Proton pump inhibitors versus Cryptococcus species: effects on in vitro susceptibility and melanin production

Author:

Brilhante Raimunda SN1,da Rocha Maria G2,de Oliveira Jonathas S1,España Jaime DA1,Pereira Vandbergue S1,SCM Castelo-Branco Débora de1,A Pereira-Neto Waldemiro de1,Sidrim José JC1,A Cordeiro Rossana de1,Rocha Marcos FG12

Affiliation:

1. Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology & Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430–275, Fortaleza, Ceará, Brazil

2. Postgraduate Program in Veterinary Sciences, College of Veterinary, State University of Ceará. Av. Dr. Silas Munguba, 1700, Campus do Itaperi, CEP: 60714-903, Fortaleza, Ceará, Brazil

Abstract

Aim: This study aimed to evaluate the effects of proton pump inhibitors (PPIs) on growth and melanin production by Cryptococcus spp. Materials & methods: Minimum inhibitory concentrations (MICs) of omeprazole, esomeprazole, rabeprazole, pantoprazole and lansoprazole against Cryptococcus spp. were determined and the effect of PPIs on melanin production was evaluated, in the presence or absence of copper sulfate or glutathione. Results: PPIs showed MICs ranging from 125–1000 μg/ml and decreased melanization by Cryptococcus cells. Addition of copper sulfate or gluthatione restored melanogenesis of cells grown in the presence of PPIs. The presence of PPIs and glyphosate decreased copper sulfate toxicity (1 mM). Conclusion: PPIs inhibited melanogenesis of Cryptococcus spp., possibly by chelating copper or inhibiting copper ATPase transport.

Publisher

Future Medicine Ltd

Subject

Microbiology (medical),Microbiology

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