2
Views
1
CrossRef citations to date
0
Altmetric
Articles

Conjugation of Non-Erythroid Bilirubin in Chronic Experimental Cholestasis in the Dog

, &
Pages 565-569 | Received 06 Feb 1975, Accepted 27 May 1975, Published online: 16 Oct 2020
 

Abstract

Bergan, A., Östrem, T. & Gjelstad, N. Conjugation of non-erythroid bilirubin in chronic experimental cholestasis in the dog. Scand. J. Gastroent. 1975, 10, 565-569.

The dynamics of conjugation of 14C-bilirubin injected intravenously during cholestasis is known from studies in rats and dogs. No studies have been performed concerning the conjugation of non-erythroid bilirubin (NEB), i.e. the 10-20% of bilirubin synthesized from tissue haemes, mainly in the liver. This study reports the results of experiments in four dogs subjected to extra-hepatic cholestasis of 7-14 days’ duration. δ-Aminolevulinic acid-5-Cl4HCl was injected intravenously as a NEB precursor. The appearances of unconjugated and conjugated labelled NEB as well as of the different azopigments were followed in systemic blood, liver vein blood, and thoracic duct lymph. The first NEB to appear was unconjugated; maximal concentration of unconjugated NEB in peripheral and liver vein blood was reached within one hour. The amount of conjugated NEB in both vascular compartments increased for two to three hours, after which time the degree of conjugation stabilized. The degree of conjugation was higher in liver vein than in peripheral blood for the first two hours. The same azopigments of NEB were found as for injected 14C-bilirubin. The α0 azopigment (azobilirubin) was present in higher amounts in peripheral than in liver vein blood, all the other azopigments were present in higher amounts in liver vein blood.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.