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[Il6st gene mRNA and gp130 protein distribution in the brain structures in mice differing in exagerrated freezing reaction (catalepsy)].

Glycoprotein gp130 is involved in the intracellular transduction of signals from receptors ofinterleukin-6--related cytokines. The linkage between Il6st gene encoding gp130 and predisposition to excessive freezing (catalepsy) in mice was shown. The aim of present study was to investigate the Il6st mRNA concentration, the level and the rate of glycosilation of gp130 in five brain structures in catalepsy-resistant AKR/J mice strain and in catalepsy-prone CBA/LacJ, AKR.CBA-D13Mit76 with the CBA-derived Il6st gene variant in the AKR/J genome, and ASC created by selection of back-crosses between CBA and AKR strains on catalepsy. Highest concentrations of the nonglycosilated and the glycosilated gp130 protein levels were detected in the midbrain. High levels of Il6st mRNA were discovered in the midbrain, the striatum and the hypothalamus in all mouse strains. The level of Il6st mRNA in the striatum of AKR.CBA-D13Mit76 mice was significantly higher compared with AKR/J. An association between hereditary catalepsy and Il6st expression in the striatum in mice was suggested.