Related Experiment Videos
Possible participation of macrophage inflammatory protein 2 in neutrophil infiltration in allergic inflammation in
Y Q Xiao1, J I Tanabe, T Edamatsu
1Department of Pathophysiological Biochemistry, Faculty of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan.
Abstract:
Recombinant rat macrophage inflammatory protein 2 (MIP-2) was prepared from E. coli transfected with a glutathione-S-transferase (GST)-MIP-2 fusion protein expression vector. A polyclonal antibody to rat MIP-2 was then obtained from rabbits by immunization with recombinant rat MIP-2. Using the polyclonal antibody which selectively suppressed neutrophil chemotactic activity of MIP-2, the role of MIP-2 in neutrophil infiltration in allergic inflammation in rats was studied. In an air pouch-type allergic inflammation model in rats, neutrophil infiltration into the pouch fluid increased with time after antigen challenge. Neutrophil chemotactic activity in the pouch fluid collected 8 h after antigen challenge was diminished by anti-MIP-2 antibody. In addition, when leukocytes that had infiltrated into the pouch fluid collected 4 h after antigen challenge were incubated, neutrophil chemotactic activity in the conditioned medium increased time-dependently, and the activity was neutralized by anti-MIP-2 antibody. Furthermore, when anti-MIP-2 antibody was injected into the pouch 6 h after antigen challenge, neutrophil infiltration into the pouch fluid during the next 2 h was suppressed. These findings indicate that MIP-2 plays an important role in neutrophil infiltration in rat allergic inflammation.
Insights
Macrophage inflammatory protein 2 (MIP-2) drives neutrophil infiltration during rat allergic inflammation. Neutralizing antibodies against MIP-2 effectively suppressed this inflammatory response, highlighting MIP-2's crucial role.
Area of Science:
- Immunology
- Inflammation Research
- Chemoattractant Cytokines
Background:
- Neutrophil infiltration is a hallmark of allergic inflammation.
- The specific role of macrophage inflammatory protein 2 (MIP-2) in this process requires further elucidation.
Purpose of the Study:
- To investigate the role of rat macrophage inflammatory protein 2 (MIP-2) in neutrophil infiltration during allergic inflammation.
- To assess the efficacy of anti-MIP-2 antibodies in modulating this inflammatory response.
Main Methods:
- Recombinant rat MIP-2 was produced using a glutathione-S-transferase (GST) fusion protein expression vector in E. coli.
- A polyclonal antibody against rat MIP-2 was generated in rabbits.
- An air pouch-type allergic inflammation model in rats was utilized.
- Neutrophil infiltration and chemotactic activity were measured in pouch fluid and conditioned media.
Main Results:
- Neutrophil infiltration into the air pouch increased over time following antigen challenge.
- Neutrophil chemotactic activity in pouch fluid was significantly reduced by anti-MIP-2 antibody.
- Leukocyte-conditioned media exhibited time-dependent neutrophil chemotactic activity, which was neutralized by anti-MIP-2 antibody.
- Administration of anti-MIP-2 antibody into the air pouch suppressed neutrophil infiltration.
Conclusions:
- Macrophage inflammatory protein 2 (MIP-2) is a key mediator of neutrophil infiltration in rat allergic inflammation.
- Targeting MIP-2 with specific antibodies represents a potential therapeutic strategy for allergic inflammatory conditions.