Evidence map›Paper›PMID 23667439›Full record

ArticlePloS one2013

Intratracheal IL-6 protects against lung inflammation in direct, but not indirect, causes of acute lung injury in mice.

Rhea Bhargava, William Janssen, Christopher Altmann, Ana Andrés-Hernando, Kayo Okamura, R William Vandivier, Nilesh Ahuja, Sarah Faubel

Open access · goldAbstract readComparative Study
In one paragraph

Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
4.3field-weighted citation impact, top 6% 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

39 citing papers in PubMed, 77 citations in OpenAlex.

  1. Trial
  2. Article
  3. The inhibitory effects ofFood science and biotechnology · 2026
    Article
  4. Acute lung injury: pathogenesis and treatment.Journal of translational medicine · 2025
    Review
  5. Article
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  7. Article
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  18. KScientific reports · 2020
    Article
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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

8 authors at 3 institutions in 1 country.

Rhea BhargavaDepartment of Medicine, Division of Renal Diseases and Hypertension, University of Colorado Denver, Aurora, Colorado, United States of America.
William Janssen
Christopher Altmann
Ana Andrés-Hernando
Kayo Okamura
R William Vandivier
Nilesh Ahuja
Sarah Faubel
University of Colorado Denver · USDenver VA Medical Center · USNational Jewish Health · US

Funding

Macrophage Apoptosis in Resolution of Acute Lung InjuryR01HL109517 · NHLBI · NATIONAL JEWISH HEALTH · PI JANSSEN, WILLIAM · 2012 to 2017
$3.1M
Acute Renal Failure Mediated Lung InjuryR01HL095363 · NHLBI · UNIVERSITY OF COLORADO DENVER · PI FAUBEL, SARAH G · 2009 to 2013
$1.8M
NHLBI NIH HHS HL109517NHLBI NIH HHS R01 HL095363NHLBI NIH HHS R01 HL109517
6 · The paper itself

Abstract

introductionSerum and bronchoalveolar fluid IL-6 are increased in patients with acute respiratory distress syndrome (ARDS) and predict prolonged mechanical ventilation and poor outcomes, although the role of intra-alveolar IL-6 in indirect lung injury is unknown. We investigated the role of endogenous and exogenous intra-alveolar IL-6 in AKI-mediated lung injury (indirect lung injury), intraperitoneal (IP) endotoxin administration (indirect lung injury) and, for comparison, intratracheal (IT) endotoxin administration (direct lung injury) with the hypothesis that IL-6 would exert a pro-inflammatory effect in these causes of acute lung inflammation.

methodsBronchoalveolar cytokines (IL-6, CXCL1, TNF-α, IL-1β, and IL-10), BAL fluid neutrophils, lung inflammation (lung cytokines, MPO activity [a biochemical marker of neutrophil infiltration]), and serum cytokines were determined in adult male C57Bl/6 mice with no intervention or 4 hours after ischemic AKI (22 minutes of renal pedicle clamping), IP endotoxin (10 µg), or IT endotoxin (80 µg) with and without intratracheal (IT) IL-6 (25 ng or 200 ng) treatment.

resultsLung inflammation was similar after AKI, IP endotoxin, and IT endotoxin. BAL fluid IL-6 was markedly increased after IT endotoxin, and not increased after AKI or IP endotoxin. Unexpectedly, IT IL-6 exerted an anti-inflammatory effect in healthy mice characterized by reduced BAL fluid cytokines. IT IL-6 also exerted an anti-inflammatory effect in IT endotoxin characterized by reduced BAL fluid cytokines and lung inflammation; IT IL-6 had no effect on lung inflammation in AKI or IP endotoxin.

conclusionIL-6 exerts an anti-inflammatory effect in direct lung injury from IT endotoxin, yet has no role in the pathogenesis or treatment of indirect lung injury from AKI or IP endotoxin. Since intra-alveolar inflammation is important in the pathogenesis of direct, but not indirect, causes of lung inflammation, IT anti-inflammatory treatments may have a role in direct, but not indirect, causes of ARDS.

Indexed as

Acute Kidney InjuryAcute Lung InjuryAnalysis of VarianceAnimalsBlood Urea NitrogenBronchoalveolar Lavage FluidCreatinineCytokinesEndotoxinsInterleukin-6MaleMiceMice, Inbred C57BLPneumoniaTracheaCreatinineCytokinesendotoxin, Escherichia coliEndotoxinsInterleukin-6

Identifiers

PMID23667439
PMCPMC3648558
OpenAlexW2030177843

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.