Do Atopobium vaginae, Megasphaera sp and Leptotrichia sp change the local innate immune response and sialidase activity in bacterial vaginosis?

Autor(es)

Marconi, Camila ^[1] ; Donders, Gilbert G. ^{[2, 3]} ; Parada, Cristina M. G. L. ^[4] ; Giraldo, Paulo C. ^[5] ; da Silva, Marcia Guimaraes ^[1]

Afiliação do(s) autor(es)

^[1] UNESP Univ Estadual Paulista, Botucatu Med Sch, Dept Pathol, BR-18618970 Botucatu, SP - Brazil

^[2] Femicare Clin Res Women, Tienen - Belgium

^[3] Univ Hosp Gasthuisberg, Dept Gynecol & Obstet, B-3000 Louvain - Belgium

^[4] UNESP Univ Estadual Paulista, Botucatu Med Sch, Dept Nursing, BR-18618970 Botucatu, SP - Brazil

^[5] Univ Estadual Campinas, Fac Ciencias Med, Dept Gynecol & Obstet, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SEXUALLY TRANSMITTED INFECTIONS; v. 89, n. 2, p. 167-173, MAR 2013.
• Citações Web of Science: 18

Resumo

Objectives To investigate if the participation of Atopobium vaginae, Megasphaera sp. and Leptotrichia sp. in the bacterial community of bacterial vaginosis (BV) is associated with distinct patterns of this condition. Methods In this cross-sectional controlled study, 205 women with BV and 205 women with normal flora were included. Vaginal rinsing samples were obtained for measuring the levels of pro-inflammatory cytokines and bacterial sialidases. Real-time PCR was used to quantify the BV-associated bacteria and to estimate the total bacterial load using the 16S rRNA. Principal component analysis (PCA) using the measured parameters was performed to compare the BV samples with lower and higher loads of the species of interest. Results Higher bacterial load (p<0.001), levels of interleukin 1-beta (p<0.001) and sialidase activity (p<0.001) were associated with BV. Women with BV and higher relative loads of A vaginae, Megasphaera sp. and Leptotrichia sp. presented increased sialidase activity, but unchanged cytokine levels. PCA analysis did not indicate a different pattern of BV according to the loads of A vaginae, Megasphaera sp. and Leptotrichia sp. Conclusions Greater participation of A vaginae, Megasphaera sp. and Leptotrichia sp. in vaginal bacterial community did not indicate a less severe form of BV; moreover, it was associated with increased sialidase activity. (AU)

• Processo FAPESP: 09/50560-7 - Aspectos clínicos, microbiológicos e da regulação da imunidade inata na vaginose bacteriana
• Beneficiário: Márcia Guimarães da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 08/55420-6 - Aspectos clínicos, microbiológicos e da regulação da imunidade inata na vaginose bacteriana
• Beneficiário: Camila Marconi
• Modalidade de apoio: Bolsas no Brasil - Doutorado