μ Opioid Receptor/MOR Activator

Sinomenine, an alkaloid extracted from Sinomenium acutum, is a blocker of the NF-κB activation. Sinomenine also is an activator of μ-opioid receptor.

Sinomenine hydrochloride (Cucoline hydrochloride), an alkaloid extracted from Sinomenium acutum, is a blocker of the NF-κB activation. Sinomenine also is an activator of μ-opioid receptor.

Kukoamine A, a spermine alkaloid, is an orally active and brain-penetrant component found in the root barks of Lycium chinense (L. chinense) Miller. Kukoamine A inhibits purified Crithidia fasciculata trypanothione reductase and soybean lipoxygenase, activates μ-opioid receptor. Kukoamine A can inhibt cancer cell proliferation, migration and invasion, cause G0/G1 phase cell cycle arrest and induce apoptosis. Kukoamine A exerts neuroprotective effect and can induce autophagy . Kukoamine A inhibits LPS (HY-D1056)-induced NO, ROS, PGE₂, TNF-α, IL-1β, IL-6 production and COX-2 activity. Kukoamine A reverses palmitic acid-induced insulin resistance, lipid accumulation, and oxidative stress via downregulation of Srebp-1c. Kukoamine A can be used for the research of cancer, infection, inflammation, metabolic and neurological disease, such as glioblastoma and Parkinson's disease.

PL37 (Debio-0827) is an orally active, blood-brain barrier permeable dual enkephalinase inhibitor. PL37 inhibits aminopeptidase N, neprilysin, and metalloproteases, thereby blocking the degradation of endogenous enkephalins, elevating enkephalin levels, and activating peripheral μ- and δ-opioid receptors. PL37 induces mitochondrial dysfunction, mitophagy, and apoptosis, inhibits endothelial cell proliferation, migration, invasion, and tube formation, and suppresses hemangioma tumor growth and angiogenesis. PL37 can be used in research related to peripheral neuropathic pain, osteosarcoma-induced hyperalgesia, painful diabetic neuropathy, migraine, bone cancer pain, neuroinflammatory pain, and infantile hemangioma.

M119 (NSC 119910) is a Gβγ subunit and PLCβ3 inhibitor with selective activity toward μ-opioid receptor-related pathways. M119 selectively inhibits Gβγ-dependent PLCβ3 activation, reduces inositol phosphate production, and enhances μ-opioid receptor-mediated antinociception. M119 attenuates acute μ-opioid receptor agonist-induced antinociceptive tolerance and physical dependence in mice. M119 can be used for pain-related research.