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We examined proopiomelanocortin (POMC) mRNA and beta-endorphin expression in the hypothalamus of mice after various nociceptive stimuli. The time-course study (10 min, 30 min, 1 h, 2 h, and 10 h) showed that the POMC mRNA level significantly increases from 1 h after s.c. formalin injection and returns to the control level at 10 h. Intrathecal (i.t.)(More)
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