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Doxycycline effects on the adherence of polymorphonuclear leukocytes to an albumin-coated glass surface
C Dahlgren1, B Norberg, S Eriksson
1Department of Medical Microbiology, University Hospital, Linköping, Sweden.
Abstract:
The effect of doxycycline on polymorphonuclear leukocyte (PMN) adherence to albumin-coated glass surfaces was studied in the absence and presence of the chemotactic peptide FMLP. Three concentrations of doxycycline were studied, one subtherapeutic (0.1 micrograms/ml), one therapeutic (1.0 micrograms/ml) and one supertherapeutic (10 micrograms/ml). PMN adherence was maximal after incubation for 5 min. FMLP did not affect PMN adherence in the present assay system and at the concentration studied (10(-7)M). PMN adherence remained stable and unaffected in the tested doxycycline concentrations. Thus, the present study could not confirm the reported and challenged doxycycline inhibition of PMN adherence.
Insights
This study investigated doxycycline
Area of Science:
- Pharmacology
- Immunology
- Cell Biology
Background:
- Doxycycline is an antibiotic with known anti-inflammatory properties.
- Previous research suggested doxycycline may inhibit polymorphonuclear leukocyte (PMN) adherence.
Purpose of the Study:
- To investigate the effect of doxycycline on PMN adherence to albumin-coated surfaces.
- To determine if doxycycline affects PMN adherence in the presence or absence of the chemotactic peptide FMLP.
Main Methods:
- Polymorphonuclear leukocytes (PMNs) were incubated with varying concentrations of doxycycline (0.1, 1.0, 10 micrograms/ml).
- PMN adherence to albumin-coated glass surfaces was measured.
- Experiments were conducted with and without the chemotactic peptide FMLP (10(-7)M).
Main Results:
- PMN adherence peaked at 5 minutes of incubation.
- FMLP did not significantly alter PMN adherence in this experimental setup.
- Doxycycline, across subtherapeutic, therapeutic, and supertherapeutic concentrations, did not affect PMN adherence.
Conclusions:
- The study did not find evidence to support the claim that doxycycline inhibits PMN adherence.
- Further research may be needed to clarify the role of doxycycline in modulating leukocyte function.