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2002 | 50 | 3-4 | 181-189

Article title

Stress and immunity: minireview.

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Stress, a state of threatened homeostasis, may be induced by various physical or psychological factors (stressors), including antigenic stimulation. Stressful experiences may affect both physical/psychological well being and immune functioning of humans and animals; the ongoing immune reaction may affect other physiological functions and psychological comfort. The molecular basis of these effects involves a network of multidirectional signalling and feedback regulations of neuroendocrine- and immunocyte-derived mediators. The consecutive stages of the multistep immune reactions might be either inhibited or enhanced owing to the previous and/or parallel stress experiences, depending on the kind of stressor and the animal species, strain, gender, or age. Therefore, the final results of stress-induced alteration of immune reactions are difficult to predict. The effect of a particular stressor on immune functions varies according to the previous stress experience of the individual (e.g. social confrontation, sterile saline injection) while various stressors may act in the same or in opposite ways on the same immune parameter. In general, the efficacy of immune response depends on the neuroendocrine environment on which it is superimposed. Conversely, neural and endocrine responses depend on the concurrent immune events upon which they are superimposed. It seems that the consequences of stress on the immune functioning are generally adaptive in the short run but can be damaging when stress is chronic.




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B. Plytycz, Department of Evolutionary Immunobiology, Institute of Zoology, Jagiellonian University, R. Ingardena 6, 30-060 Krakow, Poland


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