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• W2565451246 endingPage "810" @default.
• W2565451246 startingPage "802" @default.
• W2565451246 abstract "In Brief Despite considerable advances in understanding mechanisms involved in chronic pain, effective treatment remains elusive. Comorbid conditions including anxiety, depression, and cognitive impairment further impact quality of life. Chronic pain is associated with reversible changes in brain anatomy and function and with long-term changes in gene expression. Epigenetic mechanisms, including DNA methylation, contribute to wide-spread and long-lasting reprogramming of gene expression. We previously reported decreases in global DNA methylation in the mouse frontal cortex 6 months after induction of neuropathic pain using the spared nerve injury (SNI) model. Here, we examined the therapeutic effect of increasing DNA methylation using the methyl donor S-adenosylmethionine (SAM). S-adenosylmethionine is marketed as a nutritional supplement for a range of conditions including liver disease, depression, osteoarthritis, fibromyalgia, and dementia. Three months after SNI or sham surgery, animals were treated with SAM (20 mg/kg, 3×/week) or saline orally for 4 months, and the impact on sensory, motor, motivational, and cognitive indices was measured. S-adenosylmethionine attenuated SNI-induced mechanical hypersensitivity and reduced active avoidance of mechanical stimuli but had no effect on cold sensitivity or motor capacity. S-adenosylmethionine completely blocked nerve injury–induced cognitive impairment and attenuated SNI-induced decreases in global DNA methylation in the frontal cortex. In summary, chronic oral administration of the methyl donor, SAM, attenuated sensory and cognitive symptoms associated with nerve injury in mice. These effects may be mediated, in part, through modulation of DNA methylation in the central nervous system by systemic administration of the methyl donor SAM. Chronic treatment with the methyl donor and nutritional supplement S-adenosylmethionine attenuated peripheral nerve injury–induced hypersensitivity, cognitive impairment, and DNA hypomethylation in the mouse frontal cortex." @default.
• W2565451246 created "2017-01-06" @default.
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• W2565451246 date "2016-12-22" @default.
• W2565451246 modified "2023-10-17" @default.
• W2565451246 title "Therapeutic benefits of the methyl donor S-adenosylmethionine on nerve injury–induced mechanical hypersensitivity and cognitive impairment in mice" @default.
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• W2565451246 doi "https://doi.org/10.1097/j.pain.0000000000000811" @default.
• W2565451246 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28030474" @default.
• W2565451246 hasPublicationYear "2016" @default.
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