TLR7-mediated platelet granule release, translocation of P-selectin to the cell surface, and a consequent increase in platelet-neutrophil adhesion. Viral infection of platelet-depleted mice also led to increased mortality. Transfusion of wild-type, TLR7-expressing platelets into TLR7-deficient mice caused a drop in platelet count and increased survival post EMCV infection. Thus, this study identifies a new link between platelets and their response to single-stranded RNA viruses that involves activation of TLR7. Finally, platelet-TLR7 stimulation is independent of thrombosis and has implications to the host immune response and survival.

Indexed as

ThrombosisAnimalsBlood PlateletsCardiovirus InfectionsCell DegranulationEncephalomyocarditis virusFemaleHumansLipopolysaccharide ReceptorsMaleMembrane GlycoproteinsMiceMice, KnockoutNeutrophilsPlatelet CountSecretory VesiclesLipopolysaccharide ReceptorsMembrane GlycoproteinsTLR7 protein, humanTlr7 protein, mouseToll-Like Receptor 7

Identifiers

PMID24755410
PMCPMC4118487
OpenAlexW1983927535

What OpenQuestion holds

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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.