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Clinical and Diagnostic Laboratory Immunology, 07 1996, 423-428, Vol 3, No. 4
C Wenisch, B Parschalk, A Weiss, K Zedwitz-Liebenstein, B Hahsler, H Wenisch, A Georgopoulos and W Graninger
Flow cytometry was used to study phagocytic function (uptake of fluorescein
isothiocyanate-labeled bacteria) and release of reactive oxygen products
(dihydrorhodamine 123 converted to rhodamine 123) following phagocytosis by
neutrophil granulocytes of heparinized whole blood treated with adrenaline,
noradrenaline, dopamine, dobutamine, or orciprenaline. Reduced neutrophil
phagocytosis and reactive oxygen production were seen at 12 micrograms of
adrenaline per liter (72% each compared with control values); at 120
micrograms of noradrenaline (72% each), dobutamine (83 and 80%,
respectively), and orciprenaline (81 and 80%, respectively) per liter; and
at 100 micrograms of dopamine per liter (66 and 70%) (P < 0.05 for all).
At these dosages, neutrophil chemotaxis was reduced to < 50% of control
values for all catecholamines. Treatment with catecholamines at lower
dosages had no significant effect on phagocytosis or generation of reactive
oxygen products or chemotaxis. The phagocytic capacity of granulocytes was
related to the generation of reactive oxygen products (r = 0.789; P <
0.05). The results demonstrate that catecholamines have a suppressive
effect on the response of phagocytic cells to bacterial pathogens at high
therapeutic levels in blood.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
High-dose catecholamine treatment decreases polymorphonuclear leukocyte phagocytic capacity and reactive oxygen production
Department of Infectious Diseases, University Hospital of Vienna, Austria.
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