Abstract
The expression of mRNAs for the glial glutamate transporters, GLT-1 and GLAST, in the rat brain accompanied with morphine dependence and naloxone-precipitated withdrawal was investigated by Northern blot analysis. The expression of GLT-1 mRNA was significantly decreased in the striatum and thalamus of morphine-dependent rats, and significantly increased in the striatum 2 h after the naloxone-precipitated withdrawal, compared with that of naive rats. On the other hand, there were no significant changes in GLAST mRNA level in any brain region. These results suggest the involvement of GLT-1 in the development of morphine dependence and the expression of morphine withdrawal.
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