Publication Date:
1991-12-20
Description:
The binding of multivalent immunoglobulin G complexes to Fc receptors (Fc gamma Rs) on macrophages activates multiple immune functions. A murine macrophage cell line, but not a fibroblast cell line, that was transfected with human Fc gamma RIIA mediated phagocytosis and an intracellular Ca2+ concentration ([Ca2+]i) flux upon cross-linking of human Fc gamma RIIA. Transfected macrophages that expressed a truncated receptor lacking 17 carboxy-terminal amino acids phagocytosed small antibody complexes. However, only wild-type transfectants phagocytosed labeled erythrocytes and fluxed [Ca2+]i. Thus, the cytoplasmic domain of human Fc gamma RIIA contains distinct functional regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Odin, J A -- Edberg, J C -- Painter, C J -- Kimberly, R P -- Unkeless, J C -- AI 24322/AI/NIAID NIH HHS/ -- AI 24671/AI/NIAID NIH HHS/ -- AR 33062/AR/NIAMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1785-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Mount Sinai Medical Center, New York, NY 10029.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1837175" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Antibodies, Monoclonal
;
Antigens, Differentiation/genetics/*physiology
;
CHO Cells
;
Calcium/*metabolism
;
Cell Line
;
Cloning, Molecular
;
Cricetinae
;
Homeostasis
;
Humans
;
Immunoglobulin G/metabolism
;
Kinetics
;
Macrophages
;
Mice
;
*Phagocytosis
;
Receptors, Fc/genetics/*physiology
;
Receptors, IgG
;
Recombinant Proteins/metabolism
;
*Transfection
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink