Selectivity of mediators released by eosinophils.
The presence of receptors for IgE on eosinophils has drawn the attention on their direct participation in IgE-dependent hypersensitivity reactions. Surface IgE antibodies were detected on eosinophils from allergic patients. The addition of the specific allergen or anti-IgE antibodies to such purified eosinophils induced the release of eosinophil peroxidase, but not of eosinophil cationic protein. These findings associated with results obtained by using electron microscopy and immunogold staining of the various antibodies directed against the granule proteins allowed us to suggest a selectivity in the mediators released by eosinophils. In addition, preliminary results concerning the existence and the functional role of a receptor for IgA on eosinophils are reported, leading to the concept of a particular interaction of eosinophils with immunoglobulins present in the tissues and their participation in local immune responses.
Capron
M
M
Unité Mixte Inserm UI67-CNRS 624, Institut Pasteur, Lille, France.
Tomassini
M
M
Torpier
G
G
Kusnierz
J P
JP
MacDonald
S
S
Capron
A
A
D000944:Antigens, Differentiation, B-Lymphocyte / Q000502:physiology; D001798:Blood Proteins / Q000378:metabolism; D002451:Cell Compartmentation; D003594:Cytoplasmic Granules / Q000502:physiology; D047091:Eosinophil Granule Proteins; D047209:Eosinophil Peroxidase; D004804:Eosinophils / Q000502:physiology*; D005368:Filariasis / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000276:immunology; D007073:Immunoglobulin E / Q000276:immunology*; D007074:Immunoglobulin G / Q000276:immunology; D008222:Lymphokines / Q000502:physiology; D008854:Microscopy, Electron; D010544:Peroxidases / Q000378:metabolism; D029584:Prostatic Secretory Proteins; D011961:Receptors, Fc / Q000502:physiology; D017455:Receptors, IgE; D012260:Ribonucleases
D000944:Antigens, Differentiation, B-Lymphocyte; D001798:Blood Proteins; D047091:Eosinophil Granule Proteins; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D008222:Lymphokines; D029584:Prostatic Secretory Proteins; D011961:Receptors, Fc; D017455:Receptors, IgE; C043076:beta-microseminoprotein; C013059:immunoglobulin-binding factors; D007073:Immunoglobulin E; D047209:Eosinophil Peroxidase; D010544:Peroxidases; D012260:Ribonucleases