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Targeting CD226/DNAX accessory molecule-1 (DNAM-1) in collagen-induced arthritis mouse models.

Abstract：

BACKGROUND:Genetic studies have pointed out that CD226 variants, encoding DNAM-1, could be associated with susceptibility to rheumatoid arthritis. Therefore, we aimed to determine the influence of DNAM-1 on the development of arthritis using the collagen-induced arthritis (CIA) mouse model. METHODS:CIA was induced in mice on a DBA/1 background, treated in parallel with a DNAM-1 neutralizing monoclonal antibody, a control IgG and PBS, respectively. CIA was also induced in mice deficient for DNAM-1(dnam1-/-) and control dnam-1+/+ mice on a C57/BL6 background. Mice were monitored for clinical and ultrasound signs of arthritis. Histological analysis was performed to search for inflammatory infiltrates and erosions. The Mann-Whitney U test for non-related samples was used for statistical analysis. RESULTS:There was a non-significant trend for a less arthritic phenotype in mice receiving anti-DNAM-1 mAb at both clinical, ultrasound and histological assessments. But, we did not observe any difference between dnam1+/+ and dnam1-/- mice for incidence nor severity of clinical arthritis. Histological analysis revealed inflammatory scores similar in both groups, without evidence of erosion. Collagen antibodies levels were similar in all mice, confirming immunization with collagen. CONCLUSION:Despite some clues suggesting a role of DNAM-1 in arthritis, these complementary approaches demonstrate no contribution of CD226/DNAM-1 in the arthritic phenotype. These results contrast with previous studies showing a role in vivo of DNAM-1 in some autoimmune disorders.

journal_name

J Inflamm (Lond)

journal_title

Journal of inflammation (London, England)

authors

Elhai M,Chiocchia G,Marchiol C,Lager F,Renault G,Colonna M,Bernhardt G,Allanore Y,Avouac J

doi

10.1186/s12950-015-0056-5

subject

Has Abstract

pub_date

2015-02-08 00:00:00

pages

9

issn

1476-9255

pii

56

journal_volume

12

pub_type

杂志文章

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