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Monoclonal antibodies to heat shock protein 60 induce a protective immune response against experimental Paracoccidioides lutzii.
Microbes Infect. 2014 Sep; 16(9):788-95.MI

Abstract

Paracoccidioidomycosis (PCM) is an endemic mycosis in Latin America. PCM is primarily caused by Paracoccidioides brasiliensis and less frequently by the recently described, closely related species Paracoccidioides lutzii. Current treatment requires protracted administration of systemic antibiotics and relapses may frequently occur despite months of initial therapy. Hence, there is a need for innovative approaches to treatment. In the present study we analyzed the impact of two monoclonal antibodies (mAbs) generated against Heat Shock 60 (Hsp60) from Histoplasma capsulatum on the interactions of P. lutzii with macrophages and on the experimental P. lutzii infection. We demonstrated that the Hsp60-binding mAbs labeled P. lutzii yeast cells and enhanced their phagocytosis by macrophage cells. Treatment of mice with the mAbs to Hsp60 before infection reduced the pulmonary fungal burden as compared to mice treated with irrelevant mAb. Hence, mAbs raised to H. capsulatum Hsp60 are protective against P. lutzii, including mAb 7B6 which was non-protective against H. capsulatum, suggesting differences in their capacity to bind to these fungi and to be recognized by macrophages. These findings indicate that mAbs raised to one dimorphic fungus may be therapeutic against additional dimorphic fungi, but also suggests that biological differences in diseases may influence whether a mAb is beneficial or harmful.

Authors+Show Affiliations

Institute of Biomedical Sciences, Department of Microbiology, Brazil. Electronic address: lucithomaz@usp.br.Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA.Institute of Biomedical Sciences, Department of Microbiology, Brazil.Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, São Paulo, Brazil.Institute of Biomedical Sciences, Department of Microbiology, Brazil; Laboratory of Medical Mycology IMTSP- LIM53 University of São Paulo, São Paulo, Brazil.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25161111

Citation

Thomaz, Luciana, et al. "Monoclonal Antibodies to Heat Shock Protein 60 Induce a Protective Immune Response Against Experimental Paracoccidioides Lutzii." Microbes and Infection, vol. 16, no. 9, 2014, pp. 788-95.
Thomaz L, Nosanchuk JD, Rossi DC, et al. Monoclonal antibodies to heat shock protein 60 induce a protective immune response against experimental Paracoccidioides lutzii. Microbes Infect. 2014;16(9):788-95.
Thomaz, L., Nosanchuk, J. D., Rossi, D. C., Travassos, L. R., & Taborda, C. P. (2014). Monoclonal antibodies to heat shock protein 60 induce a protective immune response against experimental Paracoccidioides lutzii. Microbes and Infection, 16(9), 788-95. https://doi.org/10.1016/j.micinf.2014.08.004
Thomaz L, et al. Monoclonal Antibodies to Heat Shock Protein 60 Induce a Protective Immune Response Against Experimental Paracoccidioides Lutzii. Microbes Infect. 2014;16(9):788-95. PubMed PMID: 25161111.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Monoclonal antibodies to heat shock protein 60 induce a protective immune response against experimental Paracoccidioides lutzii. AU - Thomaz,Luciana, AU - Nosanchuk,Joshua D, AU - Rossi,Diego C P, AU - Travassos,Luiz R, AU - Taborda,Carlos P, Y1 - 2014/08/24/ PY - 2013/09/16/received PY - 2014/07/23/revised PY - 2014/08/06/accepted PY - 2014/8/28/entrez PY - 2014/8/28/pubmed PY - 2015/6/27/medline KW - Hsp60 KW - Monoclonal antibody KW - Paracoccidioides lutzii SP - 788 EP - 95 JF - Microbes and infection JO - Microbes Infect. VL - 16 IS - 9 N2 - Paracoccidioidomycosis (PCM) is an endemic mycosis in Latin America. PCM is primarily caused by Paracoccidioides brasiliensis and less frequently by the recently described, closely related species Paracoccidioides lutzii. Current treatment requires protracted administration of systemic antibiotics and relapses may frequently occur despite months of initial therapy. Hence, there is a need for innovative approaches to treatment. In the present study we analyzed the impact of two monoclonal antibodies (mAbs) generated against Heat Shock 60 (Hsp60) from Histoplasma capsulatum on the interactions of P. lutzii with macrophages and on the experimental P. lutzii infection. We demonstrated that the Hsp60-binding mAbs labeled P. lutzii yeast cells and enhanced their phagocytosis by macrophage cells. Treatment of mice with the mAbs to Hsp60 before infection reduced the pulmonary fungal burden as compared to mice treated with irrelevant mAb. Hence, mAbs raised to H. capsulatum Hsp60 are protective against P. lutzii, including mAb 7B6 which was non-protective against H. capsulatum, suggesting differences in their capacity to bind to these fungi and to be recognized by macrophages. These findings indicate that mAbs raised to one dimorphic fungus may be therapeutic against additional dimorphic fungi, but also suggests that biological differences in diseases may influence whether a mAb is beneficial or harmful. SN - 1769-714X UR - https://www.unboundmedicine.com/medline/citation/25161111/Monoclonal_antibodies_to_heat_shock_protein_60_induce_a_protective_immune_response_against_experimental_Paracoccidioides_lutzii_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1286-4579(14)00104-X DB - PRIME DP - Unbound Medicine ER -