Periódicos Brasileiros em Medicina Veterinária e Zootecnia

Antifungal activity of lectins against yeast of vaginal secretion

Severo Gomes, BrunoBeatriz Sotero Siqueira, Anade Cássia Carvalho Maia, RitaGiampaoli, VivianaHolanda Teixeira, EdsonVassiliepe Sousa Arruda, FranciscoSantiago do Nascimento, KyriaNunes de Lima, AdrianaMaria Souza-Motta, CristinaSousa Cavada, BenildoLúcia Figueiredo Porto, Ana

Lectins are carbohydrate-binding proteins of non-imune origin. This group of proteins is distributed widely in nature and they have been found in viruses, microorganisms, plants and animals. Lectins of plants have been isolated and characterized according to their chemical, physical-chemical, structural and biological properties. Among their biological activities, we can stress its fungicidal action. It has been previously described the effect of the lectins Dviol, DRL, ConBr and LSL obtained from the seeds of leguminous plants on the growth of yeasts isolated from vaginal secretions. In the present work the experiments were carried out in microtiter plates and the results interpreted by both methods: visual observations and a microplate reader at 530nm. The lectin concentrations varied from 0.5 to 256µg/mL, and the inoculum was established between 65-70% of trammitance. All yeast samples isolated from vaginal secretion were evaluated taxonomically, where were observed macroscopic and microscopic characteristics to each species. The LSL lectin did not demonstrate any antifungal activity to any isolate studied. The other lectins DRL, ConBr and DvioL, showed antifungal potential against yeast isolated from vaginal secretion. These findings offering offer a promising field of investigation to develop new therapeutic strategies against vaginal yeast infections, collaborating to improve women's health.

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