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      Neuropeptides and their interaction with exercise and immune function

      Immunology and Cell Biology
      Wiley

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          Effects of stress on the immune system.

          Stress, distress and a variety of psychiatric illnesses, notably the affective disorders, are increasingly reported to be associated with immunosuppression. The concept that psychic distress may predispose to medical illness is centuries old but has only recently attracted the attention of the scientific community at large. Interdisciplinary collaboration has established psychoneuroimmunology, or neuroimmunomodulation, as a new field of investigation with the goal of rigorous scientific research into the elusive mind-body connection. This has resulted in the rapid accumulation of information which falls across the boundary lines of psychiatry, immunology, neurosciences and endocrinology. Here David Khansari, Anthony Murgo and Robert Faith review the effects of stress on the endocrine and central nervous systems and the interactions between these systems and the immune response after exposure to stress signals.
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            Possible mechanisms of central nervous system fatigue during exercise

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              Role of serotonin in the immune system and in neuroimmune interactions.

              Serotonin (5-HT) is one of the most extensively studied neurotransmitters of the central nervous system. 5-HT is, however, also present in a variety of peripheral tissues including in constituents of the immune system. The function of 5-HT in the immune system has received increasing attention since about 1984, but has been reviewed only once, in 1985. In recent years, modern techniques of molecular biology such as reverse-transcriptase polymerase chain reaction and targeted gene disruption have made it possible to study new important aspects of 5-HT in the immune system. In the first part of the review, we explore whether 5-HT is involved in interactions between the central nervous and immune systems. It emerges that 5-HT may mediate interactions of these two systems by four different pathways. In the second part, we dissect the functional roles of 5-HT in the immune system. We describe the distribution of 5-HT receptors and the 5-HT transporter on immune cells and estimate which levels 5-HT may attain in the extracellular space in physiological conditions and under pathological circumstances such as inflammation, thrombosis, and ischemia. At these 5-HT concentrations, four major functions for 5-HT emerge. These include T cell and natural killer cell activation, delayed-type hypersensitivity responses, production of chemotactic factors, and natural immunity delivered by macrophages. Finally, we discuss promising future avenues to further advance knowledge of the role of 5-HT in the immune system and in neuroimmune interactions. Copyright 1998 Academic Press.
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                Author and article information

                Journal
                Immunology and Cell Biology
                Immunol Cell Biol
                Wiley
                0818-9641
                1440-1711
                October 27 2000
                October 27 2000
                : 78
                : 5
                : 562-570
                Article
                10.1046/j.1440-1711.2000.00961.x
                7d6e5e39-9695-4428-a597-e82a7f3c10ae
                © 2000
                History

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