Functional comparison of different histamine-containing IgE-receptor positive cells.
The present study was performed to investigate the histamine-releasing activity of non-immunological stimuli on cultured mast cell lines in comparison to isolated skin mast cells and basophils as human therapeutic target cells. The ionophore A23187 induced a dose dependent histamine release from all cell populations (enzymatically isolated human skin mast cells, human peripheral basophils and rat basophilic leukemia cells, RBL-1 and RBL-2H3). The lectin concanavalin A and the tripeptide formyl-methionyl-leucyl-phenylalanine activated only basophils, while the neural mediator substance P and compound 48/80 were active only in experiments with skin mast cells. Activators of protein kinase C (different phorbol esters and the non-phorbol mezerein) induced direct histamine release only from basophils. The data provide further evidence for heterogeneity of mast cells and indicate different signal transduction mechanisms following non-immunological activation.
Böttjer
J
J
Department of Dermatology, Medical University of Lübeck, Germany.
Amon
U
U
Wolff
H H
HH
D000818:Animals; D001491:Basophils / Q000187:drug effects / Q000378:metabolism; D006636:Histamine Release / Q000187:drug effects*; D006801:Humans; D007942:Leukemia, Experimental / Q000378:metabolism; D008407:Mast Cells / Q000378:metabolism*; D051381:Rats; D017455:Receptors, IgE / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects; D012867:Skin / Q000166:cytology; D014407:Tumor Cells, Cultured
D017455:Receptors, IgE