Opioid drugs that are prescribed for reducing pain can be mediated through immune cells, reveals study.
Highlights
- Opioid drugs are pain relieving drugs that act by blocking the signals in the brain.
- New signaling pathway involves activation of opioid receptors in the immune cells.
- Immune cells were found to increase the analgesic effect of opioid drugs.
Opioid drugs like morphine is a standard treatment for pain. These drugs were found to reduce the pain by decreasing the sensory neurons in the brain.
Since most of the pain conditions were often linked with the peripheral nerve tissues that are infiltrated with the immune cells.
Prof. Dr. Halina Machelska, researcher at the Department of Anesthesiology and Critical Care Medicine at the Charite-Campus Benjamin Franklin, said, "This prompted us to ask whether opioids could also inhibit pain by acting on immune cells.”
"We hypothesized that opioids act at opioid receptors on immune cells and release endogenous opioid peptides such as endorphins, enkephalins and dynorphins. The secreted opioid peptides would then activate neuronal opioid receptors and reduce pain."
The research team led by professor Machelska found that three different opioid receptor agonist drugs in animal model was found to reduce pain.
Professor, Machelska, said, "We were able to show that opioid agonists activate opioid receptors on immune cells, which triggered the release of endogenous painkillers (opioid peptides) and produced analgesia in a mouse model of neuropathic pain."
The study findings were found to be relevant for most of the pain conditions like cancer pain, arthritis, nerve damage that were associated with an immune response.
Opioids acting directly within the peripheral inflammed tissue will not produce undesirable effects like nausea, breathing difficulties and addiction.
The study findings were found to help in providing new opioids that exert analgesia which is infiltrated by the immune cells.
Opioid Drugs
Opioid drugs are powerful pain relieving drugs that are prescribed for managing both acute and chronic pain. These drugs act mainly by blocking the pain signals in the brain.
Examples of opioid painkillers include: morphine, methadone, hydrocodone and oxycodone.
References
- What drugs are opioids? - (https://www.naabt.org/faq_answers.cfm?ID=4)
- Safe Use, Storage, and Disposal of Opioid Drugs - (https://familydoctor.org/safe-use-storage-and-disposal-of-opioid-drugs/)
Source-Medindia