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Publication : Effect of mild chronic stress, as a model of depression, on the immunoreactivity of C57BL/6 mice.

First Author  Kubera M Year  1998
Journal  Int J Immunopharmacol Volume  20
Issue  12 Pages  781-9
PubMed ID  9877287 Mgi Jnum  J:52166
Mgi Id  MGI:1328520 Doi  10.1016/s0192-0561(98)00050-2
Citation  Kubera M, et al. (1998) Effect of mild chronic stress, as a model of depression, on the immunoreactivity of C57BL/6 mice. Int J Immunopharmacol 20(12):781-9
abstractText  Numerous studies correlate the state of depression with some abnormalities in the immune response, such as increased numbers of white blood-cells, alterations in sub-populations of leucocytes, suppression of cytotoxic activity of natural-killer cells, increased levels of some autoantibodies and acute-phase proteins. Some of these changes have been attributed to autoimmunological reactions. While the possibilities to evaluate some reactions in depressed patients are limited, an animal model of depression could well simulate this clinical situation, and the chronic mild state of stress is a well accepted one. After undergoing stress for three-weeks, C57BL/6 mice demonstrate in the present study a decrease in thymus weight, as well as increased interleukin-1 and decreased interleukin-2 production. Splenocytes of the depressed mice exert a decrease in natural-killer-cell activity, in the proliferative response to Concanavalin-A, interleukin-1 and anti-CD3 monoclonal antibodies and an increase in the proliferative response to lipopolysaccharides and pokeweed mitogens. Our results also suggest that chronic stress-induced activation of suppressor cells in the spleen, due to elimination of CD8+ cells, increase the proliferation of splenocytes in response to mitogens of T cells.
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