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Pregnancy amelioration of arthritis in SKG mice corresponds with alterations in serum amyloid A3 levels.
MedLine Citation:
PMID:  23097751     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: Pregnancy leads to rheumatoid arthritis remission in humans. The objective of this study was to determine if the SKG mouse could serve as a model for pregnancy-associated inflammatory arthritis amelioration. In addition, the maternal peripheral blood mononuclear cell (PBMC) transcriptome was assessed to define a biomarker associated with remission. METHODS: Cohorts of zymosan-treated pregnant SKG mice and controls were monitored for arthritis progression. Microarray analysis evaluated alterations in gene expression in maternal PBMCs at embryonic day 14.5 (E14.5) between arthritic and pregnancy-remitted mice. A selected target, serum amyloid A3 (SAA3), was further investigated using quantitative reverse transcriptase PCR (qRT-PCR) and an enzyme-linked immunosorbent assay (ELISA). RESULTS: Pregnancy resulted in complete or partial remission in the majority of the zymosan-treated SKG mice. Twenty-seven transcripts were differentially expressed in the PBMCs between arthritic and pregnancy-remitted mice. Expression and plasma SAA3 levels decreased with pregnancy-induced arthritis amelioration and plasma SAA3 levels correlated with arthritis severity. CONCLUSIONS: These results establish the SKG mouse as a model system to study pregnancy-induced amelioration of arthritis. These studies also establish SAA3 as a biomarker of arthritis amelioration in SKG mice. This model can be used to elucidate the molecular and cellular mechanisms underlying the impact of pregnancy on the maternal immune system that results in arthritis amelioration.
Authors:
Laura A Shaw; Adrianne L Stefanski; Lisa K Peterson; Kristen K Rumer; Andrea Vondracek; Tzu L Phang; Shimon Sakaguchi; Virginia D Winn; Leonard L Dragone
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-20
Journal Detail:
Title:  American journal of clinical and experimental immunology     Volume:  1     ISSN:  2164-7712     ISO Abbreviation:  Am J Clin Exp Immunol     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-10-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101587157     Medline TA:  Am J Clin Exp Immunol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  12-19     Citation Subset:  -    
Affiliation:
Department of Pediatrics, National Jewish Health, Denver, Colorado 80206.
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