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Updated: Jul 18, 2026

Establishment of a High-throughput Setup for Screening Small Molecules That Modulate c-di-GMP Signaling in Pseudomonas aeruginosa
Published on: June 30, 2016
The bacterial second messenger cyclic diGMP exhibits potent adjuvant properties
Thomas Ebensen1, Kai Schulze, Peggy Riese
1Department of Vaccinology, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany.
Bis-(3',5')-cyclic dimeric guanosine monophosphate (cdiGMP) shows strong adjuvant properties. Co-administration with antigens significantly boosts immune responses, suggesting cdiGMP is a promising vaccine adjuvant.
Area of Science:
- Vaccinology
- Immunology
- Molecular Biology
Background:
- Adjuvants are crucial for enhancing vaccine efficacy.
- Novel adjuvant identification is a key area in vaccine research.
Purpose of the Study:
- To investigate the adjuvant properties of bis-(3",5")-cyclic dimeric guanosine monophosphate (cdiGMP).
- To evaluate the impact of cdiGMP on immune responses when co-administered with an antigen.
Main Methods:
- Mice were immunized subcutaneously with beta-galactosidase (beta-Gal) alone or co-administered with cdiGMP.
- Antigen-specific serum IgG titers were measured.
- Cellular immune responses, including Th1/Th2 patterns and responses to specific epitopes, were analyzed.
Main Results:
- Co-administration of cdiGMP with beta-Gal significantly increased antigen-specific serum IgG titers compared to beta-Gal alone.
- Robust cellular immune responses with a balanced Th1/Th2 profile were observed.
- Responses to both the full beta-Gal protein and a key peptide epitope were enhanced.
Conclusions:
- cdiGMP demonstrates potent adjuvant properties.
- cdiGMP effectively enhances both humoral and cellular immunity.
- cdiGMP represents a promising candidate adjuvant for future vaccine development.
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