Cervicovaginal fluid and semen block the microbicidal activity of hydrogen peroxide produced by vaginal lactobacilli.
Cervicovaginal fluid and semen block the microbicidal activity of hydrogen peroxide produced by vaginal lactobacilli.
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DOI:
10.1186/1471-2334-10-120
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发表时间:
2010-05-19
影响因子:
3.7
通讯作者:
Cone RA
中科院分区:
文献类型:
--
作者:
O'Hanlon DE;Lanier BR;Moench TR;Cone RA
H2O2 produced by vaginal lactobacilli is believed to protect against infection, and H2O2-producing lactobacilli inactivate pathogens in vitro in protein-free salt solution. However, cervicovaginal fluid (CVF) and semen have significant H2O2-blocking activity. We measured the H2O2 concentration of CVF and the H2O2-blocking activity of CVF and semen using fluorescence and in vitro bacterial-exposure experiments. The mean H2O2 measured in fully aerobic CVF was 23 ± 5 μM; however, 50 μM H2O2 in salt solution showed no in vitro inactivation of HSV-2, Neisseria gonorrhoeae, Hemophilus ducreyii, or any of six BV-associated bacteria. CVF reduced 1 mM added H2O2 to an undetectable level, while semen reduced 10 mM added H2O2 to undetectable. Moreover, the addition of just 1% CVF supernatant abolished in vitro pathogen-inactivation by H2O2-producing lactobacilli. Given the H2O2-blocking activity of CVF and semen, it is implausible that H2O2-production by vaginal lactobacilli is a significant mechanism of protection in vivo.
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影响因子:
6.4
作者:
KLEBANOFF, SJ;HILLIER, SL;WALTERSDORPH, AM
通讯作者:
WALTERSDORPH, AM
DOI:
10.1016/j.ejogrb.2005.11.036
发表时间:
2006-11-01
影响因子:
2.6
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影响因子:
2.3
作者:
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通讯作者:
Bakalov, Boris V.
影响因子:
6.4
作者:
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通讯作者:
Kreiss, J