A comparative study on immunosuppressive effects of cyclosporin A and FK 506 on peripheral blood lymphocytes in dogs

Kyoichi Takaori, Yoshinori Nio, Kazutomo Inoue, Thein Tun, Manaba Fukumoto, Tohru Hashida, Masato Yasuhara, Ryohei Hori, Takayoshi Tobe

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18 Citations (Scopus)

Abstract

Immunosuppressive effects of cyclosporin A (CsA) and FK 506 (FK) on peripheral blood lymphocytes were studied in dogs in respect to mixed lymphocyte reaction, proliferative responses to recombinant interleukin-2 (rIL-2), phytohemagglutinin (PHA) and concanavalin-A (Con-A); phenotypes of OKIa1, CD3, CD8 and surface IgM; cytotoxic activity against xenogeneic tumor cells. CsA (2.0 or 5.0 mg/kg, intravenously) or FK (0.16 mg/kg, intramuscularly) was given to mongrel dogs every morning for serial 21 days. The blood concentrations of CsA, measured as trough levels by fluorescence polarization method, ranged from 37 to 350 ng/ml in dogs administered at 2.0 mg/kg and from 170 to 894 ng/ml in dogs administered at 5.0 mg/kg during treatment, respectively. In dogs treated with FK at a dose of 0.16 mg/kg, the drug concentrations in the plasma during treatment ranged from 0.16 to 1.8 ng/ml. Mixed lymphocyte reaction and proliferative responses to rIL-2, PHA and Con-A, which were declined by CsA, were not affected by FK. In contrast, the proportion of OKIa1+ cells was not affected by CsA, whereas FK decreased the proportion of OKIa1+ cells progressively during the course of treatment. Cytotoxic activity was suppressed by both CsA and FK. These results possibly indicate that CsA and FK exert their immunosuppressive effects via different mechanisms.

Original languageEnglish
Pages (from-to)129-137
Number of pages9
JournalBiotherapy
Volume4
Issue number2
DOIs
Publication statusPublished - 1992 Jun 1

Keywords

  • FK 506
  • canine immunity
  • cyclosporin A
  • immunosuppression
  • transplantation

ASJC Scopus subject areas

  • Pharmacology

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    Takaori, K., Nio, Y., Inoue, K., Tun, T., Fukumoto, M., Hashida, T., Yasuhara, M., Hori, R., & Tobe, T. (1992). A comparative study on immunosuppressive effects of cyclosporin A and FK 506 on peripheral blood lymphocytes in dogs. Biotherapy, 4(2), 129-137. https://doi.org/10.1007/BF02171757