Platonin, a cyanine photosensitizing dye, inhibits pyrogen release and results in antipyresis.
Intravenous injection of the supernatant fluids from human peripheral blood mononuclear cells (PBMC) incubated with lipopolysaccharide (LPS) caused fever in rabbits. The fever was in parallel with the levels of either interleukin-1 beta (IL-1 beta), IL-6, or tumor necrosis factor-alpha (TNF-alpha) in supernatant fluids. When incubating the platonin with the LPS-human PBMC, both the levels of IL-1 beta, IL-6, or TNF-alpha in supernatant fluids and the pyrogenicity of supernatant fluids were significantly suppressed. The febrile response to supernatant fluids from the LPS-stimulated PBMC was attenuated almost completely by adding anti-IL-1 beta, but not anti-IL-6 or anti-TNF-alpha, monoclonal antibody to supernatant fluids. In addition, both the fever and the increased levels of either IL-1 beta, IL-6, or TNF-alpha in rabbit serum following an intravenous administration of LPS were significantly attenuated by pretreatment with an intravenous dose of platonin. Furthermore, the fever induced by intravenous injection of IL-1 beta was reduced by pretreatment of rabbits with intravenous injection of platonin. The data indicate that platonin inhibits production of pyrogenic cytokines (in particular, IL-1 beta) from PBMC and results in antipyresis.
Lee
Jie-Jen
JJ
Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan.
Huang
Wu-Tein
WT
Shao
Dong-Zi
DZ
Liao
Jyh-Fei
JF
Lin
Mao-Tsun
MT
D018712:Analgesics, Non-Narcotic / Q000494:pharmacology*; D000818:Animals; D002232:Carbocyanines / Q000494:pharmacology*; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000378:metabolism; D008297:Male; D017319:Photosensitizing Agents / Q000494:pharmacology*; D011749:Pyrogens / Q000037:antagonists & inhibitors*; D011817:Rabbits; D013844:Thiazoles / Q000494:pharmacology*
D018712:Analgesics, Non-Narcotic; D002232:Carbocyanines; D017319:Photosensitizing Agents; D011749:Pyrogens; D013844:Thiazoles; C032149:platonin