Veterinary Research Communications

, Volume 31, Issue 5, pp 611–619

Reactivity of Equine Airways—A Study on Precision-cut Lung Slices

  • J. Vietmeier
  • F. Niedorf
  • W. Bäumer
  • C. Martin
  • E. Deegen
  • B. Ohnesorge
  • M. Kietzmann
Article

DOI: 10.1007/s11259-007-3501-y

Cite this article as:
Vietmeier, J., Niedorf, F., Bäumer, W. et al. Vet Res Commun (2007) 31: 611. doi:10.1007/s11259-007-3501-y

Abstract

A study was performed to evaluate the use of precision-cut lung slices (PCLS) for studies on the contraction of equine airways. Lungs of 10 horses were taken to prepare PCLS of ˜250 μm from equine lung tissue using a special microtome. The lung slices were cultured and the enclosed small airways were monitored using a microscope with coupled digital camera, which was used to determine the airway luminal area and diameter from digital images. As indicated by the beating of the ciliated epithelium and reactivity of airways on methacholine challenge, the tissue slices were found to be viable for at least 24 h. The airways were not precontracted, as indicated by a missing dilatory effect of 1 mmol/L clenbuterol. Bronchoconstriction induced by both methacholine and histamine was found to be dose dependent. EC50 values based on luminal area were 1.12 μmol/L · /÷ 3.82 for methacholine and 0.68 μmol/L · /÷ 6.99 for histamine. In conclusion, the PCLS technique is promising for studies on small airways in the equine lung. In the present study the basic principles of in vitro (ex vivo) examinations with equine PCLS on airway reactivity were developed.

Keywords

histaminehorselungmethacholinePCLS

Abbreviations

COPD

chronic obstructive pulmonary disease

EC

effective concentration

MTT

dimethylthiazolyldiphenyltetrazolium bromide

PCLS

precision-cut lung slices

Copyright information

© Springer Science + Business Media, Inc. 2007

Authors and Affiliations

  • J. Vietmeier
    • 1
    • 2
  • F. Niedorf
    • 1
  • W. Bäumer
    • 1
  • C. Martin
    • 3
  • E. Deegen
    • 2
  • B. Ohnesorge
    • 2
  • M. Kietzmann
    • 1
  1. 1.Institute of Pharmacology, Toxicology and PharmacyUniversity of Veterinary Medicine HannoverHannover
  2. 2.Clinic for HorsesUniversity of Veterinary Medicine HannoverHannover
  3. 3.Research Center BorstelGermany