Cyclical Abnormalities in the Bactericidal Function, Superoxide Production, and Lysozyme Activity of Neutrophils Obtained from a Healthy Woman During Menstruation: Reversal by Pretreatment with Aspirin

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Abstract
Neutrophils obtained from most of 13 healthy young women during menstruation and those obtained from the same women on nonmenstrual days killed comparable numbers of Staphylococcus aureus strain 502A, produced comparable amounts of superoxide anion, and had comparable lysozyme levels. In contrast, neutrophils obtained from a few women during menstruation exhibited decreased function. In particular, neutrophils from one healthy woman developed transient menstrual period-related abnormalities in bactericidal function, superoxide anion production, and lysozyme activity and release; these abnormalities occurred during each of three menstrual periods tested but not during three menstrual periods following the ingestion of aspirin for 14 days. The results suggest that menstrual period-related dysfunction of neutrophils may occur in some healthy women, sometimes rendering them more susceptible to menstrual periodrelated infections.