Cited by 47Protein Kinase Regulation and GTPase SignalingProtein Tyrosine PhosphatasesCellular transport and secretion

Alterations in Differentiation and Behavior of Monocytic Phagocytes in Transgenic Mice that Express Dominant Suppressors of ras Signaling

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Jin, Dong Il, Jameson, Stephen B., Reddy, M. Amarender, Schenkman, Daniel, Ostrowski, Michael C.·1995·Molecular and Cellular Biology

Abstract

To address the role of ras signaling in monocytic phagocytes in vivo, the expression of two dominant suppressors of in vitro ras signaling pathways, the carboxyl-terminal region of the GTPase-activating protein (GAP-C) and the DNA binding domain of the transcription factor ets-2, were targeted to this cell compartment. A 5-kb portion of the human c-fms proximal promoter was shown to direct expression of the transgenes to the monocytic lineage. As a result of the GAP-C transgene expression, ras-GTP levels were reduced in mature peritoneal macrophages by 70%. The terminal differentiation of monocytes was altered, as evidence by the accumulation of atypical monocytic cells in the blood. Mature peritoneal macrophages exhibited changes in colony-stimulating factor 1-dependent survival and structure. Further, expression of the colony-stimulating factor 1-stimulated gene urokinase plasminogen activator was inhibited in peritoneal macrophages. The results indicate that ras action is critical in monocytic cells after these cells have lost the capacity to traverse the cell cycle.

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Crossref · 10.1128/mcb.15.2.693

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Authors
Jin, D. I., Jameson, S. B., Reddy, M. A., Schenkman, D., & Ostrowski, M. C.
Affiliations
Duke Medical Center (US)
Venue
Molecular and Cellular Biology
Published
1995-02
Volume
15
Issue
2
Pages
693-703
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2160680028
Cited by
47
References
49
Citations by year
2017: 1 · 2014: 1 · 2013: 2
FWCI
2.11
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (CA-53271, R01CA053271)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
Ras signaling, peritoneal macrophages, monocyte differentiation, dominant suppressor, GTPase-activating protein, ETS2, transgenic mice, colony-stimulating factor 1, urokinase, cell cycle arrest, cell survival
MeSH terms
Animals, Cell Differentiation, Female, Fluorescent Antibody Technique, Guanosine Triphosphate, Humans, Male, Mice, Inbred Strains, Mice, Transgenic, Monocytes, Promoter Regions, Genetic, Genes, ras, RNA, Messenger, Urokinase-Type Plasminogen Activator, Signal Transduction, Gene Expression, Macrophage Colony-Stimulating Factor, Genes, fms, Macrophages, Peritoneal, ras Proteins, Mice

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