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09:12
A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection
Published on: June 15, 2018
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Deciphering the domain specificity of C. difficile toxin neutralizing antibodies
Leah E Cole1, Lu Li1, Utsav Jetley2
1Sanofi Pasteur, Research North America, 38 Sidney Street, Cambridge, MA 02139, USA.
Vaccine
|May 25, 2019
Summary
Antibody treatments targeting multiple domains of Clostridium difficile toxins A and B show enhanced neutralizing potency. This suggests multi-domain antibody strategies may improve therapies against C. difficile infection (CDI).
Area of Science:
- Microbiology
- Immunology
- Infectious Diseases
Background:
- Clostridium difficile infection (CDI) is a major cause of hospital-acquired diarrhea and colitis.
- Pathology is driven by toxins A (TcdA) and B (TcdB).
- Antibody responses are crucial for protection, with insufficient responses linked to recurrent CDI.
Purpose of the Study:
- To investigate the toxin domain specificity of neutralizing antibodies against TcdA and TcdB.
- To evaluate the efficacy of multi-domain targeting antibody strategies for CDI treatment and prevention.
Main Methods:
- Toxin neutralization assays using human monoclonal antibodies (mAbs) targeting different domains of TcdB.
- Assessment of serum antibodies from hamsters immunized with a toxoid vaccine candidate.
Main Results:
- Combinations of mAbs targeting multiple TcdB domains showed superior neutralizing potency compared to single-domain mAbs.
- Vaccine-induced polyclonal sera neutralized toxins more effectively than individual mAbs, targeting multiple domains of both TcdA and TcdB.
Conclusions:
- Antibody therapies targeting multiple toxin domains may offer enhanced efficacy against CDI.
- Multi-domain antibody strategies hold potential for improved therapeutic and prophylactic treatments for Clostridium difficile infection.
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