Endocannabinoid modulation of inflammatory hyperalgesia in the IFN-α mouse model of depression

Publication date: Available online 7 September 2019Source: Brain, Behavior, and ImmunityAuthor(s): Marie Fitzgibbon, Daniel M Kerr, Rebecca J Henry, David P Finn, Michelle RocheAbstractDepression is a well-recognised effect of long-term treatment with interferon-alpha (IFN-α), a widely used treatment for chronic viral hepatitis and malignancy. In addition to the emotional disturbances, high incidences of painful symptoms such as headache and joint pain have also been reported following IFN-α treatment. The endocannabinoid system plays an important role in emotional and nociceptive processing, however it is unknown whether repeated IFN-α administration induces alterations in this system. The present study investigated nociceptive responding in the IFN-α-induced mouse model of depression and associated changes in the endocannabinoid system. Furthermore, the effects of modulating peripheral endocannabinoid tone on inflammatory pain-related behaviour in the IFN-α model was examined. Repeated IFN-α administration (8,000IU/g/day) to male C57/Bl6 mice increased immobility in the forced swim test and reduced sucrose preference, without altering body weight gain or locomotor activity, confirming development of the depressive-like phenotype. There was no effect of repeated IFN-α administration on latency to respond in the hot plate test on day 4 or 7 of treatment, however, formalin-evoked nociceptive behaviour was significantly increased in IFN...
Source: Brain, Behavior, and Immunity - Category: Neurology Source Type: research

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Source: Infant Behavior and Development - Category: Child Development Source Type: research
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Endocannabinoid modulation of inflammatory hyperalgesia in the IFN-α mouse model of depression. Brain Behav Immun. 2019 Sep 07;: Authors: Fitzgibbon M, Kerr DM, Henry RJ, Finn DP, Roche M Abstract Depression is a well-recognised effect of long-term treatment with interferon-alpha (IFN-α), a widely used treatment for chronic viral hepatitis and malignancy. In addition to the emotional disturbances, high incidences of painful symptoms such as headache and joint pain have also been reported following IFN-α treatment. The endocannabinoid system plays an important role in emotional and no...
Source: Brain, Behavior, and Immunity - Category: Neurology Authors: Tags: Brain Behav Immun Source Type: research
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