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• W2904075983 abstract "Anxiety and depression are associated with increased pain responses in chronic pain states. The extent to which anxiety drives chronic pain, or vice versa, remains an important question that has implications for analgesic treatment strategies. Here, the effect of existing anxiety on future osteoarthritis (OA) pain was investigated, and potential mechanisms were studied in an animal model. Pressure pain detection thresholds, anxiety, and depression were assessed in people with (n = 130) or without (n = 100) painful knee OA. Separately, knee pain and anxiety scores were also measured twice over 12 months in 4730 individuals recruited from the general population. A preclinical investigation of a model of OA pain in normo-anxiety Sprague-Dawley (SD) and high-anxiety Wistar Kyoto (WKY) rats assessed underlying neurobiological mechanisms. Higher anxiety, independently from depression, was associated with significantly lower pressure pain detection thresholds at sites local to (P < 0.01) and distant from (P < 0.05) the painful knee in patients with OA. Separately, high anxiety scores predicted increased risk of knee pain onset in 3274 originally pain-free people over the 1-year period (odds ratio = 1.71; 95% confidence interval = 1.25-2.34, P < 0.00083). Similarly, WKY rats developed significantly lower ipsilateral and contralateral hind paw withdrawal thresholds in the monosodium iodoacetate model of OA pain, compared with SD rats (P = 0.0005). Linear regressions revealed that baseline anxiety-like behaviour was predictive of lowered paw withdrawal thresholds in WKY rats, mirroring the human data. This augmented pain phenotype was significantly associated with increased glial fibrillary acidic protein immunofluorescence in pain-associated brain regions, identifying supraspinal astrocyte activation as a significant mechanism underlying anxiety-augmented pain behaviour." @default.
• W2904075983 created "2018-12-22" @default.
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• W2904075983 date "2018-12-05" @default.
• W2904075983 modified "2023-10-14" @default.
• W2904075983 title "The impact of anxiety on chronic musculoskeletal pain and the role of astrocyte activation" @default.
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• W2904075983 doi "https://doi.org/10.1097/j.pain.0000000000001445" @default.
• W2904075983 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6407811" @default.
• W2904075983 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30779717" @default.
• W2904075983 hasPublicationYear "2018" @default.
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