β-Funaltrexamine

β-Funaltrexamine (β-FNA) is a selective, irreversible antagonist of the μ opioid receptor (μopioid receptor) with anti-inflammatory and neuroprotective properties. It reduces TLR4 signaling, inhibits cytokine-induced iNOS activation and neuroinflammation, and improves neuronal degeneration. Additionally, β-Funaltrexamine suppresses NF-κB signaling and chemokine expression in human astrocytes and mice. This compound is utilized in research for neurodegenerative diseases, such as stroke.