Interleukin-6 prevents cultured cerebellar granule neurons from glutamate-induced neurotoxicity / 中国应用生理学杂志
Chinese Journal of Applied Physiology
;
(6): 310-315, 2006.
Article
Dans Chinois
| WPRIM
| ID: wpr-253157
ABSTRACT
<p><b>AIM</b>To explore IL-6 neuroprotection against glutamate-induced neurotoxicity and primary mechanisms involved in this neuroprotection.</p><p><b>METHODS</b>The cerebellar granule neurons from postnatal 8-day infant rats were chronically exposed to IL-6 for 8 days, and then glutamate stimulated the cultured cerebellar granule neurons for 15 min. Methyl-thiazole-tetrazolium (MTT) assay and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) method were used to observe the changes of neuronal vitality and apoptosis, respectively. Laser scanning confocal microscope (LSCM) and reverse transcription-polymerase chain reaction (RT-PCR) were respectively employed to measure dynamic changes of intracellular Ca2+ levels and expression of gp130 mRNA, a 130-kDa intracellular IL-6 signal-transduction protein, in the neurons.</p><p><b>RESULTS</b>The chronic IL-6 (2.5, 5 and 10 ng/ml) pretreatment of the cultured cerebellar granule neurons remarkably improved the decreased neuronal vitality by glutamate in a concentration-dependent manner. The neuronal apoptosis induced by glutamate was significantly attenuated by the chronic IL-6 pretreatment. The intracellular Ca2+ overload evoked by glutamate was also inhibited by the chronic IL-6 pretreatment. The expression of gp130 mRNA was dramatically lower in the IL-6-pretreated cerebellar granule neurons than in the IL-6-untreated neurons.</p><p><b>CONCLUSION</b>IL-6 can protect neurons against glutamate-induced exciting neurotoxicity. The mechanism of IL-6 neuroprotection may be closely related to the suppression of glutamate-induced intracellular Ca2+ overload and mediated by gp130 intracellular signal transduction pathways.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Pharmacologie
/
Cellules cultivées
/
Cervelet
/
Interleukine-6
/
Rat Sprague-Dawley
/
Neuroprotecteurs
/
Acide glutamique
/
Syndromes neurotoxiques
/
Biologie cellulaire
/
Toxicité
Limites du sujet:
Animaux
langue:
Chinois
Texte intégral:
Chinese Journal of Applied Physiology
Année:
2006
Type:
Article
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