We propose the “microbiota‐inflammasome” hypothesis of major depressive disorder (MDD, a mental illness affecting the way a person feels and thinks, characterized by long‐lasting feelings of sadness). We hypothesize that pathological shifts in gut microbiota composition (dysbiosis) caused by stress and gut conditions result in the upregulation of pro‐inflammatory pathways mediated by the Nod‐like receptors family pyrin domain containing 3 (NLRP3) inflammasome (an intracellular platform involved in the activation of inflammatory processes). This upregulation exacerbates depressive symptomatology and further (...) compounds gut dysbiosis. In this review we describe MDD/chronic stress‐induced changes in: 1) NLRP3 inflammasome; 2) gut microbiota; and 3) metabolic pathways; and how inflammasome signaling may affect depressive‐like behavior and gut microbiota composition. The implication is that novel therapeutic strategies could emerge for MDD and co‐morbid conditions. A number of testable predictions surface from this microbiota‐gut‐inflammasome‐brain hypothesis of MDD, using approaches that modulate gut microbiota composition via inflammasome modulation, fecal microbiota transplantation, psychobiotics supplementation, or dietary change. (shrink)

Immunity by William Paul is an overview of fundamental principles of immunology and their experimental basis. The book includes not only well- established facts about the immune system but also recent findings (the role of Th17 cells, regulatory T cells, inflammasomes, etc.), which are skillfully incorporated into the framework of immunological understanding. The presentation is clear and emotionally charged, which makes the reading of Immunity enjoyable. Despite the original intentions, though, the book may appear too challenging for a lay reader (...) to serve as a popular introduction to immunology. Instead, it may help to put already acquired immunological knowledge in order benefiting advanced biology students and researchers. At a deeper level, Immunity provokes questions concerning what counts as relevant and what counts as a landmark in immunology. (shrink)