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2018-12-19 18:42:09


Boyle CC, et al. Inflammation and dimensions of reward processing following exposure to the influenza vaccine. Psychoneuroendocrinology. 2018 Nov 20;102:16-23.
submited by kickingbird at Dec, 4, 2018 9:33 AM from Psychoneuroendocrinology. 2018 Nov 20;102:16-23.

BACKGROUND:
Alterations in reward processing are a central feature of depression and may be influenced by inflammation. Indeed, inflammation is associated with deficits in reward-related processes in animal models and with dysregulation in reward-related neural circuitry in humans. However, the downstream behavioral manifestations of such impairments are rarely examined in humans.
METHODS:
The influenza vaccination was used to elicit a mild inflammatory response in 41 healthy young adults (age range: 18-22, 30 female). Participants provided blood samples and completed behavioral measures of three key aspects of reward-reward motivation, reward learning, and reward sensitivity-before and 1 day after receiving the influenza vaccine.
RESULTS:
The influenza vaccine led to mild but significant increases in circulating levels of the pro-inflammatory cytokine interleukin-6 (IL-6) (p? .288).
CONCLUSIONS:
These findings contribute to an emerging literature on the nuanced associations between inflammation and reward and demonstrate that even mild alterations in inflammation are associated with multiple facets of reward processing.

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