Human recombinant interleukin-2125 induced in vitro proliferation of equine, caprine, ovine, canine and feline peripheral blood lymphocytes

Brad W. Fenwick, Caroline E. Schore, Bennie Osburn

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17 Scopus citations


Equine, caprine, ovine, canine and feline peripheral blood lymphocytes were evaluated in a short term dose-response study for their in vitro blastogenic responsiveness to human recombinant interleukin-2125 (HrIL-2125) alone or in combination with phytohemagglutinin-P, concanavalin-A, and pokeweed mitogen. HrIL-2125 induced lymphocyte proliferation in all of the animals tested. The magnitude of the proliferative response varied among the species of animal tested. In all cases the proliferative response was dependent on the concentration of HrIL-2125. HrIL-2125 at a minimum concentration of 102 Cetus Units (CU)/ml produced a significant proliferative response in isolated horse, goat and sheep lymphocytes. In cat and dog lymphocytes, a concentration of 103 CU/ml was necessary to induce a significant proliferative response. Maximal lymphocyte proliferation was reached in horses and sheep at a concentration of 104 CU/ml of HrIL-2125. In goats, cats, and dogs a maximum proliferative response was found to be at a concentration equal to or greater than 104 CU/ml of HrIL-2. Co-stimulation of lymphocytes with mitogens and submaximal concentrations of HrIL-2125 (10 CU/ml) induced a synergistic proliferative response which in nearly all cases was significantly greater (P < 0.05) than the arithmetic sum of the responses induced by the same concentration of the mitogens and HrIL-2125 alone. The two exceptions were co-stimulation of feline lymphocytes with concanavalin-A and co-stimulation of canine lymphocytes with pokeweed mitogen.

Original languageEnglish (US)
Pages (from-to)51-60
Number of pages10
JournalComparative Immunology, Microbiology and Infectious Diseases
Issue number1
StatePublished - Jan 1 1988


  • cat
  • dog
  • goat
  • horse
  • immunology
  • Interleukin-2
  • lymphocyte
  • lymphokine
  • sheep

ASJC Scopus subject areas

  • Immunology and Allergy
  • Microbiology
  • Immunology
  • veterinary(all)
  • Infectious Diseases


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