Pflügers Archiv

, Volume 419, Issue 6, pp 616–621 | Cite as

Characterization and mechanism of fever induction by interleukin-1 beta

  • Masaaki Hashimoto
Heart, Circulation, Respiration and Blood; Environmental and Exercise Physiology


To investigate the relation of arachidonate metabolism to the induction of fever by interleukin-1, indomethacin was administered in either an intracerebro-ventricular (icv) or a subcutaneous (sc) route in conscious rabbits. Fever induced by icv administration of recombinant human interleukin-1β (rhIL-1β) was depressed by either icv or sc pretreatment with indomethacin. Fever induced by intravenous (iv) administration of rhIL-1β was significantly inhibited, though initial small increase in colonic temperature still remained, and was completely depressed by combination of icv and sc pretreatment with indomethacin. Intracerebroventricularly administered recombinant rabbit IL-1β (rrIL-1β) induced dose-dependent increases in colonic temperature, which was depressed by sc pretreatment with indomethacin. There is little species specificity between human and rabbit IL-1β, in terms of the pyrogenic potency and the inhibitory effect of sc indomethacin on fever induced by icv IL-1β. Further, fever caused by icv administration of sodium arachidonate was significantly depressed by sc pretreatment with indomethacin. These results show that the inhibitory effect of indomethacin, administered either icv or sc, on IL-1β-induced fever is similar to that of IL-1α-induced fever reported previously [11]. This suggests that the site of arachidonate metabolism significantly involved in the mechanism of fever induction by IL-1 is easily accessible to the brain from the blood.

Key words

Recombinant human interleukin-1β (rhIL-1βRecombinant rabbit interleukin-1β (rrIL-1βEndogenous pyrogen Blood brain barrier Arachidonate metabolism Prostaglandin Species specificity 


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Masaaki Hashimoto
    • 1
  1. 1.Department of PhysiologyYamanashi Medical CollegeYamanashiJapan

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