Morphine Induces Apoptosis, Inflammation, and Mitochondrial Oxidative Stress via Activation of TRPM2 Channel and Nitric Oxide Signaling Pathways in the Hippocampus.

Molecular Neurobiology
Haci Ömer OsmanlıoğluMustafa Nazıroğlu

Abstract

Morphine as an opioid is an important drug in the treatment of moderate to severe pain. Several stress factors via generation of nitric oxide (NO) and oxidative stress (OS) are responsible for the adverse effects of morphine-induced analgesia, addiction, and antinociceptive tolerance, including altered Ca2+ concentration, inflammation, OS, and release of apoptotic factors. TRPM2 is a Ca2+-permeable cation channel and it is activated by OS and NO. Hence, adverse effect of morphine addiction may occur via the OS and NO-induced TRPM2 activation. Because of the unclear etiology of morphine-induced adverse effects in the hippocampus, investigating the involvement of TRPM2 and NO synthetase (NOS) activations in the treatment of morphine-induced OS, apoptosis, and neuroinflammation is a major challenge. The hippocampal neuron of TRPM2 wild-type (TRPM2-WT) and knockout (TRPM2-KO) mice were divided into control, morphine, NOS inhibitor (L-NAME) + morphine, and TRPM2 channel blockers (ACA and 2-APB) + morphine. The morphine-induced increases of apoptosis, neuron death, OS, lipid peroxidation, caspase-3 and caspase-9, neuroinflammatory cytokines (IL-1β, TNF-α, IL-6), and Ca2+ levels in the hippocampal neuron of TRPM2-WT mouse were decreas...Continue Reading

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Citations

Dec 29, 2020·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Garima SharmaHyoung-Chun Kim
Jun 4, 2021·Frontiers in Neuroscience·Seung Won Lee, Hee Chul Han
Jul 25, 2021·International Journal of Molecular Sciences·Wioletta ZielińskaAlina Grzanka
Oct 31, 2021·Journal of Food Biochemistry·Masood Sadiq ButtMuhammad Rizwan

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