Format

Send to

Choose Destination
J Trace Elem Med Biol. 2015 Jan;29:347-53. doi: 10.1016/j.jtemb.2014.06.007. Epub 2014 Jun 24.

Aberrant expression of copper associated genes after copper accumulation in COMMD1-deficient dogs.

Author information

1
Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands. Electronic address: r.p.favier@uu.nl.
2
Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, P.O. Box 80154, 3508 TD, Utrecht, The Netherlands.
3
TCCI Consultancy BV, The Netherlands.

Abstract

BACKGROUND:

COMMD1-deficient dogs progressively develop copper-induced chronic hepatitis. Since high copper leads to oxidative damage, we measured copper metabolism and oxidative stress related gene products during development of the disease.

METHODS:

Five COMMD1-deficient dogs were studied from 6 months of age over a period of five years. Every 6 months blood was analysed and liver biopsies were taken for routine histological evaluation (grading of hepatitis), rubeanic acid copper staining and quantitative copper analysis. Expression of genes involved in copper metabolism (COX17, CCS, ATOX1, MT1A, CP, ATP7A, ATP7B, ) and oxidative stress (SOD1, catalase, GPX1 ) was measured by qPCR. Due to a sudden death of two animals, the remaining three dogs were treated with d-penicillamine from 43 months of age till the end of the study. Presented data for time points 48, 54, and 60 months was descriptive only.

RESULTS:

A progressive trend from slight to marked hepatitis was observed at histology, which was clearly preceded by an increase in semi-quantitative copper levels starting at 12 months until 42 months of age. During the progression of hepatitis most gene products measured were transiently increased. Most prominent was the rapid increase in the copper binding gene product MT1A mRNA levels. This was followed by a transient increase in ATP7A and ATP7B mRNA levels.

CONCLUSIONS:

In the sequence of events, copper accumulation induced progressive hepatitis followed by a transient increase in gene products associated with intracellular copper trafficking and temporal activation of anti-oxidative stress mechanisms.

KEYWORDS:

COMMD1-deficient dogs; Copper accumulation; Translational research

PMID:
25053573
DOI:
10.1016/j.jtemb.2014.06.007
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center