Evidence map›Paper›PMID 21118554›Full record

ArticleRespiratory research2010

Variability in the precursor proteins of collagen I and III in different stages of COPD.

Terttu Harju, Vuokko L Kinnula, Paavo Pääkkö, Kaisa Salmenkivi, Juha Risteli, Riitta Kaarteenaho

Open access · goldAbstract read
In one paragraph

Article in Respiratory research, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
1.4field-weighted citation impact, top 16% 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

21 citing papers in PubMed, 42 citations in OpenAlex.

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  12. Extracellular matrix in lung development, homeostasis and disease.Matrix biology : journal of the International Society for Matrix Biology · 2018
    Review
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  17. Observational
  18. Review
  19. 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

6 authors at 3 institutions in 1 country.

Terttu HarjuInstitute of Clinical Medicine, Department of Internal Medicine, Respiratory Unit, Centre of Excellence in Research, P, O, Box 5000, 90014 University of Oulu, Oulu, Finland. terttu.harju@oulu.fi
Vuokko L Kinnula
Paavo Pääkkö
Kaisa Salmenkivi
Juha Risteli
Riitta Kaarteenaho
Oulu University Hospital · FIUniversity of Helsinki · FIUniversity of Oulu · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLevels of precursor proteins of collagen I and III are increased in fibrotic pulmonary diseases. This study determined whether the expression of precursors of type I and III collagen proteins would be increased in small and large airways of COPD patients in various stages of the disease reflecting fibrogenesis.

methodsThe levels of precursor proteins of collagen I and III were studied by immunohistochemistry and quantified by image analysis in lung tissue of 16 non-smokers, 20 smokers with normal lung function, 20 smokers with stage I-II COPD and 8 ex-smokers with stage IV COPD.

resultsIn large airways, the subepithelial layer which was positive for precursor proteins of collagen I and III was thicker in smokers and in stage I-II COPD compared to non-smokers. Large airways in stage IV COPD showed reduced expression of precursor protein of collagen I whereas precursor of collagen III was increased. The amount of precursor protein of collagen III was increased in small airways of smokers and stage I-II COPD but reduced in stage IV COPD.

conclusionsPrecursor proteins of collagen I and III revealed different expression profiles in large and small airways in various stages of COPD. Smoking enhanced expression of both precursors in large airways with a positive correlation with pack-years.

Indexed as

AgedCollagen Type ICollagen Type IIIDisease ProgressionFemaleHumansLungMaleMiddle AgedPulmonary Disease, Chronic ObstructiveSensitivity and SpecificitySmokingTissue DistributionCollagen Type ICollagen Type III

Identifiers

PMID21118554
PMCPMC3002373
OpenAlexW2163303184

What OpenQuestion holds

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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.