In vitro effects of hormones and autacoids on the activity of acid phosphatase in the lysates of endotoxin-activated rat peritoneal and bronchoalveolar macrophages.
Peritoneal and bronchoalveolar macrophages activated in vitro by endotoxin, exhibit alterations in the acid phosphatase activity of cell lysates when certain hormones or autacoids are present in the culture medium. They also show morphological changes concerning general appearance and acid phosphatase cytochemistry. Certain agents known to increase the intracellular levels of cyclic AMP, such as dopamine and prostaglandin E2, decreased this enzyme activity in the lysates of peritoneal macrophages. Adrenalin had no effect on this activity at 14 hours, but was found to increase the activity in the culture medium at the initial hours of incubation. Glucagon decreased whereas insulin increased acid phosphatase activity in bronchoalveolar macrophages. Serotonin or histamine, known to activate phospholipase C, increased this activity in peritoneal or bronchoalveolar macrophages. The results of this study, taken together with previously published data (Kondomerkos et al., 2003), suggest that hormones and autacoids may control certain parameters of macrophage activation including acid phosphatase activity.
Kondomerkos
D J
DJ
Department of Anatomy, Histology and Embryology, Medical School, University of Ioannina, Ioannina, Greece. kondomerkos@hotmail.com
Kalamidas
S A
SA
Kotoulas
O B
OB
D000135:Acid Phosphatase / Q000037:antagonists & inhibitors / Q000378:metabolism*; D000818:Animals; D012898:Autacoids / Q000494:pharmacology*; D002478:Cells, Cultured; D004396:Coloring Agents; D003470:Culture Media; D000242:Cyclic AMP / Q000502:physiology; D004731:Endotoxins / Q000494:pharmacology*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005260:Female; D006416:Hematoxylin; D006728:Hormones / Q000494:pharmacology*; D006861:Hydrogen Peroxide / Q000378:metabolism; D066298:In Vitro Techniques; D008070:Lipopolysaccharides / Q000494:pharmacology; D008262:Macrophage Activation / Q000187:drug effects; D016676:Macrophages, Alveolar / Q000187:drug effects / Q000201:enzymology* / Q000648:ultrastructure; D017737:Macrophages, Peritoneal / Q000187:drug effects / Q000201:enzymology* / Q000648:ultrastructure; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D010738:Type C Phospholipases / Q000502:physiology
D012898:Autacoids; D004396:Coloring Agents; D003470:Culture Media; D004731:Endotoxins; D004791:Enzyme Inhibitors; D006728:Hormones; D008070:Lipopolysaccharides; D006861:Hydrogen Peroxide; D000242:Cyclic AMP; D000135:Acid Phosphatase; D010738:Type C Phospholipases; D006416:Hematoxylin