Production of heat shock proteins, cytokines, and nitric oxide in toxic stress.
Expression of heat shock proteins Hsp27, Hsp90, and Hsp70 and production of tumor necrosis factors (TNF-alpha, TNF-beta), interferon-gamma (IFN-gamma), interleukin-2, -3, -6, and nitric oxide (NO) were studied under conditions of acute and chronic intoxication of animals with lipopolysaccharides. Injection of endotoxin increased expression of heat shock proteins Hsp70 and Hsp90-alpha in mouse cells. Acute toxic stress also provoked a sharp increase in the production of TNF-alpha, TNF-beta, and NO in mouse cells. The production of other cytokines (interleukins and IFN-gamma) was changed insignificantly. In the model of chronic toxic stress, changes in the production of Hsp70, Hsp90, TNF, and NO were followed during 11 days after the beginning of the toxin injections. The expression of Hsp70 and Hsp90 in acute stress was significantly higher than at the final stage of the chronic exposure. The changes in the TNF and NO productions, on one hand, and the production of heat shock proteins, on the other hand, were synchronous. The findings indicate that repeated injections of increasing endotoxin doses result in a decreased ability of the body cells to respond to stress by overproduction of heat shock proteins, TNF, and NO.
Novoselova
E G
EG
Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, 142290 Moscow Region, Russia. elenanov@icb.psn.ru
Glushkova
O V
OV
Cherenkov
D A
DA
Parfenyuk
S B
SB
Novoselova
T V
TV
Lunin
S M
SM
Khrenov
M O
MO
Guzhova
I V
IV
Margulis
B A
BA
Fesenko
E E
EE
D000818:Animals; D016207:Cytokines / Q000096:biosynthesis*; D019446:Endotoxemia / Q000139:chemically induced / Q000378:metabolism*; D055551:HSP27 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins / Q000096:biosynthesis / Q000378:metabolism; D018841:HSP90 Heat-Shock Proteins / Q000096:biosynthesis / Q000378:metabolism; D006360:Heat-Shock Proteins / Q000096:biosynthesis* / Q000378:metabolism; D008070:Lipopolysaccharides / Q000008:administration & dosage / Q000378:metabolism / Q000633:toxicity; D008233:Lymphotoxin-alpha / Q000378:metabolism; D008264:Macrophages / Q000166:cytology / Q000378:metabolism; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009569:Nitric Oxide / Q000096:biosynthesis*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
D016207:Cytokines; D055551:HSP27 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins; D018841:HSP90 Heat-Shock Proteins; D006360:Heat-Shock Proteins; C486699:Hspb2 protein, mouse; D008070:Lipopolysaccharides; D008233:Lymphotoxin-alpha; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide