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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Lotem, J. Sachs, L. |
| Abstract | Normal myeloid precursors and MGI(+)D(+) myeloid leukemic cells can be induced to differentiate to mature cells by the normal protein inducer MGI. The sequence of differentiation is the induction of C3 and Fc rosettes, C3 and Fc immune phagocytosis (IP), synthesis and secretion of lysozyme, and formation of mature macrophages and granulocytes. Mutant clones of myeloid leukemic cells have been isolated with differences in the time of induction of C3 and Fc rosettes and C3 and Fc IP, in which lysozyme was induced without going through the stage of Fc or C3 IP, and with differences in inducibility by MGI to mature macrophages or granulocytes. Only one out of five MGI(-)D(-) clones gave rise to MGI(+)D(+) mutants. The ability to obtain mutants from this clone was associated with its special chromosome constitution, and these mutants showed a change in their ability for cap formation by concanavalin A. The steroid inducer dexamethasone can induce in MGI(+)D(+) clones differentiation to macrophages but not to granulocytes. Differentiation by steroid inducer in different clones occurred either with or without induction of Fc rosettes and Fc IP, and induction of C3 rosettes was not always associated with induction of C3 IP. The use of mutants that differ in their competence to be induced by MGI or steroid inducer has shown that there are separate controls for the induction of C3 and Fc rosettes, C3 and Fc IP, lysozyme, macrophages, and granulocytes. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 12 |
| Volume Number | 74 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1977-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cell Differentiation Leukemia, Myeloid Pathology Animals Cell Line Complement C3 Metabolism Granulocytes Cytology Immunoglobulin Fc Fragments Immunologic Capping Leukemia, Experimental Genetics Macrophages Muramidase Phagocytosis Rosette Formation Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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