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Updated: Jul 20, 2026

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
Published on: July 29, 2014
[Distribution of morphine in acute morphine-treated rats]
Abstract:
The distribution of morphine in acute morphine-treated rats was studied by immunohistochemistry (PAP). Samples were examined for morphine distribution and localization in internal organs at 10-160 min after intraperitoneal injection of morphine. The results showed that morphine was distributed in the heart, hepatocytes, epithelial cells of the bile canalicular cells in liver, spleen, kidney, adrenal glands, stomach parietal cells, small intestinal villus, pancreas islet, sublingual glands and submandibular glands. Morphine was found in the cardiac tissue, liver, spleen, pancreas islet, small intestinal villus at 10 min after injection and in the cardiac tissue, stomach parietal cells at 160 min after injection. The cause of the postmortem the distribution of morphine in internal organs at different times after injection was discussed. The results of this study may be used as a basis for the choice of samples for the forensic toxicological analysis.
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