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Intracerebroventricularly injected nesfatin-1 activates central cyclooxygenase and lipoxygenase pathways

      Highlights

      • ICV injected nesfatin-1 increases the immunoreactivities of the hypothalamic COXs and LOX.
      • Centrally administrated nesfatin-1 augments hypothalamic COXs and LOX protein expression
      • ICV injection of nesfatin-1 causes an increase in posterior hypothalamic extracellular total prostaglandin level.

      Abstract

      Nesfatin-1 is a multifunctional neuropeptide having crucial autonomic roles. It is well known that nesfatin-1 collaborates with other central neuromodulatory systems, such as central corticotropin-releasing hormone, melanocortin, oxytocin, and cholinergic systems to show its autonomic effects. Central arachidonic acid cascade plays an important role to provide the homeostasis by exhibiting similar autonomic effects to nesfatin-1. Based on these similarities, the current study was designed to show the effects of intracerebroventricularly (ICV) injected nesfatin-1 on the hypothalamic arachidonic acid (AA) cascade.
      Immunochemistry and western blot approaches demonstrated that ICV administration of nesfatin-1 provokes an increase in the hypothalamic cyclooxygenase (COX) -1, -2 and lipoxygenase (LOX) protein expression. Moreover, the microdialysis study demonstrated that centrally injected nesfatin-1 increased the posterior hypothalamic extracellular AA products.
      In conclusion, these findings report that while nesfatin-1 is generating its autonomic effects, it also might be using central prostaglandins and leukotrienes by activating central COX and LOX pathways.

      Keywords

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