The time intervals of changes in withdrawal latency responses to heat and cold stimuli
(top and middle panels) and mechanical threshold (bottom panels) on the control and
treated sides of foot induced by 2,5-hexanedione (2,5-HD) intoxication in ZDF rats
compared to lean control (LC) rats. Withdrawal latency responses to heat and cold stimuli
and mechanical threshold showed significant decreases in the control value of ZDF rats
compared to LC rats. Mechanical tolerance thresholds and withdrawal latencies to heat and
cold stimuli were significantly decreased on both sides of the foot at 3, 6, and 14 days
after 2,5-HD treatments in ZDF and LC rats. Values are mean ± SEM (n = 5-6/group).
*: P < 0.05, compared with before treatment; #: P < 0.05, compared with LC
rats.