Chronicity of pristane-induced arthritis in rats is controlled by genes on chromosome 14

Research output: Contribution to journalArticle


To, address; he possibility, that genes specifically control the chronic phase of arthritis we have isolated a congenic fragment from the resistant E3; rat cm the, susceptible DA rat background. The isolated fragment covers the Pia6 quantitative trait locus on chromosome 14, which previously has been identified to be linked to chronic pristane induced arthritis (PIA) in gene segregation experiments; of an (E3 x DA) F-2-cross. Heterozygous. Pia6 congenic rats (DA.Pia6) were protected from chronic active arthritis specifically, as determined by macroscopic scoring, histopathology and release of cartilage oligomeric matrix protein (-reflecting ongoing cartilage destruction). The difference was seen only during the chronic active phase of arthritis starting approximately 5 weeks after onset of arthritis. Interestingly, the plasma concentration of the lipocalins alpha(1)-acid glycoprotein and alpha(1)-microglobulin was found significantly altered in naive congenic rats compared to the DA rat. The concentration of alpha(1)-microglobulin was found to be significantly higher throughout the disease course, while alpha(1)-acid glycoprotein had a lower concentration in naive rats, which was highly significant in the chronic phase. The altered concentrations of these proteins already before development of chronic arthritis may provide a clue to the pathogenic process controlled by the Pia6 genes. We conclude that the active relapsing chronic arthritis is under a unique genetic control that is different from the control of acute arthritis and postulate that the liver plays an important role in this relagation. (C) 2003 Elsevier Ltd. All rights reserved..


  • Lena Wester Rosenlöf
  • Peter Olofsson
  • SM Ibrahim
  • Rikard Holmdahl
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Rheumatology and Autoimmunity


  • liver, congenic animal, cartilage oligomeric matrix protein, alpha(1)-microglobulin, alpha(1)-acid glycoprotein
Original languageEnglish
Pages (from-to)305-313
JournalJournal of Autoimmunity
Issue number4
Publication statusPublished - 2003
Publication categoryResearch

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Medical Inflammation Research (013212019)