Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Scandinavian journal of immunology
42 (1995), S. 0
ISSN:
1365-3083
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
The effects of β-endorphin (βEnd) on phagocytosis in peritoneal macrophages were examined by using flow cytometry (FCM). βEnd enhanced phagocytosis in a dose-dependent manner. Leucine—enkephalin (Leu-Enk), methionine—enkephalin (Met—Enk), α-endorphin (αEnd), γ-endorphin (γEnd), αEnd (18–31) and βEnd (28–31) had no such activity. βEnd (1–27) and βEnd (6–31) enhanced phagocytosis less effectively than βEnd did. Naloxone did not inhibit the enhancement of phagocytosis induced by βEnd. Unstimulated control phagocytosis was partially suppressed in Ca2+-free EGTA-containing solution and even in this solution βEnd enhanced phagocytosis. However, the enhancement was suppressed in the solution containing BAPTA-AM. The present study showed that βEnd enhanced extracellular Ca2+ ([Ca2+]o)-dependent and -independent phagocytosis and that the enhancement is largely dependent on intracellular Ca2+ ([Ca2+]i). These results support the contention that βEnd is one of the mediators that modulates the immune system.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-3083.1995.tb03661.x
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