Diurnal Variation in Neutrophil Function

Masahiko Shiraishi*, Katsuhiko Suzuki, Tatsuya Abe, Takashi Kikuchi, Hideki Satoh, Shigeyuki Nakaji, Kazuo Sugawara

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Neutrophil functions, including chemotaxis, reactive oxygen species (ROS)-producing capacity of neutrophils, and serum opsonic activity were investigated in 9 young healthy male volunteers. Venous blood of these volunteers was obtained under standardized conditions at 4-h intervals over a 24-h span. Neutrophil chemotaxis was evaluated by a modified Boyden technique, ROS-producing capacity of neutrophils and serum opsonic activity were measured by a simultaneous multiple measurement system based on luminol-dependent chemiluminescence and indicated by peak height and peak time. ROS-producing capacity of neutrophils and serum opsonic activity were activated in the daytime, and decreased from night to morning. There were negative correlations between the peak time of the luminol-dependent chemiluminescent response, neutrophil number (p<0.01) and segmented neutrophil number (p<0.01). On the other hand, no significant correlations were noted between serum opsonic activity and IgG, IgA, IgM, C3 or C4. In contrast, the peaks of neutrophil chemotaxis were at the wake-up time (6:00a.m.) and in the evening (6:00p.m.). This study indicates that diurnal variation of neutrophil function exists.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalEnvironmental Health and Preventive Medicine
Issue number2
Publication statusPublished - 1996 Jan 1
Externally publishedYes


  • Diurnal variation
  • Neutrophil chemotaxis
  • Reactive oxygen species-producing capacity of human neutrophils
  • Serum opsonic activity

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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