Antinociceptive actions of peripheral glucose administration

作者：Yamamoto Rinah T^*; Foulds Mathes Wendy; Kanarek Robin B

来源：Pharmacology Biochemistry and Behavior, 2014, 117: 34-39.

DOI：10.1016/j.pbb.2013.12.002

• Morphine
• Glucose
• Antinociception
• Rats

The effects of intraperitoneal (ip) D-glucose administration on antinociception were studied in male Long-Evans rats. Rats were assessed for antinociception using the hot-water tail-withdrawal procedure (54 +/- 0.2 degrees C) to determine if peripheral administration of D-glucose (300, 560, or 720 mg/kg) would enhance morphine-mediated antinociception (MMA) (1.0, 3.0, 42, 5.6, and 10.0 mg/kg cumulative-dosing regime) and if D-glucose (560, 720, or 1000 mg/kg) alone could produce antinociceptive activity that was naloxone (0.32 mg/kg) reversible. Additionally, the actions of D-glucose on MMA were compared with a stereoisomer, L-glucose, which is not metabolized. The results of these studies demonstrate that peripheral administration of D-glucose significantly enhances MMA and that D-glucose alone produces antinociceptive actions that are potentially mediated by the endogenous opioid system. Furthermore, L-glucose failed to have an effect on MMA suggesting that the alterations in antinociception seen with D-glucose are not due to stressors such as osmolality or injection. The current studies provide evidence that D-glucose alteration of antinociception is not simply a response to taste or gustation.

• 出版日期2014-2