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[Effect of FK506 on cytokine secretion in whole blood]

He Yi1, Li Min, Zhan-guo Liu

  • 1Institute of Transplant Immunology, Department of Organ Transplant, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China. heyidiyi@163.com

Nan Fang Yi Ke Da Xue Xue Bao = Journal of Southern Medical University
|February 18, 2010
PubMed
Abstract

Insights

FK506 significantly inhibits multiple pro-inflammatory cytokines, including Interleukin-6 (IL-6), Interferon-gamma (IFN-gamma), and Tumor Necrosis Factor-alpha (TNF-alpha), in healthy individuals. Monitoring these cytokine levels may help assess FK506 dosage effectiveness.

Area of Science:

  • Immunology
  • Pharmacology

Background:

  • FK506 (Tacrolimus) is an immunosuppressant drug.
  • Understanding its effects on cytokine profiles is crucial for optimizing therapeutic use.

Purpose of the Study:

  • To investigate the impact of FK506 on the secretion of various cytokines in whole blood from healthy donors.
  • To explore FK506's potential role in immunosuppression via cytokine inhibition.

Main Methods:

  • Whole blood samples from healthy volunteers were treated with varying concentrations of FK506.
  • Samples were stimulated with phorbol 12-myristate 13-acetate (PMA) and ionomycin (IONO).
  • Cytokine levels (IL-2, IL-6, IL-12, IL-17, IFN-gamma, TNF-alpha, GM-CSF, G-CSF) were quantified using the Bio-Plex suspension array system.

Main Results:

  • High-concentration FK506 (20 ng/ml) significantly suppressed the secretion of IL-2, IL-6, IL-12, IL-17, IFN-gamma, TNF-alpha, GM-CSF, and G-CSF.
  • Moderate FK506 concentration (5 ng/ml) showed significant inhibition of GM-CSF secretion.

Conclusions:

  • FK506 effectively inhibits key pro-inflammatory cytokines (IL-6, IFN-gamma, TNF-alpha) and other cytokines (IL-2, IL-12, IL-17, GM-CSF, G-CSF).
  • FK506 likely exerts immunosuppression by reducing cytokine production from immune cells.
  • Measuring these cytokine levels could be a potential biomarker for evaluating FK506 dose adequacy.

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