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Passive Administration of Monoclonal Antibodies Against H. capsulatum and Others Fungal Pathogens
09:57

Passive Administration of Monoclonal Antibodies Against H. capsulatum and Others Fungal Pathogens

Published on: February 14, 2011

Mycobactericidal activity of human natural, monoclonal, and recombinant yeast killer toxin-like antibodies

S Conti1, F Fanti, W Magliani

  • 1Istituto di Microbiologia, Facoltà di Medicina e Chirurgia, Università degli Studi di Parma, Italy.

The Journal of Infectious Diseases
|March 14, 1998
PubMed

Insights

Novel candidacidal antibodies demonstrated lethal effects against multidrug-resistant Mycobacterium tuberculosis. This discovery offers a promising new immunotherapeutic strategy for tuberculosis treatment.

Area of Science:

  • Immunology
  • Microbiology
  • Biotechnology

Background:

  • Antibiotic resistance in Mycobacterium tuberculosis poses a significant global health threat.
  • The yeast Pichia anomala killer toxin (KT) exhibits broad-spectrum antibiotic activity.
  • Internal image antibodies targeting KT were previously characterized.

Purpose of the Study:

  • To investigate the efficacy of candidacidal antibodies against a multidrug-resistant Mycobacterium tuberculosis isolate.
  • To explore the potential of these antibodies as an immunotherapeutic approach for tuberculosis.

Main Methods:

  • Production of human natural (KTAb), murine monoclonal (KTMAb), and single-chain recombinant (KTScFv) candidacidal antibodies.
  • Testing the antibodies' lethal effect on a KT-sensitive multidrug-resistant Mycobacterium tuberculosis isolate.
  • Assessing antibody binding to bacterial cell surfaces and inhibition by specific absorption.

Main Results:

  • KTAb, KTMAb, and KTScFv exhibited a lethal effect against the multidrug-resistant Mycobacterium tuberculosis isolate.
  • Mycobactericidal activity correlated with antibody binding to the bacterial cell surface.
  • Binding was specifically inhibited by absorption with MAb KT4.

Conclusions:

  • Candidacidal antibodies targeting the Pichia anomala killer toxin internal image show potent activity against multidrug-resistant Mycobacterium tuberculosis.
  • These findings suggest a novel and potentially effective immunotherapeutic strategy for tuberculosis.

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