R van den Hoven, J C Duvigneau, R T Hartl, M Gemeiner
Department of Companion Animals and Horses, Clinic for Internal Medicine and Infectious Diseases, Institute of Medical Chemistry, Veterinary University of Vienna, Veterinärplatz 1, A-1210 Vienna, Austria. Rene.vandenHoven@vu-wien.ac.at.
Veterinary research communications 2006 NovOn four occasions, four horses with heaves and four horses with small airway inflammatory diseases inhaled 0.9% saline based aerosol mixtures with or without lipopolysaccharides (LPS). Prior to the first saline and LPS inhalation, horses were untreated, while three and a half days prior to the third and forth inhalation horses had received 0.8 microg/kg clenbuterol intravenously twice daily. The messenger RNA (mRNA) expression of tumour necrosis factor-alpha (TNF-alpha), interleukin (IL)-1beta, IL-4, IL-6, IL-8, IL-10 and interferon- gamma (IFN- gamma) was investigated by RT-PCR, all of which were expressed in the white blood cells of samples collected. Inhalation of LPS only changed the cytokine expression profile of IL-10, IL-4 and TNF-alpha mRNA which were higher after challenge with LPS. However in those horses that were treated with clenbuterol the LPS-induced IL-10 mRNA expression was shown to be suppressed. Further changes in IL-4 and TNF-alpha were not significant. Thus the results of this study indicated that clenbuterol can modulate the expression of IL-10 mRNA in peripheral white blood cells in those horses with small airway diseases that have been exposed to LPS.
R van den Hoven, J C Duvigneau, R T Hartl, M Gemeiner. Clenbuterol affects the expression of messenger RNA for interleukin 10 in peripheral leukocytes from horses challenged intrabronchially with lipopolysaccharides. Veterinary research communications. 2006 Nov;30(8):921-8
PMID: 17139543
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