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[In vivo effects of anti-cam antibody on OA sensitized rats]
Abstract:
To determine the role of cell adhesion molecules, we evaluated the in vivo effects of anti-intercellular adhesion molecule-1 (ICAM-1) monoclonal antibody (1A29) and anti-leukocyte function associated molecule-1 (LFA-1) monoclonal antibody (WT-1) on ovalbumin (OA) sensitized rats. Both sneezing discharges and nasal rubbing movements after nasal OA challenge were significantly inhibited by these monoclonal antibody administrations (control vs treated group; 20.5 +/- 5.0 vs 7.0 +/- 2.9 times/minutes, p < 0.01 and and 56.8 +/- 7.1 vs 26.9 +/- 2.9 times/15 minutes, p < 0.01, for sneezing and rubbing, respectively). The number of eosinophils in nasal mucosa 24 hours after the challenge was also inhibited by the treatment (control vs treatment group; 108.8 +/- 27.3 vs 13.8 +/- 6.9 p < 0.01). These results suggest some pathophysiological roles of ICAM-1 and LFA-1 in nasal allergy.
Insights
Monoclonal antibodies targeting intercellular adhesion molecule-1 (ICAM-1) and leukocyte function-associated molecule-1 (LFA-1) significantly reduced allergic nasal symptoms in rats. This suggests ICAM-1 and LFA-1 play key roles in the development of nasal allergies.
Area of Science:
- Immunology
- Allergy Research
- Molecular Biology
Context:
- Nasal allergies involve complex immune responses.
- Cell adhesion molecules like ICAM-1 and LFA-1 are implicated in inflammatory processes.
- Understanding their role is crucial for developing targeted therapies.
Purpose:
- To investigate the in vivo efficacy of anti-ICAM-1 and anti-LFA-1 monoclonal antibodies in a rat model of allergic rhinitis.
- To elucidate the specific contributions of ICAM-1 and LFA-1 to the pathophysiology of nasal allergy.
Summary:
- Ovalbumin-sensitized rats were treated with anti-ICAM-1 (1A29) and anti-LFA-1 (WT-1) monoclonal antibodies.
- Both antibodies significantly reduced sneezing and nasal rubbing following an ovalbumin challenge.
- Treatment also markedly decreased eosinophil counts in the nasal mucosa 24 hours post-challenge.
Impact:
- These findings highlight the significant pathophysiological roles of ICAM-1 and LFA-1 in nasal allergy.
- The study provides evidence for the therapeutic potential of targeting these molecules in allergic rhinitis.
- This research contributes to the understanding of immune cell trafficking in allergic inflammation.