EFFECTS OF SYMPATHETIC DENERVATION ON LIVER FIBROBLASTS - PREVENTION BY ADENOSINE

• Type: Article in International Scientific Journal
• Date: 1990

Authors

Albino Teixeira, A (Author) FMUP; matias, a (Author) FMUP; soares-da-silva, p (Author) FMUP; Sarmento A (Author) FMUP; AZEVEDO, I (Author) Other

Journal

Title: Journal of Autonomic Pharmacology

Vol. 10

Pages: 181-189

ISSN: 0144-1795

Publisher: Blackwell

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 15 Citations

Other information

Authenticus ID: P-001-RQX

DOI: 10.1111/j.1474-8673.1990.tb00017.x

Abstract (EN): The effect of chemical denervation with 6-hydroxydopamine (6-OHDA) upon portal tract fibroblasts of dogs and rabbits was studied. Denervation led to a significant increase in the density of portal tract fibroblasts both in the dog and in the rabbit. Mast cells, present in the dog but not in the rabbit liver, were also significantly increased by denervation. Noradrenaline depletion induced by reserpine did not increase the density of fibroblasts in the liver portal spaces of the dog. Mast cell density, however, was actually decreased when compared with control. Continuous i.v. infusions of adenosine (10 ¿g kg-1h-1) to dogs totally prevented the effects of 6-OHDA-induced denervation upon fibroblast and mast cell densities in the portal space connective tissue. It is concluded that the sympathetic nervous system is exerting a repressive effect on liver fibroblasts, as was found to occur in various other mammalian tissues. Mast cells, which are known to be activated in various pathological processes of fibrosis, appear to share with fibroblasts a modulating effect from the sympathetic nervous system. The results strongly support the hypothesis of adenosine being the sympathetic trophic factor involved in the control of fibroblasts in the connective tissue of dog liver. A similar role for adenosine had previously been found in the dog saphenous vein.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9