Related Experiment Videos
[Observation of monoclonal antibody E4B7D5 inhibitory effect on leptospiral adherence using scanning electron
Abstract:
BALB/c mice were immunized intraperitoneally with outer envelopes of serogroup icterohaemorrhagiae lai serovar strain 017 leptospires. Monoclonal antibody (McAb) E4B7D5 against outer envelopes (IgG1, agglutinating titre 1:25,600) was produced by hybridoma technique. Passive immunoprotection experiments have demonstrated the immunoprotection of McAb E4B7D5 against strain 017 leptospires. Effect of McAb E4B7D5 on leptospiral adherence to the surface of normal human pulmonary embryonic fibroblasts was observed by using scanning electron microscope. The results indicated that the leptospiral adherence noted in various agglutinating titre McAb E4B7D5 groups was less frequent than that in the three control groups. It was concluded that the inhibitory effect of McAb E4B7D5 on leptospiral adherence may play a role in the immunoprotection.
Insights
A novel monoclonal antibody (McAb) E4B7D5 was developed against Leptospira outer envelopes. This antibody demonstrated immunoprotection and inhibited leptospiral adherence, suggesting a role in preventing infection.
Area of Science:
- Immunology
- Microbiology
- Cell Biology
Background:
- Leptospirosis is a significant zoonotic disease caused by pathogenic Leptospira bacteria.
- Outer envelopes of Leptospira contain crucial antigens for immune response and vaccine development.
Purpose of the Study:
- To produce and characterize a monoclonal antibody against Leptospira outer envelopes.
- To evaluate the immunoprotective potential and mechanism of action of the developed monoclonal antibody.
Main Methods:
- Immunization of BALB/c mice with Leptospira outer envelopes.
- Production of monoclonal antibody E4B7D5 using hybridoma technology.
- Assessment of passive immunoprotection and leptospiral adherence inhibition via scanning electron microscopy.
Main Results:
- Monoclonal antibody E4B7D5 (IgG1) exhibited a high agglutinating titer (1:25,600).
- Passive immunoprotection experiments confirmed the efficacy of McAb E4B7D5 against Leptospira strain 017.
- McAb E4B7D5 significantly reduced leptospiral adherence to human pulmonary fibroblasts.
Conclusions:
- Monoclonal antibody E4B7D5 provides passive immunoprotection against Leptospira infection.
- Inhibition of leptospiral adherence by McAb E4B7D5 is a potential mechanism contributing to its immunoprotective effect.