Interrelationships of interleukin-8 with interleukin-1β and neutrophils in vaginal fluid of healthy and bacterial vaginosis positive women

Sabina Cauci, Secondo Guaschino, Domenico de Aloysio, Silvia Driussi, Davide De Santo, Paola Penacchioni, Franco Quadrifoglio

Research output: Contribution to journalArticlepeer-review

Abstract

Vaginal innate immunity in response to microbial perturbation is still poorly understood and could be crucial for protection from adverse outcomes. We investigated the relationship between interleukin (IL)-8, IL-1β and neutrophils in vaginal fluid obtained from 60 healthy women and 51 women who were bacterial vaginosis (BV) positive. Concentrations of IL-8 and IL-1β were highly correlated with counts of neutrophils in vaginal fluid of the entire population examined (111 subjects). Vaginal IL-1β concentrations were significantly higher (P <0.001) in BV positive women. There was no significant difference in IL-8 levels or number of neutrophils between healthy controls and BV positive women. None of the healthy controls with high neutrophil counts (≥75th percentile, 14 average count per field) had high concentrations of IL-1β (≥75th percentile, 220 pg/ml), whereas 84% of BV positive women with high neutrophil counts had high IL-1β concentrations (P <0.001). On the contrary, no difference in the percentage of subjects with elevated concentrations of IL-8 (≥75th percentile, 2842 pg/ml) was found between healthy and BV positive women with high numbers of neutrophils (55.5% of healthy versus 53% of BV positive women). Our findings show that BV causes a large increase in IL-1β concentrations which is not paralleled by an increase in IL-8 concentrations in vaginal fluid, suggesting that BV-associated factors more specifically dampen IL-8 rather than IL-1β. The lack of an increase in IL-8 may explain the absence of an increase in neutrophil numbers in most women exposed to abnormal vaginal colonization (BV).

Original languageEnglish
Pages (from-to)53-58
Number of pages6
JournalMolecular Human Reproduction
Volume9
Issue number1
DOIs
Publication statusPublished - Jan 1 2003

Keywords

  • Bacterial vaginosis
  • Interleukin-1β
  • Interleukin-8
  • Mucosal innate immunity
  • Vaginal leukocytes

ASJC Scopus subject areas

  • Cell Biology
  • Developmental Biology
  • Genetics
  • Embryology
  • Obstetrics and Gynaecology

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