Binding and ingestion of human lactoferrin by mouse alveolar macrophages.
نویسندگان
چکیده
59Fe-labelled human lactoferrin was found to be preferentially ingested by mouse alveolar macrophages (MAM) when compared to 59Fe-labelled human transferrin. The cells bound and ingested 125I-labelled iron-saturated and iron-free lactoferrin. The latter was digested faster (t1/2 = 5.8 hours), however, than the iron-saturated compound (t1/2 = 10.5 hours). The constant elimination of the Fe-lactoferrin complex by alveolar macrophages could enhance the bacteriostatic effect of lactoferrin in the pulmonary secretions.
منابع مشابه
Localization of Epidermal-Type Fatty Acid Binding Protein (E-FABP) in Degeneration and Regeneration of Sciatic Nerve after Crush Injury in Mouse
Purpose:The regeneration of axon and myelin sheet after crush injury of peripheral nerves involves interaction of several types of cells, including Schwann cells, monocyte, macrophage and fibroblast. Among them, haematogenous macrophages invading into the peripheral nervous systein play a major role in myelin uptake during Wallerian degeneration. Materials and Methods: In this study 35 C57/BL6 ...
متن کاملStudies of the Macrophage Complement Receptor
Macrophages possess on their plasma membranes receptors for the Fc portion of IgG and for the third complnent of complement (1,2) . These receptors are important in the performance of some of the functions of these cells . The Fc receptors mediate both attachment and ingestion of IgG-coated particles (3,4) . However, the complement receptors of mouse peritoneal macrophages and of human and rabb...
متن کاملHETEROGENEITY OF MACROPHAGE POPULATIONS: ANTIBODIES DETECTING VARIOUS POPULATIONS OF MACROPHAGES
Two groups of antibodies against mouse resident alveolar and peritoneal macrophages have been raised individually in rabbits by immunization with whole cell suspensions of lavaged alveolar and peritoneal macrophages. The whole antisera reacted positively with neutrophils and lymphocytes. However, upon extensive absorptions with these cells the activity became restricted to macrophages. The...
متن کاملThe ingestion and digestion of human lactoferrin by mouse peritoneal macrophages and the transfer of its iron into ferritin
Human lactoferrin (Lf) labeled with 125I and/or 59Fe was found to be ingested in vitro by mouse peritoneal macrophages (MPM). The uptake measured after 15 h incubation reached a saturation point at a concentration of 200 microgram/ml in the culture medium, whatever was the iron content of Lf. In such conditions, the uptake of transferrin (Tf) used as a control was 10 times lower. At a concentra...
متن کاملTHE ROLE OF ALVEOLAR MACROPHAGES IN THE PRODUCTION OF COLONY –STIMULATING FACTOR BY THE LUNG
The role of alveolar macrophages in the production of granulocyte/ macrophage colony-stimulating factor(s) by the rat lung was investigated. Lavaged lungs, when incubated at proper weight per volume of culture medium, produced the same amount of colony-stimulating factor as unlavaged ones. Both lavaged and unlavaged lungs produced similar types of colony-stimulating factor (s). Prolonged i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Thorax
دوره 34 2 شماره
صفحات -
تاریخ انتشار 1979