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Interactions between different Candida species in experimental candidiasis of invertebrates and vertebrates models

Grant number: 11/15194-0
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): March 01, 2012
Effective date (End): December 31, 2013
Field of knowledge:Health Sciences - Dentistry
Principal Investigator:Juliana Campos Junqueira
Grantee:Rodnei Dennis Rossoni
Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil


Whereas the high incidence of lesions of candidosis in immunocompromised patients and the emergence of non-albicans Candida species, which are often isolated in association with C. albicans in mixed infections, it becomes necessary to develop in vivo models in order to characterize the interactions among Candida species. This study will evaluate in vivo interactions between different Candida species by inducing experimental candidiasis in Galleria mellonella and immunosuppressed mice models. Standard strains of C. albicans (ATCC 18804), C. tropicalis (ATCC 13803) and C. glabrata (ATCC 90030)will be used. The larvae of G. mellonella will be inoculated with heterotypic and homotypic suspensions of Candida (105 cells / mL) and incubated for 5 days. The number of dead larvae will be evaluated daily and the survival curve and statistical analysis will be performed in the program Graph Pad Prism using the Log-rank test (Mantel-Cox). For the induction of oral candidiasis in mice, the animals will be treated with tetracycline hydrochloride (0.83 mg/mL) in drinking water and injections of prednisolone at a dose of 100 mg/kg body mass. The animals will be inoculated with 0.2 ml of homotypic or heterotypic microbial suspensions containing 108 cells/mL. After 24 hours the inoculation, samples of the tongue will be collected and seeded in HiCrome chromogenic agar for counting colony forming units per ml recovered from the oral cavity. Then the animals will be euthanized and their tongues removed for macroscopic and microscopic analysis. Data analysis of CFU/mL will be made by ANOVA and Tukey test. For the evaluation scores of macroscopic and histological analysis will be applied the Kruskal-Wallis and Bonferroni tests.

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ROSSONI, RODNEI DENNIS; BARBOSA, JUNIA OLIVEIRA; GODINHO VILELA, SIMONE FURGERI; DOS SANTOS, JESSICA DIANE; DE BARROS, PATRCIA PIMENTEL; DE AZEVEDO PRATA, MARCIA CRISTINA; ANBINDER, ANA LIA; FUCHS, BETH BURGWYN; CARDOSO JORGE, ANTONIO OLAVO; MYLONAKIS, ELEFTHERIOS; et al. Competitive Interactions between C. albicans, C. glabrata and C. krusei during Biofilm Formation and Development of Experimental Candidiasis. PLoS One, v. 10, n. 7, . (12/02184-9, 11/15194-0, 11/10071-7, 12/19915-6)
DE BARROS, PATRICIA PIMENTEL; FREIRE, FERNANDA; ROSSONI, RODNEI DENNIS; JUNQUEIRA, JULIANA CAMPOS; CARDOSO JORGE, ANTONIO OLAVO. Candida krusei and Candida glabrata reduce the filamentation of Candida albicans by downregulating expression of HWP1 gene. Folia Microbiologica, v. 62, n. 4, p. 317-323, . (11/15194-0, 12/15250-0)
VILELA, SIMONE F. G.; BARBOSA, JUNIA O.; ROSSONI, RODNEI D.; SANTOS, JESSICA D.; PRATA, MARCIA C. A.; ANBINDER, ANA LIA; JORGE, ANTONIO O. C.; JUNQUEIRA, JULIANA C.. Lactobacillus acidophilus ATCC 4356 inhibits biofilm formation by C. albicans and attenuates the experimental candidiasis in Galleria mellonella. VIRULENCE, v. 6, n. 1, p. 29-39, . (12/02184-9, 11/15194-0, 12/19915-6)
DE BARROS, PATRICIA PIMENTEL; ROSSONI, RODNEI DENNIS; RIBEIRO, FELIPE DE CAMARGO; JUNQUEIRA, JULIANA CAMPOS; CARDOSO JORGE, ANTONIO OLAVO. Temporal Profile of Biofilm Formation, Gene Expression and Virulence Analysis in Candida albicans Strains. Mycopathologia, v. 182, n. 3-4, p. 285-295, . (12/15250-0, 12/02184-9, 11/15194-0)
BARROS, PATRICIA PIMENTEL; RIBEIRO, FELIPE CAMARGO; ROSSONI, RODNEI DENNIS; JUNQUEIRA, JULIANA CAMPOS; CARDOSO JORGE, ANTONIO OLAVO. Influence of Candida krusei and Candida glabrata on Candida albicans gene expression in in vitro biofilms. ARCHIVES OF ORAL BIOLOGY, v. 64, p. 92-101, . (11/15194-0, 12/15250-0)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
ROSSONI, Rodnei Dennis. Interações entre diferentes espécies de Candida na candidose experimental em modelos de invertebrados e vertebrados. 2013. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Ciência e Tecnologia. São José dos Campos São José dos Campos.

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