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M9620220.TXT
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1996-02-26
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Document 0220
DOCN M9620220
TI Adrenergic blockade ameliorates cellular immune responses to mental
stress in humans.
DT 9602
AU Bachen EA; Manuck SB; Cohen S; Muldoon MF; Raible R; Herbert TB; Rabin
BS; Brain Behavior and Immunity Center, University of Pittsburgh, PA;
15260, USA.
SO Psychosom Med. 1995 Jul-Aug;57(4):366-72. Unique Identifier : AIDSLINE
MED/96076059
AB This study evaluated the sympathoadrenal modulation of behaviorally
evoked immune responses by administration of a nonselective adrenoceptor
antagonist (labetalol) to subjects exposed to mental stress. In a 2 x 2
factorial design, subjects were assigned to a labetalol or saline
condition and, within each condition, were exposed either to acute
laboratory stress or no stress (control). Lymphocyte subsets, natural
killer (NK) cell cytotoxicity, and T cell proliferation to
phytohemagglutinin and concanavalin A were assessed pre-experimentally,
at baseline after infusion and after 18 minutes of mental stress (or
rest). By comparison with the other three conditions, the saline-stress
group showed a greater peripheral NK cell number and cytotoxicity, lower
mitogenic response to phytohemagglutinin and concanavalin A, and
diminished ratio of CD4:CD8 cells after the stressor. As predicted,
immune responses did not differ among the remaining groups
(labetalol-stress, saline-rest, labetalol-rest). Group differences in NK
cell cytotoxicity were not significant after controlling for differences
in NK cell numbers. These findings demonstrate that the occurrence of
certain immunologic responses to acute psychological stress are
dependent on concomitant activation of the sympathetic nervous system.
DE Adolescence Adrenal Glands/INNERVATION Adrenergic
alpha-Antagonists/*PHARMACOLOGY Adrenergic
beta-Antagonists/*PHARMACOLOGY Adult Blood Pressure/DRUG
EFFECTS/PHYSIOLOGY Cytotoxicity, Immunologic/*DRUG EFFECTS/IMMUNOLOGY
CD4-CD8 Ratio/DRUG EFFECTS Heart Rate/DRUG EFFECTS/PHYSIOLOGY Human
Immune Tolerance/DRUG EFFECTS/IMMUNOLOGY Killer Cells, Natural/DRUG
EFFECTS/IMMUNOLOGY Labetalol/*PHARMACOLOGY Lymphocyte Count/DRUG
EFFECTS Lymphocyte Subsets/*DRUG EFFECTS/IMMUNOLOGY Lymphocyte
Transformation/*DRUG EFFECTS/IMMUNOLOGY Male Stress,
Psychological/*COMPLICATIONS/IMMUNOLOGY Support, Non-U.S. Gov't
Support, U.S. Gov't, P.H.S. Sympathetic Nervous System/DRUG
EFFECTS/PHYSIOLOGY T-Lymphocytes/DRUG EFFECTS/IMMUNOLOGY CLINICAL
TRIAL JOURNAL ARTICLE RANDOMIZED CONTROLLED TRIAL
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).