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A Soluble Tetrazolium-Based Reduction Assay to Evaluate the Effect of Antibodies on Candida tropicalis Biofilms
Published on: September 16, 2022
Anti-beta-glucan-like immunoprotective candidacidal antiidiotypic antibodies
Walter Magliani1, Stefania Conti, Laura Giovati
1Sezione di Microbiologia, Dipartimento di Patologia e Medicina di Laboratorio, Universita degli Studi di Parma, Viale Gramsci, 14, 43100 Parma, Italy. magliwal@unipr.it
Abstract:
Mycoses, candidiasis in particular, are relatively common opportunistic infections still characterized by an unacceptable high mortality rate. Furthermore, they are often complicated by resistance or refractoriness to the existing antimicrobial agents. In recent years new effective therapeutic and large-scale preventative strategies have been proposed by exploiting the identification of fungal beta-glucans as target of antifungal agents such as echinocandins, yeast killer toxins and protective antibodies. Anti-beta-glucan antibodies are detectable in animal and human sera. When elicited by glucan-based vaccines they can exert a fungicidal protective activity. Beta-glucan cell wall killer toxin receptors can elicit fungicidal protective antibodies following natural and experimental infections. When used as an immunogen a killer toxin-neutralizing monoclonal antibody (beta-glucan-like) is able to elicit a significant anticandidal protection mediated by anti-idiotypic anti-beta-glucan-like candidacidal antibodies. Polyclonal, monoclonal and recombinant anti-beta-glucan-like antibodies and peptide mimotopes are able to exert an in vitro and/or in vivo microbicidal activity against eukaryotic and prokaryotic killer toxin receptor-bearing pathogenic microorganisms. Implications and perspectives for transphyletic anti-infectious control strategies, as immunoprevention and immunotherapy, are discussed.
Insights
New strategies targeting fungal beta-glucans show promise for treating candidiasis. Anti-beta-glucan antibodies can provide fungicidal protection against Candida infections, offering new avenues for immunoprevention and immunotherapy.
Area of Science:
- Mycology
- Immunology
- Infectious Diseases
Background:
- Candidiasis presents a high mortality rate and challenges due to antimicrobial resistance.
- Fungal beta-glucans are identified as key targets for novel antifungal therapies.
- Existing treatments face limitations, necessitating innovative approaches.
Purpose of the Study:
- To explore the potential of anti-beta-glucan antibodies in combating candidiasis.
- To investigate the role of beta-glucan cell wall killer toxin receptors in eliciting protective immunity.
- To assess the efficacy of anti-idiotypic antibodies and peptide mimotopes against pathogenic microorganisms.
Main Methods:
- Detection of anti-beta-glucan antibodies in sera.
- Elicitation of fungicidal protective activity using glucan-based vaccines.
- Utilizing killer toxin-neutralizing monoclonal antibodies as immunogens.
- Evaluating in vitro and in vivo microbicidal activity of antibodies and mimotopes.
Main Results:
- Anti-beta-glucan antibodies are present in animal and human sera.
- Glucan-based vaccines and killer toxin receptors can induce protective anticandidal antibodies.
- Anti-idiotypic anti-beta-glucan-like antibodies mediate anticandidal protection.
- Antibodies and mimotopes demonstrate microbicidal activity against various pathogens.
Conclusions:
- Anti-beta-glucan antibodies represent a viable strategy for candidiasis treatment and prevention.
- Targeting fungal beta-glucans offers a transphyletic approach to anti-infectious control.
- Immunoprevention and immunotherapy using anti-beta-glucan strategies hold significant therapeutic potential.
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