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Changes in the Leukocyte Distribution and Surface Expression of Adhesion Molecules Induced by Hypothalamic Stimulation in the Cat

2002; Elsevier BV; Volume: 16; Issue: 4 Linguagem: Inglês

10.1006/brbi.2001.0635

1090-2139

Hitoshi Kaname, Yoshinobu Mori, Yasuhisa Sumida, Kunihiro Kojima, Chiharu Kubo, N. Tashiro,

Stress Responses and Cortisol

Emotions and the neuroendocrine system are known to affect leukocyte distribution. However, there have so far been few reports on the relationship between hypothalamically induced emotional behavior and the endocrine–immune response. We previously reported changes in the leukocyte distribution and adhesion molecules induced by anteromedial hypothalamus stimulation (AH stimulation), which elicits restlessness behaviors in the cat. In this study, we examined ventromedial hypothalamus stimulation (VMH stimulation), which elicits threat behaviors. In addition, the endocrine responses after VMH stimulation were evaluated. VMH stimulation as well as AH stimulation induced elevations of plasma cortisol and epinephrine levels and granulocytosis and lymphopenia. In contrast, VMH stimulation induced only an elevation of plasma norepinephrine and elicited an opposite pattern of CD62L expression on the leukocyte subpopulations. The different endocrine–immunological reactions between VMH stimulation and AH stimulation were thus associated with different types of behavioral responses.