RGD Reference Report - Up-regulation of endothelin receptor function and mRNA expression in airway smooth muscle cells following Sephadex-induced airway inflammation. - Rat Genome Database

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Up-regulation of endothelin receptor function and mRNA expression in airway smooth muscle cells following Sephadex-induced airway inflammation.

Authors: Granstrom, BW  Xu, CB  Nilsson, E  Bengtsson, UH  Edvinsson, L 
Citation: Granstrom BW, etal., Basic Clin Pharmacol Toxicol. 2004 Jul;95(1):43-8.
RGD ID: 4892324
Pubmed: PMID:15245576   (View Abstract at PubMed)
DOI: DOI:10.1111/j.1742-7843.2004.pto950109.x   (Journal Full-text)

The hypothesis that up-regulation of bronchial constrictor endothelin receptors in airway smooth muscle cells may contribute to hyperreactivity during airway inflammation was tested in the present study by quantitative endothelin receptor mRNA analysis and functional responses in ring segments of rat trachea and bronchi. Real time reverse transcription polymerase chain reaction was used to quantify endothelin receptor expression in rat airway smooth muscle cells following Sephadex-induced inflammation. Compared with controls, Sephadex-induced airway inflammation caused a significant increase (3.9 times P<0.05) of endothelin receptor type B mRNA expression in bronchial smooth muscle cells, but not in tracheal smooth muscle cells. Functional myograph studies of bronchial and tracheal ring segments without epithelium (mechanically denuded) revealed an increase of the maximum contractile effects of endothelin-1 (a dual agonist for both endothelin type A and B receptors) and sarafotoxin 6c (a selective agonist for endothelin B receptors) in bronchial smooth muscle cells in Sephadex-induced inflammation, but not in tracheal smooth muscle cells. The enhanced maximal responses of bronchial smooth muscle cells to endothelin-1 and sarafotoxin 6c in Sephadex-induced inflammation support our molecular findings and hence imply a role for endothelin B receptors in airway hyperreactivity during airway inflammation.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
asthma  ISOEdnrb (Rattus norvegicus)4892324; 4892324mRNA:increased expression:bronchus and smooth muscle cellRGD 
asthma  IEP 4892324mRNA:increased expression:bronchus and smooth muscle cellRGD 

Objects Annotated

Genes (Rattus norvegicus)
Ednrb  (endothelin receptor type B)

Genes (Mus musculus)
Ednrb  (endothelin receptor type B)

Genes (Homo sapiens)
EDNRB  (endothelin receptor type B)


Additional Information