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alpha defensins genes and Vulvovaginal Candidiasis:A Study of Cases

Open Journal of Obstetrics and Gynecology 2015年第9期5卷 487-493页

作者： Humberto F Boatto Elaine C.Francisco Joao P.Kleine Ismael D.Silva Manoel J.B.C.Girao Alexandre P.Machado Olga Fischman Medical Clinic Department Medical FacultyUniversity of Mogi das CruzesMogi das CruzesBrazil Mycology Laboratory MicrobiolologyImmunology and Parasitology DepartmentFederal University of Sao PauloSao PauloBrazil Gynecology Department Federal University of Sao PauloSao PauloBrazil Molecular Oncology Research Center Barretos Cancer HospitalPio XII FoundationBarretosBrazil Microbiology Laboratory of Health Basic Sciences Department Medical FacultyFederal University of Mato GrossoCuiabáBrazil

Objective: To evaluate the alpha-defensin (α-DF) genes polymorphism in women with vulvovaginal candidiasis and recurrence. Methods: This observational study included clinical vaginal secretion samples collected over four years from 88 women, ranging in age from 18 to 65 years, from medical centers of Sao Paulo and Mogi das Cruzes, Brazil. Thirty-six of these women were asymptomatic (control group) and 52 presented clinical condition compatible with vulvovaginitis (38 primary or episodic as non-recurrent forms, and 14 recurrent vulvovaginal candidiasis). A portion of each sample was plated on Sabouraud dextrose agar with chloramphenicol and grown on CHROMagar Candida for presumptive characterization. The identification of the species was obtained by sequencing of the ITS1 region of rDNA. α-DF genes were amplified for subsequent evaluation of polymorphisms by endonuclease restriction assay. Results: From 88 samples were isolated 60 Candida albicans and 28 non-albicans Candida spp. Resistant C. albicans strains and non-albicans Candida spp. were more prevalent in recurrence. In all groups, the number of resistant non-albicans Candida spp. was most high than susceptible strains. α-DF1, α-DF3 and α-DF1/α-DF3 genotypes were found in 32 (36.4%), 17 (19.3%), 6 (6.8%) vaginal samples, respectively. About 33 samples were not amplified. Recurrence and severe disease were more observed in homozygous population. Conclusions: Non-albicans Candida spp. and homozygotic α-DF genotipes (α-DF1 and α-DF3) were more related with severe clinical signs and recurrence. Further studies about vulvovaginal candidiasis and α-DF genes are necessary to access the more comprehensive role of defensins in clinical manifestations.

关键词： alpha-defensin genes Candida albicans Non-Albicans Candida Vulvovaginal Candidiasis Recurrent Vulvovaginal Candidiasis

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