Protective Effect of Esculetin, Natural Coumarin in Mice Model of Fibromyalgia: Targeting Pro-Inflammatory Cytokines and MAO-A.

Abstract

Fibromyalgia is a refractory syndrome characterized by chronic wayward pain and complex co-morbid psychological trepidation. The current treatments have a limited role and proper clinical benefits are far from satisfactory. Naturally occurring coumarins such as osthole are known to have analgesic and anti-inflammatory activities. Therefore, the current investigation was designed to explore the potential of natural coumarin esculetin (2.5, 5, and 10 mg/kg) in mitigating reserpine-induced fibromyalgia in Swiss albino mice. Esculetin is a 6,7 dihydroxy-coumarin obtained from various plant sources such as Aesculus hippocastanum L, Ceratostigma willmottianum, Citrus limonia, etc. Reserpine (0.5 mg/kg/day s.c.) treatment for first 3 days, significantly altered the behavior of mice as evidenced by reduced paw withdrawal threshold in pressure application measurement (PAM) test and electronic von-Frey (eVF) test, increased immobility time in forced swim test (FST), increased latency to reach the platform in Morris water maze (MWM) test and reduced number of square crossed in the open field test (OFT). These behavioral deficits with reserpine treatment were integrated with a reduced level of serotonin (5-HT), reduced glutathione (GSH), along with an increase in monoamine oxidase-A (MAO-A) activity, pro-inflammatory cytokines (IL-1β, TNF-α), thiobarbituric acid reactive substances (TBARS) and glutamate level. Esculetin (10 mg/kg/day i.p) treatment for 5 days, significantly abrogated reserpine induced behavioral and biochemical alterations. Whereas, no significant improvement was observed with lower doses of esculetin i.e. 2.5 and 5 mg/kg.

• Authors: Lovedeep Singh, Anudeep Kaur, Saweta Garg, Amrit Pal Singh, Rajbir Bhatti
• Journal: Neurochemical research (Neurochem Res) Vol. 45 Issue 10 Pg. 2364-2374 (Oct 2020) ISSN: 1573-6903 [Electronic] United States
• PMID: 32676949 (Publication Type: Journal Article)

Chemical References

• Analgesics
• IL1B protein, mouse
• Interleukin-1beta
• Neurotransmitter Agents
• Tumor Necrosis Factor-alpha
• Umbelliferones
• Serotonin
• Glutamic Acid
• Reserpine
• Monoamine Oxidase
• Glutathione
• esculetin

Topics

• Analgesics (therapeutic use)
• Animals
• Female
• Fibromyalgia (chemically induced, drug therapy)
• Glutamic Acid (metabolism)
• Glutathione (metabolism)
• Interleukin-1beta (metabolism)
• Lipid Peroxidation (drug effects)
• Mice
• Monoamine Oxidase (metabolism)
• Morris Water Maze Test (drug effects)
• Neurotransmitter Agents (metabolism)
• Open Field Test (drug effects)
• Reserpine
• Serotonin (metabolism)
• Tumor Necrosis Factor-alpha (metabolism)
• Umbelliferones (therapeutic use)