CovidV2, Main, Exploration, bibRecord, 001588

Positional cloning of the Igl genes controlling rheumatoid factor production and allergic bronchitis in rats

Identifieur interne : 001588 ( Main/Exploration ); précédent : 001587; suivant : 001589

Positional cloning of the Igl genes controlling rheumatoid factor production and allergic bronchitis in rats

Auteurs : Carola Rintisch [Suède] ; Jacqueline Ameri [Suède] ; Peter Olofsson [Suède] ; Holger Luthman [Suède] ; Rikard Holmdahl [Suède]

Source :

Proceedings of the National Academy of Sciences of the United States of America [ 0027-8424 ] ; 2008.

RBID : PMC:2544569

Abstract

Rheumatoid factors (RF), autoantibodies that bind the Fc region of IgG, are one of the major diagnostic marker in rheumatoid arthritis (RA) but occur with lower frequency also in other infectious and inflammatory conditions. Through positional cloning of the previously described quantitative trait locus (QTL) Rf1 in congenic and advanced intercrossed rats, we identified the Ig lambda light chain locus as a locus that regulates the production of RF in rats. The congenic rats produce RF-Igλ and have significant higher levels of RF-IgG and RF-IgM in serum, while the DA rat has an impaired RF production and does not produces RF-Igλ. Thus, we could investigate the role of RF in pristane-induced arthritis (PIA) as well as ovalbumin-induced airway inflammation. We show that there was no difference in the development and severity of PIA between congenic and parental DA rats, suggesting that RF using lambda light chains have no impact on PIA. However, the RF producing congenic rats developed a more severe airway inflammation as indicated in the significantly increased number of eosinophils in bronchoalveolar lavage fluid as well as total IgE in serum. In addition, RF congenic rats had a significantly enhanced immune response toward OVA due to increased OVA-Igk but not OVA-Igl antibodies, suggesting a possible involvement of RF in the regulation of the humoral immune response.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2544569

DOI: 10.1073/pnas.0803956105
PubMed: 18779593
PubMed Central: 2544569

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en"><p>Rheumatoid factors (RF), autoantibodies that bind the Fc region of IgG, are one of the major diagnostic marker in rheumatoid arthritis (RA) but occur with lower frequency also in other infectious and inflammatory conditions. Through positional cloning of the previously described quantitative trait locus (QTL) <italic>Rf1</italic>
 in congenic and advanced intercrossed rats, we identified the Ig lambda light chain locus as a locus that regulates the production of RF in rats. The congenic rats produce RF-Igλ and have significant higher levels of RF-IgG and RF-IgM in serum, while the DA rat has an impaired RF production and does not produces RF-Igλ. Thus, we could investigate the role of RF in pristane-induced arthritis (PIA) as well as ovalbumin-induced airway inflammation. We show that there was no difference in the development and severity of PIA between congenic and parental DA rats, suggesting that RF using lambda light chains have no impact on PIA. However, the RF producing congenic rats developed a more severe airway inflammation as indicated in the significantly increased number of eosinophils in bronchoalveolar lavage fluid as well as total IgE in serum. In addition, RF congenic rats had a significantly enhanced immune response toward OVA due to increased OVA-Igk but not OVA-Igl antibodies, suggesting a possible involvement of RF in the regulation of the humoral immune response.</p>
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Positional cloning of the Igl genes controlling rheumatoid factor production and allergic bronchitis in rats

Positional cloning of the Igl genes controlling rheumatoid factor production and allergic bronchitis in rats

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Abstract

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