Evidence map›Paper›PMID 21317312›Full record

ArticleAmerican journal of respiratory and critical care medicine2011

Cigarette smoke suppresses Bik to cause epithelial cell hyperplasia and mucous cell metaplasia.

Yohannes A Mebratu, Kurt Schwalm, Kevin R Smith, Mark Schuyler, Yohannes Tesfaigzi

Abstract read
In one paragraph

Article in American journal of respiratory and critical care medicine, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
2.5field-weighted citation impact, top 11% 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

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

  1. Pooled it
  2. Trial
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    Review
  4. Persistence of emphysema following cessation of cigarette smoke exposure requires a susceptibility factor.American journal of physiology. Lung cellular and molecular physiology · 2024
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  11. Autophagy Induced by BCL2-Related ceRNA Network Participates in the Occurrence of COPD.International journal of chronic obstructive pulmonary disease · 2022
    Article
  12. Review
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  17. Review
  18. Article
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  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Yohannes A MebratuLovelace Respiratory Research Institute, Albuquerque, NM 87108, USA.
Kurt Schwalm
Kevin R Smith
Mark Schuyler
Yohannes Tesfaigzi
Lovelace Respiratory Research Institute · USUniversity of New Mexico · US

Funding

Resolution of Epithelial Cell Hyperplasia in AsthmaR01HL068111 · NHLBI · LOVELACE BIOMEDICAL & ENVIRONMENTAL RESEARCH INSTITUTE · PI TESFAIGZI, YOHANNES · 2003 to 2021
$10.9M
Resolution of Epithelial Cell HyperplasiaR01ES015482 · NIEHS · LOVELACE BIOMEDICAL & ENVIRONMENTAL RESEARCH INSTITUTE · PI TESFAIGZI, YOHANNES · 2009 to 2013
$2.6M
Regulation of Mucous Cell Metaplasia in AsthmaR56HL068111 · NHLBI · LOVELACE BIOMEDICAL & ENVIRONMENTAL RESEARCH INSTITUTE · PI TESFAIGZI, YOHANNES · 2007 to 2007
$500k
NHLBI NIH HHS HL68111NIEHS NIH HHS ES015482
6 · The paper itself

Abstract

rationaleAberrant regulation of airway epithelial cell numbers in airways leads to increased mucous secretions in chronic lung diseases such as chronic bronchitis. Because the Bcl-2 family of proteins is crucial for airway epithelial homeostasis, identifying the players that reduce cigarette smoke (CS)-induced mucous cell metaplasia can help to develop effective therapies.

objectivesTo identify the Bcl-2 family of proteins that play a role in reducing CS-induced mucous cell metaplasia.

methodsWe screened for dysregulated expression of the Bcl-2 family members. MEASUREMENTS AND MAIN

resultsWe identified Bik to be significantly reduced in bronchial brushings of patients with chronic epithelial cell hyperplasia compared with nondiseased control subjects. Reduced Bik but increased MUC5AC mRNA levels were also detected when normal human airway epithelial cells (HAECs) were exposed to CS or when autopsy tissues from former smokers with and without chronic bronchitis were compared. Similarly, exposure of C57Bl/6 mice to CS resulted in increased numbers of epithelial and mucous cells per millimeter of basal lamina, along with reduced Bik but increased Muc5ac expression, and this change was sustained even when mice were allowed to recover in filtered air for 8 weeks. Restoring Bik expression significantly suppressed CS-induced mucous cell metaplasia in differentiated primary HAEC cultures and in airways of mice in vivo. Bik blocked nuclear translocation of phospho-ERK1/2 to induce apoptosis of HAECs. The conserved Leu61 within Bik and ERK1/2 activation were essential to induce cell death in hyperplastic mucous cells.

conclusionsThese studies show that CS suppresses Bik expression to block airway epithelia cell death and thereby increases epithelial cell hyperplasia in chronic bronchitis.

Indexed as

AnimalsBlotting, WesternDisease Models, AnimalElectrophoresis, Polyacrylamide GelEpithelial CellsFemaleGenes, bcl-2HumansHyperplasiaLungMaleMetaplasiaMiceMice, Inbred C57BLMiddle AgedMucous Membrane

Identifiers

PMID21317312
PMCPMC3137142
OpenAlexW2084376751

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.