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Related Experiment Videos

Effect of antibiotics on rat leukocyte function

T Miyata1, M Shinohara

  • 1Department of Pharmacology, Osaka Dental University, Japan.

Journal of Osaka Dental University
|January 1, 1999
PubMed
Summary

Antibiotics can impact immune cells. This study shows that while some antibiotics at low doses enhance macrophage chemotaxis, higher concentrations and most agents inhibit both chemotaxis and phagocytosis.

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Area of Science:

  • Immunology
  • Pharmacology
  • Microbiology

Background:

  • Antibiotics are crucial for treating infections by enhancing immune cell functions.
  • Polymorphonuclear leukocytes and macrophages play key roles in phagocytosis and bacterial killing at infection sites.

Purpose of the Study:

  • To investigate the effects of seven different antibiotics on macrophage chemotaxis and phagocytosis.
  • To determine dose-dependent effects of ampicillin (ABPC), cephalexin (CEX), cefotiam (CTM), amikacin (AMK), clindamycin (CLDM), tetracycline (TC), and bleomycin (BLM) on immune cell functions.

Main Methods:

  • Macrophages were exposed to varying concentrations (1, 10, and 100 micrograms/ml) of seven antibiotics.
  • Chemotaxis was assessed by measuring directed cell movement.
  • Phagocytosis was evaluated using phagocytosis ratio and index measurements.

Main Results:

  • At 1 and 10 micrograms/ml, several antibiotics (CLDM, AMK, CTM, TC, BLM, ABPC) significantly altered macrophage chemotaxis compared to controls.
  • At 100 micrograms/ml, all tested antibiotics significantly inhibited chemotaxis.
  • Most antibiotics, except ABPC, significantly reduced phagocytosis ratio and index in a dose-dependent manner, with notable effects from BLM and AMK.

Conclusions:

  • Antibiotics exhibit varied effects on macrophage chemotaxis and phagocytosis.
  • Higher concentrations of most antibiotics tested can impair crucial immune functions, potentially impacting infection clearance.
  • Further research is needed to understand the clinical implications of these immunomodulatory effects.

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