2. Academic Validation
  3. Antifungal activity of Acylhydrazone derivatives against Sporothrix spp

Antifungal activity of Acylhydrazone derivatives against Sporothrix spp

  • Antimicrob Agents Chemother. 2021 May 1;65(5):e02593-20. doi: 10.1128/AAC.02593-20.
Jhon Jhamilton Artunduaga Bonilla 1,  Leandro Honorato 1,  Krupanandan Haranahalli 2 3,  Isabella Dib Ferreira Gremião 4,  Sandro Antonio Pereira 4,  Allan Guimarães 5,  Andrea Regina de Souza Baptista 6,  Patricia de M Tavares 1,  Marcio L Rodrigues 7 8,  Kildare Miranda 9,  Iwao Ojima 2 3,  Maurizio Del Poeta 10 11 12 13,  Leonardo Nimrichter 14
Affiliations

Affiliations

  • 1 Laboratório de Glicobiologia de Eucariotos (LaGE), Depto. Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
  • 2 Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, New York, USA.
  • 3 Department of Chemistry, Stony Brook University, Stony Brook, New York, USA.
  • 4 Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos/Instituto Nacional de Infectologia Evandro Chagas (INI)/Fundação OswaldO Cruz (Fiocruz), Rio de Janeiro, RJ, Brazil.
  • 5 Laboratório de Bioquímica e Imunologia das Micoses, Depto de Microbiologia e Parasitologia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
  • 6 Centro de Investigação de Microrganismos, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
  • 7 Instituto de Microbiologia Paulo de Góes (IMPG) da Universidade Federal do Rio de Janeiro, Brazil.
  • 8 Instituto Carlos Chagas, Fundação Oswaldo Cruz (Fiocruz), Curitiba, Brazil.
  • 9 Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho and Centro Nacional de Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro, Brazil.
  • 10 Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, New York, USA nimrichter@micro.ufrj.br maurizio.delpoeta@stonybrook.edu.
  • 11 Department of Microbiology and Immunology, Stony Brook University, Stony Brook, New York, USA.
  • 12 Division of Infectious Diseases, School of Medicine, Stony Brook University, Stony Brook, New York, USA.
  • 13 Veterans Administration Medical Center, Northport, New York, USA.
  • 14 Laboratório de Glicobiologia de Eucariotos (LaGE), Depto. Microbiologia Geral, Instituto de Microbiologia Paulo de Góes (IMPG), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil nimrichter@micro.ufrj.br maurizio.delpoeta@stonybrook.edu.
PMID: 33593845 DOI: 10.1128/AAC.02593-20
Abstract

Sporotrichosis is an emerging mycosis caused by members of the genus Sporothrix The disease affects humans and Animals, particularly cats, which plays an important role in the zoonotic transmission. Feline sporotrichosis treatment options include itraconazole (ITC), potassium iodide and amphotericin B, drugs usually associated with deleterious adverse reactions and refractoriness in cats, especially when using ITC. Thus, affordable, non-toxic and clinically effective anti-Sporothrix agents are needed. Recently, acylhydrazones (AH), molecules targeting vesicular transport and cell cycle progression, exhibited a potent Antifungal activity against several Fungal species and displayed low toxicity when compared to the current drugs. In this work, the AH derivatives D13 and SB-AF-1002 were tested against Sporothrix schenckii and Sporothrix brasiliensis Minimal inhibitory concentrations of 0.12 - 1 μg/mL were observed for both species in vitro D13 and SB-AF-1002 showed an additive effect with itraconazole. Treatment with D13 promoted yeast disruption with release of intracellular components, as confirmed by transmission electron microscopy of S. brasiliensis exposed to the AH derivatives. AH-treated cells displayed thickening of the cell wall, discontinuity of the cell membrane and an intense cytoplasmic degeneration. In a murine model of sporotrichosis, treatment with AH derivatives was more efficient than ITC, the drug of choice for sporotrichosis. The results of the preliminary clinical study in cats indicate that D13 is safe and has potential to become a therapeutic option for sporotrichosis when associated to ITC. Our results expand the Antifungal broadness of AH derivatives and suggest that these drugs could be exploited to combat sporotrichosis.

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