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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | De Nichilo, M. O. Burns, G. F. |
| Description | Author Affiliation: De Nichilo MO ( Cancer Research Unit, Faculty of Medicine, University of Newcastle, N.S.W., Australia.); |
| Abstract | The colony-stimulating factors (CSFs) greatly influence mature macrophage function in vitro: macrophage (M)-CSF induces maturation of monocytes and enhances differentiated cell function; granulocyte-macrophage (GM)-CSF stimulates a variety of antimicrobial functions. In vivo M-CSF is thought to promote differentiation, and GM-CSF is thought to potentiate the inflammatory response. One mechanism by which these differential effects may be achieved is through the receptor-mediated interaction of macrophages with their extracellular matrix. Here we show that M-CSF induces specifically the expression of the alpha v beta 5 integrin receptor, whereas GM-CSF rapidly induces mRNA and surface expression of the alpha v beta 3 integrin. The M-CSF-treated cells acquire a flattened epitheloid phenotype, and on vitronectin the alpha v beta 5 is located in adhesion plaques. These cells do not bind collagen or laminin. In contrast, cells treated with GM-CSF adopt an elongated phenotype on a number of substrates, including collagen and laminin, and express alpha v beta 3 at the leading edge of cells on vitronectin. These results suggest that a primary means by which the CSFs exert their individual effects on mature cells may be through regulating integrin expression. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 6 |
| Volume Number | 90 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1993-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Granulocyte-Macrophage Colony-Stimulating Factor Pharmacology Integrins Biosynthesis Macrophage Colony-Stimulating Factor Macrophages Physiology Antibodies, Monoclonal Blotting, Northern Cell Adhesion Drug Effects Cells, Cultured Extracellular Matrix Proteins Fluorescent Antibody Technique Glycoproteins Genetics Kinetics Macromolecular Substances Cytology RNA, Messenger Metabolism Recombinant Proteins Time Factors Vitronectin Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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