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      Blood Brain Barrier Breakdown Following Topical Aldara Treatment

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          Brain inflammation markers are present in several psychiatric and neurodegenerative disorders like major depressive disorder, Alzheimers disease and schizophrenia. Inflammation is also linked to sickness behaviour (social withdrawal, decreased appetite, impaired concentration, irritability), a mechanism by which the body redirects its resources to fight infection and encourage wound healing. The topical application of Aldara triggers systemic type I and II interferon and pro-inflammatory cytokine production, immune cell infiltration into the skin and hyperkeratosis and has been used as a model of psoriasis since 2009(1). We have recently reported that Imiquimod, the active component of Aldara, can enter the brain within 4 hours of topical application(2) and induces a transcriptional interferon and chemokine response in the brain, along with the infiltration of immune cells, a reduction in hippocampal neurogenesis and a reduction in burrowing behaviour(3). To allow us to understand the mechanisms of immune cell entry into the brain following topical Aldara treatment, we investigated blood brain barrier (BBB) integrity using a number of experimental techniques.

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          ScienceOpen Posters
          8 July 2020
          [1 ] University of Glasgow

          This work has been published open access under Creative Commons Attribution License CC BY 4.0 , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Conditions, terms of use and publishing policy can be found at www.scienceopen.com .

          The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

          Life sciences

          Evans blue dye, tight and adherens junctions, leukocyte diapedesis, Aldara, Blood brain barrier


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