Abstract
The profound depression of fluid pinocytosis observed in mitotic cells (Berlin, R. D., et al. 1978. Cell. 15:327--341) is documented by quantitative microspectrofluorimetry of fluorescein-labeled dextran uptake in single cells. In J774.2 macrophages, fluid pinocytosis is reduced 30-fold during mitosis. The depression develops within 30 s of entry into prophase and recovers with equal rapidity upon emergence from telophase into G1. This characteristic pattern of fluid pinocytosis forms the basis of a new method for detailed kinetic analysis of the duration of mitosis and its phases. The analysis is applied to the J774.2 macrophage cell line but should be generally applicable to other lines. Effects of ouabain and colchicine on the length of mitosis and its phases are evaluated, revealing a selective prolongation of metaphase by ouabain and suggesting a role for microtubules in the transition from G2 into mitosis.
Full Text
The Full Text of this article is available as a PDF (977.3 KB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Berlin R. D., Oliver J. M., Walter R. J. Surface functions during Mitosis I: phagocytosis, pinocytosis and mobility of surface-bound Con A. Cell. 1978 Oct;15(2):327–341. doi: 10.1016/0092-8674(78)90002-8. [DOI] [PubMed] [Google Scholar]
- Muschel R. J., Rosen N., Bloom B. R. Isolation of variants in phagocytosis of a macrophage-like continuous cell line. J Exp Med. 1977 Jan 1;145(1):175–186. doi: 10.1084/jem.145.1.175. [DOI] [PMC free article] [PubMed] [Google Scholar]
- PUCK T. T., STEFFEN J. LIFE CYCLE ANALYSIS OF MAMMALIAN CELLS. I. A METHOD FOR LOCALIZING METABOLIC EVENTS WITHIN THE LIFE CYCLE, AND ITS APPLICATION TO THE ACTION OF COLCEMIDE AND SUBLETHAL DOSES OF X-IRRADIATION. Biophys J. 1963 Sep;3:379–397. doi: 10.1016/s0006-3495(63)86828-9. [DOI] [PMC free article] [PubMed] [Google Scholar]
- QUASTLER H., SHERMAN F. G. Cell population kinetics in the intestinal epithelium of the mouse. Exp Cell Res. 1959 Jun;17(3):420–438. doi: 10.1016/0014-4827(59)90063-1. [DOI] [PubMed] [Google Scholar]
- Quintart J., Leroy-Houyet M. A., Trouet A., Baudhuin P. Endocytosis and chloroquine accumulation during the cell cycle of hepatoma cells in culture. J Cell Biol. 1979 Sep;82(3):644–653. doi: 10.1083/jcb.82.3.644. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ralph P., Nakoinz I. Phagocytosis and cytolysis by a macrophage tumour and its cloned cell line. Nature. 1975 Oct 2;257(5525):393–394. doi: 10.1038/257393a0. [DOI] [PubMed] [Google Scholar]
- Silverstein S. C., Steinman R. M., Cohn Z. A. Endocytosis. Annu Rev Biochem. 1977;46:669–722. doi: 10.1146/annurev.bi.46.070177.003321. [DOI] [PubMed] [Google Scholar]